Effects of reinforced fibers on thermal and mechanical properties of aerogel composites for thermal insulation

WU Hui-jun , HU Huan-yi , LIAO Yun-dan , DING Yun-fei , ZHOU Xiao-qing

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Journal of Guangzhou University(Natural Science Edition) ›› 2014, Vol. 13 ›› Issue (2) : 66-70.

Effects of reinforced fibers on thermal and mechanical properties of aerogel composites for thermal insulation

  • WU Hui-juna,b, HU Huan-yia, LIAO Yun-dana, DING Yun-feia, ZHOU Xiao-qinga,b
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Abstract

Monolithic aerogel composites with stable structures were successfully prepared by adding three types of fibers(viz., aligned glass monofilaments, polyester fibrous battings and electrospun polyvinylidene fluoride micro/nano fibers)into silica sols and following drying at ambient pressure. Effect of the types and diameters of the reinforced fibers on the structure, thermal conductivity and mechanical properties of the aerogel composites were investigated. The results showed that the monolithic aerogel composites had low thermal conductivities of 0.025~0.028 W·m-1·K-1 close to that of still air. The compressive strength could be 3~4 times higher than that of the pure aerogels. Moreover, the monolithic aerogel composites reinforced by micro/nano electrospun polyvinylidene fluoride fibers had better flexibility and integrity.

Key words

aerogels / thermal insulation materials / strength / flexibility / electrospinning

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WU Hui-jun , HU Huan-yi , LIAO Yun-dan , DING Yun-fei , ZHOU Xiao-qing. Effects of reinforced fibers on thermal and mechanical properties of aerogel composites for thermal insulation. Journal of Guangzhou University(Natural Science Edition). 2014, 13(2): 66-70

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