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Novel PLA and preparation method thereof

A new and modified technology, which is applied in the field of new PLA and its preparation, can solve the problems such as unsatisfactory antibacterial properties, and achieve the effects of reducing white pollution, improving compatibility, and reducing surface tension

Pending Publication Date: 2020-05-29
ZHEJIANG EXPO NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antibacterial performance of the new PLA cannot meet the needs of actual use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of a kind of novel PLA that the present invention proposes, comprises the following steps:

[0027] S1: After drying the lignosulfonate, dissolve it in a NaOH solution with a concentration of 10mol / L, heat and stir in a water bath, and heat up to 70-80°C, then add epichlorohydrin and mix evenly, at 70-75°C After stirring at constant temperature and reflux for 4-6 hours, wash until the pH value is 7, and vacuum-dry at 100-110°C to obtain the material ;

[0028] S2: Mix pentaerythritol, suberic acid and polycarbonate evenly, and conduct polycondensation reaction at 150-180°C for 2-4 hours under nitrogen atmosphere to obtain the material ;

[0029] S3, to the material Add polylactic acid, linear low-density polyethylene and polyvinyl alcohol, mix well, let cool, wash until neutral, and finally separate solid-liquid to obtain the material ;

[0030] S4, the material Mix with diphenylmethane diisocyanate, calcium carbonate, bamboo fiber, pot...

Embodiment 1

[0033] A novel PLA, in parts by weight, comprising the following raw materials: 100 parts of polylactic acid, 18 parts of lignosulfonate, 6.5 parts of epichlorohydrin, 7.5 parts of modified antibacterial agent, 11 parts of linear low density polyethylene, 20 parts of polyvinyl alcohol, 6 parts of polycarbonate, 6 parts of pentaerythritol, 4.5 parts of suberic acid, 3.5 parts of diphenylmethane diisocyanate, 6.4 parts of dioctyl phthalate, 2.3 parts of silane coupling agent KH-570, 13 parts of bamboo fiber, 5.8 parts of potato starch, 4.9 parts of montmorillonite, 2.8 parts of konjac glucomannan, 5.2 parts of calcium carbonate, 3.3 parts of liquid paraffin, 5.8 parts of ethylene ethyl acrylate, 6.3 parts of glycerin, 5.8 parts of fatty acyldiethanolamine share.

[0034] The modified antibacterial agent is prepared according to the following process: 15 parts of chitin fiber, 6 parts of bamboo fiber, 6 parts of polyvinylpyrrolidone and 12 parts of deionized water are mixed evenl...

Embodiment 2

[0042] A novel PLA, in parts by weight, comprising the following raw materials: 80 parts of polylactic acid, 24 parts of lignosulfonate, 4 parts of epichlorohydrin, 10 parts of modified antibacterial agent, 8 parts of linear low density polyethylene, 25 parts of polyvinyl alcohol, 4 parts of polycarbonate, 8 parts of pentaerythritol, 3 parts of suberic acid, 5 parts of diphenylmethane diisocyanate, 4 parts of dioctyl phthalate, 3 parts of silane coupling agent KH-570, 9 parts of bamboo fiber, 8 parts of potato starch, 2 parts of montmorillonite, 5 parts of konjac glucomannan, 4 parts of calcium carbonate, 5 parts of liquid paraffin, 4 parts of ethylene ethyl acrylate, 9 parts of glycerin, 3 parts of fatty acid diethanolamine share.

[0043] The modified antibacterial agent is prepared according to the following process: 10 parts of chitin fiber, 8 parts of bamboo fiber, 3 parts of polyvinylpyrrolidone and 16 parts of deionized water are mixed uniformly by weight, and after gri...

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PUM

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Abstract

The invention discloses a novel PLA. The PLA comprises the following raw materials: polylactic acid, lignosulfonate, epichlorohydrin, a modified antibacterial agent, linear low-density polyethylene, polyvinyl alcohol, polycarbonate, pentaerythritol, octanedioic acid, diphenyl methane diisocyanate, dioctyl phthalate, a silane coupling agent KH-570, bamboo fibers, potato starch, montmorillonite, konjac glucomannan, calcium carbonate, liquid paraffin, ethylene-ethyl acrylate, glycerol and fatty acyl diethanolamine. The invention also discloses a preparation method of the novel PLA. The prepared novel PLA has an excellent antibacterial property and high mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of preparation of novel PLA, and in particular relates to a novel PLA and a preparation method thereof. Background technique [0002] Polycarbonate (PLA) is a new type of bio-based and renewable biodegradable material made from starch raw materials proposed by renewable plant resources (such as corn, cassava, etc.). Glucose is obtained through saccharification of starch raw materials, and then high-purity lactic acid is produced from glucose and certain strains of bacteria, and polycarbonate with a certain molecular weight is synthesized by chemical synthesis. It has good biodegradability. After use, it can be completely degraded by microorganisms in nature under specific conditions, and finally produces carbon dioxide and water without polluting the environment. This is very beneficial to protecting the environment and is recognized as an environmentally friendly material. [0003] The Chinese patent docum...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/00C08L23/08C08L29/04C08L69/00C08L3/02C08L97/02C08L5/02C08L5/08C08K13/02C08K5/053C08K5/092C08K3/34C08K3/26C08K5/12C08K5/5425C08K5/13
CPCC08L67/04C08L2205/035C08L2201/06C08K2003/265C08L97/005C08L23/0815C08L29/04C08L69/00C08L3/02C08L97/02C08L5/02C08L5/08C08K13/02C08K5/053C08K5/092C08K3/346C08K3/26C08K5/12C08K5/5425C08K5/13
Inventor 陈思汕陈思松蔡盛赢蔡盛克陈镇陈盛介涂丹
Owner ZHEJIANG EXPO NEW MATERIALS CO LTD
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