A kind of preparation method of silicon carbide powder as organic composite material reinforcement

Abstract

The invention discloses a method for preparing silicon carbide powder as an organic composite material reinforcement, which comprises the following steps: step 1, taking the raw material of silicon carbide powder, sending it into a ball mill for shaping treatment; step 2, taking the shaped silicon carbide powder The silicon carbide powder is purified by acid washing with sulfuric acid, then washed with ultrapure water, and dried to obtain purified silicon carbide; step 3, mix the purified silicon carbide with ultrapure water, and add NaOH solution to obtain alkaline Silicon carbide slurry; step 4, add hydrophobic agent to the alkaline silicon carbide slurry, stir, place in an oven to dry, pass through a mesh screen, and continuously add to the sieved silicon carbide powder during the sieving process The strengthening agent is sprayed and dried evenly to obtain the silicon carbide powder used for the reinforcement of the organic composite material. The invention can effectively improve the affinity between the silicon carbide powder and the organic composite material, improve the compatibility and dispersibility during filling, improve the comprehensive performance of the product, and has simple process and easy control.

Description

technical field [0001] The invention relates to a method for preparing silicon carbide powder, in particular to a method for preparing silicon carbide powder as an organic composite reinforcement. Background technique [0002] At present, organic composite materials are widely used, but due to their poor wear resistance and poor thermal conductivity, some organic composite industrial products have strict requirements for these two indicators. In order to further enhance the performance of the material, adding appropriate Reinforcement materials are imperative. Silicon carbide has excellent properties such as strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance and chemical corrosion resistance, etc., but silicon carbide belongs to inorganic Non-metallic materials, the molecular structure is ionic bond crystal, which has go...

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Problems solved by technology

[0002] At present, organic composite materials are widely used, but due to their poor wear resistance and poor thermal conductivity, some organic composite industrial products have strict requirements for these two indicators. In order to further enhance the performance of the material, adding appropriate Reinforcement is imperative

Silicon carbide has excellent properties such as strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance and chemical corrosion resistance, etc., but silicon carbide belongs to inorganic Non-metallic materials, the molecular structure is ionic bond crystal, which has good hydrophilicity and cannot be well filled in organic composite materials. It needs special modification treatment to better combine with organic composite materials to achieve The purpose of enhancing organic composites

There are many researches on the hydrophobicity of silicon carbide at home and abroad, such as filling polymers, surface coating, polymer joint technology and other methods. These methods are mostly used in the preparation of silicon carbide ceramics, and basically have not been industrialized, and the cost is very expensive. , how to carry out hydrophobic treatment on silicon carbide, and find a method for large-scale industrial production, so that it can be applied in composite materials is a research direction we are concerned about