Preparation technology for composite of epoxy resin nano silicon dioxide

A technology of nano-silica and epoxy resin, which is applied in the preparation process of epoxy resin composite materials, can solve problems such as complex processes, and achieve the effects of uniform mixing, increased dispersion and dispersion stability, and excellent mechanical properties

Inactive Publication Date: 2005-03-23
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The traditional preparation process of epoxy resin nano-silica composite material is to use dispersant to nano-SiO 2 The surface is modified, and then the modified nano-SiO 2 Dispersed into the epoxy resin, due to the nano-SiO 2 The surface needs to be modified first, so the process is complicated; in addition, how to

Method used

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  • Preparation technology for composite of epoxy resin nano silicon dioxide
  • Preparation technology for composite of epoxy resin nano silicon dioxide
  • Preparation technology for composite of epoxy resin nano silicon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the case of high-speed dispersion (5000-6000r / min), 0.1-5.0 parts by weight of nano silicon dioxide (SiO 2 ) particles are directly added to 95-105 parts by weight of liquid epoxy resin, and dispersed at high speed for 40 minutes; then add 40-60 parts by weight of water-based amine curing agent, mix evenly at a slow speed (100-200r / min), and mature for 20 minutes. The mixture was poured into a mold made of polytetrafluoroethylene, cured at constant temperature and humidity for 14 days (T=23±2° C., RH=55±5%), and the obtained polymer film was used for various performance tests.

Embodiment 2

[0023] Under the action of ultrasonic waves, the nanoparticles are directly dispersed in the liquid epoxy resin. Others are the same as method 1.

Embodiment 3

[0025] Under the action of ultrasonic waves, the nano-silica particles are firstly dispersed in 10-60 parts by weight of epoxy active diluent, and then mixed evenly with epoxy resin under the action of a high-speed disperser. Others are the same as method 1.

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Abstract

The invention is a preparing process of epoxy resin nano-SiO2 composite, under the action of ultrasonic wave, adding nano-SiO2 particles to the mixed solutin of silane coupling agent and epoxy active diluter for uniformly mixing, mixing with epoxy resin uniformly by high speed dispersion, then adding in water-borne amine hardener, making low-speed dispersion and curing, pouring the mixture into a mould: constant-temperature and constant-humidity curing for 14 days at T=23plus or minus 2 deg.C and RH= 55 plus or minus 5%, and obtaining it. The nano-SiO2 particles need no surface preprocessing but are directly added to the silane coupling agent-epoxy resin system, thus simplifying the operating procedures of complicated nano-particle surface preprocessing, drying, etc, and improving various properties of epoxy resin composite, beneficial to product industrialization.

Description

technical field [0001] The invention relates to a preparation process of epoxy resin composite material, more specifically, it is a preparation process of epoxy resin composite material modified by adding nano silicon dioxide particles. The composite material prepared by this process has good physical and mechanical properties, thermal properties and weather resistance; it is suitable for use as anti-shock and wear-resistant materials, anti-cavitation materials, concrete coating materials, chemical grouting materials, etc. in water conservancy and hydropower projects. Background technique [0002] Epoxy resin has good mechanical properties, dielectric properties and outstanding bonding ability. It has been widely used as a composite material matrix, coating, electrical insulation material, adhesive, etc., and plays a leading role in thermosetting resins. In the application field of hydraulic materials, because these properties of epoxy resin meet some special requirements of...

Claims

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Application Information

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IPC IPC(8): C08K3/36C08L63/00
Inventor 汪在芹李珍魏涛夏正斌李晓鄂苏杰黄良锐
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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