Low-smoke flame-retardant polylactic acid composite material and preparation method thereof

A composite material and low-smoke flame-retardant technology, which is applied in the field of low-smoke flame-retardant polylactic acid composite materials and its preparation, can solve the problems of ammonium polyphosphate's smoke-suppressing and poison-reducing effect not being obvious, and achieve good application prospects and low preparation costs , The effect of simple production process

Active Publication Date: 2021-10-26
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ammonium polyphosphate has high flame retardant efficiency, the smoke suppression and

Method used

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  • Low-smoke flame-retardant polylactic acid composite material and preparation method thereof
  • Low-smoke flame-retardant polylactic acid composite material and preparation method thereof
  • Low-smoke flame-retardant polylactic acid composite material and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0026] The preparation steps of the ammonium polyphosphate of silica gel microencapsulation are as follows:

[0027] a. Add 150 ml of absolute ethanol and 50 ml of deionized water into a three-necked flask, stir and mix mechanically and heat up to 45°C to obtain solution A;

[0028] b. Add 50 grams of ammonium polyphosphate and 0.5 grams of emulsifier OP-10 into solution A, and add a certain amount of ammonia water to adjust the pH of the solution to 9-10, and mechanically stir the mixed solution for 5 minutes to obtain solution B;

[0029] c. Slowly add 10 grams of tetraethyl orthosilicate to solution B within 30 minutes, then mechanically stir for 4 hours to obtain solution C;

[0030] d. After solution C is cooled, filter it, then wash the solid with deionized water and absolute ethanol, and dry the solid in a drying oven at 80°C for 24 hours to obtain silica gel microencapsulated ammonium polyphosphate (SiAPP).

[0031] The preparation steps of the titanium carbide nanosh...

Embodiment 1

[0038] A low-smoke flame-retardant polylactic acid composite material is prepared according to the following specific steps:

[0039] a. Weigh 0.2 parts of cetyl dimethyl benzyl ammonium chloride functionalized modified titanium carbide nanosheets, 14.8 parts of ammonium polyphosphate and 85 parts of polylactic acid microencapsulated by silica gel;

[0040] b. place the ammonium polyphosphate and polylactic acid of the hexadecyl dimethyl benzyl ammonium chloride functionalized modified titanium carbide nanosheets, the silica gel microcapsules in the internal mixer, at 180 Mixed at 100°C for 10 minutes, then placed the sample after banburying in a flat vulcanizing machine at 180°C for hot pressing to obtain a low-smoke and flame-retardant polylactic acid composite (PLA3).

Embodiment 2

[0042] A low-smoke flame-retardant polylactic acid composite material is prepared according to the following specific steps:

[0043] a. Weigh 0.5 parts of cetyl dimethyl benzyl ammonium chloride functionalized modified titanium carbide nanosheets, 14.5 parts of ammonium polyphosphate and 85 parts of polylactic acid of silica gel microencapsulation;

[0044] b. place the ammonium polyphosphate and polylactic acid of the hexadecyl dimethyl benzyl ammonium chloride functionalized modified titanium carbide nanosheets, the silica gel microcapsules in the internal mixer, at 180 Mixed at 100°C for 10 minutes, and then put the sample after banburying into a flat vulcanizing machine at 180°C for hot pressing to obtain a low-smoke and flame-retardant polylactic acid composite (PLA4).

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Abstract

The invention discloses a low-smoke flame-retardant polylactic acid composite material and a preparation method thereof. The low-smoke flame-retardant polylactic acid composite material is prepared from, in percentage by weight, 85% of polylactic acid, 13-14.8% of silica gel microencapsulated ammonium polyphosphate and 0.2-2% of hexadecyl dimethyl benzyl ammonium chloride functionalized modified titanium carbide nanosheets as raw materials through banburying and hot press molding. The obtained low-smoke flame-retardant polylactic acid composite material has a condensed-phase flame-retardant mechanism and a gas-phase flame-retardant mechanism, and heat and toxic smoke released during combustion of polylactic acid can be obviously reduced, so that the fire safety performance of polylactic acid can be obviously improved.

Description

technical field [0001] The invention belongs to the field of flame-retardant material preparation, and in particular relates to a low-smoke flame-retardant polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid has the advantages of non-toxicity, high transparency, high strength, good biocompatibility and easy processing, etc. It is widely used in packaging, electronic and electrical industries, biomedicine and transportation and other fields. However, polylactic acid is extremely flammable, and it will release a large amount of heat when burning, and produce a large amount of toxic and harmful smoke at the same time, which will not only seriously threaten personal safety, but also cause serious environmental pollution. In addition, when polylactic acid burns, it will also be accompanied by severe molten dripping, which can easily cause the rapid spread of fire. These shortcomings greatly limit the application of P...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K9/10C08K3/32C08K9/04C08K7/00
CPCC08K9/10C08K3/32C08K9/04C08K7/00C08L2201/02C08K2201/011C08K2003/323C08L67/04
Inventor 郭进刘川施永乾王子潇
Owner FUZHOU UNIV
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