CN106832807B - Controllable full-degradable mulching film of cellulose-reinforced starch and preparation method thereof - Google Patents
Controllable full-degradable mulching film of cellulose-reinforced starch and preparation method thereof Download PDFInfo
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- CN106832807B CN106832807B CN201611248692.7A CN201611248692A CN106832807B CN 106832807 B CN106832807 B CN 106832807B CN 201611248692 A CN201611248692 A CN 201611248692A CN 106832807 B CN106832807 B CN 106832807B
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- 229920002472 Starch Polymers 0.000 title claims abstract description 112
- 239000008107 starch Substances 0.000 title claims abstract description 110
- 235000019698 starch Nutrition 0.000 title claims abstract description 110
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000001913 cellulose Substances 0.000 claims abstract description 52
- 229920002678 cellulose Polymers 0.000 claims abstract description 52
- 239000004970 Chain extender Substances 0.000 claims abstract description 23
- 229920000728 polyester Polymers 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000004014 plasticizer Substances 0.000 claims abstract description 8
- 235000010980 cellulose Nutrition 0.000 claims description 45
- 238000002156 mixing Methods 0.000 claims description 19
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 239000004595 color masterbatch Substances 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000010096 film blowing Methods 0.000 claims description 7
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 229940100486 rice starch Drugs 0.000 claims description 6
- 241000196324 Embryophyta Species 0.000 claims description 5
- 229920000331 Polyhydroxybutyrate Polymers 0.000 claims description 5
- 235000011187 glycerol Nutrition 0.000 claims description 5
- 239000005015 poly(hydroxybutyrate) Substances 0.000 claims description 5
- -1 polybutylene adipate-terephthalate Polymers 0.000 claims description 5
- 229920001131 Pulp (paper) Polymers 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 3
- 229930195725 Mannitol Natural products 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000594 mannitol Substances 0.000 claims description 3
- 235000010355 mannitol Nutrition 0.000 claims description 3
- 239000004626 polylactic acid Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 241000609240 Ambelania acida Species 0.000 claims description 2
- 235000005273 Canna coccinea Nutrition 0.000 claims description 2
- 240000008555 Canna flaccida Species 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 229920002261 Corn starch Polymers 0.000 claims description 2
- 235000002722 Dioscorea batatas Nutrition 0.000 claims description 2
- 235000006536 Dioscorea esculenta Nutrition 0.000 claims description 2
- 240000001811 Dioscorea oppositifolia Species 0.000 claims description 2
- 235000003416 Dioscorea oppositifolia Nutrition 0.000 claims description 2
- 240000005979 Hordeum vulgare Species 0.000 claims description 2
- 235000007340 Hordeum vulgare Nutrition 0.000 claims description 2
- 244000017020 Ipomoea batatas Species 0.000 claims description 2
- 235000002678 Ipomoea batatas Nutrition 0.000 claims description 2
- 241000234435 Lilium Species 0.000 claims description 2
- 240000003183 Manihot esculenta Species 0.000 claims description 2
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 2
- 235000010804 Maranta arundinacea Nutrition 0.000 claims description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims description 2
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 240000003829 Sorghum propinquum Species 0.000 claims description 2
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 2
- 244000145580 Thalia geniculata Species 0.000 claims description 2
- 235000012419 Thalia geniculata Nutrition 0.000 claims description 2
- 240000001085 Trapa natans Species 0.000 claims description 2
- 240000006677 Vicia faba Species 0.000 claims description 2
- 235000010749 Vicia faba Nutrition 0.000 claims description 2
- 235000002098 Vicia faba var. major Nutrition 0.000 claims description 2
- 241000219977 Vigna Species 0.000 claims description 2
- 240000004922 Vigna radiata Species 0.000 claims description 2
- 235000010721 Vigna radiata var radiata Nutrition 0.000 claims description 2
- 235000011469 Vigna radiata var sublobata Nutrition 0.000 claims description 2
- 235000010726 Vigna sinensis Nutrition 0.000 claims description 2
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 239000010905 bagasse Substances 0.000 claims description 2
- 235000009120 camo Nutrition 0.000 claims description 2
- 235000005607 chanvre indien Nutrition 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 239000011487 hemp Substances 0.000 claims description 2
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 claims description 2
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims description 2
- 239000008108 microcrystalline cellulose Substances 0.000 claims description 2
- 229940016286 microcrystalline cellulose Drugs 0.000 claims description 2
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 2
- 229920001592 potato starch Polymers 0.000 claims description 2
- 235000013772 propylene glycol Nutrition 0.000 claims description 2
- 235000009165 saligot Nutrition 0.000 claims description 2
- 229940070710 valerate Drugs 0.000 claims description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229940100445 wheat starch Drugs 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 239000000811 xylitol Substances 0.000 claims description 2
- 235000010447 xylitol Nutrition 0.000 claims description 2
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 claims description 2
- 229960002675 xylitol Drugs 0.000 claims description 2
- 229920002961 polybutylene succinate Polymers 0.000 claims 2
- 239000004631 polybutylene succinate Substances 0.000 claims 2
- 240000001251 Cucumis anguria Species 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 235000008779 pepino Nutrition 0.000 claims 1
- 239000004629 polybutylene adipate terephthalate Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007062 hydrolysis Effects 0.000 abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 description 14
- 238000006731 degradation reaction Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 230000003301 hydrolyzing effect Effects 0.000 description 7
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 description 2
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 description 1
- UZBRNILSUGWULW-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione;hexanedioic acid Chemical compound OC(=O)CCCCC(O)=O.O=C1OCCCCOC(=O)C2=CC=C1C=C2 UZBRNILSUGWULW-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 240000002582 Oryza sativa Indica Group Species 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006237 degradable polymer Polymers 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention provides a controllable full-degradable mulching film of cellulose reinforced starch, which comprises the following components in percentage by mass: 10-30% of starch; 5-20% of cellulose; 40-55% of fully degradable polyester; 5-10% of an environment-friendly plasticizer; 5-10% of a filler; 0.05-2% of chain extender. In addition, the invention also provides a preparation method of the controllable fully-degradable mulching film of the cellulose reinforced starch. The controllable full-degradable mulching film of the cellulose reinforced starch mainly adds cellulose into starch and full-degradable polyester, so that the cost of the mulching film is reduced, a small amount of cellulose is added, the mechanical property of the mulching film is improved, the water resistance of the mulching film is improved, and the hydrolysis resistance of the mulching film can be controlled by adjusting the ratio of the starch to the cellulose and the addition of the chain extender.
Description
Technical Field
The invention belongs to the technical field of biodegradable materials, and particularly relates to a controllable fully-degradable mulching film of cellulose reinforced starch and a preparation method thereof.
Background
The agricultural mulching film can effectively regulate the temperature and the humidity of soil, store nutrients and water in the soil, prevent the growth of weeds and create a good ecological environment for the growth of crops. However, most of the existing mulching films are petroleum-based polymers, complete degradation is quite difficult under natural conditions, the application amount and the service life of the mulching films are increased year by year, a large amount of residual mulching films cause white pollution, an environment-friendly society is established for solving the white pollution caused by the waste mulching films, and good interaction between people and the environment is established, and the only method is to popularize and apply the degradable mulching films. The degradable mulching film is a novel environment-friendly degradable mulching film, is a development trend of the mulching film industry in China in future, and is also a necessary premise for developing sustainable agriculture.
At present, the research on the controllable full-degradable mulching film at home and abroad mainly uses full-degradable starch or aliphatic polyester as a raw material, and the patent with the patent number of CN105109165A, "a controllable bio-based full-degradable mulching film" mainly uses polyesters such as PBAT, PLA and the like as raw materials, and solves the problem of the period controllability of the degradable mulching film by adding an ultraviolet absorbent and a light stabilizer; the patent CN103627151, the polyester completely biodegradable mulching film, adopts flexible and rigid polyester as raw materials to realize complete biodegradation; patent No. CN101565514, "a method for producing degradable mulching film", is made by using modified starch and degradable polymer as raw materials, adding inorganic fillers such as nano calcium carbonate powder, blending and blowing film; the patent CN102875231A discloses a fully-degradable top-dressing mulching film and a preparation method thereof, wherein starch and PLA are used as base materials, and fertilizer microcapsules containing polyvinyl alcohol are added to realize the fully-degradable mulching film for top dressing. The mulching films using the fully-degraded polyester as the raw material are difficult to popularize due to high cost, and although the cost can be reduced after the starch is added, the mechanical property and the water resistance of the mulching films are poor after the starch is added, so that the heat preservation and entropy preservation effects of the mulching films are poor.
Disclosure of Invention
The invention aims to overcome the defects of the existing mulching film, provides a controllable fully-degradable mulching film of cellulose reinforced starch and realizes the controllability of hydrolysis resistance of the mulching film.
The technical scheme of the invention provides a controllable fully-degradable mulching film of cellulose reinforced starch, which comprises the following components in percentage by mass: 10-30% of starch; 5-20% of cellulose; 40-55% of fully degradable polyester; 5-10% of an environment-friendly plasticizer; 5-10% of a filler; 0.05-2% of chain extender.
Specifically, the starch is one or more of glutinous rice starch, polished round-grained rice starch, indica rice starch, corn starch, sorghum starch, wheat starch, barley starch, rye starch, cassava starch, sweet potato starch, arrowroot starch, Chinese yam starch, canna starch, mung bean starch, broad bean starch, pea starch, cowpea starch, mixed bean starch, water caltrop powder, lotus root starch, countenance starch, acorn starch, lily starch, arrowhead starch and sago starch.
Specifically, the cellulose is cotton pulp, cotton linter, cotton, hemp, wood pulp fiber, wood pulp, absorbent cotton, microcrystalline cellulose, bagasse, wood, plant straw or cellulose prepared from plant straw.
Specifically, the fully degradable polyester is one or more of polylactic acid (PLA), adipic acid-butylene terephthalate (PBAT), poly (butylene succinate/adipate-butylene succinate) (PBSA), poly (butylene succinate-butylene succinate) (PBST), poly (butylene succinate) (PBS), Polyhydroxybutyrate (PHB), polyhydroxybutyrate valerate (PHBV) and polyhydroxyfatty acid ester (PHA).
Specifically, the environment-friendly plasticizer is one or more of ethylene glycol, propylene glycol, glycerol, xylitol, mannitol or ethanolamine.
Specifically, the filler is one or more of talcum powder, light calcium carbonate, alumina or aluminum hydroxide.
Specifically, the chain extender is one of BASF chain extenders ADR-4368, ADR-4370 and ADR-4370 s.
In addition, the invention also provides a preparation method of the controllable fully-degradable mulching film of the cellulose reinforced starch, which comprises the following steps:
1) uniformly mixing 10-30% of starch, 5-20% of cellulose, 5-10% of an environment-friendly plasticizer and 0.05-2% of a chain extender, and putting the mixture into a homogenizer for reaction to obtain the micronized particles of the cellulose reinforced starch.
2) Adding the micronized particles of the cellulose reinforced starch obtained in the step 1), 40-55% of fully-degradable polyester and 5-10% of filler into a double-screw extruder, and carrying out mixing, extrusion, cooling and granulation processes to obtain uniformly dispersed granules.
The preparation method of the controllable fully-degradable mulching film of the cellulose-reinforced starch further comprises a step 3), the granules obtained in the step 2) are mixed with 5-10% of fully-degradable color master batches and 0.05-2% of ultraviolet absorbers, and the controllable fully-degradable mulching film of the cellulose-reinforced starch is obtained through a three-layer co-extrusion film blowing machine.
Specifically, the color of the fully degradable color master batch is black or white.
Compared with the prior art, the invention has the beneficial effects that:
(1) the controllable full-degradable mulching film of the cellulose reinforced starch provided by the invention takes full-degradable polyester, starch and cellulose as base materials, so that the cost of the mulching film is reduced, and the popularization of the mulching film is facilitated.
(2) The controllable full-degradable mulching film of the cellulose-reinforced starch provided by the invention has the advantages that a small amount of cellulose is added, the mechanical property of the mulching film is improved, the water resistance of the mulching film is improved, and the hydrolysis resistance of the mulching film can be controlled by adjusting the proportion of the starch, the cellulose and the chain extender.
(3) The preparation method of the controllable fully-degradable mulching film of the cellulose-reinforced starch is simple, and the prepared mulching film has good heat preservation and entropy preservation effects, can be completely biodegraded, and has good application prospects.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
uniformly mixing 30% of starch, 5% of cellulose, 5% of ethanolamine and 1% of BASF chain extender ADR-4370, putting the mixture into a homogenizer, realizing the reaction among the starch, the cellulose and the chain extender by utilizing the comprehensive effects of shearing, friction, centrifugal extrusion, liquid flow collision and the like of the homogenizer to obtain micronized particles of the cellulose reinforced starch, then adding 40% of PBSA, 15% of PLA and 4% of alumina, mixing, extruding, cooling, granulating and the like in a double-screw extruder to obtain uniformly dispersed granules, and then matching with 5% of fully degradable color master batch and 2% of ultraviolet absorbent, and carrying out secondary processing through a three-layer co-extrusion film blowing machine to obtain the controllable fully degradable mulching film of the cellulose reinforced starch.
Through detection, the soil-buried degradation of the controllable fully-degradable mulching film of the cellulose-reinforced starch prepared in the embodiment is carried out for 60 days, the mass loss rate of the hydrolytic degradation is close to 87%, the longitudinal tensile strength and the transverse tensile strength of the fully-degradable mulching film are 33.57MPa and 35.47MPa respectively, the longitudinal breaking elongation and the transverse breaking elongation are 457.27% and 436.36% respectively, and the elastic modulus is 254.82 MPa.
Example 2:
uniformly mixing 30% of starch, 10% of cellulose, 8% of mannitol and 1% of Bass chain extender ADR-4368, putting the mixture into a homogenizer, realizing the reaction among the starch, the cellulose and the chain extender by utilizing the comprehensive effects of shearing, friction, centrifugal extrusion, liquid flow collision and the like of the homogenizer to obtain micronized particles of the cellulose reinforced starch, then adding 35% of PBS, 10% of PHA and 6% of light calcium carbonate, mixing, extruding, cooling, granulating and the like in a double-screw extruder to obtain uniformly dispersed granules, and then matching with 5% of fully degradable color master batch and 2% of ultraviolet absorbent, and carrying out secondary processing through a three-layer co-extrusion film blowing machine to obtain the controllable fully degradable mulching film of the cellulose reinforced starch.
Through detection, the soil-buried degradation of the controllable fully-degradable mulching film of the cellulose-reinforced starch prepared in the embodiment is carried out for 60 days, the mass loss rate of the hydrolytic degradation is close to 84%, the longitudinal tensile strength and the transverse tensile strength of the fully-degradable mulching film are 39.14MPa and 43.25MPa respectively, the longitudinal breaking elongation and the transverse breaking elongation are 541.68% and 530.41% respectively, and the elastic modulus is 308.31 MPa.
Example 3:
uniformly mixing 25% of starch, 15% of cellulose, 9% of propylene glycol and 1.5% of BASF chain extender ADR-4368, putting the mixture into a homogenizer, realizing the reaction among the starch, the cellulose and the chain extender by utilizing the comprehensive effects of shearing, friction, centrifugal extrusion, liquid flow collision and the like of the homogenizer to obtain micronized particles of the cellulose reinforced starch, then adding 25% of PBSA, 20% of PLA and 4.5% of talcum powder, mixing, extruding, cooling, granulating and the like in a double-screw extruder to obtain uniformly dispersed particles, and then matching 5% of fully degradable color master batch and 2% of ultraviolet absorbent to obtain the controllable fully degradable mulching film of the cellulose reinforced starch through secondary processing by a three-layer co-extrusion film blowing machine.
Through detection, the soil-buried degradation of the controllable fully-degradable mulching film of the cellulose-reinforced starch prepared in the embodiment is carried out for 60 days, the mass loss rate of the hydrolytic degradation is close to 79%, the longitudinal tensile strength and the transverse tensile strength of the fully-degradable mulching film are 36.27MPa and 38.53MPa respectively, the longitudinal breaking elongation and the transverse breaking elongation are 367.62% and 388.39% respectively, and the elastic modulus is 288.58 MPa.
Example 4:
uniformly mixing 20% of starch, 20% of cellulose, 10% of glycerol and 2% of BASF chain extender ADR-4370s, putting the mixture into a homogenizer, realizing the reaction among the starch, the cellulose and the chain extender by utilizing the comprehensive effects of shearing, friction, centrifugal extrusion, liquid flow collision and the like of the homogenizer to obtain micronized particles of the cellulose reinforced starch, then adding 25% of PBS, 15% of PLA and 8% of light calcium carbonate, mixing, extruding, cooling, granulating and the like in a double-screw extruder to obtain uniformly dispersed granules, and then matching with 5% of fully degradable color master batch and 2% of ultraviolet absorbent to obtain the controllable fully degradable mulching film of the cellulose reinforced starch through secondary processing by a three-layer co-extrusion film blowing machine.
Through detection, the soil-buried degradation of the controllable fully-degradable mulching film of the cellulose-reinforced starch prepared in the embodiment is carried out for 60 days, the mass loss rate of the hydrolytic degradation is close to 72%, the longitudinal tensile strength and the transverse tensile strength of the fully-degradable mulching film are 41.29MPa and 46.44MPa respectively, the longitudinal breaking elongation and the transverse breaking elongation are 366.78% and 354.64% respectively, and the elastic modulus is 318.64 MPa.
Example 5:
uniformly mixing 10% of starch, 20% of cellulose, 10% of glycerol and 2% of BASF chain extender ADR-4370s, putting the mixture into a homogenizer, realizing the reaction among the starch, the cellulose and the chain extender by utilizing the comprehensive effects of shearing, friction, centrifugal extrusion, liquid flow collision and the like of the homogenizer to obtain micronized particles of the cellulose reinforced starch, then adding 30% of PBS, 20% of PLA and 8% of light calcium carbonate, mixing, extruding, cooling, granulating and the like in a double-screw extruder to obtain uniformly dispersed granules, and then matching with 5% of fully degradable color master batch and 2% of ultraviolet absorbent to obtain the controllable fully degradable mulching film of the cellulose reinforced starch through secondary processing by a three-layer co-extrusion film blowing machine.
Through detection, the soil-buried degradation of the controllable fully-degradable mulching film of the cellulose-reinforced starch prepared in the embodiment is carried out for 60 days, the mass loss rate of the hydrolytic degradation is close to 66%, the longitudinal tensile strength and the transverse tensile strength of the fully-degradable mulching film are 39.48MPa and 44.81MPa respectively, the longitudinal breaking elongation and the transverse breaking elongation are 400.59% and 411.73% respectively, and the elastic modulus is 310.22 MPa.
Comparative example:
uniformly mixing 30% of starch and 10% of glycerol, putting the mixture into a homogenizer, plasticizing the starch by utilizing comprehensive effects of shearing, friction, centrifugal extrusion, liquid flow collision and the like of the homogenizer, adding 45% of PBAT, 10% of PLA and 5% of talcum powder, mixing, extruding, cooling, granulating and the like in a double-screw extruder to obtain uniformly dispersed granules, and then matching with 5% of fully-degradable color master batch and 2% of ultraviolet absorbent to obtain the fully-degradable mulching film through secondary processing.
Through detection, the soil burying degradation of the fully-degradable mulching film obtained in the embodiment is carried out for 60 days, the mass loss rate of the hydrolytic degradation is close to 92%, the longitudinal tensile strength and the transverse tensile strength of the fully-degradable mulching film are respectively 25.59MPa and 28.38MPa, the longitudinal breaking elongation and the transverse breaking elongation are respectively 674.12% and 668.31%, and the elastic modulus is 218.73 MPa.
In conclusion, the controllable fully-degradable mulching film of the cellulose-reinforced starch provided by the invention has the advantages that a small amount of cellulose is added, so that the mechanical property of the mulching film is improved; the water resistance of the mulching film is improved, and the mass loss rate of hydrolytic degradation can be reduced to 66%; meanwhile, the hydrolysis resistance of the mulching film can be controlled by adjusting the proportion of starch, cellulose and a chain extender.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (9)
1. A cellulose reinforced starch controllable full-degradable mulching film is characterized in that: comprises the following components: the environment-friendly starch-based composite material comprises micronized particles of cellulose-reinforced starch, fully-degradable polyester and a filler, wherein the micronized particles of the cellulose-reinforced starch are obtained by uniformly mixing starch, cellulose, an environment-friendly plasticizer and a chain extender and reacting in a homogenizer, and the chain extender is one of Basff chain extenders ADR-4368, ADR-4370 and ADR-4370 s;
the mass percentage of the components is as follows: 10-30% of starch; 5-20% of cellulose; 40-55% of fully degradable polyester; 5-10% of an environment-friendly plasticizer; 5-10% of a filler; 0.05-2% of chain extender.
2. The cellulose-reinforced starch controllable full-degradable mulching film according to claim 1, characterized in that: the starch is one or more of glutinous rice starch, polished round-grained rice starch, long-shaped rice starch, corn starch, sorghum starch, wheat starch, barley starch, rye starch, cassava starch, sweet potato starch, arrowroot starch, Chinese yam starch, canna starch, mung bean starch, broad bean starch, pea starch, cowpea starch, water caltrop powder, lotus root starch, pepino starch, acorn starch, lily starch, arrowhead starch and sago starch.
3. The cellulose-reinforced starch controllable full-degradable mulching film according to claim 1, characterized in that: the cellulose is cotton pulp, cotton linter, cotton, hemp, wood pulp fiber, wood pulp, absorbent cotton, microcrystalline cellulose, bagasse, wood, plant straw or cellulose prepared from plant straw.
4. The cellulose-reinforced starch controllable full-degradable mulching film according to claim 1, characterized in that: the fully degradable polyester is one or more of polylactic acid, polybutylene adipate-terephthalate, polybutylene succinate/adipate-butylene glycol, polybutylene terephthalate-butylene succinate, polybutylene succinate, polyhydroxybutyrate and polyhydroxybutyrate valerate.
5. The cellulose-reinforced starch controllable full-degradable mulching film according to claim 1, characterized in that: the environment-friendly plasticizer is one or more of ethylene glycol, propylene glycol, glycerol, xylitol, mannitol and ethanolamine.
6. The cellulose-reinforced starch controllable full-degradable mulching film according to claim 1, characterized in that: the filler is one or more of talcum powder, light calcium carbonate, alumina and aluminum hydroxide.
7. The method for preparing the controllable fully-degradable mulching film of cellulose reinforced starch according to any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the following steps:
1) uniformly mixing 10-30% of starch, 5-20% of cellulose, 5-10% of an environment-friendly plasticizer and 0.05-2% of a chain extender, and putting the mixture into a homogenizer for reaction to obtain micronized particles of cellulose reinforced starch;
2) adding the micronized particles of the cellulose-reinforced starch obtained in the step 1), 40-55% of fully-degradable polyester and 5-10% of filler into a double-screw extruder, and carrying out mixing, extrusion, cooling and granulation processes to obtain uniformly dispersed granules, namely the granules of the controllable fully-degradable mulching film of the cellulose-reinforced starch.
8. The method for preparing the controllable fully-degradable mulching film of cellulose-reinforced starch according to claim 7, wherein the method comprises the following steps: and 3) mixing the granules obtained in the step 2) with 5-10% of fully-degradable color master batch and 0.05-2% of ultraviolet absorbent, and obtaining the controllable fully-degradable mulching film of cellulose reinforced starch through a three-layer co-extrusion film blowing machine.
9. The method for preparing the controllable fully-degradable mulching film of cellulose-reinforced starch according to claim 8, wherein the method comprises the following steps: the color of the fully degradable color master batch is black or white.
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| CN107189108A (en) * | 2017-06-23 | 2017-09-22 | 广西师范学院 | Sisal fiber enhancing environmental protection starch mulch film and preparation method thereof |
| CN107353444A (en) * | 2017-07-07 | 2017-11-17 | 广西师范学院 | The preparation method of degradable tapioca sisal fiber composite |
| CN107236152B (en) * | 2017-07-07 | 2020-04-21 | 南宁师范大学 | Preparation method of high-strength sisal fiber reinforced cassava starch composite material |
| CN107189116B (en) * | 2017-07-07 | 2020-05-15 | 南宁师范大学 | Preparation method of high-heat-resistance cassava starch and sisal fiber composite material |
| CN107216490B (en) * | 2017-07-07 | 2020-07-07 | 南宁师范大学 | Preparation method of hydrophobic cassava starch and sisal fiber composite material |
| CN107418170B (en) * | 2017-08-16 | 2018-08-10 | 吴卓轩 | A kind of preparation method of degradable preserving soil moisture agricultural mulching |
| CN109401225B (en) * | 2018-10-12 | 2022-09-30 | 广东巨塑科技有限公司 | Biodegradable preservative film and preparation method thereof |
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| CN109610034A (en) * | 2018-10-16 | 2019-04-12 | 山东金冠网具有限公司 | A kind of degradable blinding dust-suppression net and preparation method thereof |
| CN112425711B (en) * | 2020-11-23 | 2023-01-24 | 东北林业大学 | Acorn shell extract coating preservative and preparation method thereof |
| CN112646237B (en) * | 2020-12-23 | 2022-04-12 | 哈尔滨学院 | Preparation method of low-cost degradable mulching film |
| CN112778723A (en) * | 2020-12-31 | 2021-05-11 | 武汉华丽环保科技有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
| CN115260718A (en) * | 2022-07-22 | 2022-11-01 | 广东汇齐新材料有限公司 | High-strength high-antibacterial-property composite adhesive film and preparation method thereof |
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