Preparation and Characterization of Silicon Carbide Micro/Nano Fibrous Mat Reinforced Silica Aerogel Composites
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 fibrou...
| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2018-11-01
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| Series: | Journal of Materials Engineering |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2018/V46/I11/45 |
| Summary: | 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 1.7<i>μ</i>m, the transverse tensile strength is 0.6MPa, and elongation is 6.0%. SiC micro/nano fibrous mat and SiO<sub>2</sub> aerogel matrix have better compatibility, the hydrophobic angle of SiC/SiO<sub>2</sub> aerogel composites is 132°, specific surface area is 241.8m<sup>2</sup>/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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| ISSN: | 1001-4381 1001-4381 |