CN114835955A - Method for preparing biodegradable material - Google Patents
Method for preparing biodegradable material Download PDFInfo
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- CN114835955A CN114835955A CN202210307991.2A CN202210307991A CN114835955A CN 114835955 A CN114835955 A CN 114835955A CN 202210307991 A CN202210307991 A CN 202210307991A CN 114835955 A CN114835955 A CN 114835955A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The invention discloses a method for preparing a biodegradable material, which comprises the following materials in parts by weight: 10-15 parts of starch material, 5-8 parts of fiber material, 7-10 parts of biological filler, 10-15 parts of polymer material and 8-11 parts of auxiliary reagent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch, the soybean starch and the wheat starch is 1: 1.3: 1, the fiber material comprises plant fiber and nano-cellulose. The degradable material is prepared by combining a starch material, a fiber material, a biological filler, a polymer material and an auxiliary reagent and by a preparation method of mixing, fermenting and polymerizing, the toughness and the ductility of the prepared degradable material can be effectively improved by adding the fiber material and the biological filler, the using effect of the product is enhanced after the product is prepared, and meanwhile, the preparation process is simple and rapid, and the preparation efficiency of the degradable material can be improved.
Description
Technical Field
The invention relates to the technical field of degradable materials, in particular to a method for preparing a biodegradable material.
Background
A degradable material is a material that is degradable over a period of time in both thermodynamic and kinetic terms. According to the external factors of degradation, the method can be divided into: photodegradable materials, biodegradable materials and the like, and the influencing factors mainly comprise temperature, molecular weight, material structure and the like.
The main material of the traditional degradable material is starch material which is the best raw material for preparing the degradable material at present, but the degradable material prepared from the starch material can realize degradation at best, but the toughness and the ductility of the degradable material are not good, and the best using effect of the degradable material cannot be achieved when related products are prepared.
Disclosure of Invention
The invention aims to provide a method for preparing a biodegradable material, which aims to solve the problems of poor toughness and ductility of the biodegradable material prepared from the starch raw material in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for preparing a biodegradable material comprises the following materials in parts by weight: 10-15 parts of starch material, 5-8 parts of fiber material, 7-10 parts of biological filler, 10-15 parts of polymer material and 8-11 parts of auxiliary reagent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch, the soybean starch and the wheat starch is 1: 1.3: the fiber material comprises plant fibers and nanocellulose, and the mass ratio of the plant fibers to the nanocellulose is 2: 1, the biological filler comprises bamboo powder and rice hull powder, wherein the mass ratio of the bamboo powder to the rice hull powder is 1: the polymer material comprises polystyrene resin, polyglycolic acid and a-hydroxy acid, wherein the mass ratio of the polystyrene resin to the polyglycolic acid to the a-hydroxy acid is 1: 1: the auxiliary reagent comprises a hydrophobic agent, a viscous agent, a catalyst, an antioxidant and a toughening agent, wherein the mass ratio of the hydrophobic agent to the viscous agent to the catalyst to the antioxidant to the toughening agent is 2: 1: 1.2: 1: 1.5.
as a preferred embodiment of the invention, the method comprises the following preparation procedures:
s1, material taking;
s2, mixing;
s3, fermenting;
and S4, polymerizing.
As a preferred embodiment of the present invention, the S2 includes the following steps:
a1. feeding: selecting a small and medium-sized stirring vessel, and pouring the starch material, the fiber material and the biological filler into the stirring vessel;
b1. mixing: placing a stirring vessel filled with the materials on a magnetic stirrer in a magnetic stirring mode, placing a tetrafluoro stirrer in the vessel, adding a hydrophobing agent and an antioxidant, sealing the vessel, adjusting the temperature of the vessel to be 60-70 ℃, and stirring for 20-30 min;
c1. and (3) filtering: after completion of the stirring, the stirred material is filtered through a filter cloth, thereby extracting the material.
As a preferred embodiment of the present invention, the S3 includes the following steps:
a2. taking materials: pouring the extracted material into a stirrer, and adding a proper amount of water, a thickening agent and amylase;
b2. stirring: sealing the stirrer, and adjusting the temperature in the stirrer to 95-110 ℃, wherein the stirring time is 1-2 hours, so that the material is liquefied;
c2. and (3) cooling: after the materials are liquefied, the stirrer is cooled, and yeast powder is added when the temperature is reduced to 30 ℃ for fermentation.
As a preferred embodiment of the present invention, the S4 includes the following steps:
a3. charging: embedding the fermented white particles into a reaction kettle, and adding polymers (polystyrene resin, polyglycolic acid and alpha-hydroxy acid), a catalyst and a toughening agent;
b3. polymerization reaction: esterification reaction is carried out, wherein the vacuum degree in a reaction kettle is 40Kpa, and the reaction is carried out at the temperature of 80-150 ℃ to obtain dehydrated oligomer; secondly, cracking reaction, adjusting the vacuum degree in the reaction kettle to 0.098Mpa, controlling the temperature to 200-260 ℃, and carrying out secondary reaction on the dehydrated oligomer;
c3. and (3) crystallization and suction filtration: and (3) refluxing and dissolving the reacted crystal by acetone, cooling to room temperature, precipitating by distilled water to realize recrystallization, and filtering the crystal to obtain the degradation material.
As a preferred embodiment of the present invention, the catalyst is sodium carbonate.
Compared with the prior art, the invention has the beneficial effects that:
the degradable material is prepared by combining a starch material, a fiber material, a biological filler, a polymer material and an auxiliary reagent and by a preparation method of mixing, fermenting and polymerizing, the toughness and the ductility of the prepared degradable material can be effectively improved by adding the fiber material and the biological filler, the using effect of the product is enhanced after the product is prepared, and meanwhile, the preparation process is simple and rapid, and the preparation efficiency of the degradable material can be improved.
Drawings
FIG. 1 is a flow chart of the preparation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 one
Referring to fig. 1, the present invention provides a technical solution:
a method for preparing a biodegradable material comprises the following materials in parts by weight: the biological agent comprises, by mass, 10 parts of a starch material, 5 parts of a fiber material, 7 parts of a biological filler, 10 parts of a polymer material and 8 parts of an auxiliary agent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch to the soybean starch to the wheat starch is 1: 1.3: the fiber material comprises plant fibers and nanocellulose, and the mass ratio of the plant fibers to the nanocellulose is 2: 1, the biological filler comprises bamboo powder and rice hull powder, wherein the mass ratio of the bamboo powder to the rice hull powder is 1: the polymer material comprises polystyrene resin, polyglycolic acid and a-hydroxy acid, wherein the mass ratio of the polystyrene resin to the polyglycolic acid to the a-hydroxy acid is 1: 1: the auxiliary reagent comprises a hydrophobic agent, a viscous agent, a catalyst, an antioxidant and a toughening agent, wherein the mass ratio of the hydrophobic agent to the viscous agent to the catalyst to the antioxidant to the toughening agent is 2: 1: 1.2: 1: 1.5.
a method for preparing a biodegradable material comprises the following preparation process:
s1, material taking;
s2, mixing;
s3, fermenting;
and S4, polymerizing.
In this embodiment, S2 includes the following steps:
a1. feeding: selecting a small and medium-sized stirring vessel, and pouring the starch material, the fiber material and the biological filler into the stirring vessel;
b1. mixing: placing a stirring vessel filled with the materials on a magnetic stirrer in a magnetic stirring mode, placing a tetrafluoro stirrer in the vessel, adding a hydrophobing agent and an antioxidant, sealing the vessel, adjusting the temperature of the vessel to be 60-70 ℃, and stirring for 20-30 min;
c1. and (3) filtering: after completion of the stirring, the stirred material is filtered through a filter cloth, thereby extracting the material.
In this embodiment, S3 includes the following steps:
a2. taking materials: pouring the extracted material into a stirrer, and adding a proper amount of water, a thickening agent and amylase;
b2. stirring: sealing the stirrer, and adjusting the temperature in the stirrer to 95-110 ℃, wherein the stirring time is 1-2 hours, so that the material is liquefied;
c2. and (3) cooling: after the materials are liquefied, the stirrer is cooled, and yeast powder is added when the temperature is reduced to 30 ℃ for fermentation.
In this embodiment, S4 includes the following steps:
a3. charging: embedding the fermented white particles into a reaction kettle, and adding polymers (polystyrene resin, polyglycolic acid and alpha-hydroxy acid), a catalyst and a toughening agent;
b3. polymerization reaction: esterification reaction is carried out, wherein the vacuum degree in a reaction kettle is 40Kpa, and the reaction is carried out at the temperature of 80-150 ℃ to obtain dehydrated oligomer; secondly, cracking reaction, adjusting the vacuum degree in the reaction kettle to 0.098Mpa, controlling the temperature to 200-260 ℃, and carrying out secondary reaction on the dehydrated oligomer;
c3. crystallization and suction filtration: and (3) refluxing and dissolving the reacted crystal by acetone, cooling to room temperature, precipitating by distilled water to realize recrystallization, and filtering the crystal to obtain the degradation material.
In this example, the catalyst was sodium carbonate.
Example two
A method for preparing a biodegradable material comprises the following materials in parts by weight: 12 parts of starch material, 6 parts of fiber material, 8 parts of biological filler, 13 parts of polymer material and 9 parts of auxiliary reagent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch to the soybean starch to the wheat starch is 1: 1.3: the fiber material comprises plant fibers and nanocellulose, and the mass ratio of the plant fibers to the nanocellulose is 2: 1, the biological filler comprises bamboo powder and rice hull powder, wherein the mass ratio of the bamboo powder to the rice hull powder is 1: the polymer material comprises polystyrene resin, polyglycolic acid and a-hydroxy acid, wherein the mass ratio of the polystyrene resin to the polyglycolic acid to the a-hydroxy acid is 1: 1: the auxiliary reagent comprises a hydrophobic agent, a viscous agent, a catalyst, an antioxidant and a toughening agent, wherein the mass ratio of the hydrophobic agent to the viscous agent to the catalyst to the antioxidant to the toughening agent is 2: 1: 1.2: 1: 1.5.
a method for preparing a biodegradable material comprises the following preparation process:
s1, material taking;
s2, mixing;
s3, fermenting;
and S4, polymerizing.
In this embodiment, S2 includes the following steps:
a1. feeding: selecting a small and medium-sized stirring vessel, and pouring the starch material, the fiber material and the biological filler into the stirring vessel;
b1. mixing: placing a stirring vessel filled with the materials on a magnetic stirrer in a magnetic stirring mode, placing a tetrafluoro stirrer in the vessel, adding a hydrophobing agent and an antioxidant, sealing the vessel, adjusting the temperature of the vessel to be 60-70 ℃, and stirring for 20-30 min;
c1. and (3) filtering: after completion of the stirring, the stirred material is filtered through a filter cloth, thereby extracting the material.
In this embodiment, S3 includes the following steps:
a2. taking materials: pouring the extracted material into a stirrer, and adding a proper amount of water, a thickening agent and amylase;
b2. stirring: sealing the stirrer, and adjusting the temperature in the stirrer to 95-110 ℃, wherein the stirring time is 1-2 hours, so that the material is liquefied;
c2. and (3) cooling: after the materials are liquefied, the stirrer is cooled, and yeast powder is added when the temperature is reduced to 30 ℃ for fermentation.
In this embodiment, S4 includes the following steps:
a3. charging: embedding the fermented white particles into a reaction kettle, and adding polymers (polystyrene resin, polyglycolic acid and alpha-hydroxy acid), a catalyst and a toughening agent;
b3. polymerization reaction: esterification reaction is carried out, wherein the vacuum degree in a reaction kettle is 40Kpa, and the reaction is carried out at the temperature of 80-150 ℃ to obtain dehydrated oligomer; secondly, cracking reaction, adjusting the vacuum degree in the reaction kettle to 0.098Mpa, controlling the temperature to 200-260 ℃, and carrying out secondary reaction on the dehydrated oligomer;
c3. and (3) crystallization and suction filtration: and (3) refluxing and dissolving the reacted crystal by acetone, cooling to room temperature, precipitating by distilled water to realize recrystallization, and filtering the crystal to obtain the degradation material.
In this example, the catalyst was sodium carbonate.
EXAMPLE III
A method for preparing a biodegradable material comprises the following materials in parts by weight: 12 parts of starch material, 6 parts of fiber material, 8 parts of biological filler, 13 parts of polymer material and 9 parts of auxiliary reagent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch to the soybean starch to the wheat starch is 1: 1.3: the fiber material comprises plant fibers and nanocellulose, and the mass ratio of the plant fibers to the nanocellulose is 2: 1, the biological filler comprises bamboo powder and rice hull powder, wherein the mass ratio of the bamboo powder to the rice hull powder is 1: the polymer material comprises polystyrene resin, polyglycolic acid and a-hydroxy acid, wherein the mass ratio of the polystyrene resin to the polyglycolic acid to the a-hydroxy acid is 1: 1: the auxiliary reagent comprises a hydrophobic agent, a viscous agent, a catalyst, an antioxidant and a toughening agent, wherein the mass ratio of the hydrophobic agent to the viscous agent to the catalyst to the antioxidant to the toughening agent is 2: 1: 1.2: 1: 1.5.
a method for preparing a biodegradable material comprises the following preparation process:
s1, material taking;
s2, mixing;
s3, fermenting;
and S4, polymerizing.
In this embodiment, S2 includes the following steps:
a1. feeding: selecting a small and medium-sized stirring vessel, and pouring the starch material, the fiber material and the biological filler into the stirring vessel;
b1. mixing: placing a stirring vessel filled with the materials on a magnetic stirrer in a magnetic stirring mode, placing a tetrafluoro stirrer in the vessel, adding a hydrophobing agent and an antioxidant, sealing the vessel, adjusting the temperature of the vessel to be 30-40 ℃, and stirring for 20-30 min;
c1. and (3) filtering: after completion of the stirring, the stirred material is filtered through a filter cloth, thereby extracting the material.
In this embodiment, S3 includes the following steps:
a2. taking materials: pouring the extracted material into a stirrer, and adding a proper amount of water, a thickening agent and amylase;
b2. stirring: sealing the stirrer, and adjusting the temperature in the stirrer to 70-85 ℃ for 1-1.5 hours to liquefy the material;
c2. and (3) cooling: after the materials are liquefied, the stirrer is cooled, and yeast powder is added when the temperature is reduced to 30 ℃ for fermentation.
In this embodiment, S4 includes the following steps:
a3. charging: embedding the fermented white particles into a reaction kettle, and adding polymers (polystyrene resin, polyglycolic acid and alpha-hydroxy acid), a catalyst and a toughening agent;
b3. polymerization reaction: esterification reaction is carried out, wherein the vacuum degree in a reaction kettle is 40Kpa, and the reaction is carried out at the temperature of 80-150 ℃ to obtain dehydrated oligomer; secondly, cracking reaction, adjusting the vacuum degree in the reaction kettle to 0.098Mpa, controlling the temperature to 200-260 ℃, and carrying out secondary reaction on the dehydrated oligomer;
c3. and (3) crystallization and suction filtration: and (3) refluxing and dissolving the reacted crystals by acetone, cooling to room temperature, precipitating by distilled water to realize recrystallization, and filtering crystals to obtain the degradable material.
In this example, the catalyst was sodium carbonate.
Example four
A method for preparing a biodegradable material comprises the following materials in parts by weight: 12 parts of starch material, 6 parts of fiber material, 8 parts of biological filler, 13 parts of polymer material and 9 parts of auxiliary reagent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch to the soybean starch to the wheat starch is 1: 1.3: the fiber material comprises plant fibers and nanocellulose, and the mass ratio of the plant fibers to the nanocellulose is 2: 1, the biological filler comprises bamboo powder and rice hull powder, wherein the mass ratio of the bamboo powder to the rice hull powder is 1: the polymer material comprises polystyrene resin, polyglycolic acid and a-hydroxy acid, wherein the mass ratio of the polystyrene resin to the polyglycolic acid to the a-hydroxy acid is 1: 1: the auxiliary reagent comprises a hydrophobic agent, a viscous agent, a catalyst, an antioxidant and a toughening agent, wherein the mass ratio of the hydrophobic agent to the viscous agent to the catalyst to the antioxidant to the toughening agent is 2: 1: 1.2: 1: 1.5.
a method for preparing a biodegradable material comprises the following preparation process:
s1, material taking;
s2, mixing;
s3, fermenting;
and S4, polymerizing.
In this embodiment, S2 includes the following steps:
a1. feeding: selecting a small and medium-sized stirring vessel, and pouring the starch material, the fiber material and the biological filler into the stirring vessel;
b1. mixing: placing a stirring vessel filled with the materials on a magnetic stirrer in a magnetic stirring mode, placing a tetrafluoro stirrer in the vessel, adding a hydrophobing agent and an antioxidant, sealing the vessel, adjusting the temperature of the vessel to be 60-70 ℃, and stirring for 20-30 min;
c1. and (3) filtering: after completion of the stirring, the stirred material is filtered through a filter cloth, thereby extracting the material.
In this embodiment, S3 includes the following steps:
a2. taking materials: pouring the extracted material into a stirrer, and adding a proper amount of water, a thickening agent and amylase;
b2. stirring: sealing the stirrer, and adjusting the temperature in the stirrer to 95-110 ℃, wherein the stirring time is 1-2 hours, so that the material is liquefied;
c2. and (3) cooling: after the materials are liquefied, the stirrer is cooled, and yeast powder is added when the temperature is reduced to 30 ℃ for fermentation.
In this embodiment, S4 includes the following steps:
a3. charging: embedding the fermented white particles into a reaction kettle, and adding polymers (polystyrene resin, polyglycolic acid and alpha-hydroxy acid), a catalyst and a toughening agent;
b3. polymerization reaction: esterification reaction is carried out, wherein the vacuum degree in a reaction kettle is 20Kpa, and the reaction is carried out at the temperature of 50-100 ℃ to obtain dehydrated oligomer; secondly, cracking reaction, adjusting the vacuum degree in the reaction kettle to 0.098Mpa, controlling the temperature to 150-200 ℃, and carrying out secondary reaction on the dehydrated oligomer;
c3. and (3) crystallization and suction filtration: and (3) refluxing and dissolving the reacted crystal by acetone, cooling to room temperature, precipitating by distilled water to realize recrystallization, and filtering the crystal to obtain the degradation material.
In this example, the catalyst was sodium carbonate.
The following are comparative analyses of the degradation efficiency and rate of examples 1-4, respectively, for the differences in the composition and preparation conditions of the materials of examples 1-4, and the comparative cases are as follows:
the comparison between the first and the second examples is as follows:
from the above table, the specific analysis is as follows:
first, the first embodiment compares with the second embodiment, the preparation conditions of the mixing, fermenting and polymerizing parts are the same, but the parts of the materials are different, and the data analysis in the table shows that the second embodiment has a slightly larger parts than the first embodiment, and under the condition of unchanged preparation conditions, the concentration and the proportion of the second embodiment are analytically obtained, so that the molecular density of the degradable material prepared by the second embodiment is higher than that of the first embodiment, the degradation efficiency of the degradable material is slightly higher than that of the first embodiment, but the degradation rate is not greatly different.
② in the second embodiment compared with the third embodiment, the preparation conditions of the material-taking and polymerization parts are the same, and the preparation conditions in the mixing and fermentation are different, through the analysis of data in the table, the temperature of mixing and stirring and the temperature and time of fermentation in the third example are lower than those in the second example, analysis can show that the uniformity and the sufficiency of the materials in the mixing process of the second embodiment are higher than those of the third embodiment, meanwhile, the uniformity and the sufficiency of the fermentation of the second example are also higher than those of the third example, after the material is prepared by polymerization, the quality and the degradation efficiency of the degraded material in the second embodiment are higher than those in the third embodiment, and because the stirring in the third embodiment is insufficient, the subsequent polymerization is influenced, the incomplete polymerization reaction is caused, the prepared degradation material cannot achieve the optimal degradation effect, and the degradation rate is slower than that of the second embodiment.
Comparing the second embodiment with the fourth embodiment, under the condition that the number of the materials taken and the preparation conditions of mixing and fermentation are the same, the reaction conditions in the polymerization reaction process are different, and through data analysis in a table, the vacuum degree and the temperature of the fourth two reactions in the second embodiment are lower than those in the second embodiment.
From the above analysis, the following conclusions were drawn:
from the above conclusion analysis, the degraded materials of examples 1 to 4 were analyzed as good or bad as example one > example two > example three to example four.
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 (6)
1. A method for preparing a biodegradable material is characterized by comprising the following materials in parts by weight: 10-15 parts of starch material, 5-8 parts of fiber material, 7-10 parts of biological filler, 10-15 parts of polymer material and 8-11 parts of auxiliary reagent, wherein the starch material comprises corn starch, soybean starch and wheat starch, and the mass ratio of the corn starch, the soybean starch and the wheat starch is 1: 1.3: the fiber material comprises plant fibers and nanocellulose, and the mass ratio of the plant fibers to the nanocellulose is 2: 1, the biological filler comprises bamboo powder and rice hull powder, wherein the mass ratio of the bamboo powder to the rice hull powder is 1: the polymer material comprises polystyrene resin, polyglycolic acid and a-hydroxy acid, wherein the mass ratio of the polystyrene resin to the polyglycolic acid to the a-hydroxy acid is 1: 1: the auxiliary reagent comprises a hydrophobic agent, a viscous agent, a catalyst, an antioxidant and a toughening agent, wherein the mass ratio of the hydrophobic agent to the viscous agent to the catalyst to the antioxidant to the toughening agent is 2: 1: 1.2: 1: 1.5.
2. a method of producing a biodegradable material according to claim 1, characterized in that: the preparation method comprises the following preparation processes:
s1, material taking;
s2, mixing;
s3, fermenting;
and S4, polymerizing.
3. The method of claim 2, wherein the step S2 includes the steps of:
a1. feeding: selecting a small and medium-sized stirring vessel, and pouring the starch material, the fiber material and the biological filler into the stirring vessel;
b1. mixing: placing a stirring vessel filled with the materials on a magnetic stirrer in a magnetic stirring mode, placing a tetrafluoro stirrer in the vessel, adding a hydrophobing agent and an antioxidant, sealing the vessel, adjusting the temperature of the vessel to be 60-70 ℃, and stirring for 20-30 min;
c1. and (3) filtering: after completion of the stirring, the stirred material is filtered through a filter cloth, thereby extracting the material.
4. The method of claim 2, wherein the step S3 includes the steps of:
a2. taking materials: pouring the extracted material into a stirrer, and adding a proper amount of water, a thickening agent and amylase;
b2. stirring: sealing the stirrer, and adjusting the temperature in the stirrer to 95-110 ℃, wherein the stirring time is 1-2 hours, so that the material is liquefied;
c2. and (3) cooling: after the materials are liquefied, the stirrer is cooled, and yeast powder is added when the temperature is reduced to 30 ℃ for fermentation.
5. The method of claim 2, wherein the step S4 includes the steps of:
a3. charging: embedding the fermented white particles into a reaction kettle, and adding polymers (polystyrene resin, polyglycolic acid and alpha-hydroxy acid), a catalyst and a toughening agent;
b3. polymerization reaction: esterification reaction is carried out, wherein the vacuum degree in a reaction kettle is 40Kpa, and the reaction is carried out at the temperature of 80-150 ℃ to obtain dehydrated oligomer; secondly, cracking reaction, adjusting the vacuum degree in the reaction kettle to 0.098Mpa, controlling the temperature to 200-260 ℃, and carrying out secondary reaction on the dehydrated oligomer;
c3. and (3) crystallization and suction filtration: and (3) refluxing and dissolving the reacted crystal by acetone, cooling to room temperature, precipitating by distilled water to realize recrystallization, and filtering the crystal to obtain the degradation material.
6. A method of producing biodegradable material according to claim 5, characterized in that said catalyst is sodium carbonate.
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| CN105086393A (en) * | 2015-08-07 | 2015-11-25 | 富阳尚诺工业设计有限公司 | Plastic allowing PLA to be fully degraded and production method thereof |
| CN113201228A (en) * | 2021-06-07 | 2021-08-03 | 浙江一马新材料有限公司 | Biodegradable material and preparation method thereof |
| CN113667319A (en) * | 2021-09-14 | 2021-11-19 | 浙江晟祺实业有限公司 | Biodegradable material and preparation method thereof |
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- 2022-03-27 CN CN202210307991.2A patent/CN114835955A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448738A (en) * | 2014-11-21 | 2015-03-25 | 甘肃圣大方舟马铃薯变性淀粉有限公司 | Bio-based 3D printing material and preparation method thereof |
| CN105086393A (en) * | 2015-08-07 | 2015-11-25 | 富阳尚诺工业设计有限公司 | Plastic allowing PLA to be fully degraded and production method thereof |
| CN113201228A (en) * | 2021-06-07 | 2021-08-03 | 浙江一马新材料有限公司 | Biodegradable material and preparation method thereof |
| CN113667319A (en) * | 2021-09-14 | 2021-11-19 | 浙江晟祺实业有限公司 | Biodegradable material and preparation method thereof |
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