O2等离子体改性玻璃纤维增强SiO2气凝胶复合材料的制备及表征

摘要/Abstract

摘要： 为了制备得到性能优异的疏水SiO₂气凝胶复合材料,以O₂等离子体处理的玻璃纤维作为增强相,结合溶胶-凝胶法和超临界CO₂干燥工艺制备SiO₂气凝胶复合材料并对复合材料的结构、表面基团、疏水性、热稳定性以及绝热、力学性能进行表征。结果一方面表明O₂等离子体处理改善了玻璃纤维与SiO₂气凝胶的结合能力,使复合材料具有更加优异的绝热性能和力学性能;另一方面表明疏水改性后的O₂等离子体处理玻璃纤维增强的SiO₂气凝胶复合材料在MTMS与TEOS比例为0.4∶1时,具有低密度(0.228 g/cm³)、低导热率(0.0214 W/m·K)、高孔隙率(80.0%)、高比表面积(741.66 m²·g^-1)、高疏水角(129.2°)以及高抗压强度(σ_20%=152.88 kPa)的特点。这些优异的性能促进了O₂等离子体处理玻璃纤维增强的SiO₂气凝胶复合材料在绝热领域更加广泛的应用。

关键词: O₂等离子体, SiO₂气凝胶, 玻璃纤维, 复合材料

Abstract: In order to prepare the hydrophobic silica aerogel composite with excellent performance, we used oxygen plasma treated glass fiber as the reinforcing phase, combined with sol-gel method and supercritical CO₂ drying process to prepare silica aerogel composite and characterized the structure, surface group, hydrophobicity, thermal and mechanical properties of the composites. On the one hand, the results showed that oxygen plasma treatment enhanced thermal insulation and mechanical performance of the composites by improving the bonding ability of glass fiber and silica aerogel. On the other hand, the results showed that the hydrophobic silica aerogel composite reinforced by oxygen plasma treated glass fiber had low density (0.228 g/cm³), low thermal conductivity (0.0214 W/m·K), high porosity (80.0%) , high specific surface area (741.66 m²·g^-1), high hydrophobic angle (129.2°) and high compressive strength (σ_20%=152.88 kPa) when the ratio of MTMS to TEOS is 0.4∶1. These excellent performances indicated that silica aerogel composites reinforced by oxygen plasma treated glass fiber have broad applications prospects in the field of thermal insulation.

Key words: oxygen plasma, silica aerogel, glass fiber, composites

中图分类号:

TB332

田佳琦, 谭慧君, Sameera Shafi, 赵亚平. O₂等离子体改性玻璃纤维增强SiO₂气凝胶复合材料的制备及表征[J]. 复合材料科学与工程, 2020, 0(7): 45-52.

TIAN Jia-qi, TAN Hui-jun, Sameera Shafi, ZHAO Ya-ping. PREPARATION AND CHARACTERIZATION OF SILICA AEROGEL COMPOSITE REINFORCED BY OXYGEN PLASMA MODIFIED GLASS FIBER[J]. Composites Science and Engineering, 2020, 0(7): 45-52.

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O₂等离子体改性玻璃纤维增强SiO₂气凝胶复合材料的制备及表征

PREPARATION AND CHARACTERIZATION OF SILICA AEROGEL COMPOSITE REINFORCED BY OXYGEN PLASMA MODIFIED GLASS FIBER

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