Electric conductive silicone rubber and preparation method thereof
A conductive silicon and silicone rubber technology, applied in the rubber field, can solve problems such as reducing the conductivity of silicone rubber, and achieve the effects of excellent electrical conductivity and high heat dissipation performance
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[0042] According to the method for preparing conductive silicone rubber according to an embodiment of the present invention, at least one of carbon nanotubes and graphene is modified, and then the two are mixed with silicone rubber and a vulcanizing agent to prepare a conductive silicone rubber with low The mixed rubber of the conductive threshold three-dimensional conductive network, and finally the mixed rubber is vulcanized to obtain a conductive silicone rubber with excellent tensile properties and conductive properties. Compared with the use of white carbon black in the prior art to improve the mechanical strength of silicone rubber, the application of graphene or carbon nanotubes can improve the mechanical properties of silicone rubber while improving its electrical conductivity, and the resulting conductive silicone rubber has a relatively high High heat dissipation performance.
[0043] In yet another aspect of the present invention, the present invention provides a co...
Embodiment 1
[0046] Plasma treatment of graphene: graphene oxide (GO, 0.5g / ml, 30ml) was added to urea 0.01g, after magnetic stirring for 30min, the reaction system was transferred to a PTFE-lined reactor for hydrothermal treatment at 160°C for 3h , freeze-dry after centrifuging and washing the black solid obtained to obtain nitrogen-doped graphene, then put the substrate of the graphene-loaded suspension (6mg / ml) into the coil of the quartz glass tube, vacuumize, and stabilize the air pressure at 30Pa Introduce a certain amount of hydrogen, turn on the radio frequency power supply after the airflow is stabilized at 50Pa, treat the graphene oxide suspension with hydrogen plasma (10ml / min) according to the discharge power of 80w for 10min, dry the treated liquid, and obtain plasma graphene;
[0047] Then hybrid carbon nanotubes, plasma graphene and silicone rubber (Mooney viscosity at room temperature is 15ML100 ℃ 1+4) and vulcanizing agent (double 2,5) were mixed at room temperature and 4MP...
Embodiment 2
[0049] Carrying out carbonylation treatment of carbon nanotubes: 100 g of carbon nanotubes were prepared into 60 ml of uniform ethanol dispersion liquid by ultrasonic treatment (1 h). Add dropwise hydrochloric acid to it to adjust the pH=3-4, continue to dropwise add 10ml of ethanol solution containing 0.3g KH570, place it at 60°C for 24 hours to react, the solid part is separated by centrifugation, washed with a large amount of ethanol until pH=7, and hydroxyl carbon nanotubes;
[0050] Hydroxylation treatment of graphene: graphene 1g, sodium hydroxide 20g, absolute ethanol 2000ml, overnight ball milling to obtain hydroxylated graphene;
[0051] Then hydroxylated carbon nanotubes, hydroxylated graphene and silicone rubber (Mooney viscosity at room temperature is 15ML100 °C 1+4) and vulcanizing agent (double 2,5) were mixed at room temperature and 4MPa, wherein, based on 100g of silicone rubber, the amount of carbonylated carbon nanotubes is 2g, the amount of carbonylated gra...
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