Conductive liquid silicone rubber and preparation method and use thereof

A conductive liquid silicone rubber comprising a conductive filler that comprises single-walled carbon nanotubes;

• wherein the conductive liquid silicone rubber is prepared from raw materials comprising:
• a masterbatch of the conductive liquid silicone rubber, a Component I, a Component II, a catalyst, and an inhibitor;
• wherein the masterbatch is obtained by mixing a premix comprising single-walled carbon nanotubes and a base rubber;
• wherein the premix is obtained by pre-mixing the single-walled carbon nanotubes and a polyorganosiloxane;
• wherein the single-walled carbon nanotubes have a diameter of from 1 nm to 50 nm and a length of greater than 5 μm;
• wherein the Component I is one or a mixture of a plurality of compounds represented by Formula (1):
• wherein in Formula (1), n represents an integer from 0 to 100;
• m represents an integer from 70 to 4000;
• R represents a saturated hydrocarbyl;
• R1 represents an unsaturated hydrocarbyl;
• and R2 represents a saturated or unsaturated hydrocarbyl;
• wherein the Component II is one or a mixture of a plurality of compounds represented by Formulas (2) and/or (3):
• wherein in Formula (2), x represents an integer from 8 to 200;
• y represents an integer from 0 to 60;
• R3 represents methyl, hydrogen or SiH group;
• and R4 represents methyl, ethyl, propyl or phenyl;
• wherein in Formula (3), a represents an integer of 1 to 300;
• and R5 represents methyl, ethyl or hydrogen group;
• wherein, when the Component II consists essentially of only compound of Formula (2), the two conditions that y=0 and R3 is methyl do not exist at the same time;
• when the Component II consists essentially of only compound of Formula (3), R5 is hydrogen group;
• when the Component II is a mixture of the compounds of Formulas (2) and (3), at least one of the compounds of Formulas (2) and (3) has a SiH bond;
• wherein the catalyst is a Karstedt catalyst;
• and
• wherein the inhibitor is at least one selected from the group consisting of 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-ol, 3,5-dimethyl-1-hexyn-3-ol and 3-methyl-1-dodecyn-3-ol.

A method of preparing a conductive liquid silicone rubber, the method comprising the following steps:

• pre-mixing single-walled carbon nanotubes and a polyorganosiloxane to obtain a premix;
• mixing the premix and a base rubber to prepare a masterbatch;
• mixing the masterbatch, a catalyst, and at least one vinyl silicone oil, and vacuum degassing to obtain Component A;
• mixing the masterbatch, at least one vinyl silicone oil, at least one hydrogen-containing silicone oil, and at least one inhibitor, and vacuum degassing to obtain Component B;
• mixing said Component A and said Component B in equal proportions, and subjecting the mixture to curing;
• and
• vulcanizing to obtain the conductive liquid silicone rubber.