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Layer-by-layer self assembly modified boron phosphate as well as preparation method and application thereof

A layer-by-layer self-assembly and boron phosphate technology, which is applied in the field of flame-retardant materials, can solve the problems such as the decline in the mechanical properties of polymer composite materials, and achieve the effects of improving mechanical properties, improving catalytic carbonization, and good barrier effects

Inactive Publication Date: 2018-03-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply adding catalytic char-forming flame retardants to obtain flame retardant properties often leads to a decline in the mechanical properties of polymer composites.
At present, there is no combination of layer-by-layer self-assembly technology and catalytic charcoal flame-retardant technology. Using the interfacial expansion of the silane coupling agent and the barrier effect of the silicate layer to perform boron phosphate surface treatment to obtain both good flame-retardant Properties and mechanical properties of polymer composites are reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of layer-by-layer self-assembly modified boron phosphate

[0034] Add 300g of BP powder into 600mL of 6g / L γ-aminopropyltriethoxysilane aqueous solution, stir at 200r / min for 10min, filter, wash, and dry the collected solid product at 100°C 10h to obtain BP-A; add 120g MMT-Na to 600mL deionized water to swell for 24h, then add 300g BP-A, stir at 200r / min for 10min, filter, wash, and collect the solid product at 100°C Dry for 10 hours to obtain BP-A-MMT; then add 300g BP-A-MMT to 600mL aqueous solution of γ-aminopropyltriethoxysilane with a concentration of 6g / L, stir at 200r / min for 10min, and filter , washed, and dried the collected solid product at 100° C. for 10 h to obtain BP-A-MMT-A, that is, the layer-by-layer self-assembled modified boron phosphate, the surface silane coupling agent mass percentage is 3.2%, silicic acid The mass percentage of salt is 14.1%.

[0035] (2) Preparation of flame retardant epoxy resin composites

[0036]Based on the ...

Embodiment 2

[0040] On the basis of Example 1, the mass percent of E44 is changed from 85.0% to 82.3%, the mass percent of m-PDA is changed from 10.0% to 9.7%, and the mass percent of BP-A-MMT-A is changed from 5.0% to 8.0%, other conditions are the same as in Example 1, and a flame-retardant epoxy resin composite material is prepared.

[0041] The limiting oxygen index of the flame-retardant epoxy resin composite material prepared in this embodiment is 33.8%, and the heat release rate is 370kW / m 2 , the smoke release rate is 0.18m 2 / s, the tensile strength is 74.5MPa, and the flexural modulus is 125.7MPa.

Embodiment 3

[0043] (1) Preparation of layer-by-layer self-assembly modified boron phosphate

[0044] Add 300g of BP powder to 600mL of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution with a concentration of 6g / L, stir at 300r / min for 10min, filter, wash, and The collected solid product was dried at 90°C for 14 hours to obtain BP-A; 120g MMT-Na was added to 600mL deionized water to swell for 24 hours, then 300g BP-A was added, stirred at 300r / min for 10min, filtered, washed, Dry the collected solid product at 90°C for 14 hours to obtain BP-A-MMT; then add 300g of BP-A-MMT to 600mL of N-(β-aminoethyl)-γ-aminopropyl with a concentration of 6g / L In the trimethoxysilane aqueous solution, after stirring at 300r / min for 10min, filter, wash, and dry the collected solid product at 90°C for 14h to obtain BP-A-MMT-A, which is the layer-by-layer self-assembly modification For boron phosphate, the mass percentage of the silane coupling agent on its surface is 3.8%, and the mass percen...

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PUM

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Abstract

The invention relates to layer-by-layer self assembly modified boron phosphate as well as a preparation method and application thereof, and belongs to the technical field of a flame retardant material. Through the sequential self assembly of an amino-containing silane coupling agent layer, a silicate layer and an amino-containing silane coupling agent layer on the surface of boron phosphate, the modified boron phosphate is obtained; the preparation process of the modified boron phosphate is simple; the cost is low. Through controlling the contents of the surface silane coupling agents and silicate of the modified boron phosphate, the flame retardant performance of the modified boron phosphate and the controllable regulation of the compatibility of the resin substrates can be realized. Whenbeing used for improving the flame retardant of epoxy resin, the modified boron phosphate provided by the invention has the characteristics that the addition quantity is small; the flame retardant efficiency is high; the smoke generating quantity is low; the mechanical property is good; the cost is low, and the like. Good application prospects are realized.

Description

technical field [0001] The invention relates to layer-by-layer self-assembled modified boron phosphate, a preparation method and application thereof, and belongs to the technical field of flame-retardant materials. Background technique [0002] Epoxy resin (EP) is an important class of thermosetting polymer materials, which are widely used in electronics, construction, aerospace, shipping and other fields due to their excellent mechanical properties, electrical properties and adhesive properties. base resin material. However, due to the flammability of EP (the oxygen index of pure epoxy resin is as low as about 20%), its application is limited; Environmental hazards have been included in the list of substances of concern, and risk assessments are being conducted worldwide. Therefore, it is necessary to invent new halogen-free flame retardants and flame-retardant EP materials. [0003] Layer-by-layer self-assembly flame retardant technology is a new type of halogen-free fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K9/02C08K3/38C08L63/00C08G59/50
CPCC08G59/5033C08K3/38C08K9/02C08K9/06C08K2201/003C08L2201/02C08L63/00
Inventor 郝建薇周友肖静李园园王义亮
Owner BEIJING INSTITUTE OF TECHNOLOGYGY