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Flame-retardant polyvinyl alcohol composite material and preparation method thereof

A polyvinyl alcohol and composite material technology, 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 source green

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 polyvinyl alcohol composite material and preparation method thereof
  • Flame-retardant polyvinyl alcohol composite material and preparation method thereof
  • Flame-retardant polyvinyl alcohol composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of phytic acid choline flame retardant, the steps are:

[0030] (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;

[0031] (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

[0033] A preparation method of a green environment-friendly flame retardant, the steps are:

[0034] (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;

[0035] (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 a phytic acid choline flame retardant, denoted as CPA2.

Embodiment 3

[0037] A preparation method of a green environment-friendly flame retardant, the steps are:

[0038] (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;

[0039] (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 −0.1 MPa to obtain a phytic acid choline flame retardant, denoted as CPA3.

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PUM

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Abstract

The invention discloses a flame-retardant polyvinyl alcohol composite material and a preparation method thereof, and belongs to the field of flame-retardant materials. The preparation method of the phytic acid-choline flame retardant comprises the following steps: taking choline chloride, sodium hydroxide and a solvent, reacting the materials for 1-8 hours at the temperature of -10 DEG C to 60 DEGC, then performing suction filtration to obtain a filtrate of choline hydroxide, adding a phytic acid solution into the filtrate, wherein the mole ratio of phytic acid to choline is 0.8-2.0 based onthe molar ratio of nitrogen atoms in the quaternary ammonium salt to free hydroxyl in phytic acid, removing the solvent after a reaction is conducted for 1-12 h, and drying the product to obtain the phytic acid-choline flame retardant. The preparation method of the flame-retardant polyvinyl alcohol composite material comprises the following steps: carrying out melt blending or solution mixing on 100 parts by weight of polyvinyl alcohol, 5-160 parts by weight of the phytic acid-choline and 5-40 parts by weight of a plasticizer. The polyvinyl alcohol composite material prepared by the inventionis environment-friendly, the flame-retardant effect of the composite material is obvious, the application range of each auxiliary agent and material is effectively expanded, and meanwhile, the preparation method 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 polyvinyl alcohol composite material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA) is a high-molecular polymer with excellent comprehensive properties that can be produced on a large scale by non-petroleum routes. It is cheap, has excellent oil resistance, solvent resistance and gas barrier properties, and has unique advantages in food and drug packaging. However, polyvinyl alcohol has a low limiting oxygen index (LOI) and is extremely flammable, which severely limits its application. Common halogen-containing flame retardants will decompose and generate irritating hydrogen halide gas during combustion, which is even more harmful to personal safety than the fire itself. Flame retardants are an effective way to improve the flame retardancy of materials. Currently used flame retardants include halogen-...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K5/521C08K5/053C07F9/117
CPCC07F9/117C08K5/053C08K5/521C08L2201/02C08L29/04
Inventor 东为富王冬汪洋李婷白绘宇杨伟军施冬健
Owner JIANGNAN UNIV
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