CN114773808A - Polylactic acid composite degradable material - Google Patents
Polylactic acid composite degradable material Download PDFInfo
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- CN114773808A CN114773808A CN202210567756.9A CN202210567756A CN114773808A CN 114773808 A CN114773808 A CN 114773808A CN 202210567756 A CN202210567756 A CN 202210567756A CN 114773808 A CN114773808 A CN 114773808A
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- polylactic acid
- degradable material
- pla
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- composite degradable
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- 239000004626 polylactic acid Substances 0.000 title claims abstract description 97
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 92
- 239000000463 material Substances 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002667 nucleating agent Substances 0.000 claims abstract description 15
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004970 Chain extender Substances 0.000 claims abstract description 13
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 8
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 229920005586 poly(adipic acid) Polymers 0.000 claims abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000000314 lubricant Substances 0.000 claims abstract description 7
- -1 polybutylene terephthalate Polymers 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 230000007062 hydrolysis Effects 0.000 claims abstract description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 24
- 238000002425 crystallisation Methods 0.000 claims description 14
- 230000008025 crystallization Effects 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 239000011787 zinc oxide Substances 0.000 claims description 12
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 8
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 claims description 6
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 6
- 229940022769 d- lactic acid Drugs 0.000 claims description 6
- 230000001737 promoting effect Effects 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 5
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 5
- 235000013824 polyphenols Nutrition 0.000 claims description 5
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 4
- CQOZJDNCADWEKH-UHFFFAOYSA-N 2-[3,3-bis(2-hydroxyphenyl)propyl]phenol Chemical compound OC1=CC=CC=C1CCC(C=1C(=CC=CC=1)O)C1=CC=CC=C1O CQOZJDNCADWEKH-UHFFFAOYSA-N 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
- 239000010456 wollastonite Substances 0.000 claims description 4
- 229910052882 wollastonite Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229920001432 poly(L-lactide) Polymers 0.000 claims description 3
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract description 4
- 229920002472 Starch Polymers 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000655 anti-hydrolysis Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920006238 degradable plastic Polymers 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OXIKLRTYAYRAOE-CMDGGOBGSA-N (e)-3-(1-benzyl-3-pyridin-3-ylpyrazol-4-yl)prop-2-enoic acid Chemical group N1=C(C=2C=NC=CC=2)C(/C=C/C(=O)O)=CN1CC1=CC=CC=C1 OXIKLRTYAYRAOE-CMDGGOBGSA-N 0.000 description 1
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229920001896 polybutyrate Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- 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
- C08L2205/24—Crystallisation aids
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 provides a polylactic acid composite degradable material which comprises the following components in percentage by mass: 30-60wt% of polylactic acid; 15-30wt% of poly (butylene adipate) or poly (butylene terephthalate); 1-8wt% of compatilizer; 0.3-2wt% of nucleating agent; 0.4-1wt% of lubricant; 10-49wt% of inorganic mineral powder; 0.3-0.9wt% of antioxidant; 0.3 to 0.9 weight percent of hydrolysis resistant agent and 0.2 to 1 weight percent of chain extender. The invention adopts polylactic acid PLA to carry out melt reaction extrusion method to graft maleic anhydride and glycidyl methacrylate as compatilizer; maleic anhydride and glycidyl methacrylate are used to simultaneously graft on segments of polylactic acid PLA to form a compatibilizer having a double reactive group, allowing organic combination of polylactic acid and poly adipic acid or polybutylene terephthalate.
Description
Technical Field
The invention relates to the technical field of degradable materials, in particular to a polylactic acid composite degradable material.
Background
The current degradable materials are generally polylactic acid, which is made from starch raw materials proposed by renewable plant resources (such as corn). The starch raw material is made into lactic acid through a fermentation process, and then is converted into polylactic acid through chemical synthesis. The biodegradable plastic has good biodegradability, can be completely degraded by microorganisms in nature after being used, finally generates carbon dioxide and water, does not pollute the environment, is very beneficial to environmental protection, and is a well-known environment-friendly material. However, polylactic acid has a remarkable defect, is mainly weak to heat, and is likely to be distorted when exposed to high temperatures. Greatly limits the use of polylactic acid materials.
In the prior art, starch compatibility improvement is generally used to fuse with poly (adipic acid) or poly (butylene terephthalate), for example, as disclosed in publication No.: "CN 102796286A" discloses a fully biodegradable material in which the compatibility of starch with PLA, PBAT is improved by a compatibilizer, which uses maleic anhydride as grafted starch, but has little effect on polylactic acid. The polylactic acid cannot be made to have better compatibility.
Disclosure of Invention
The invention aims to provide a polylactic acid composite degradable material to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a polylactic acid composite degradable material comprises the following components in percentage by mass:
30-60wt% of polylactic acid;
15-30wt% of poly (butylene adipate) or poly (butylene terephthalate);
1-8wt% of compatilizer;
0.3-2wt% of nucleating agent;
0.4-1wt% of lubricant;
10-49wt% of inorganic mineral powder;
0.3 to 0.9 weight percent of antioxidant;
0.3-0.9wt% of hydrolysis resistant agent;
the chain extender is 0.2-1 wt%.
Preferably, the polylactic acid is a blend of poly-L-lactic acid and poly-D-lactic acid, wherein the proportion of the poly-D-lactic acid is not less than 50% by mass percent.
Preferably, the polylactic acid has an average molecular weight of 20 to 40 ten thousand.
Preferably, the compatibilizer is a graft of polylactic acid PLA with maleic anhydride and glycidyl methacrylate for simultaneous grafting on segments of the polylactic acid PLA to form a compatibilizer having dual active groups.
Preferably, the nucleating agent is one or two of nano zinc oxide and nano aluminum oxide;
wherein the nucleating agent acts as a catalyst.
Preferably, the inorganic mineral powder is one or a combination of more of 2000-10000 mesh talcum powder, 5000-10000 mesh barium sulfate and 2000-10000 mesh wollastonite.
Preferably, the antioxidant comprises one of triphenol, polyphenol, hydroquinone, diphenylamine and p-phenylenediamine.
Preferably, the nucleating agent is used for promoting the reaction of the PLA open chain and the chain extender, and promoting the crystallization of the PLA during the crystallization of the PLA.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts polylactic acid PLA to carry out melt reaction extrusion method to graft maleic anhydride and glycidyl methacrylate as compatilizer; maleic anhydride and glycidyl methacrylate are used to simultaneously graft on segments of polylactic acid PLA to form a compatibilizer having a double active group, allowing organic combination of polylactic acid and poly adipic acid or polybutylene terephthalate.
The invention adopts one or the combination of nano zinc oxide and nano aluminum oxide as nucleating agent, which has three functions, in PLA crystallization, the nano zinc oxide and the nano aluminum oxide can reduce the free energy on the molecular chain surface of the polylactic acid surface, and in the crystallization stage, the crystallization can be realized at higher temperature, and the crystallization is promoted. Secondly, the polylactic acid is used as a catalyst to promote the reaction of PLA open chain and chain extender, and the fusion of polylactic acid is enhanced. And as an inorganic molecule, the nano zinc oxide and the nano aluminum oxide have the characteristics of large surface area of nano particles and more surface active centers, so that the nano zinc oxide and the nano aluminum oxide are easy to capture free radicals generated in the process of fusing the polylactic acid with the poly adipic acid or the polybutylene terephthalate and prevent the polylactic acid from being oxidized.
Detailed Description
The present invention will be described in detail with reference to examples.
A polylactic acid composite degradable material comprises the following components in percentage by mass:
30-60wt% of polylactic acid;
15-30wt% of poly (butylene adipate) or poly (butylene terephthalate);
1-8wt% of compatilizer;
0.3-2wt% of nucleating agent;
0.4-1wt% of lubricant;
10-49wt% of inorganic mineral powder;
0.3 to 0.9 weight percent of antioxidant;
0.3 to 0.9 weight percent of hydrolysis resistant agent;
the chain extender is 0.2-1 wt%.
Preferably, the polylactic acid is a blend of poly-L-lactic acid and poly-D-lactic acid, wherein the proportion of the poly-D-lactic acid is not less than 50% by mass percent.
Preferably, the polylactic acid has an average molecular weight of 20 to 40 ten thousand.
Preferably, the compatibilizer is a graft of polylactic acid PLA with maleic anhydride and glycidyl methacrylate for simultaneous grafting on segments of the polylactic acid PLA to form a compatibilizer having a double reactive group.
Preferably, the nucleating agent is one or two of nano zinc oxide and nano aluminum oxide;
wherein the nucleating agent acts as a catalyst.
Preferably, the inorganic mineral powder is one or a combination of more of 2000-10000 meshes of talcum powder, 5000-10000 meshes of barium sulfate and 2000-10000 meshes of wollastonite.
Preferably, the antioxidant comprises one of triphenol, polyphenol, hydroquinone, diphenylamine and p-phenylenediamine.
Preferably, the nucleating agent is used for promoting the reaction of the PLA open chain and the chain extender, and promoting the crystallization of the PLA during the crystallization of the PLA.
The invention adopts PLA to carry out melt reaction extrusion method to graft maleic anhydride and glycidyl methacrylate as compatilizer; maleic anhydride and glycidyl methacrylate are used to simultaneously graft on segments of polylactic acid PLA to form a compatibilizer having a double reactive group, allowing organic combination of polylactic acid and poly adipic acid or polybutylene terephthalate.
The invention adopts one or the combination of nano zinc oxide and nano aluminum oxide as nucleating agent, which has three functions, in PLA crystallization, the nano zinc oxide and the nano aluminum oxide can reduce the free energy on the molecular chain surface of the polylactic acid surface, and in the crystallization stage, the crystallization can be realized at higher temperature, and the crystallization is promoted. Secondly, the polylactic acid is used as a catalyst to promote the reaction of PLA open chain and chain extender, and the fusion of polylactic acid is enhanced. And as an inorganic molecule, the nano zinc oxide and the nano aluminum oxide have the characteristics of large surface area of nano particles and more surface active centers, so that the nano zinc oxide and the nano aluminum oxide are easy to capture free radicals generated in the process of fusing the polylactic acid with the poly adipic acid or the polybutylene terephthalate and prevent the polylactic acid from being oxidized.
Example 1
The high-temperature-resistant polylactic acid composite degradable material comprises the following components in parts by weight: 40 parts of polylactic acid, 25 parts of poly (butylene adipate)/terephthalate), 3 parts of graft of polylactic acid (PLA), maleic anhydride and glycidyl methacrylate, 0.4 part of nano zinc oxide, 0.8 part of lubricant (brand number RF-8), 30 parts of 10000-mesh talcum powder, 0.3 part of polyphenol, 0.3 part of anti-hydrolysis agent and 0.2 part of chain extender.
Example 2
The high-temperature-resistant polylactic acid composite degradable material comprises the following components in parts by weight: 30 parts of polylactic acid, 30 parts of polybutylene adipate/terephthalate, 3 parts of graft of polylactic acid PLA, maleic anhydride and glycidyl methacrylate, 0.3 part of nano aluminum oxide, 0.8 part of lubricant (brand number RF-8), 10000-mesh barium sulfate, 0.4 part of trisphenol, 0.3 part of anti-hydrolysis agent and 0.2 part of chain extender.
Example 3
The high-temperature-resistant polylactic acid composite degradable material comprises the following components in parts by weight: 29 parts of polylactic acid, 29 parts of poly (butylene adipate)/terephthalate), 3 parts of graft of polylactic acid (PLA), maleic anhydride and glycidyl methacrylate, 0.5 part of nano-alumina, 0.8 part of lubricant (brand number RF-8), 40 parts of 2000-10000 mesh wollastonite, 0.4 part of antioxidant, 0.3 part of hydrolysis resistant agent and 0.2 part of chain extender.
The heat resistance of the high temperature resistant polylactic acid composite degradable material described in the examples 1 to 3 and the polylactic acid of the comparative example are detected by a vicat heat resistance test, and the results are shown in table 1, it can be seen that the comparative example deforms at 55 ℃, while the high temperature resistant polylactic acid composite degradable material in the examples 1 and 2 deforms at 85 ℃ and 90 ℃ respectively, and the high temperature resistant degradable plastic material in the example 3 deforms at 110 ℃, which indicates that the high temperature resistant degradable plastic material disclosed by the present disclosure has good high temperature resistance, and the heat deformation temperature can reach 90-110 ℃. The main reason is that the invention adopts polylactic acid PLA to carry out melt reaction extrusion method to graft maleic anhydride and glycidyl methacrylate as compatilizer; maleic anhydride and glycidyl methacrylate are used for simultaneously grafting on a chain segment of polylactic acid (PLA) to form a compatilizer with double active groups, so that the polylactic acid and the poly adipic acid or the butylene terephthalate are organically combined, and the high-temperature-resistant deformation performance of the polylactic acid is enhanced.
In examples 1 to 3, the difference in the results obtained by replacing the triphenol and the polyphenol with the benzenediol, the diphenylamine and the p-phenylenediamine was not so great, and the hydrolysis resistant agent and the chain extender were commonly used, which is not described in the present invention.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, or combinations, or other applications of the inventive concepts and solutions as may be employed without such modifications, are intended to be included within the scope of the present invention.
Claims (8)
1. The polylactic acid composite degradable material is characterized by comprising the following components in percentage by mass:
30-60wt% of polylactic acid;
15-30wt% of poly (adipic acid) or polybutylene terephthalate;
1-8wt% of compatilizer;
0.3-2wt% of nucleating agent;
0.4-1wt% of lubricant;
10-49wt% of inorganic mineral powder;
0.3 to 0.9 weight percent of antioxidant;
0.3-0.9wt% of hydrolysis resistant agent;
the chain extender is 0.2-1 wt%.
2. The polylactic acid composite degradable material according to claim 1, wherein the polylactic acid is a blend of poly-L-lactic acid and poly-D-lactic acid, wherein the proportion of poly-D-lactic acid is not less than 50% by mass.
3. The polylactic acid composite degradable material according to claim 1 or 2, wherein the average molecular weight of the polylactic acid is 20-40 ten thousand.
4. The polylactic acid composite degradable material according to claim 1, wherein the compatibilizer is a graft of polylactic acid (PLA) and maleic anhydride and glycidyl methacrylate for simultaneous grafting on a segment of the polylactic acid (PLA) to form the compatibilizer having a double reactive group.
5. The polylactic acid composite degradable material of claim 1, wherein the nucleating agent is one or two of nano zinc oxide and nano aluminum oxide;
wherein the nucleating agent acts as a catalyst.
6. The polylactic acid composite degradable material as claimed in claim 1, wherein the inorganic mineral powder is selected from one or more of 2000-10000 mesh talcum powder, 5000-10000 mesh barium sulfate and 2000-10000 mesh wollastonite.
7. The polylactic acid composite degradable material of claim 1, wherein the antioxidant comprises one of triphenol, polyphenol, hydroquinone, diphenylamine and p-phenylenediamine.
8. The polylactic acid composite degradable material according to claim 5, wherein the nucleating agent is used for promoting the reaction of PLA open chain and the chain extender, and promoting the crystallization of PLA during the crystallization of PLA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210567756.9A CN114773808A (en) | 2022-05-24 | 2022-05-24 | Polylactic acid composite degradable material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210567756.9A CN114773808A (en) | 2022-05-24 | 2022-05-24 | Polylactic acid composite degradable material |
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| CN114773808A true CN114773808A (en) | 2022-07-22 |
Family
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| CN202210567756.9A Pending CN114773808A (en) | 2022-05-24 | 2022-05-24 | Polylactic acid composite degradable material |
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Citations (6)
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|---|---|---|---|---|
| KR20110108736A (en) * | 2010-03-29 | 2011-10-06 | 주식회사 삼양사 | Environmentally friendly resin composition |
| US20120184672A1 (en) * | 2011-01-14 | 2012-07-19 | Teknor Apex Company | Poly (lactic-acid) resin compositions |
| CN104530666A (en) * | 2014-12-08 | 2015-04-22 | 安徽聚美生物科技有限公司 | High-temperature-resistant polylactic acid degradable material, high-temperature-resistant polylactic acid injection molded tableware, and preparation methods thereof |
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