Heat-resistant flame-retardant polylactic acid composite material and preparation method thereof

A composite material and polylactic acid technology, applied in the field of heat-resistant and flame-retardant polylactic acid composite materials and their preparation, can solve the problems of limited application and poor heat resistance, and achieve excellent high strength, excellent flexibility, and excellent toughening effect. Effect

Inactive Publication Date: 2018-03-27
HENAN ZHILIAN HUANYU INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the PLA material itself is brittle and has poor heat resistance, which greatly limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The embodiment of the present invention provides a heat-resistant and flame-retardant polylactic acid composite material, which is made of the following raw materials in parts by weight: 50 parts of polylactic acid, 4 parts of chitosan, 2 parts of graphene nanosheets, 5 parts of carbon fiber, glass fiber 5 parts, 5 parts of mica, 1 part of silica sol, 10 parts of expanded graphite, 2 parts of attapulgite, 1 part of diaminodiphenylmethane tetraglycidylamine and 1 part of silane coupling agent KH550; wherein, the polylactic acid The weight-average molecular weight is 100,000, and the melting point is 60°C; both carbon fiber and glass fiber are treated with silane coupling agent KH550.

[0021] The preparation method of the above-mentioned heat-resistant and flame-retardant polylactic acid composite material provided in this embodiment includes the following steps:

[0022] (1) Place graphene nanosheets and diaminodiphenylmethane tetraglycidylamine in DMF solvent, mechanic...

Embodiment 2

[0026] The embodiment of the present invention provides a heat-resistant and flame-retardant polylactic acid composite material, which is made of the following raw materials in parts by weight: 70 parts of polylactic acid, 5 parts of chitosan, 3 parts of graphene nanosheets, 7 parts of carbon fiber, glass fiber 7 parts, 7 parts of mica, 2 parts of silica sol, 12 parts of expanded graphite, 3 parts of attapulgite, 2 parts of diaminodiphenylmethane tetraglycidylamine, 2 parts of silane coupling agent KH560; wherein, the polylactic acid The weight-average molecular weight is 300,000, and the melting point is 60°C; both carbon fiber and glass fiber are treated with silane coupling agent KH560.

[0027] The preparation method of the above-mentioned heat-resistant and flame-retardant polylactic acid composite material provided in this embodiment includes the following steps:

[0028] (1) Place graphene nanosheets and diaminodiphenylmethane tetraglycidylamine together in DMF solvent,...

Embodiment 3

[0032] The embodiment of the present invention provides a heat-resistant and flame-retardant polylactic acid composite material, which is made of the following raw materials in parts by weight: 80 parts of polylactic acid, 7 parts of chitosan, 5 parts of graphene nanosheets, 9 parts of carbon fiber, glass fiber 8 parts, 8 parts of mica, 3 parts of silica sol, 14 parts of expanded graphite, 3 parts of attapulgite, 4 parts of diaminodiphenylmethane tetraglycidylamine, 2 parts of silane coupling agent KH570; wherein, the polylactic acid The weight-average molecular weight is 500,000, and the melting point is 60°C; both carbon fiber and glass fiber are treated with silane coupling agent KH570.

[0033] The preparation method of the above-mentioned heat-resistant and flame-retardant polylactic acid composite material provided in this embodiment includes the following steps:

[0034] (1) Place the graphene nanosheets and diaminodiphenylmethane tetraglycidylamine together in DMF solv...

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Abstract

The invention provides a heat-resistant flame-retardant polylactic acid composite material, which is prepared from the following raw materials by weight: 50-100 parts of polylactic acid, 4-10 parts ofchitosan, 2-8 parts of graphene nano-sheets, 5-14 parts of carbon fiber, 5-12 parts of glass fiber, 5-10 parts of mica, 1-5 parts of silica sol, 10-18 parts of expanded graphite, 2-6 parts of attapulgite, 1-5 parts of diaminodiphenylmethane tetraglycidylamine, and 1-3 parts of a silane coupling agent, wherein the specific surface area of the graphene nano-sheets is 80-100 m<2> / g, and the graphenenano-sheets are treated with diaminodiphenylmethane tetraglycidylamine. The invention further provides a preparation method of the heat-resistant flame-retardant polylactic acid composite material. The heat-resistant flame-retardant polylactic acid composite material of the present invention has advantages of excellent fire retardation, good toughness, good high-temperature resistance and high comprehensive mechanical strength.

Description

technical field [0001] The invention relates to a polylactic acid composite material, in particular to a heat-resistant and flame-retardant polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid (English abbreviation: PLA) is a thermoplastic aliphatic polyester. The lactic acid and lactide required for the production of polylactic acid can be obtained through fermentation, dehydration, and purification of renewable resources. The obtained polylactic acid generally has good properties. Mechanical and processing properties, and polylactic acid products can be quickly degraded in various ways after being discarded, so it is a green plastic with good performance. However, the PLA material itself is brittle and has poor heat resistance, which greatly limits its application. [0003] Graphene nanosheets, referred to as GNSs (Graphene nanosheets) or GNFs (GrapheneNanoFlakes), are stacked by single-layer carbon atom planar...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08L67/04C08L5/08C08K13/06C08K9/04C08K7/00C08K3/04C08K9/06C08K7/06C08K7/14C08K3/34C08K3/36C08K7/24
CPCC08K2201/003C08K2201/011C08L67/04C08L2201/02C08L2201/08C08L5/08C08K13/06C08K9/04C08K7/00C08K3/04C08K9/06C08K7/06C08K7/14C08K3/346C08K3/36C08K7/24C08K3/34
Inventor郑锦华白文科陈晓堂
OwnerHENAN ZHILIAN HUANYU INTPROP OPERATION CO LTD