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Flame-retardant polylactic acid composite material and preparation method thereof

A technology of composite materials and polylactic acid, which is applied in the field of flame retardant materials, can solve problems such as insufficient environmental protection, and achieve the effects of reducing consumption, reducing environmental burden, and environmentally friendly industrial production

Active Publication Date: 2020-04-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, choline chloride contains halogen and can be used as a plasticizer, which is not environmentally friendly as a flame retardant

Method used

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  • Flame-retardant polylactic acid composite material and preparation method thereof
  • Flame-retardant polylactic acid composite material and preparation method thereof
  • Flame-retardant polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of phytic acid choline flame retardant, the steps are:

[0036] (1) 0.7mol sodium hydroxide and 0.7mol choline chloride were dissolved in 300g and 200g ethanol respectively, after the two solutions were mixed and reacted at normal temperature for 1h, suction filtration obtained the filtrate of choline hydroxide;

[0037] (2) Weigh 0.117mol phytic acid and dissolve it in 100g ethanol, mix the filtrate of the choline hydroxide obtained in step (1), react at normal temperature for 1h, remove the supernatant, and then wash with ethanol several times to pH =7 and no change, and then dried for 10 hours under the conditions of temperature 80° C. and pressure −0.08 MPa to obtain a phytic acid choline flame retardant, denoted as CPA1.

Embodiment 2

[0039] A preparation method of a green environment-friendly flame retardant, the steps are:

[0040](1) 0.7mol sodium hydroxide and 0.7mol choline chloride are dissolved in 300g and 200g methanol respectively, after reacting at normal temperature for 8h, suction filtration obtains the filtrate of choline hydroxide;

[0041] (2) Take 0.1053mol phytic acid and dissolve it in 100g methanol, react at normal temperature for 12h, get the filtrate of the choline hydroxide obtained in step (1) and mix, remove the supernatant, and then wash with ethanol several times to pH =7 and no change, and then dried for 10 hours under the conditions of temperature 80° C. and pressure −0.06 MPa to obtain phytic acid choline flame retardant, denoted as CPA2.

Embodiment 3

[0043] A preparation method of a green environment-friendly flame retardant, the steps are:

[0044] (1) 0.7mol sodium hydroxide and 0.7mol choline chloride are dissolved in 300g and 200g methanol respectively, after reacting at normal temperature for 3h, suction filtration obtains the filtrate of choline hydroxide;

[0045] (2) Weigh 0.0585mol phytic acid and dissolve it in 100g methanol, react at normal temperature for 10h, mix the filtrate of the choline hydroxide obtained in step (1), remove the supernatant, and then wash with ethanol several times to pH =7 and no change, and then dried for 10 hours under the conditions of temperature 80°C and pressure -0.1MPa to obtain phytic acid choline flame retardant, which is denoted as CPA3.

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PUM

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Abstract

The invention discloses a flame-retardant polylactic acid composite material and a preparation method thereof, and belongs to the field of flame-retardant materials. A preparation method of phytic acid-choline flame retardant comprises the following steps: preparing a choline hydroxide filtrate from choline chloride and sodium hydroxide, adding a phytic acid solution into the filtrate, removing the solvent after reaction, and carrying out drying to obtain the phytic acid-choline flame retardant. A preparation method of flame-retardant thermoplastic starch comprises the following steps: carrying out melt blending on 100 parts of starch, 15-40 parts of glycerol, 5-80 parts of the phytic acid-choline flame retardant and 0-20 parts of water at the processing temperature of 130-150 DEG C. The preparation method of the flame-retardant polylactic acid composite material comprises the following steps: carrying out melt blending on 100 parts by weight of polylactic acid and 5-50 parts by weightof the thermoplastic flame-retardant starch to obtain the flame-retardant polylactic acid composite material. The flame-retardant polylactic acid composite material prepared by the invention are biological sources and environment-friendly, the flame retardant effect of the composite material is obvious, the application range of each additive and material is effectively expanded, and meanwhile, the preparation method disclosed by the invention is simple and easy for large-scale production.

Description

technical field [0001] The invention belongs to the field of flame-retardant materials, and in particular relates to a flame-retardant polylactic acid composite material and a preparation method thereof. Background technique [0002] The development of biodegradable materials, especially biodegradable polymer materials based on renewable resources, to replace traditional petroleum-based polymer materials is one of the ways to effectively solve the above-mentioned "white pollution" problem. After biodegradable polymer materials are discarded, they can be decomposed into non-polluting small molecular substances such as CO through composting. 2 And water, etc., will not cause secondary pollution to the environment. Among all biodegradable polymers that have the prospect of replacing traditional petroleum-based polymers, polylactic acid Poly (lactic acid, also known as polylactide Polylactide, hereinafter referred to as PLA), because of its high mechanical strength, thermoplast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08K5/521C08K5/053C07F9/117
CPCC07F9/117C08L67/04C08L2201/02C08L3/02C08K5/521C08K5/053
Inventor 东为富王冬王维李婷汪洋陈明清
Owner JIANGNAN UNIV
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