Flexible and amorphous silicon carbide micro/nano fibrous mats were prepared by electrospinning technology with polycarbosilane(PCS)as the precursor to prepare PCS micro/nano fibrous mats and followed by cross-linking and high temperature heat treatment process. The silicon carbide micro/nano fibrous mats reinforced silica aerogel composites (silicon carbide/silica aerogel) were prepared by using the SiC as the reinforcing material, and combining the sol-gel and super-critical drying technology. The results show that the average diameter of SiC fiber mats is about 1.7μm, the transverse tensile strength is 0.6MPa, and elongation is 6.0%. SiC micro/nano fibrous mat and SiO2 aerogel matrix have better compatibility, the hydrophobic angle of SiC/SiO2 aerogel composites is 132°, specific surface area is 241.8m2/g and the mean pore diameter is 12.0nm. SiC micro/nano fibrous mats strengthen the toughness of aerogel while maintaining its good thermal insulation and hydrophobic properties.
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