Filler aluminum powder, modification method and application thereof
A technology of aluminum powder and modification, applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems that cannot be used to prepare thermal conductivity, wire drawing and high stability thermal conductive silicone grease, etc., to achieve good wire drawing performance and The effect of stability, high thermal conductivity, and good drawing performance
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example 1
[0055] 1. Preparation of modified aluminum powder with a particle size of 1-3 μm:
[0056] 1) Mix vinyltrimethoxysilane, deionized water, and isopropanol in a mass ratio of 1:5:5 to form a mixed solution, add 1% hydrochloric acid, condense and reflux, and continue stirring at 60°C for 1 hour;
[0057] 2) Add 1% hydrochloric acid and aluminum powder with a particle size of 1-3 μm to the mixed solution after the reaction in 1), condense and reflux, and continue stirring at 40° C. for 12 hours to obtain modified aluminum powder;
[0058] 3) Put the modified aluminum powder at room temperature, filter it with suction, wash it, and dry it for later use.
[0059] 2. Preparation of modified aluminum powder with a particle size of 12-14 μm:
[0060] 1) Mix vinyltrimethoxysilane, deionized water, and isopropanol in a mass ratio of 1:4:6 to form a mixed solution, add 1% hydrochloric acid, condense and reflux, and continue stirring at 60°C for 2 hours;
[0061] 2) Add 1% hydrochloric a...
example 2
[0067] 1. Preparation of modified aluminum powder with a particle size of 1-3 μm:
[0068] 1) Mix 3-aminopropyltrimethoxysilane, deionized water, and absolute ethanol in a mass ratio of 1:4:5 to form a mixed solution, add 2% glacial acetic acid, condense and reflux, and continue stirring at 40°C for 40 minutes;
[0069] 2) Add 2% glacial acetic acid and aluminum powder with a particle size of 1-3 μm to the mixed solution after the reaction in 1), condense and reflux, and continue stirring at 60° C. for 6 hours to obtain modified aluminum powder;
[0070] 3) Put the modified aluminum powder at room temperature, filter it with suction, wash it, and dry it for later use.
[0071] 4) Repeat steps 1)-3) 5 times.
[0072] 2. Preparation of modified aluminum powder with a particle size of 12-14 μm:
[0073] 1) Mix 3-aminopropyltrimethoxysilane, deionized water, and absolute ethanol in a mass ratio of 1:5:4 to form a mixed solution, add 2% glacial acetic acid, condense and reflux, a...
example 3
[0080] 1. Preparation of modified aluminum powder with a particle size of 1-3 μm:
[0081] 1) Prepare a mixed solution of propyltrimethoxysilane, deionized water and isopropanol in a mass ratio of 1:3:6, add 0.5% glacial acetic acid, condense and reflux, and continue stirring at room temperature for 10 minutes;
[0082] 2) Add 0.5% glacial acetic acid and aluminum powder with a particle size of 1-3 μm to the mixed solution after the reaction in 1), condense and reflux, and continue stirring at 80° C. for 2 hours to obtain modified aluminum powder;
[0083] 3) Put the modified aluminum powder at room temperature, filter it with suction, wash it, and dry it for later use.
[0084] 4) Repeat 1)-3) steps 2 times.
[0085] 2. Preparation of modified aluminum powder with a particle size of 12-14 μm:
[0086] 1) Prepare a mixed solution of propyltrimethoxysilane, deionized water and isopropanol at a mass ratio of 1:5:4, add 0.5% glacial acetic acid, condense and reflux, and continu...
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