Preparation method of epoxy resin composite material based on nano-silica particles

A technology of nano-silicon oxide and epoxy resin, which is applied in the field of preparation of epoxy resin composite materials, can solve the problems of easy explosion, large equipment investment, complicated process, etc., and achieve simple and easy operation, high mechanical properties, and low process consumption can low effect

Inactive Publication Date: 2015-09-09
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the 1990s, my country's epoxy resin industry has developed rapidly, but its production capacity only accounts for 9% of the world's total production capacity, and the epoxy resins produced are few in variety and poor in quality. needs
Patent CN 1597773A (1992) modified epoxy resin with nano silicon oxide particles, but what this method used was ether solution to carry out surface treatment on nanoparticles, because the boiling point of ether was only 34.5°C, it was easy to explode, and the toxicity of ether vapor Very large, not conducive to personal safety and environmental protection
Some other patents, such as Chinese patent application numbers: 03126909.5, 200610034690.8 and 200810040711.6, have the disadvantages of high energy consumption, serious dust pollution, large equipment investment, complicated process and easy reunion of nanoparticles due to secondary melting of resin

Method used

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  • Preparation method of epoxy resin composite material based on nano-silica particles
  • Preparation method of epoxy resin composite material based on nano-silica particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of preparation method based on the epoxy resin composite material of nano silicon oxide particle, comprises the steps:

[0017] 1) Take ethanol and add coupling agent and nano-silica particles successively, mechanically stir for at least 60 minutes, and then ultrasonically disperse for at least 90 minutes, wherein the mass of coupling agent accounts for 3% of the mass of ethanol, and the coupling agent is KH- 550 silane coupling agents, the particle diameter of the nano silicon oxide particles is 45nm;

[0018] 2) heating and drying the ethanol solution in step 1) to obtain pretreated nano-silicon oxide particles, and grinding the pre-treated nano-silicon oxide particles for 40 minutes to obtain modified nano-silicon oxide particles;

[0019] 3) Take the epoxy resin and preheat it at 70°C for 23 minutes, add the modified nano-silica particles obtained in step 2) to the preheated epoxy resin, and then add Curing agent, mechanical stirring for at least 70 minutes,...

Embodiment 2

[0023] A kind of preparation method based on the epoxy resin composite material of nano silicon oxide particle, comprises the steps:

[0024] 1) Take ethanol and add coupling agent and nano-silicon oxide particles successively, mechanically stir for at least 80 minutes, and then ultrasonically disperse for at least 60 minutes, wherein the mass of coupling agent accounts for 2% of the mass of ethanol, and the coupling agent is titanic acid Ester coupling agent, the particle size of the nano silicon oxide particles is 30nm;

[0025] 2) heating and drying the ethanol solution in step 1) to obtain pretreated nano-silicon oxide particles, and grinding the pre-treated nano-silicon oxide particles for 35 minutes to obtain modified nano-silicon oxide particles;

[0026] 3) Take the epoxy resin and preheat it at 63°C for 27 minutes, add the modified nano-silica particles obtained in step 2) to the preheated epoxy resin, and then add Curing agent, mechanical stirring for at least 90 mi...

Embodiment 3

[0030] A kind of preparation method based on the epoxy resin composite material of nano silicon oxide particle, comprises the steps:

[0031] 1) Take ethanol and add coupling agent and nano-silica particles successively, mechanically stir for at least 70 minutes, and then ultrasonically disperse for at least 110 minutes, wherein the mass of coupling agent accounts for 1.5% of the mass of ethanol, and the coupling agent is alumina Ester coupling agent, the particle size of the nano silicon oxide particles is 150nm;

[0032] 2) heating and drying the ethanol solution in step 1) to obtain pretreated nano-silicon oxide particles, and grinding the pre-treated nano-silicon oxide particles for 50 minutes to obtain modified nano-silicon oxide particles;

[0033] 3) Take the epoxy resin and preheat it at 65°C for 25 minutes, add the modified nano-silica particles obtained in step 2) to the preheated epoxy resin, and then add Curing agent, mechanical stirring for at least 80 minutes, u...

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Abstract

The invention provides a preparation method of an epoxy composite material on the basis of nano silica particles and solves the problems that the operation is complex, the investment is large, the pollution is easy to happen in the conventional preparation method, and mechanical performance of composite materials prepared through the conventional preparation method is undesirable. The preparation method comprises the following steps: the nano silica particles are well dispersed by the ethanol solution of a coupling agent under the combined action of violent stirring and ultrasonic wave; the processed nano silica particles are dried and grinded so as to obtain modified nano silica particles; then the modified nano silica particles are added into preheated epoxy resin; after the modified nano silica particles and the epoxy resin are stirred uniformly and subjected to vacuum defoaming treatment, the mixture is poured into a preheated die; the mixture is heated to be solidified completely under the condition of vacuum pumping, so that the epoxy composite material is obtained. The preparation method provided by the invention has the advantages that the process is convenient, the operation is simple and easy, the raw materials are low in cost and easy to obtain, the production cost is reduced, the dispersibility of nano silica particles is good, the agglomeration phenomenon does not exist, the energy consumption of the technology is low, the pollution does not exist, and the composite materials prepared through the preparation method have higher mechanical performance.

Description

technical field [0001] The invention relates to a preparation process of a new material, in particular to a preparation method of an epoxy resin composite material based on nano silicon oxide particles. Background technique [0002] Epoxy resin is a synthetic resin widely used in many fields. It is widely used in the fields of structure, aerospace, adhesives, coatings, etc. due to its excellent mechanical properties, bonding properties, heat resistance, and dimensional stability. Since the 1990s, my country's epoxy resin industry has developed rapidly, but its production capacity only accounts for 9% of the world's total production capacity, and the epoxy resins produced are few in variety and poor in quality. demand. Epoxy resin nanocomposites have attracted widespread attention due to their excellent comprehensive properties. For example, Wang Li et al. (Li Wang et al, Macromolecular Materials and Engineering) prepared nano-silica / epoxy resin composites by in-situ polymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/06C08K9/04C08K9/00C08K3/36
Inventor 何宏伟丁敏罗居杰康利涛高峰
Owner TAIYUAN UNIV OF TECH
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