CN114479387A - Environment-friendly degradable plastic and preparation method thereof - Google Patents
Environment-friendly degradable plastic and preparation method thereof Download PDFInfo
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- CN114479387A CN114479387A CN202210270676.7A CN202210270676A CN114479387A CN 114479387 A CN114479387 A CN 114479387A CN 202210270676 A CN202210270676 A CN 202210270676A CN 114479387 A CN114479387 A CN 114479387A
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- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 9
- -1 polybutylene adipate terephthalate Polymers 0.000 claims abstract description 51
- 239000004629 polybutylene adipate terephthalate Substances 0.000 claims abstract description 28
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004611 light stabiliser Substances 0.000 claims abstract description 20
- 229920005610 lignin Polymers 0.000 claims abstract description 20
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 20
- 229920000379 polypropylene carbonate Polymers 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- QORUGOXNWQUALA-UHFFFAOYSA-N N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 Chemical compound N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 QORUGOXNWQUALA-UHFFFAOYSA-N 0.000 claims description 4
- 229930003427 Vitamin E Natural products 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 4
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 4
- 229940046009 vitamin E Drugs 0.000 claims description 4
- 235000019165 vitamin E Nutrition 0.000 claims description 4
- 239000011709 vitamin E Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 3
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 abstract description 3
- 238000009264 composting Methods 0.000 abstract description 3
- 239000012752 auxiliary agent Substances 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920002472 Starch Polymers 0.000 description 3
- 229920000704 biodegradable plastic Polymers 0.000 description 3
- 229910017059 organic montmorillonite Inorganic materials 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 239000004626 polylactic acid Substances 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920000954 Polyglycolide Polymers 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 description 2
- 239000004631 polybutylene succinate Substances 0.000 description 2
- 229920002961 polybutylene succinate Polymers 0.000 description 2
- 229920001610 polycaprolactone Polymers 0.000 description 2
- 239000004632 polycaprolactone Substances 0.000 description 2
- 239000004633 polyglycolic acid Substances 0.000 description 2
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance 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
-
- 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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an environment-friendly degradable plastic and a preparation method thereof, wherein the degradable plastic comprises the following components in parts by weight: 55-70 parts of polybutylene adipate terephthalate, 10-20 parts of polypropylene carbonate, 10-15 parts of modified lignin, 5-6 parts of montmorillonite, 3-4 parts of a compatibilizer, 0-1 part of a lubricant and 0-1 part of a light stabilizer. The invention belongs to green environment-friendly materials, the main raw materials are degradable materials, the auxiliary agents are all nontoxic and harmless and are environment-friendly, the degradable plastic can be completely degraded under the composting condition, the environment-friendly degradable plastic provided by the invention belongs to blending type degradable plastic, and the modified materials such as polypropylene carbonate, modified lignin and montmorillonite are doped, so that the thermal stability, the gas barrier property, the breaking strength and the elasticity of the pure polybutylene adipate terephthalate material are improved, the comprehensiveness of the polybutylene adipate terephthalate material is greatly improved, and the polybutylene adipate terephthalate material can be applied to various use occasions.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to an environment-friendly degradable plastic and a preparation method thereof.
Background
Since the last 50 s, with the rapid development of petrochemical industry, plastic products are widely applied to various industries such as medical treatment, agriculture, packaging, automobiles, buildings and the like due to the advantages of low price, light weight, easy carrying, large performance regulation range and the like. However, the plastic products bring great convenience to the life of people and bring irreparable harm to the environment.
Degradable plastics can be divided into three main categories according to raw material sources: natural degradable plastics containing starch, cellulose, gelatin and other substances; the biodegradable plastic comprises biodegradable plastic containing polyhydroxy fatty acid esters (PHA), polylactic acid (PLA), polybutylene succinate (PBS) and other materials, and petroleum-based biodegradable plastic containing Polycaprolactone (PCL), carbon dioxide-based copolymer (PPC), polybutylene terephthalate (PBAT) and other main components. The mainstream degradable plastic materials at present are starch-based degradable materials, polylactic acid (PLA) and polybutylene terephthalate adipate (PBAT). The main degradation modes include biodegradation, photodegradation, photo-biodegradation and thermal degradation.
Since the 70's of the last century till now, degradable plastics have been developed in a leap way and many varieties have been produced industrially and are widely used, but some problems still remain to be solved. Firstly, the properties of degradable plastics are generally not as good as those of common plastics, such as starch plastics, which have poor mechanical properties, water resistance, mechanical properties and printing properties; polylactic acid (PLA) has poor toughness, lacks elasticity and flexibility, and has general gas barrier property; polyglycolic acid (PGA) has low toughness, general gloss and poor stability; polyhydroxyalkanoates (PHAs) are highly crystalline, brittle, less thermally stable, and the like. And secondly, the manufacturing cost of the degradable plastic is higher than that of the common plastic. Therefore, the degradable plastics need further research and development.
Disclosure of Invention
In view of the above, the present invention provides an environment-friendly degradable plastic and a preparation method thereof, which can improve the problem of poor mechanical properties of the existing degradable plastic while ensuring the degradation rate.
In order to solve the problems, the invention provides an environment-friendly degradable plastic and a preparation method thereof, wherein the degradable plastic comprises the following components in parts by weight: 55-70 parts of polybutylene adipate terephthalate, 10-20 parts of polypropylene carbonate, 10-15 parts of modified lignin, 5-6 parts of montmorillonite, 3-4 parts of a compatibilizer, 0-1 part of a lubricant and 0-1 part of a light stabilizer.
Further, the polybutylene adipate terephthalate has the number average molecular weight Mn of 4.26 multiplied by 104g/mol, polydispersity index 2.41.
Further, therein areThe polypropylene carbonate has a number average molecular weight Mn of 5.87X 104g/mol, polydispersity index 3.65.
Further, the modified lignin can be any one of dealkalized lignin, sodium lignosulfonate and calcium lignosulfonate.
Further, the montmorillonite can be any one of organic montmorillonite, sodium montmorillonite and calcium montmorillonite
Further, the compatibilizer can be one or more of triphenylmethane triisocyanate, stearic acid monoglyceride, ethylene-methyl acrylate-glycidyl methacrylate copolymer and maleic anhydride grafted polybutylene adipate-terephthalate copolymer.
Further, wherein the lubricant is glycerol and the purity is analytical grade.
Further, the light stabilizer can be one of or a combination of a hindered amine light stabilizer and vitamin E.
In order to realize the purpose, the invention also provides a preparation method of the environment-friendly degradable plastic, which comprises the following steps:
(1) drying polybutylene adipate terephthalate serving as a raw material in a vacuum drying box at 60 ℃ for 8 hours, and drying polypropylene carbonate in a vacuum drying box at 40 ℃ for 12 hours to remove trace water in the raw material;
(2) mixing polybutylene adipate-terephthalate, polypropylene carbonate, modified lignin, montmorillonite, a compatibilizer, a lubricant and a light stabilizer according to the formula amount, and stirring at a high speed of 800-1200 r/min for 20-40 min to obtain a uniformly dispersed mixture;
(3) adding the mixture obtained in the step (2) into a conical counter-rotating double-screw extruder for melt extrusion, wherein the melting temperature is set to 150 ℃ for extrusion molding, the temperature of a die head is set to 140 ℃, and the rotating speed of screws is set to 50 r/min;
(4) and (4) granulating the material obtained after the melt extrusion in the step (3) by using a high-speed granulator, wherein the traction speed is 3-5 m/min, so as to obtain the environment-friendly degradable plastic granules.
The invention has the following beneficial effects: the invention belongs to a green environment-friendly material, the main raw materials are degradable materials, the auxiliary agents are nontoxic, harmless and environment-friendly, and the degradable plastic can be fully degraded under the composting condition. The environment-friendly degradable plastic provided by the invention belongs to blended degradable plastic, and the modified materials of polypropylene carbonate, modified lignin and montmorillonite are doped, so that the thermal stability, gas barrier property, breaking strength and elasticity of the pure polybutylene adipate terephthalate material are improved, the comprehensive performance of the polybutylene adipate terephthalate material is greatly improved, and the polybutylene adipate terephthalate material can be applied to various use occasions.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.
The invention provides an environment-friendly degradable plastic and a preparation method thereof, wherein the degradable plastic comprises the following components in parts by weight: 55-70 parts of polybutylene adipate terephthalate, 10-20 parts of polypropylene carbonate, 10-15 parts of modified lignin, 5-6 parts of montmorillonite, 3-4 parts of a compatibilizer, 0-1 part of a lubricant and 0-1 part of a light stabilizer; the preferable weight ratio is as follows: 65 parts of polybutylene adipate terephthalate, 15 parts of polypropylene carbonate, 10 parts of modified lignin, 5 parts of montmorillonite, 3 parts of a compatibilizer, 1 part of a lubricant and 1 part of a light stabilizer, so that the comprehensive performance of the degradable plastic is good after optimization.
In some embodiments of the invention, the polybutylene adipate-terephthalate has a number average molecular weight Mn of 4.26X 104g/mol, polydispersity index 2.41; the number average molecular weight Mn of the polypropylene carbonate is 5.87 multiplied by 104g/mol, polydispersity index 3.65.
In some embodiments of the present invention, the modified lignin can be any one of dealkalized lignin, sodium lignosulfonate and calcium lignosulfonate, and preferably the modified lignin is sodium lignosulfonate, so that the degradable plastic has a good degradation rate after being preferred.
In some embodiments of the present invention, the montmorillonite may be any one of organic montmorillonite, sodium-based montmorillonite and calcium-based montmorillonite, and the preferred montmorillonite is organic montmorillonite, so that the montmorillonite has good compatibility with other raw materials and is favorable for dispersion in resin after being preferred.
In some embodiments of the present invention, the compatibilizer can be any one or more of triphenylmethane triisocyanate, stearic acid monoglyceride, ethylene-methyl acrylate-glycidyl methacrylate copolymer, and maleic anhydride grafted polybutylene adipate terephthalate copolymer, and the preferred compatibilizer is maleic anhydride grafted polybutylene adipate terephthalate copolymer, so that the amount of the compatibilizer is preferably reduced.
In some embodiments of the invention, the lubricant is glycerol and the purity is analytical grade.
In some embodiments of the present invention, the light stabilizer may be one of or a combination of a hindered amine light stabilizer and vitamin E, and the preferred light stabilizer is a combination of a hindered amine light stabilizer and vitamin E, so that the light stability of the degradable plastic is obviously improved after the preferred light stabilizer is used.
The invention also provides a preparation method of the environment-friendly degradable plastic, which comprises the following steps:
(1) drying polybutylene adipate terephthalate serving as a raw material in a vacuum drying box at 60 ℃ for 8 hours, and drying polypropylene carbonate in a vacuum drying box at 40 ℃ for 12 hours to remove trace water in the raw material;
(2) mixing polybutylene adipate-terephthalate, polypropylene carbonate, modified lignin, montmorillonite, a compatibilizer, a lubricant and a light stabilizer according to the formula amount, and stirring at a high speed of 800-1200 r/min for 20-40 min to obtain a uniformly dispersed mixture;
(3) adding the mixture obtained in the step (2) into a conical counter-rotating double-screw extruder for melt extrusion, wherein the melting temperature is respectively 150 ℃ for extrusion molding, 140 ℃ for die head and 50r/min for screw rotation speed;
(4) granulating the material obtained after the melt extrusion in the step (3) by using a high-speed granulator, wherein the traction speed is 3-5 m/min, so as to obtain environment-friendly degradable plastic granules; the drawing speed is preferably 4m/min, so that the drawing speed after the optimization is moderate and the quality of the granules is stable.
The environment-friendly degradable plastic disclosed by the invention can be fully degraded under a composting condition, has the advantages of good mechanical property, environmental friendliness, high degradation speed and the like, and can be widely applied to various use occasions.
The following is a further description with reference to specific examples.
Example 1
The raw materials of the environment-friendly degradable plastic comprise the following components in parts by weight:
55 parts of polybutylene adipate terephthalate, 20 parts of polypropylene carbonate, 15 parts of modified lignin, 5 parts of montmorillonite, 3 parts of a compatibilizer, 1 part of a lubricant and 1 part of a light stabilizer.
Example 2
The environment-friendly degradable plastic comprises the following components in parts by weight:
65 parts of polybutylene adipate terephthalate, 15 parts of polypropylene carbonate, 10 parts of modified lignin, 5 parts of montmorillonite, 3 parts of a compatibilizer, 1 part of a lubricant and 1 part of a light stabilizer.
Example 3
The environment-friendly degradable plastic comprises the following components in parts by weight:
70 parts of polybutylene adipate terephthalate, 10 parts of polypropylene carbonate, 10 parts of modified lignin, 6 parts of montmorillonite, 3 parts of a compatibilizer, 0.5 part of a lubricant and 0.5 part of a light stabilizer.
Claims (9)
1. The environment-friendly degradable plastic is characterized by comprising the following components in parts by weight: 55-70 parts of polybutylene adipate terephthalate, 10-20 parts of polypropylene carbonate, 10-15 parts of modified lignin, 5-6 parts of montmorillonite, 3-4 parts of a compatibilizer, 0-1 part of a lubricant and 0-1 part of a light stabilizer.
2. The environment-friendly degradable plastic according to claim 1, wherein: the polybutylene adipate terephthalate used in the degradable plastic has the number average molecular weight Mn of 4.26 multiplied by 104g/mol and the polydispersity index of 2.41.
3. The environment-friendly degradable plastic according to claim 1, wherein: the number average molecular weight Mn of the polypropylene carbonate used in the degradable plastic is 5.87 multiplied by 104g/mol, and the polydispersity index is 3.65.
4. The environment-friendly degradable plastic according to claim 1, wherein: the modified lignin used in the degradable plastic can be any one of dealkalized lignin, sodium lignosulfonate and calcium lignosulfonate.
5. The environment-friendly degradable plastic according to claim 1, wherein: the compatibilizer used in the degradable plastic can be one or more of triphenylmethane triisocyanate, stearic acid monoglyceride, ethylene-methyl acrylate-glycidyl methacrylate copolymer and maleic anhydride grafted polybutylene adipate-terephthalate copolymer.
6. The environment-friendly degradable plastic according to claim 1, wherein: the compatibilizer used in the degradable plastic can be one or more of triphenylmethane triisocyanate, stearic acid monoglyceride, ethylene-methyl acrylate-glycidyl methacrylate copolymer and maleic anhydride grafted polybutylene adipate-terephthalate copolymer.
7. The environment-friendly degradable plastic according to claim 1, wherein: the lubricant used in the degradable plastic is glycerol.
8. The environment-friendly degradable plastic according to claim 1, wherein: the light stabilizer used in the degradable plastic can be one of hindered amine light stabilizer and vitamin E or used in combination.
9. The method for preparing environment-friendly degradable plastic according to any one of claims 1-8, wherein the method comprises the following steps:
(1) drying polybutylene adipate terephthalate serving as a raw material in a vacuum drying box at 60 ℃ for 8 hours, and drying polypropylene carbonate in a vacuum drying box at 40 ℃ for 12 hours to remove trace water in the raw material;
(2) mixing polybutylene adipate-terephthalate, polypropylene carbonate, modified lignin, montmorillonite, a compatibilizer, a lubricant and a light stabilizer according to the formula amount, and stirring at a high speed of 800-1200 r/min for 20-40 min to obtain a uniformly dispersed mixture;
(3) adding the mixture obtained in the step (2) into a conical counter-rotating double-screw extruder for melt extrusion, wherein the melting temperature is set to 150 ℃ for extrusion molding, the temperature of a die head is set to 140 ℃, and the rotating speed of screws is set to 50 r/min;
(4) and (4) granulating the material obtained after the melt extrusion in the step (3) by using a high-speed granulator, wherein the traction speed is 3-5 m/min, so as to obtain the environment-friendly degradable plastic granules.
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| CN202210270676.7A CN114479387A (en) | 2022-03-18 | 2022-03-18 | Environment-friendly degradable plastic and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210270676.7A CN114479387A (en) | 2022-03-18 | 2022-03-18 | Environment-friendly degradable plastic and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130172434A1 (en) * | 2011-12-30 | 2013-07-04 | Sk Global Chemical Co., Ltd. | Method for preparing resin composition for expandable polypropylene carbonate and expandable polypropylene carbonate prepared therefrom |
| CN106832801A (en) * | 2016-12-21 | 2017-06-13 | 济宁明升新材料有限公司 | A kind of lignin modification PBAT biodegradable plastics and preparation method thereof |
| CN109181247A (en) * | 2018-08-31 | 2019-01-11 | 南京工业大学 | Modified lignin composite biodegradable film and preparation method thereof |
| CN113321919A (en) * | 2021-07-14 | 2021-08-31 | 南京尚阳机电科技有限公司 | Preparation method of degradable plastic |
-
2022
- 2022-03-18 CN CN202210270676.7A patent/CN114479387A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130172434A1 (en) * | 2011-12-30 | 2013-07-04 | Sk Global Chemical Co., Ltd. | Method for preparing resin composition for expandable polypropylene carbonate and expandable polypropylene carbonate prepared therefrom |
| CN106832801A (en) * | 2016-12-21 | 2017-06-13 | 济宁明升新材料有限公司 | A kind of lignin modification PBAT biodegradable plastics and preparation method thereof |
| CN109181247A (en) * | 2018-08-31 | 2019-01-11 | 南京工业大学 | Modified lignin composite biodegradable film and preparation method thereof |
| CN113321919A (en) * | 2021-07-14 | 2021-08-31 | 南京尚阳机电科技有限公司 | Preparation method of degradable plastic |
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