Prepn. process of nano SiO2/boron bakelite resin nano composite material

A nano-composite material and nano-silica technology, applied in the direction of fire-resistant coatings, etc., can solve the problems of high brittleness of phenolic resin, limit the development of high-performance materials, poor toughness, etc., and achieve the effect of excellent thermal performance

Inactive Publication Date: 2006-09-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of industry, especially the development of aerospace and other cutting-edge defense technologies, the shortcomings of traditional unmodified phenolic resins such as high brittleness, poor toughness and poor heat resistance limit the development of high-performance materials.

Method used

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  • Prepn. process of nano SiO2/boron bakelite resin nano composite material
  • Prepn. process of nano SiO2/boron bakelite resin nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step (1): Dissolve 1g of surface treatment agent KH550 with 50ml of ethanol solvent. Then add 15g gas-phase method nano-SiO to the solution 2 (average diameter 12nm), disperse for 30 minutes under the action of 40kHz ultrasonic waves, and make surface-treated nano-SiO after separating the solvent 2 ;

[0024] Step (2): 500 g of block-shaped modified boron phenolic resin containing quantitative boron is pulverized with a powder pulverizer, dissolved in 500 ml of ethanol solvent, stirred for 30 minutes and left still for 24 hours to obtain a boron phenolic resin solution;

[0025] Step (3): the surface-treated nano-SiO obtained in step (1) 2 Mix with the boron phenolic resin solution obtained in step (2), disperse for 60 minutes under the action of 40kHz ultrasonic waves, separate and recover the solvent by decompression, and obtain nano-scale dispersed nano-SiO 2 / boron phenolic resin premix.

[0026] Step (4): the nano-SiO obtained in step (3) 2 / The boron phenol...

Embodiment 2

[0030]Step (1): Dissolve 1.25g of surface treatment agent KH570 in 100ml of isobutanol solvent. Add 12.5g gas-phase method nano-SiO to the solution again 2 (average diameter 8nm), disperse for 20 minutes under the action of 100kHz ultrasonic waves, and make surface-treated nano-SiO after separating the solvent 2 ;

[0031] Step (2): Pulverize 250 g of block-shaped modified boron phenolic resins containing quantitative boron with a powder pulverizer, dissolve it in 250 ml of ethanol solvent, stir for 30 minutes and then stand still for 10 hours to obtain a boron phenolic resin solution;

[0032] Step (3): the surface-treated nano-SiO obtained in step (1) 2 Mix with the boron phenolic resin solution obtained in step (2), disperse for 100 minutes under the action of 60kHz ultrasonic waves, separate and recover the solvent by decompression, and obtain nano-scale dispersed nano-SiO 2 / boron phenolic resin premix.

[0033] Step (4): the nano-SiO obtained in step (3) 2 / The bo...

Embodiment 3

[0036] Step (1): Dissolve 2.8g of surface treatment agent NDZ401 with 100ml of acetone. Then add 28g gas-phase method nano-SiO in the solution 2 (average diameter 25nm), disperse for 10 minutes under the action of 1000kHz ultrasonic waves, and make surface-treated nano-SiO after separating the solvent 2 ;

[0037] Step (2): 400 g of block modified boron phenolic resin containing quantitative boron is pulverized with a powder pulverizer, dissolved in 400 ml of ethanol solvent, stirred for 30 minutes and then left still for 36 hours to obtain boron phenolic resin solution;

[0038] Step (3): the surface-treated nano-SiO obtained in step (1) 2 Mix with the boron phenolic resin solution obtained in step (2), disperse for 180 minutes under the action of 400kHz ultrasonic waves, separate and recover the solvent under reduced pressure, and obtain nano-scale dispersed nano-SiO 2 / boron phenolic resin premix.

[0039] Step (4): the nano-SiO obtained in step (3) 2 / The boron phen...

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Abstract

This invention is attributed to the technology of nano-composite materials and specifically relates to a method to prepare nano-sized silicon dioxide / boron phenolic resin nano-composite materials. In this method, solution blending and ultrasonic wave-aided dispersion are combined so as to ensure nano-sized dispersion of the nano-particles in composite materials. The nano-sized silicon dioxide is surface treated so as form good interfaces with boron phenolic resin matrix and to adequately take advantages of nano-sized silicon dioxide and boron phenolic resin. This invention aims at preparing boron phenolic resin nano-composites with different nano-sized silicon dioxide content by reasonable technique control. The rigidity, wear resistance and thermo-chemical stability of nano-sized silicon dioxide and good mechanical properties, thermo resistance and ablation resistance of boron-modified phenolic resin are utilized, and therefore the prepared nano-sized silicon dioxide / boron phenolic resin nano-composite materials can be widely used in high-temperature abrasion materials, ablation resistant materials, special structural materials and thermo resistant materials.

Description

technical field [0001] The invention belongs to the technical field of nano composite materials, and in particular relates to a preparation method of nano silicon dioxide / boron phenolic resin nano composite materials. Background technique [0002] In recent years, polymer-based inorganic nanocomposites, as a newcomer in material science, have attracted people's attention greatly. This type of material has the advantages of both polymers and inorganic nanomaterials. Because the interface area between inorganic nanomaterials and polymers is very large, and there is a chemical bond between the polymer and inorganic filler interfaces, it has ideal bonding properties. , can eliminate the mismatch of thermal expansion coefficients between the inorganic substance and the polymer matrix, and can give full play to the excellent mechanical properties and high heat resistance of inorganic nanomaterials, and thus produce many excellent results in mechanics, optics, electricity, and magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08K9/06C08K3/38C08J5/14C09K21/14C08K3/36
Inventor 邱军王国建
Owner TONGJI UNIV
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