Modified silicone rubber containing CNTs (carbon nano tubes)-PDMS (polydimethylsiloxane) and preparation method of modified silicone rubber
A technology of dimethyl siloxane and carbon nanotubes, which is applied in the field of rubber materials, can solve the problems of rare thermal stability and achieve the effect of improving tensile strength and thermal stability
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Embodiment 1
[0030] Step 1. Mix 100 parts by weight of raw silicone rubber on a double roller at a temperature of 40°C for 10 minutes to make the SR raw rubber evenly stick to the roller;
[0031] Step 2. Add 40 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane, 2 parts by weight of polyvinyl silicone oil, 1 part by weight of carbon nanotube grafted polydimethylsiloxane, and 1 part by weight respectively. 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane, mixing for 15 minutes, mixing the rubber evenly to obtain a rubber compound;
[0032] Step 3. Load the rubber compound into 140×140×2mm 3 The mold is vulcanized by hot pressing for 5 minutes at a temperature of 200°C and a pressure of 12 MPa, and a vulcanized film is obtained after cooling.
Embodiment 2
[0034] Step 1. Mix 100 parts by weight of raw silicone rubber on a double roller at a temperature of 50°C for 1 min to make the SR raw rubber evenly stick to the roller;
[0035] Step 2: Add 40 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane, 3 parts by weight of polyvinyl silicone oil, 2 parts by weight of carbon nanotube grafted polydimethylsiloxane, and 0.5 parts by weight respectively. 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane, mix for 5-15min, mix the rubber evenly to obtain a rubber compound;
[0036] Step 3. Load the rubber compound into 140×140×2mm 3 The mold is vulcanized and molded by hot pressing for 15 minutes at a temperature of 160°C and a pressure of 5 MPa, and a vulcanized film is obtained after cooling.
Embodiment 3
[0038] Step 1. Put 100 parts by weight of raw silicone rubber on a double roller at a temperature of 45°C and mix for 5 minutes to make the SR raw rubber evenly stick to the roller;
[0039] Step 2: Add 40 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane, 2.5 parts by weight of polyvinyl silicone oil, 3 parts by weight of carbon nanotube grafted polydimethylsiloxane, and 0.8 parts by weight. 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane, mix for 10 minutes, mix the rubber evenly to obtain a rubber compound;
[0040] Step 3. Load the rubber compound into 140×140×2mm 3 The mold is vulcanized and molded by hot pressing for 10 minutes at a temperature of 170°C and a pressure of 10 MPa, and a vulcanized film is obtained after cooling.
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