CN110862584A - Preparation method of environment-friendly degradable novel material - Google Patents
Preparation method of environment-friendly degradable novel material Download PDFInfo
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- CN110862584A CN110862584A CN201911050784.8A CN201911050784A CN110862584A CN 110862584 A CN110862584 A CN 110862584A CN 201911050784 A CN201911050784 A CN 201911050784A CN 110862584 A CN110862584 A CN 110862584A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/04—Starch derivatives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/12—Agar-agar; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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Abstract
The invention discloses a preparation method of an environment-friendly degradable novel material, which comprises the following steps of firstly, putting plant fibers into a pulverizer to be pulverized, and then sieving the pulverized plant fibers with a 200-mesh sieve to obtain a raw material A; step two, adding the raw material A into a cooking pot, cooking for a period of time, and repeatedly beating to be colloidal to obtain a raw material B; and step three, pouring the plant extract and the modified starch into a stirrer, adding clear water and agar, and stirring for a period of time to obtain slurry A. The preparation method of the environment-friendly degradable novel material is characterized in that the material is prepared from pure natural products, is convenient to degrade, has good toughness, moisture permeability and oxygen permeability, and can completely replace the existing safety film to work, so that the problem that the preservative film after being used is very troublesome to recycle due to the fact that PVC raw materials are difficult to degrade and cannot degrade, and the environment is polluted greatly is solved.
Description
Technical Field
The invention relates to the technical field of environment-friendly materials, in particular to a preparation method of an environment-friendly degradable novel material.
Background
Environmental protection is environmental protection, which is a general term for protecting the natural environment for the welfare of the nature and human beings, at the level of individuals, organizations or governments, and refers to various actions taken by human beings for solving real or potential environmental problems, coordinating the relationship between human beings and the environment, and ensuring the sustainable development of the economic society.
The preservative film is a kitchen article, is mainly used for cooking in a kitchen and carrying food, or is used for making materials which can be simply cleaned, and is favored by people due to the characteristics of convenience, economy and attractiveness. Many plastic wrap raw materials are PVC, a large amount of plasticizers such as DEHP must be added, DEHP can seep out in medium-high temperature or grease environments, and related researchers indicate that PVC is the most rejected plastic, and the content of DEHP must be limited.
The preservative film after being used is difficult to degrade due to the fact that PVC raw materials are difficult to degrade, recycling is very troublesome, the preservative film cannot be degraded, and the environment can be greatly polluted, so that research and development of the degradable environment-friendly preservative film are imperative.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of an environment-friendly degradable novel material, which solves the problems that the recycling of the used preservative film is very troublesome because PVC raw materials are difficult to degrade, and the preservative film cannot be degraded, so that the environment is greatly polluted.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation method of an environment-friendly degradable novel material specifically comprises the following steps:
step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for a period of time, taking out, and repeatedly beating to be colloidal to obtain a raw material B;
pouring the plant extract and the modified starch into a stirrer, adding clear water and agar, and stirring for a period of time to obtain slurry A;
step four, putting the raw material B prepared in the step two into the slurry A, and stirring for a period of time to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
Preferably, in the third step, the weight ratio of the plant extract, the modified starch, the clear water and the agar is 3-6:30-50:42-51: 4-8.
Preferably, 3-6 parts of plant extract and 30-50 parts of modified starch are poured into a stirrer, 42-51 parts of clear water and 4-8 parts of agar are added, and the mixture is stirred for 1-2 hours at the rotating speed of 600-800r/min to prepare the slurry A.
Preferably, in the fourth step, the weight ratio of the raw material B to the slurry A is 45-55: 35-50.
Preferably, the raw material B45-55 parts prepared in the step two is put into the slurry A35-50 parts and stirred at the rotating speed of 250-400r/min for 10-15h to prepare the slurry B.
Preferably, the raw material A prepared in the step one is added into a cooking pot, cooked for 6 hours at the constant temperature of 85 ℃, taken out and repeatedly beaten to be gelatinous to prepare the raw material B.
Preferably, the plant fiber is extracted from one or more of flax, ramie, jute and bamboo fiber.
Preferably, the plant antibacterial liquid is extracted from one or more of scutellaria baicalensis, coptis chinensis, phellodendron amurense, sappan wood, madder, chrysanthemum, lithospermum, mustard extract, hot pepper and garlic.
Modified starch is prepared by subjecting natural starch to appropriate chemical treatment, introducing certain chemical groups to change molecular structure and physicochemical properties, and generating starch derivatives, wherein starch is a polysaccharide substance, and unmodified starch has two structures: amylose and amylopectin, which are polymeric polysaccharides, are usually poorly water-soluble and are often modified starches, i.e., water-soluble starches, soluble starches are modified starch derivatives obtained by different treatments, which are insoluble in cold water, ethanol and ether, and are dissolved or dispersed in boiling water to form colloidal solutions or milky liquids.
(III) advantageous effects
The invention provides a preparation method of an environment-friendly degradable novel material. The method has the following beneficial effects:
the preparation method of the environment-friendly degradable novel material comprises the steps of firstly, after plant fibers are extracted, sterilizing and impurity removing treatment is carried out on the plant fibers, then the plant fibers are put into a crusher to be crushed, and then the plant fibers are screened by a 200-mesh sieve to obtain a raw material A; step two, adding the raw material A prepared in the step one into a cooking pot, cooking for a period of time, taking out, and repeatedly beating to be colloidal to obtain a raw material B; pouring the plant extract and the modified starch into a stirrer, adding clear water and agar, and stirring for a period of time to obtain slurry A; step four, putting the raw material B prepared in the step two into the slurry A, and stirring for a period of time to prepare slurry B; and step five, performing vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to prepare a finished film product, wherein the material is prepared from pure natural products, is not only convenient to degrade, but also has good toughness, moisture permeability and oxygen permeability, and can completely replace the existing safety film for working, so that the problems that the PVC raw material of the preservative film after use is difficult to degrade, the recycling is very troublesome, the preservative film cannot degrade, and the environment is polluted greatly are solved.
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.
The embodiment of the invention provides three technical schemes: a preparation method of an environment-friendly degradable novel material comprises the following steps:
the first embodiment,
Step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for 6 hours at the constant temperature of 85 ℃, taking out, and repeatedly beating to be gelatinous to prepare a raw material B;
pouring 3 parts of plant extract and 30 parts of modified starch into a stirrer, adding 42 parts of clear water and 4 parts of agar, and stirring at the rotating speed of 800r/min for 1 hour to prepare slurry A;
step four, putting 45 parts of the raw material B prepared in the step two into 50 parts of the slurry A, and stirring at the rotating speed of 400r/min for 10 hours to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
Example II,
Step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for 6 hours at the constant temperature of 85 ℃, taking out, and repeatedly beating to be gelatinous to prepare a raw material B;
pouring 6 parts of plant extract and 35 parts of modified starch into a stirrer, adding 44 parts of clear water and 5 parts of agar, and stirring at the rotating speed of 600r/min for 2 hours to obtain slurry A;
step four, putting 43 parts of the raw material B prepared in the step two into 47 parts of the slurry A, and stirring at the rotating speed of 250r/min for 15 hours to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
Example III,
Step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for 6 hours at the constant temperature of 85 ℃, taking out, and repeatedly beating to be gelatinous to prepare a raw material B;
pouring 5 parts of plant extract and 40 parts of modified starch into a stirrer, adding 46 parts of clear water and 6 parts of agar, and stirring at the rotating speed of 700r/min for 1.5 hours to prepare slurry A;
step four, putting 50 parts of the raw material B prepared in the step two into 45 parts of the slurry A, and stirring at the rotating speed of 300r/min for 13 hours to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
Example four,
Step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for 6 hours at the constant temperature of 85 ℃, taking out, and repeatedly beating to be gelatinous to prepare a raw material B;
pouring 7 parts of plant extract and 45 parts of modified starch into a stirrer, adding 48 parts of clear water and 7 parts of agar, and stirring at the rotating speed of 700r/min for 1.5 hours to prepare slurry A;
step four, putting 52 parts of the raw material B prepared in the step two into 47 parts of the slurry A, and stirring at the rotating speed of 300r/min for 13 hours to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
Example V,
Step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for 6 hours at the constant temperature of 85 ℃, taking out, and repeatedly beating to be gelatinous to prepare a raw material B;
pouring 6 parts of plant extract and 50 parts of modified starch into a stirrer, adding 51 parts of clear water and 8 parts of agar, and stirring at the rotating speed of 600r/min for 2 hours to obtain slurry A;
step four, putting 55 parts of the raw material B prepared in the step two into 35 parts of the slurry A, and stirring at the rotating speed of 250r/min for 15 hours to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
In conclusion, the toughness of the novel composite film prepared by the scheme in the first embodiment of the invention is weaker than that of the second embodiment and the third embodiment, and the novel composite film can be used only by slight pulling;
compared with the toughness of the third embodiment, the toughness of the novel composite material film prepared by the scheme in the second embodiment of the invention is slightly weak, and the novel composite material film can be normally pulled for use, cannot be easily broken and has high damage rate;
compared with the toughness of the first embodiment, the toughness of the novel composite material film prepared by the scheme in the third embodiment of the invention is stronger, the novel composite material film can be normally pulled for use, and cannot be easily broken, and the damage rate is low;
compared with the toughness of the third embodiment, the toughness of the novel composite material film prepared by the scheme in the fourth embodiment of the invention is slightly stronger, the novel composite material film can be normally pulled for use, and cannot be easily broken, and the damage rate is very low;
the novel composite material film prepared by the scheme in the fifth embodiment of the invention has excellent toughness, the embodiment has large pulling property, and objects can be tightly wrapped.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A preparation method of an environment-friendly degradable novel material is characterized by comprising the following steps: the method specifically comprises the following steps:
step one, after plant fibers are extracted, sterilizing and impurity removing the plant fibers, then putting the plant fibers into a crusher for crushing, and then screening through a 200-mesh sieve to obtain a raw material A;
step two, adding the raw material A prepared in the step one into a cooking pot, cooking for a period of time, taking out, and repeatedly beating to be colloidal to obtain a raw material B;
pouring the plant extract and the modified starch into a stirrer, adding clear water and agar, and stirring for a period of time to obtain slurry A;
step four, putting the raw material B prepared in the step two into the slurry A, and stirring for a period of time to prepare slurry B;
and step five, carrying out vacuum defoaming treatment on the slurry B prepared in the step four, and then extruding the treated slurry B by using an extruder to obtain a film finished product.
2. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: in the third step, the weight ratio of the plant extract, the modified starch, the clear water and the agar is 3-6:30-50:42-51: 4-8.
3. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: 3-6 parts of plant extract and 30-50 parts of modified starch are poured into a stirrer, 42-51 parts of clear water and 4-8 parts of agar are added, and the mixture is stirred for 1-2 hours at the rotating speed of 600-.
4. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: in the fourth step, the weight ratio of the raw material B to the slurry A is 45-55: 35-50.
5. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: and (3) putting 45-55 parts of the raw material B prepared in the step (II) into 35-50 parts of the slurry A, and stirring at the rotating speed of 250-400r/min for 10-15h to prepare the slurry B.
6. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: and (3) adding the raw material A prepared in the step one into a cooking pot, cooking for 6 hours at the constant temperature of 85 ℃, taking out, and repeatedly beating to be colloidal to obtain a raw material B.
7. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: the plant fiber is extracted from one or more of flax, ramie, jute and bamboo fiber.
8. The method for preparing the environment-friendly degradable novel material according to claim 1, wherein the method comprises the following steps: the plant antibacterial liquid is extracted from one or more of scutellaria baicalensis, coptis chinensis, phellodendron, sappan wood, madder, chrysanthemum, lithospermum, mustard extract, hot pepper and garlic.
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Application publication date: 20200306 |