Borate polymer@hexagonal boron nitride flame-retarding nanoparticles with core-shell structure as well as preparation method and application thereof

A hexagonal boron nitride and nanoparticle technology, applied in the field of organic-inorganic hybrid nanomaterials, can solve the problems of large amount of modified hexagonal boron nitride, uncontrollable modification effect, poor compatibility, etc. Low cost, mild reaction conditions, overcoming the effect of cumbersome reaction steps

Active Publication Date: 2019-04-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hexagonal boron nitride has excellent properties such as thermal stability, acid and alkali corrosion resistance, and insulation. However, like most inorganic nanoparticles, hexagonal boron nitride has poor compatibility with polymers, and the addition amount is large , so it is very important to modify it
The steps of this method are cumbersome, and the modification effect is uncontrollable. The amount of modified hexagonal boron nitride added to the resin is large, which limits its application in the field of fire-resistant and flame-retardant materials.

Method used

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  • Borate polymer@hexagonal boron nitride flame-retarding nanoparticles with core-shell structure as well as preparation method and application thereof
  • Borate polymer@hexagonal boron nitride flame-retarding nanoparticles with core-shell structure as well as preparation method and application thereof
  • Borate polymer@hexagonal boron nitride flame-retarding nanoparticles with core-shell structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation of involved multi-arm phenylboronic acid and multi-arm catechol is as follows:

[0057] (1) Dissolve 198mg of 4,4'-diaminodiphenylmethane and 300mg of 4-formylphenylboronic acid in 50mL of methanol, and stir overnight in the dark to obtain a nitrogen-containing two-arm phenylboronic acid solution;

[0058] (2) Dissolve 196mg of six (4-aminophenoxy) cyclotriphosphazene and 207mg of 3,4-dihydroxybenzaldehyde in 50mL of methanol, and stir overnight in the dark to obtain six-arm catechol containing phosphorus nitrogen solution;

[0059] The involved borate polymer@hexagonal boron nitride flame retardant nanoparticles with core-shell structure are prepared as follows:

[0060] (1) Add 160 mg of hexagonal boron nitride to 400 mL of methanol, and ultrasonically disperse it for half an hour to obtain a methanol dispersion of hexagonal boron nitride with a concentration of 0.4 mg / mL;

[0061] (2) Add the hexagonal boron nitride methanol dispersion in step (1) i...

Embodiment 2

[0070] The preparation of involved multi-arm phenylboronic acid and multi-arm catechol is as follows:

[0071] (1) Dissolve 396mg of 4,4'-diaminodiphenylmethane and 600mg of 4-formylphenylboronic acid in 100mL of methanol, and stir overnight in the dark to obtain a nitrogen-containing two-arm phenylboronic acid solution;

[0072] (2) Dissolve 392mg of six (4-aminophenoxy) cyclotriphosphazene and 414mg of 3,4-dihydroxybenzaldehyde in 100mL of methanol, and stir overnight in the dark to obtain six-arm catechol containing phosphorus nitrogen solution;

[0073] The involved borate polymer@hexagonal boron nitride flame retardant nanoparticles with core-shell structure are prepared as follows:

[0074] (1) Add 320 mg of hexagonal boron nitride to 800 mL of methanol, and ultrasonically disperse it evenly for half an hour to obtain a methanol dispersion of hexagonal boron nitride with a concentration of 0.4 mg / mL;

[0075] (2) Add the hexagonal boron nitride methanol dispersion in s...

Embodiment 3

[0084] The preparation of involved multi-arm phenylboronic acid and multi-arm catechol is as follows:

[0085] (1) Dissolve 594mg of 4,4'-diaminodiphenylmethane and 900mg of 4-formylphenylboronic acid in 150mL of methanol, and stir overnight in the dark to obtain a nitrogen-containing two-arm phenylboronic acid solution;

[0086] (2) Dissolve 588mg of six (4-aminophenoxy) cyclotriphosphazene and 621mg of 3,4-dihydroxybenzaldehyde in 150mL of methanol, and stir overnight in the dark to obtain phosphorus-nitrogen-containing six-arm catechol solution;

[0087] The involved borate polymer@hexagonal boron nitride flame retardant nanoparticles with core-shell structure are prepared as follows:

[0088] (1) Add 480 mg of hexagonal boron nitride to 1200 mL of methanol, and ultrasonically disperse it for half an hour to obtain a methanol dispersion of hexagonal boron nitride with a concentration of 0.4 mg / mL;

[0089] (2) Add the hexagonal boron nitride methanol dispersion in step (1...

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Abstract

The invention provides borate polymer@hexagonal boron nitride flame-retarding nanoparticles with core-shell structure as well as a preparation method and application. The preparation method comprisesthe following steps: firstly, reacting one or two polyamines containing elements including phosphorus, nitrogen and the like with 4-formylphenylboronic acid and 3,4-dihydroxy benzaldehyde respectivelyto prepare multi-arm phenylboronic acid and multi-arm o-dihydroxybenzene; secondly, dispersing hexagonal boron nitride to obtain a uniform hexagonal boron nitride dispersion solution; then adding themulti-arm phenylboronic acid into the dispersion solution; after uniformly dispersing, slowly adding the multi-arm o-dihydroxybenzene; reacting for a period of time at room temperature; and carryingout condensation on the multi-arm phenylboronic acid and the multi-arm o-dihydroxybenzene on the surface of hexagonal boron nitride to form one layer of a borate polymer, so as to obtain the borate polymer@hexagonal boron nitride flame-retarding nanoparticles. The borate polymer@hexagonal boron nitride flame-retarding nanoparticles are uniformly mixed with epoxy resin; and a proper amount of a curing agent is added and high-temperature curing is carried out to obtain an epoxy resin composite material containing the borate polymer@hexagonal boron nitride flame-retarding nanoparticles.

Description

technical field [0001] The invention belongs to the field of organic-inorganic hybrid nanomaterials, and in particular relates to a borate polymer@hexagonal boron nitride flame-retardant nanoparticle with a core-shell structure and its preparation method and application, especially its performance in flame-retardant reinforcement and toughening Applications in epoxy resin composites. Background technique [0002] Polymer materials are widely used in today's society and have irreplaceable advantages. However, these materials have a fatal shortcoming, flammability. The widespread use of polymer materials increases the risk of fire, and such safety hazards make it very important to develop polymer materials with fire and flame retardant functions. Studies have shown that adding inorganic nanoparticles is a way to improve the flame retardancy of polymers. Hexagonal boron nitride has excellent properties such as thermal stability, acid and alkali corrosion resistance, and insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/38C08L63/00C08G79/08
CPCC08G79/08C08K3/38C08K9/10C08K2003/385C08L2201/02C08L63/00
Inventor 戴李宗张泓毛杰李敏刘惠祥蔡其鹏李伟航陈国荣袁丛辉罗伟昂曾碧榕
Owner XIAMEN UNIV
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