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Dopamine coated nano silicon dioxide modified conductive and heat-conducting glass fiber composite material and preparation method thereof

A technology of nano-silica and glass fiber, applied in fibrous fillers, chemical instruments and methods, dyeing polymer organic compound treatment, etc., can solve problems affecting the normal operation of equipment, data information leakage, etc.

Inactive Publication Date: 2017-09-22
铜陵市永创变压器电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Components such as electronic instrument shells made of strong composite materials are extremely susceptible to interference from external electromagnetic signals, which not only affects the normal operation of the equipment, but may also cause data leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] A method for preparing a dopamine-coated nano-silica modified conductive and thermally conductive glass fiber composite material, characterized in that, the following steps are carried out:

[0022] a. Dopamine-coated modified silica:

[0023] Add buffer solution to 6kg nano-silica at 1:5, ultrasonically disperse for 35min, add 1kg of dopamine, react in a constant temperature water bath at 25-35°C for 6h, centrifuge, wash with distilled water 5 times, and dry completely in an oven at 60-70°C ;

[0024] b. Modification of thermally conductive filler aluminum nitride:

[0025] Add 0.1kg of silane coupling agent KH570 to 4kg of micron aluminum nitride, add ethanol at a ratio of 1:5, adjust the pH to 5-6 with acetic acid, oscillate ultrasonically for 1 hour, heat and stir in a constant temperature water bath at 75-85°C, and reflux for 4 hours , after cooling, vacuum filter, wash 3 times with water, dry in a blast drying oven at 90-100°C, grind and pulverize to obtain modi...

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Abstract

The invention discloses a conductive and heat-conducting glass fiber composite material coated with dopamine and modified by nano-silica, which is characterized in that a buffer solution is added to the nano-silica, ultrasonically dispersed, dopamine is added, reacted in a water bath, centrifuged, Washing and drying; adding KH570 and ethanol to micron aluminum nitride, adjusting pH, ultrasonic oscillation, heating and stirring, reflux reaction, vacuum filtration after cooling, washing with water, drying, grinding and crushing to obtain modified aluminum nitride; glass fiber After calcination, soak in acetone for cleaning treatment, add hydrochloric acid solution, hydroxylation treatment, wash with distilled water, dry, add bovine serum albumin solution, stir for reaction, wash with water, and dry to obtain bovine serum albumin modified glass fiber Adding modified glass fiber to the graphite oxide dispersion, stirring, pulling, washing, drying, steam treatment, heat treatment, and then mixing with the material obtained above to obtain a conductive and thermally conductive material.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a dopamine-coated nano-silicon dioxide-modified conductive and heat-conducting glass fiber composite material. Background technique [0002] Glass fiber is a common inorganic fiber product in modern society. It has excellent physical and chemical properties such as high strength, high modulus, high temperature resistance, thermal insulation, electrical insulation, and chemical corrosion resistance. Therefore, it is widely used in the national economy. fields are widely used. However, due to the electrical insulation of glass fibers, the glass fibers increase [0003] Components such as electronic instrument casings made of strong composite materials are extremely susceptible to interference from external electromagnetic signals, which not only affects the normal operation of the equipment, but may also cause data leakage. Therefore, the preparation of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06C09C3/10
CPCC09C1/00C01P2006/32C01P2006/40C09C3/006C09C3/06C09C3/10
Inventor 曹云虎刘晓珍姚永红
Owner 铜陵市永创变压器电子有限公司
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