▎ 摘　　要

NOVELTY - Flexible stretchable self-healing carbon-based polysiloxane-polyurea composite elastomer comprises polysiloxane-polyurea composite matrix (I) and carbon-based filler filled in the composite matrix. The carbon-based filler is sp2hybrid carbon material containing hydroxy functional groups, carboxy functional groups and/or amino functional groups and is single carbon material or combination of at least two carbon materials. USE - Used as flexible stretchable self-healing carbon-based polysiloxane-polyurea composite elastomer. ADVANTAGE - The carbon-based polysiloxane-polyurea composite elastomer: can achieve heat-assisted self-healing under synergy of flexible linear polysiloxane and multiple hydrogen bond structures; has excellent stretchability, thermal stability and triboelectric performance; and is suitable for industrial production. DETAILED DESCRIPTION - Flexible stretchable self-healing carbon-based polysiloxane-polyurea composite elastomer comprises polysiloxane-polyurea composite matrix of formula (I) and carbon-based filler filled in the composite matrix. The carbon-based filler is sp2hybrid carbon material containing hydroxy functional groups, carboxy functional groups and/or amino functional groups and is single carbon material or combination of at least two carbon materials. n = 10-270; and R = (1,5,5-trimethylcyclohexane-1,3-diyl)bis(methylene), 1,4-phenylenebis(methylene), benzene 1,4 diyl, 2 methyl benzene 1,3 diyl, 7-methoxy-7-oxoheptane-1,5-diyl, 4,4' methylenediphenyl or 4,4' methylene dicyclohexyl. An INDEPENDENT CLAIM is also included for preparing flexible stretchable self-healing carbon-based polysiloxane-polyurea composite elastomer, comprising (i) dissolving 10-80 pts. wt. bis(3-aminopropyl)-terminated polydimethylsiloxane in 30-200 pts. wt. organic solvent under ice bath and inert gas atmosphere condition and mixing in ice bath for 30-90 minutes to obtain polysiloxane solution, (ii) dissolving 0.5-20 pts. wt. diisocyanate in 10-100 pts. wt. organic solvent, then mixing, adding prepared mixed solution into polysiloxane solution obtained in step (i), constantly stirring and reacting to obtain polysiloxane-polyurea solution, where the mass ratio between bis(3-aminopropyl)-terminated polydimethylsiloxane and diisocyanate is greater than or equal to 1:1, (iii) first uniformly dispersing 0.05-20 pts. wt. carbon-based filler in 3-60 pts. wt. organic solvent to obtain carbon-based filler mixed solution, then slowly adding carbon-based filler mixed solution into polysiloxane-polyurea solution obtained in step (ii), and continuously stirring to completely mix carbon-based filler and polysiloxane polyurea to obtain mixed material, and (iv) pouring the mixed material obtained in step (iii) into a clean mold, volatilizing solvent and drying to obtain final product.