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Hypophosphite modified polylactic acid composite material and preparation method thereof

A composite material and hypophosphite technology, applied in the field of packaging materials, can solve the problems of poor flame retardant performance, restricted application, dripping, etc., and achieve the effects of not easy migration, good flame retardancy and good compatibility

Inactive Publication Date: 2017-09-22
苏州奥宇包装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since polylactic acid is an aliphatic polyester, its flame retardancy is poor, and there is obvious dripping phenomenon during combustion.
The above shortcomings seriously restrict its application in the fields of home appliances, automobiles, electronics, etc. Therefore, it is necessary to modify polylactic acid materials to improve their flame retardancy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A hypophosphite modified polylactic acid composite material, which comprises the following components in parts by weight: 12 parts of sodium hypophosphite, 5 parts of calcium hypophosphite, 3 parts of aluminum hypophosphite, 2 parts of graphene, 3 parts of hemp fiber, 2 parts of cotton fiber, 1 part of palm fiber, 6 parts of silicon carbide, 25 parts of polylactic acid.

[0021] The preparation method of described a kind of hypophosphite modified polylactic acid composite material, comprises the following steps:

[0022] (1) adopt mass fraction to be 13% sodium bicarbonate aqueous solution process kenaf fiber, cotton fiber and palm fiber, react 2 hours;

[0023] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum drying oven for 1 hour to obtain a fiber powder, wherein the vacuum degree is -0.2Pa, and the temperature is 70 ℃;

[0024] (3) Treat the fiber powder with a sodium hydroxide solution with a mass fra...

Embodiment 2

[0028] A hypophosphite modified polylactic acid composite material, the composite material comprises the following components in parts by weight: 17 parts of sodium hypophosphite, 13 parts of calcium hypophosphite, 7 parts of aluminum hypophosphite, 6 parts of graphene, 14 parts of hemp fiber, 7 parts of cotton fiber, 5 parts of palm fiber, 15 parts of silicon carbide, and 43 parts of polylactic acid.

[0029] The preparation method of described a kind of hypophosphite modified polylactic acid composite material, comprises the following steps:

[0030] (1) adopt mass fraction to be 23% sodium bicarbonate aqueous solution process kenaf fiber, cotton fiber and palm fiber, react 4 hours;

[0031] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum oven for 2 hours to obtain a fiber powder, wherein the vacuum degree is -0.1Pa, and the temperature is 78 ℃;

[0032] (3) The fiber powder is treated with a sodium hydroxide ...

Embodiment 3

[0036] A hypophosphite modified polylactic acid composite material, in parts by weight, the composite material comprises the following components: 22 parts of sodium hypophosphite, 16 parts of calcium hypophosphite, 11 parts of aluminum hypophosphite, 11 parts of graphene, 18 parts of hemp fiber, 9 parts of cotton fiber, 8 parts of palm fiber, 18 parts of silicon carbide, and 48 parts of polylactic acid.

[0037] The preparation method of described a kind of hypophosphite modified polylactic acid composite material, comprises the following steps:

[0038] (1) adopt mass fraction to be 26% sodium bicarbonate aqueous solution process kenaf fiber, cotton fiber and palm fiber, react 4.5 hours;

[0039] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum oven for 3 hours to obtain a fiber powder, wherein the vacuum degree is -0.1Pa, and the temperature is 85 ℃;

[0040] (3) Treat the fiber powder with a sodium hydroxide ...

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PUM

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Abstract

The invention discloses a hypophosphite modified polylactic acid composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 12-22 parts of sodium hypophosphite, 5-16 parts of calcium hypophosphite, 3-11 parts of aluminum hypophosphite, 2-11 parts of graphene, 3-18 parts of kenaf fibers, 2-9 parts of cotton fibers, 1-8 parts of palm fibers, 6-18 parts of silicon carbide and 25-48 parts of polylactic acid. The hypophosphite modified polylactic acid composite material has the advantages that: firstly, the hypophosphite modified polylactic acid composite material is good in flame resistance, and is free of a dripping phenomenon during combustion; secondly, the composite material is free of halogen release after being combusted, and is environmentally friendly; and thirdly, the composite material is good in compatibility with a flame-resistant material in a using process, is not liable to migrate, and has enough thermal stability.

Description

technical field [0001] The invention belongs to the field of packaging materials, and relates to a polylactic acid packaging material, in particular to a hypophosphite modified polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid is a polymer made of starch from crops such as corn and potatoes, which is fermented into polylactic acid and then polymerized. Polylactic acid has excellent mechanical properties, biocompatibility, optical properties, processing properties, and thermal stability. At the same time, polylactic acid can be completely biodegraded to generate carbon dioxide and water, forming a virtuous circle from nature and returning to nature. [0003] Due to the excellent performance of polylactic acid, it is recognized as a biodegradable polymer that can replace traditional petroleum-based polymers to a certain extent, and may be widely used in many fields such as home appliances, automobiles, and home i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/02C08K13/02C08K5/5313C08K3/04C08K3/34C08G63/08C08G63/85
CPCC08L67/04C08G63/08C08G63/823C08K2201/014C08L2201/02C08L2201/08C08L2205/035C08L2205/16C08L1/02C08K13/02C08K5/5313C08K3/04C08K3/34
Inventor 顾建芳
Owner 苏州奥宇包装科技有限公司
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