Preparation method of microencapsulated flame retardant

A technology of microencapsulation and flame retardant, applied in the field of flame retardant materials, can solve problems such as poor dispersion and affect the strength of materials, and achieve the effects of reducing dosage, saving costs and reducing loss.

Active Publication Date: 2019-11-01
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After halogen flame retardants and metal flame retardants, phosphorus flame retardants are widely used due to their cleanness, environmental protection and good flame retardant effect. Among them, ammonium polyphosphate is the most commonly used, but similarly, ammonium polyphosphate is also Facing some problems, such as poor dispersion, affecting material strength and other shortcomings

Method used

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  • Preparation method of microencapsulated flame retardant
  • Preparation method of microencapsulated flame retardant
  • Preparation method of microencapsulated flame retardant

Examples

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Effect test

Embodiment 1

[0019] A preparation method of microcapsules with good flame retardant properties, comprising the steps of:

[0020] 1) Chitosan hydrochloride powder was added to 600ml deionized water, and stirred at 300rpm / min for 30min to obtain a homogeneous solution;

[0021] 2) Add the ammonium polyphosphate suspension liquid that has been ultrasonically treated for 6 minutes into the solution prepared in step (1), the mass ratio of ammonium polyphosphate to chitosan hydrochloride is 1:3, and fully stir to obtain microencapsulated polyphosphoric acid ammonium; suction filtration, washing to obtain ammonium polyphosphate microcapsules containing a small amount of water.

[0022] 3) Add the microcapsules obtained in step (2) into the suspension containing carboxyl-modified nanocellulose, stir continuously to make it evenly mixed, and pour the mixed solution into the mold, wherein the carboxyl-modified nanocellulose and microcapsules The mass ratio of ammonium polyphosphate is 7: 3;

[00...

Embodiment 2

[0029] A preparation method of microcapsules with good flame retardant properties, comprising the steps of:

[0030] 3) Chitosan hydrochloride powder was added to 600ml deionized water, and stirred at 300rpm / min for 30min to obtain a homogeneous solution;

[0031] 4) Add the ammonium polyphosphate suspension solution that was ultrasonically treated for 6 minutes into the solution prepared in step (1), the mass ratio of ammonium polyphosphate to chitosan hydrochloride was 1:3, and fully stirred to obtain microencapsulated polyphosphoric acid ammonium; suction filtration, washing to obtain ammonium polyphosphate microcapsules containing a small amount of water.

[0032] 3) Add the microcapsules obtained in step (2) into the suspension containing carboxyl-modified nanocellulose, stir continuously to make it evenly mixed, and pour the mixed solution into the mold, wherein the carboxyl-modified nanocellulose and microcapsules The mass ratio of ammonium polyphosphate is 1:1;

[00...

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Abstract

The invention belongs to the field of flame retardant materials, and particularly relates to a preparation method of a microencapsulated flame retardant. According to the method provided by the invention, chitosan hydrochloride is used as a capsule material, ammonium polyphosphate is used as a core material, the mass ratio of the chitosan hydrochloride to the ammonium polyphosphate is 3: 1, the ammonium polyphosphate is subjected to ultrasonic crushing and then is added into a chitosan hydrochloric acid solution, and the microencapsulated ammonium polyphosphate with flame retardance is prepared by a physical coating method. The prepared microcapsule can be applied to a paper sheet or a high polymer material so that the material can have good flame retardance. By the method which is relatively simple to operate, the microencapsulated flame retardant with good flame retardance is prepared, and has important significance.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, and in particular relates to a preparation method of microcapsules with good flame retardant properties. [0002] technical background [0003] Today's society has higher and higher requirements for safety. Therefore, since the 1990s, researchers have been working on the research of flame retardants to endow flammable materials with flame retardancy and protect people's lives and property. After halogen flame retardants and metal flame retardants, phosphorus flame retardants are widely used due to their cleanness, environmental protection and good flame retardant effect. Among them, ammonium polyphosphate is the most commonly used, but similarly, ammonium polyphosphate is also Facing some problems, such as poor dispersion, affecting material strength and other shortcomings. Contents of the invention [0004] The purpose of the present invention is to prepare a kind of flame retardant wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/69D21H17/66D21H21/34B01J13/02C09C1/00C09C3/10
CPCD21H17/69D21H17/66D21H21/34B01J13/02C09C1/00C09C3/10
Inventor 刘洪斌孙熠炜安兴业
Owner TIANJIN UNIV OF SCI & TECH
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