The effects of various carbon fiber additions on the performance of SiO2 aerogel composite thermal insulation panels were investigated using SiO2 aerogel,cementitious,and glass beads as additives.The structures and properties of the composites were characterized using BET,FT-IR,thermal conductivity analysis,and density analysis test methods.The results of the experiment demonstrated that the addition of carbon fibers did not alter the pore structure of the composites or cause chemical changes in the inner part of the composites,preserving the excellent characteristics of the porous structure of aerogel insulation materials.However,with the increase of the addition of carbon fibers,it caused the changes of the specific surface area,density and thermal conductivity of the composites.When the addition of carbon fibers was 1% (wt,mass fraction),the composites had the lowest thermal conductivity,relatively large pore size and pore capacity and high density,which had a strengthening effect on the composite.
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基金资助
国家自然科学基金面上项目(51976205)
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