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Toughened polylactic acid composite material and preparation method thereof

A technology of composite materials and polylactic acid, which is applied in the field of toughened polylactic acid composite materials and its preparation, can solve the problems of poor dispersion and affecting the effect of toughening modification, etc., and achieve increased interface interaction, good rigidity and toughness balance, and good compatibility effect

Pending Publication Date: 2022-04-29
江苏尚艾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion of natural rubber in polylactic acid is not good, which affects the effect of toughening modification

Method used

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  • Toughened polylactic acid composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] A kind of toughened polylactic acid composite material, comprises the raw material of following weight portion: 93.5 parts of polylactic acid resins (FY804 produced by Anhui Fengyuan Futailai Co., Ltd.), 5 parts of epoxidized starch core-shell particles, 0.5 part of nucleating agent , Antioxidant S22251 parts.

[0025] Preparation of epoxidized starch core-shell particles: add 30g of dry maleic anhydride esterified starch to an appropriate amount of water, stir at 85°C for 20min, add 80g of butyl acrylate and fully stir for 25min, then add 1g of benzyl peroxide Add appropriate amount of water to the system slowly dropwise, after reacting for 6 hours, cool down the system to 60°C, then add 0.6g of glycidyl methacrylate and 0.15 ammonium persulfate into the system, and raise the temperature to 70°C to continue the reaction for 2h , obtained by taking out demulsification, drying and grinding.

[0026] Preparation of toughened polylactic acid composite material: the polyla...

Embodiment 2

[0028] A kind of toughening polylactic acid composite material, comprise the raw material of following weight portion: polylactic acid resin 88 parts (FY804 that Anhui Fengyuan Fu Tailai Company produces), epoxidized starch core-shell particle 10 parts, nucleating agent 1 part , Antioxidant S22251 parts.

[0029] Preparation of epoxidized starch core-shell particles: add 30g of dry maleic anhydride esterified starch to an appropriate amount of water, stir at 75°C for 15min, add 60g of butyl acrylate and fully stir for 20min, then add 0.6g of benzene peroxide Slowly add formyl to the system after adding an appropriate amount of water. After reacting for 5 hours, cool the system down to 55°C, then add 0.6g of glycidyl methacrylate and 0.15g of ammonium persulfate into the system, and raise the temperature to 65°C to continue React for 1 hour, take out and break the emulsion, dry and grind.

[0030] Preparation of toughened polylactic acid composite material: the polylactic acid...

Embodiment 3

[0032] A kind of toughened polylactic acid composite material, comprises the raw material of following weight portion: polylactic acid resin 76 parts (FY804 that Anhui Fengyuan Fu Tailai Company produces), epoxidized starch core-shell particle 20 parts, nucleating agent 2 parts , Antioxidant S22252 parts.

[0033] Preparation of epoxidized starch core-shell particles: add 30g of dry maleic anhydride esterified starch to an appropriate amount of water, stir at 90°C for 30min, add 90g of butyl acrylate and fully stir for 30min, then add 1.2g of benzene peroxide Slowly add formyl to the system after an appropriate amount of water, and after 7 hours of reaction, cool the system down to 65°C, then add 1.2g of glycidyl methacrylate and 0.3g of ammonium persulfate into the system, and raise the temperature to 75°C to continue React for 3 hours, take out the demulsification, dry and grind.

[0034] Preparation of toughened polylactic acid composite material: the polylactic acid resin...

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Abstract

The invention provides a toughened polylactic acid composite material and a preparation method thereof. The toughened polylactic acid composite material comprises the following raw materials in parts by weight: 76-93 parts of polylactic resin, 5-20 parts of epoxidized starch core-shell particles, 0.5-2 parts of a nucleating agent and 1-2 parts of an antioxidant, the epoxidized starch core-shell particles are core-shell particles prepared by grafting and copolymerizing butyl acrylate and esterified modified starch by adopting an emulsion polymerization method, and the particle size is 200-500nm. The toughened polylactic acid composite material disclosed by the invention has relatively good biodegradable characteristic, the mechanical property is improved, and relatively good rigid-tough balance is obtained.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid composite materials, and in particular relates to a toughened polylactic acid composite material and a preparation method thereof. Background technique [0002] The synthetic raw material of polylactic acid is derived from starch made from natural and renewable plant resources (such as corn), which has excellent biodegradability and can be completely degraded by microorganisms in nature after being discarded, and finally produces carbon dioxide and water. A typical example of naturally degradable, environmentally friendly materials. [0003] Polylactic acid has the advantages of high rigidity, high hardness, easy processing, and moderate performance, but it also has defects such as high brittleness, poor permeability, and high cost, which have always restricted the further application and promotion of polylactic acid. Therefore, it has become one of the research focuses in this field to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/02C08K5/20C08K5/25
CPCC08L67/04C08L2201/06C08L2205/24C08L51/02C08K5/20C08K5/25
Inventor 李青松辛文博张朕豪康兴宾
Owner 江苏尚艾新材料科技有限公司
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