CN107022121B - A kind of compounded rubber and preparation method thereof microsphere modified based on spitball shape graphene - Google Patents
A kind of compounded rubber and preparation method thereof microsphere modified based on spitball shape graphene Download PDFInfo
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Abstract
The invention discloses a kind of compounded rubber and preparation method thereof microsphere modified based on spitball shape graphene, which is formed by 100 parts of synthetic rubber, 0.1~10 part of spitball shape graphene microballoon, 0.5~5 part of vulcanizing agent, 3~10 parts of vulcanization accelerators and 5~20 parts of other auxiliary combinations.Spitball shape graphene microballoon has good mechanical property and elasticity, can effectively promote the mechanical strength of rubber, absorbs impact, improves material rebounds, improves thermal conductivity.On the one hand spitball shape structure reduces the stacking of graphene, can be with fine dispersion, on the other hand so that graphene filler has impact resistance and elasticity after being added in rubber.The compounded rubber microsphere modified based on spitball shape graphene of the present invention has excellent mechanical strength, wearability, resilience, anti-flammability.
Description
Technical field
The invention belongs to rubber materials, are related to a kind of compounded rubber and its preparation microsphere modified based on spitball shape graphene
Method.
Background technology
Rubber has unique high resiliency at room temperature, and light weight, application is wide, as a kind of important strategic goods and materials
It is widely used in the fields such as national economy, new and high technology and defence and military however, simple rubbery intensity is low, modulus is low, resistance to
Poor, the antifatigue difference of mill, filler reinforcement is required for without practicability, therefore for most rubber.Carbon black (CB) and white carbon
(SiO2) it is the main reinforcing agent of traditional rubber, it is widely used in various rubber products, but while reinforcing rubber, by
The phase mutual friction between filler, macromolecular chain inside the intrinsic glutinous bullet hysteresis loss of rubber material and rubber, dynamic environment
The lower rubber product used will produce a large amount of heat.And when the heat of generation cannot conduct in time, inside rubber
Meeting steep temperature rise, makes its performance deteriorate, this needs to improve the thermal conductivity of rubber product to improve the usability under its dynamic uses
Energy and service life.Nano filling is combined to obtain the compounded rubber of more preferable performance, such as with rubber there are many researcher before this
Fullerene, montmorillonite, expanded graphite, carbon nanotube etc. are added, but these materials are easy to reunite, it is difficult to this high viscous in rubber
Disperse in degree system, and balance cannot be obtained in various performances, thus application range is relatively narrow.
Graphene is a kind of two-dimensional material of atomic thickness, and specific surface area, excellent mechanical property with superelevation, height are led
Heating rate and self lubricity.These characteristics make it be widely studied in terms of composite material so that the performance of high molecular material obtains
To improvement.But graphene is easy to reunite, and can re-form graphite stacked structure, and reducing it enhances performance.Although can pass through
Dispersant and the method being surface modified are added to promote the dispersibility of graphene and reduce the stacking of graphene, but these
Method improves the cost of graphene, and introduces new ingredient.Patent 201510208883.X《What a kind of graphene was modified
Abrasive rubber》Rubber is enhanced using multi-layer graphene, improves whole mechanical performance.Patent 201610705206.3
《A kind of compounded rubber and its preparation based on three-dimensional grapheme modification》It is compound with rubber with three-dimensional grapheme, utilize three-dimensional structure
Its thermal conductivity is improved while promoting rubber mechanical property.
Invention content
The purpose of the present invention is insufficient in view of the prior art, provide and a kind of answer based on spitball shape graphene is microsphere modified
Close rubber and preparation method thereof.
The purpose of the present invention is what is be achieved through the following technical solutions：It is a kind of to answer based on spitball shape graphene is microsphere modified
Rubber is closed, includes following component in parts by mass：100 parts of rubber, 0.1~10 part of spitball shape graphene microballoon, 0.5~5 part of sulphur
Agent, 3~10 parts of vulcanization accelerators and 5~20 parts of other auxiliary agents.The spitball shape graphene microballoon is wrinkled by single-layer graphene film
Pleat forms, and microsphere diameter is 500nm~5 μm, and density is 0.2~0.4g/cm3, carbon-to-oxygen ratio is 20~60, and specific surface area is less than
200m2/g。
The spitball shape graphene microballoon is prepared by following steps：
(1) single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon；
(2) the graphene oxide microballoon for obtaining step (1), is placed in reducibility gas atmosphere and is restored, gone back
Former graphene oxide microballoon；
(3) the redox graphene microballoon for obtaining step (2) carries out high-temperature process, and temperature is higher than 1000 DEG C, obtains
Spitball shape graphene microballoon.
Further, in the single-layer graphene oxide dispersion liquid of the step (1), reducing agent can also be contained.It is being atomized
In the process, fold occurs for graphene oxide sheet, meanwhile, reducing agent is attached to sheet surfaces with molecular conformation.The reducing agent is
Hydrogen iodide, hydrogen bromide, hydrazine hydrate, vitamin C, sodium borohydride etc..Reducing agent and single-layer graphene oxide mass ratio be 0.1~
10.Atomization drying temperature in the step (1) is 100~200 DEG C so that is wrapped in the reducing agent in pleated structure to oxidation
Graphene is tentatively restored.
Further, the reducing atmosphere described in step (2) is hydrazine hydrate steam, hydroiodic acid steam, hydrogen, hydrobromic acid
It is one or more in steam.Reducing condition is：30min~48h or so is restored at 60~200 DEG C.
Further, the high-temperature process temperature described in step (3) be 2500~3000 DEG C, processing time be 30min~
48h, atmosphere are one kind in nitrogen, helium, hydrogen argon gas gaseous mixture, argon gas.
Further, the rubber is natural rubber, nitrile rubber, silicon rubber, butadiene rubber, isoprene rubber, butylbenzene
One or more of rubber, EP rubbers, neoprene.
Further, other described auxiliary agents include：2~5 parts of stearic acid, 0.5~2 anti-aging agent, 0.5~3 part of atoleine,
2~10 parts of zinc oxide.
Further, the vulcanizing agent is that sulphur, peroxide, metal oxide, resin curing agent, sulfur-bearing are organic
At least one of object.
A kind of preparation method based on the microsphere modified compounded rubber of spitball shape graphene, includes the following steps：
(1) will rubber, spitball shape graphene microballoon, vulcanization accelerator and other auxiliary agents be added mixer in be kneaded 10~
30min, melting temperature are 40~90 DEG C, stand 5~8h later；
(2) by after standing batch mixing and vulcanizing agent be placed in 40~90 DEG C of open mill and be kneaded, be finally placed on tablet
Vulcanize on vulcanizer, vulcanizes 10~40min at 150~180 DEG C.
The beneficial effects of the present invention are：Graphene oxide microballoon is prepared by atomization drying method first in the present invention,
Reducing agent is added in graphene oxide dispersion before atomization drying, is uniformly mixed, reducing agent is made to be supported on molecular forms
Graphene oxide sheet surface.Later during atomization drying, the oxygen-containing function of partial reduction agent and surface of graphene oxide
Group reacts, and product is deviate from the volatilization of solvent, and remaining reducing agent is then attached to graphene oxide sheet table with molecular forms
Face, and be wrapped with its gauffer.Second step uses electronation, under reducing atmosphere, inside graphene oxide microballoon
It is fully reacted with reducing agent with the oxygen-containing functional group on surface, lower temperature makes the generation of gas and release slow, avoids
Group fast eliminating generates gas, the phenomenon that causing volume drastically to expand in directly heat-treating, thus maintain graphene still with
The form of fold piece is combined closely without detaching.On the one hand third step high temperature thermal reduction makes remaining a small amount of oxygen-containing functional group de-
Structure the defects of is removed, and repair graphene oxide sheet, on the other hand, makes remaining moisture in microballoon, reduzate and not anti-
The reducing agent removing answered.In addition, we have been surprisingly found that in an experiment, and at extreme temperatures under (2500~3000 DEG C), graphene
The diameter of microballoon is gradually reduced, and density increases, and specific surface area reduces.This may be due under graphitization temperature, graphene film
Perfect structure so that graphene fold binding force enhances, and graphene film intermolecular forces increase, mutual Distance Shortened,
Gradually make the compact structure of graphene ball.Gained spitball shape graphene microballoon has good mechanical property and elasticity, can have
Effect absorbs impact, and stability is strong.In addition, spitball shape structure reduces the stacking of graphene, whole stability is improved.Spitball
Shape graphene ball can effectively promote the mechanical strength of rubber, absorb and impact and promote material rebounds.The addition of graphene also improves
The thermal conductivity and anti-flammability of material entirety so that compounded rubber has higher service life.
Description of the drawings
Fig. 1 is the microscopic appearance of the spitball shape graphene microballoon prepared through the embodiment of the present invention 1.
Fig. 2 is the microscopic appearance of the expanded graphite alkene ball prepared through present invention comparison 2.
Specific implementation mode
The method based on the microsphere modified compounded rubber of spitball shape graphene of preparation includes the following steps：
(1) single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon.The list
It can also contain reducing agent in layer graphene oxide dispersion.Reducing agent is hydrogen iodide, hydrogen bromide, hydrazine hydrate, vitamin C, boron
Sodium hydride etc..Reducing agent is 0.1~10 with single-layer graphene oxide mass ratio.Atomization drying temperature is 100~200 DEG C；(2) will
The graphene oxide microballoon that step (1) obtains, is placed in reducibility gas atmosphere, and 30min~48h is restored at 60~200 DEG C
Obtain redox graphene microballoon；The reducing atmosphere is in hydrazine hydrate steam, hydroiodic acid steam, hydrobromic acid steam
It is one or more；(3) the redox graphene microballoon for obtaining step (2) carries out high-temperature process, and temperature is higher than 1000 DEG C, obtains
To spitball shape graphene microballoon；Atmosphere is nitrogen, helium, hydrogen argon gas gaseous mixture, one kind in argon gas, and processing time is
30min~48h.Further, the temperature treatment temperature is 2500~3000 DEG C.(4) the paper nodular graphite for obtaining step (3)
It is kneaded in 5~20 parts of 0.1~10 part of alkene microballoon, 100 parts of rubber, 3~10 parts of vulcanization accelerator and other auxiliary agents addition mixers
10~30min, melting temperature are 40~90 DEG C, stand 5~8h later.Other auxiliary agents include：2~5 parts of stearic acid, 0.5~2 are prevented
Old agent, 0.5~3 part of atoleine, 2~10 parts of zinc oxide.(5) batch mixing that step (4) obtains and 0.5~5 part of vulcanizing agent are set
Be kneaded in 40~90 DEG C of open mill, be finally placed on vulcanizing press and vulcanize, at 150~180 DEG C vulcanize 10~
40min is obtained based on the microsphere modified compounded rubber of spitball shape graphene.Sulphur, peroxide, metal oxide, resinae
Vulcanizing agent, sulfurous organic compound at least one of.
The present invention is specifically described below by embodiment, the present embodiment is served only for doing further the present invention
It is bright, it should not be understood as limiting the scope of the invention, those skilled in the art makes one according to the content of foregoing invention
A little nonessential changes and adjustment belong to protection scope of the present invention.
Embodiment 1：
(1) single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon, atomization temperature
Degree is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and 1h is restored at 60 DEG C and is obtained
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 1000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 5
It is kneaded 15min in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 2 parts of atoleine, zinc oxide addition mixers, melting temperature is
70 DEG C, 6h is stood later；
(5) batch mixing that step (4) obtains and 4 parts of sulphur are placed in 60 DEG C of open mill and are kneaded, be finally placed on flat
Vulcanize on plate vulcanizer, vulcanize 30min at 160 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is fold microballoon of the diameter at 3~5 μm under microcosmic, as shown in Figure 1.Its density is 0.2g/cm3, carbon-to-oxygen ratio 22.7, specific surface
Product is 190m2/g.The performance of gained rubber is as shown in table 2.
Embodiment 2：
(1) single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon, atomization temperature
Degree is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and 1h is restored at 90 DEG C and is obtained
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 1000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 6
It is kneaded 15min in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 2 parts of atoleine, zinc oxide addition mixers, melting temperature is
70 DEG C, 6h is stood later；
(5) batch mixing that step (4) obtains and 3.5 parts of sulphur are placed in 60 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 30min at 160 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic lower for fold microballoon of the diameter at 3~5 μm.Its density is 0.23g/cm3, carbon-to-oxygen ratio 23.1, specific surface area 181m2/
g.The performance of gained rubber is as shown in table 2.
Embodiment 3：
(1) single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon, atomization temperature
Degree is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 1000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 8
It is kneaded 15min, melting temperature in 4 parts of part, 1.5 parts of stearic acid, 1 part of anti-aging agent, 2 parts of atoleine, zinc oxide addition mixers
It is 70 DEG C, stands 6h later；
(5) batch mixing that step (4) obtains and 4 parts of sulphur are placed in 60 DEG C of open mill and are kneaded, be finally placed on flat
Vulcanize on plate vulcanizer, vulcanize 30min at 160 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic lower for fold microballoon of the diameter at 3~5 μm.Its density is 0.25g/cm3, carbon-to-oxygen ratio 22.9, specific surface area 166m2/
g.The performance of gained rubber is as shown in table 2.
By comparative example 1~3 it is found that final stone can be significantly reduced by improving second step reduction temperature and time
The specific surface area of black alkene microballoon improves density, but is influenced on carbon-to-oxygen ratio little.This is because second step reduction mainly makes oxidation
The group of graphene surface is slowly removed, and reduction temperature is low or the time is short can cause to restore insufficient, and remaining group exists
It will continue to remove when third portion high-temperature heat treatment, generate gas and graphene film is expanded outward.And spitball shape graphene is micro-
The specific surface area of ball is lower, and density is higher, and representative structure is more closely knit, and resistance to pressure and elasticity are more preferable, compound rear comprehensive with rubber
Performance is more preferable, as shown in table 2.Therefore, to sum up consider, when second step reducing condition is preferably high reduction temperature and long reduction
Between.
Embodiment 4：
(1) ascorbic single-layer graphene oxide dispersion liquid will be contained by atomization drying method to dry, obtain graphite oxide
The mass ratio of alkene microballoon, vitamin C and graphene oxide is 0.4, and atomization temperature is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 1000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.1 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 4
It is kneaded 30min, melting temperature in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 3 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 20min at 170 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic lower for fold microballoon of the diameter at 3~5 μm.Specific performance is as shown in table 1,2.
Embodiment 5：
(1) ascorbic single-layer graphene oxide dispersion liquid will be contained by atomization drying method to dry, obtain graphite oxide
The mass ratio of alkene microballoon, vitamin C and graphene oxide is 1, and atomization temperature is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 1000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.3 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 4
It is kneaded 30min, melting temperature in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 3 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 20min at 170 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic lower for fold microballoon of the diameter at 3~5 μm.Specific performance is as shown in table 1,2.
Embodiment 6：
(1) ascorbic single-layer graphene oxide dispersion liquid will be contained by atomization drying method to dry, obtain graphite oxide
The mass ratio of alkene microballoon, vitamin C and graphene oxide is 5, and atomization temperature is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 1000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.3 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 4
It is kneaded 30min, melting temperature in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 3 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 30min at 180 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic lower for fold microballoon of the diameter at 3~5 μm.Specific performance is as shown in table 1,2.
Embodiment 7：
1) ascorbic single-layer graphene oxide dispersion liquid will be contained by atomization drying method to dry, obtain graphite oxide
The mass ratio of alkene microballoon, vitamin C and graphene oxide is 1, and atomization temperature is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 2000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 8
It is kneaded 30min, melting temperature in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 4 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 30min at 180 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic lower for fold microballoon of the diameter at 2~4 μm.Specific performance is as shown in table 1,2.
Embodiment 8：
(1) ascorbic single-layer graphene oxide dispersion liquid will be contained by atomization drying method to dry, obtain graphite oxide
The mass ratio of alkene microballoon, vitamin C and graphene oxide is 1, and atomization temperature is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 3000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 8
It is kneaded 30min, melting temperature in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 4 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 30min at 180 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
The microcosmic lower fold microballoon for diameter in 500nm~3 μm.Specific performance is as shown in table 1,2.
Embodiment 9：
(1) it is dried by atomization drying method single-layer graphene oxide dispersion liquid, obtains graphene oxide microballoon, atomization temperature
It is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 3000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 7
It is kneaded 30min, melting temperature in 4 parts of part, 1 part of stearic acid, 1 part of anti-aging agent, 2.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 4 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 15min at 160 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
The microcosmic lower fold microballoon for diameter in 500nm~3 μm.Specific performance is as shown in table 1,2.
Comparative example 1：Compounded rubber is prepared according to the method for embodiment 1, unlike, spitball shape is not added in preparation process
Graphene microballoon.Performance is as shown in table 1,2.
Comparative example 2：Graphene oxide microballoon is directly heat-treated without electronation：
(1) single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon, atomization temperature
Degree is 130 DEG C；
(2) the graphene oxide microballoon that step (1) obtains is put into tube furnace, is continually fed into hydrogen-argon-mixed, temperature
3000 DEG C are risen to, heating rate is 5 DEG C/min, keeps the temperature 1h；
(4) 0.2 part of graphene for obtaining step (3), 100 parts of butadiene rubber, 8 parts of vulcanization accelerator TMTD, stearic acid 2
30min is kneaded in 4 parts of part, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers, melting temperature is 80 DEG C, later
Stand 5h；
(5) batch mixing that step (4) obtains and 4 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 30min at 180 DEG C, obtains the compounded rubber of graphene modification.
Through above step, obtained graphene appearance is black fluffy powder, and microcosmic is hollow ball of the diameter at 1~10 μm
Shell, as shown in Figure 2.Performance is as shown in table 1,2.
1 embodiment design parameter of table and property
2 frictional behaviour of table
Comparative example 3~6 by the amount for improving the reducing agent being added before atomization drying it can be found that can be effectively facilitated
Reducing degree of the graphene oxide microballoon before three step process, this is because reducing agent is dispersed in oxidation with molecular forms
Graphene surface can roll into a ball step-reaction, slow reduced graphene so that carbon-to-oxygen ratio carries in the first step and second step with ether ring
It rises, specific surface area reduces.And it is front and back it is found that high-temperature heat treatment causes inside redox graphene microballoon to compare third step reduction
The group not removed is detached from (carbon-to-oxygen ratio increase), and the swelling graphene interlayer structure of gas of generation causes specific surface area to rise.But
It is, after reducing agent raising reproducibility is added, graphene microballoon less release gas of energy when third walks high-temperature heat treatment,
Reduce volume expansion so that structure is more closely knit.Therefore, in order to obtain the graphene microballoon of high density, low specific surface area, add
It is significant to enter reducing agent.
Comparative example 5,7 improves third step reduction it can be found that in the case where ensureing first two steps reducing condition unanimous circumstances
Temperature makes specific surface area increase, and density reduces, this is because the further release of gas causes lamellar structure further to strut.
However, surprisingly, after temperature rises to 3000 DEG C (embodiment 8), specific surface area is greatly lowered, it may be possible to which temperature is high
After graphitization temperature, the big π structures of graphene are repaired, and the binding force between lamella greatly promotes, and interlamellar spacing reduces, because
And make graphene microballoon to center " aggregation ", more densification.
If comparative example 3 can significantly reduce graphite by 3000 DEG C of heat treatments merely 9 it is found that be added without reducing agent
The specific surface area of alkene microballoon.But comparative example 8 realizes that the preceding most of functional group's removing of heat treatment can it is found that reducing agent is added
To obtain the graphene microballoon of more consolidation.
Comparative example 8 and comparative example 1 it is found that in comparative example directly by graphene oxide microballoon carry out high-temperature heat treatment,
Bulk gas effusion leads to volume rapid expanding when reduction, and specific surface area is high, and density is very low.Although can be with one after being added into rubber
Determine degree and promote mechanical property, but since the graphene film of expansion exists, the amplitude of enhancing is less than spitball shape graphene.
Graphene enhance rubber performance and obturator performance it is closely related, the spitball shape graphene microballoon of filling it is close
Degree is higher, and specific surface area is bigger, represents that its structure is more closely knit, and gap is fewer, and structure is more stable, is absorbing impact, rebound and resistance to
The performance of mill etc. is better.Also, particle is smaller, and dispersion is easier to reach stable.Thus, consider, needs to obtain more
For closely knit graphene microballoon.The present invention realizes the densification of graphene microballoon, structure by controlling each step Reduction parameter
Completeization and performance optimization, to effectively improve the comprehensive performance of compounded rubber.
Embodiment 10：
(1) ascorbic single-layer graphene oxide dispersion liquid will be contained by atomization drying method to dry, obtain graphite oxide
The mass ratio of alkene microballoon, vitamin C and graphene oxide is 1, and atomization temperature is 130 DEG C；
(2) the graphene oxide microballoon for obtaining step (1), is placed in hydrazine hydrate steam, and reductase 12 4h is obtained at 90 DEG C
Redox graphene microballoon；
(3) the redox graphene microballoon that step (2) obtains is put into tube furnace, is continually fed into nitrogen, temperature liter
To 3000 DEG C, 1h is kept the temperature, spitball shape graphene microballoon is obtained；
(4) 0.2 part of spitball shape graphene microballoon for obtaining step (3), 100 parts of butadiene rubber, vulcanization accelerator TMTD 8
It is kneaded 30min, melting temperature in 4 parts of part, 2 parts of stearic acid, 1 part of anti-aging agent, 1.5 parts of atoleine, zinc oxide addition mixers
It is 80 DEG C, stands 5h later；
(5) batch mixing that step (4) obtains and 4 parts of vulcanizing agents are placed in 80 DEG C of open mill and are kneaded, be finally placed on
Vulcanize on vulcanizing press, vulcanize 30min at 180 DEG C, obtains based on the microsphere modified compounded rubber of spitball shape graphene.
Through above step, obtain based on the microsphere modified compounded rubber of spitball shape graphene.Spitball shape graphene microballoon exists
It is microcosmic it is lower be diameter in the fold microballoon of 500nm~3 μm, since step (1)~(3) are same as Example 8, graphene is micro-
Carbon-to-oxygen ratio, density, the specific surface area of ball are same as Example 8.Specific nature is as shown in table 2.It can be found that improving graphene ball
Additive amount can further promote the properties of rubber.
Claims (8)
1. a kind of compounded rubber microsphere modified based on spitball shape graphene, which is characterized in that include such as the following group in parts by mass
Point：100 parts of rubber, 0.1 ~ 10 part of spitball shape graphene microballoon, 0.5 ~ 5 part of vulcanizing agent, 3 ~ 10 parts of vulcanization accelerators and 5 ~ 20 parts
Other auxiliary agents；The spitball shape graphene microballoon is formed by single-layer graphene film gauffer, and microsphere diameter is 500nm ~ 5 μm, density
For 0.2 ~ 0.4g/cm3, carbon-to-oxygen ratio is 20 ~ 60, and specific surface area is less than 200m2/g；The spitball shape graphene microballoon is by following step
Suddenly it is prepared：
（1）Single-layer graphene oxide dispersion liquid is dried by atomization drying method, obtains graphene oxide microballoon；The single layer oxygen
In graphite alkene dispersion liquid, containing reducing agent, the reducing agent is hydrogen iodide, hydrogen bromide, hydrazine hydrate, vitamin C or hydroboration
Sodium；Reducing agent is 0.1 ~ 10 with single-layer graphene oxide mass ratio；
（2）By step（1）Obtained graphene oxide microballoon, is placed in reducibility gas atmosphere and is restored, obtain oxygen reduction
Graphite alkene microballoon；
（3）By step（2）Obtained redox graphene microballoon carries out high-temperature process, and temperature is higher than 1000 DEG C, obtains spitball
Shape graphene microballoon.
2. compounded rubber according to claim 1, which is characterized in that the step（1）In atomization drying temperature be 100
~200℃。
3. compounded rubber according to claim 1, which is characterized in that the step（2）In reducing atmosphere be hydration
It is one or more in hydrazine steam, hydroiodic acid steam, hydrobromic acid steam；Reducing condition is：At 60 ~ 200 DEG C restore 30min ~
48h。
4. compounded rubber according to claim 1, which is characterized in that the step（3）In high-temperature process temperature be
2500~3000℃；High-temperature process atmosphere is nitrogen, helium, hydrogen argon gas gaseous mixture, one kind in argon gas, and processing time is
30min~48h。
5. compounded rubber according to claim 1, which is characterized in that the rubber is natural rubber, nitrile rubber, silicon rubber
One or more of glue, butadiene rubber, isoprene rubber, butadiene-styrene rubber, EP rubbers, neoprene.
6. compounded rubber according to claim 1, which is characterized in that the vulcanizing agent is sulphur, peroxide, metal oxygen
At least one of compound, resin curing agent, sulfurous organic compound.
7. compounded rubber according to claim 1, which is characterized in that other described auxiliary agents include：2 ~ 5 parts of stearic acid, 0.5
~ 2 anti-aging agents, 0.5 ~ 3 part of atoleine, 2 ~ 10 parts of zinc oxide.
8. such as the preparation method of claim 1-7 any one of them compounded rubbers, which is characterized in that include the following steps：
（1）Rubber, spitball shape graphene microballoon, vulcanization accelerator and other auxiliary agents are added in mixer and are kneaded 10 ~ 30min,
Melting temperature is 40 ~ 90 DEG C, stands 5 ~ 8h later；
（2）By after standing batch mixing and vulcanizing agent be placed in 40 ~ 90oIt is kneaded in the open mill of C, is finally placed on vulcanizing press
Upper vulcanization vulcanizes 10 ~ 40min at 150 ~ 180 DEG C.
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| US16/622,953 US11225414B2 (en) | 2017-04-28 | 2018-02-26 | Paper ball-like graphene microsphere, composite material thereof, and preparation method therefor |
| RU2019138451A RU2734476C1 (en) | 2017-04-28 | 2018-02-26 | Graphene microspheres in form of paper lump, composite material of such microspheres and method of making such microspheres |
| EP18791151.6A EP3617141B1 (en) | 2017-04-28 | 2018-02-26 | Paper ball-like graphene microsphere, composite material thereof, and preparation method therefor |
| KR1020197034665A KR102307001B1 (en) | 2017-04-28 | 2018-02-26 | Paperball-type graphene microspheres and their composite material and manufacturing method |
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| CN107651672B (en) * | 2017-10-13 | 2019-11-22 | 杭州高烯科技有限公司 | A kind of preparation method of the Ultralight graphene microballoon for solar absorption |
| CN108584924B (en) * | 2018-05-15 | 2020-08-04 | 浙江大学 | Preparation method of pressure-sensitive graphene film |
| CN109233014A (en) * | 2018-09-21 | 2019-01-18 | 佛山市禅城区诺高环保科技有限公司 | A kind of preparation method of butadiene rubber-graphene oxide composite material |
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| CN101993065A (en) * | 2010-12-17 | 2011-03-30 | 中国科学院上海微系统与信息技术研究所 | Method for preparing graphene powder |
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| CN106317505A (en) * | 2016-08-22 | 2017-01-11 | 广东纳路纳米科技有限公司 | Three-dimensional graphene modified rubber composite material and preparation method thereof |
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| CN105384164A (en) * | 2015-12-18 | 2016-03-09 | 上海理工大学 | Crumpled graphene with characteristics of high specific surface area and graded pore structure, and preparation method thereof |
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