A preparation method of rubber-based composite material with wide temperature range and high thermal conductivity
A composite material and high thermal conductivity technology, applied in the field of new nano-materials, can solve the problem of low thermal conductivity of thermally conductive rubber materials, and achieve the effects of improving thermal conductivity, good processing performance, and good thermodynamic performance
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[0046] A method for preparing a rubber-based composite material with a wide temperature range and high thermal conductivity, the steps of which are:
[0047] (1) Preparation of nano-copper / nitrile rubber composite material: at 20-80°C, use nitrile rubber as a ligand, disperse through ultrasonic waves, and then use the method of coordination reduction to add Reducing agent, anti-aging agent, nano-copper, washed and dried after flocculation, to prepare nano-copper / nitrile rubber composite material;
[0048] (2) Proportioning the nano-copper / nitrile rubber composite material prepared in the above steps with the raw materials and masticating respectively, after masticating for 1-20 minutes, blending the above materials, and adding thermally conductive fillers and other ingredients to make a mixed rubber, and then park the above mixed rubber for 8-24 hours, and then vulcanize for 10-60 minutes at 100-200 ° C and 5-20 MPa to obtain the required rubber-based composite material.
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Embodiment 1
[0053] Weigh 400g of NBR latex, add 100g of hydroxylamine solution with a concentration of 35g / L into the latex under magnetic stirring, ultrasonicate at 50°C for 1h, and slowly add 100g of 10% copper sulfate and 30g of formaldehyde solution at 30°C, and add anti-aging agent WL 1.5 g. Adjust the pH value of the latex to 2 for flocculation, then repeatedly wash the flocculated latex with deionized water at 100°C, and dry it at 110°C for 2 hours to prepare nano-copper / nitrile rubber composites.
[0054] At 30°C, put 40g of butyl rubber, 70g of nano-copper / nitrile rubber composite material, and 10g of EPDM rubber into the open mixer, masticate for 20 minutes, and then blend; add 5g of stearic acid , zinc oxide 7g, sulfur 2g, dibenzothiazole disulfide (DM) 4g, ultra-fine zinc powder 30g, model is the carbon black 5g of N330, is prepared into rubber compound, parks this rubber compound for 10 hours, then in The desired rubber composition can be obtained by vulcanizing on a flat vu...
Embodiment 2
[0056] Weigh 400g of NBR latex, slowly add 80g of 10% sodium hypophosphite, 40g of 10% copper sulfate, and add 1.5g of antioxidant WL under ultrasonic conditions. Adjust the pH value of the latex to 2 for flocculation, then repeatedly wash the flocculated latex with deionized water at 100°C, and dry it at 110°C for 2 hours to prepare nano-copper / nitrile rubber composites.
[0057] At 30°C, put 40g of butyl rubber, 50g of nano-copper / nitrile rubber composite material, and 10g of EPDM rubber into an open mixer, masticate for 20 minutes, and then blend; add 5g of stearic acid , zinc oxide 7g, sulfur 2g, dibenzothiazole disulfide (DM) 4g, ultra-fine zinc powder 30g, model is the carbon black 5g of N330, is prepared into rubber compound, parks this rubber compound for 10 hours, then in The desired rubber composition can be obtained by vulcanizing on a flat vulcanizing machine at a temperature of 100°C and a pressure of 18 MPa for 60 minutes. The effective temperature range of the ...
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