芳纶纤维毡增强二氧化硅气凝胶隔热材料的制备及其性能

打开文本图片集

中图分类号：TB332 文献标志码：A DOI：10.13338/j.issn.1674-649x.2025.01.011

Preparation and properties of silica aerogel insulation material reinforced by aramid fiber felt

WANG Liang，XIN Yi，CAO Yongping ，BIAN Tao，TAO Yi ，LI Yuxue （School of Materials Science and Engineering，Xi'an Polytechnic University，Xi'an 71Oo48，China）

Abstract In order to improve the mechanical properties of silica aerogel， silica aerogel composites were prepared by sol-gel atmospheric drying technique using aramid fiber felt as the substrate.They were characterized by infrared spectrum and X-ray diffraction，and their mechanical properties，thermal stability and flame retardancy were tested.The results showed that the prepared silica aerogels have excellent comprehensive properties，the particle size is 147.9μm ， the mass loss rate is 49.81% ，and the compressive strength is 2.03MPa ，which effectively improve the tensile strength of the aerogel composites. No further burning，melting and dripping occur during the flame retardancy test.The light weight and good thermal and mechanical properties of silica aerogel reinforced by aramid fiber mat make it have a wide application prospect in the field of thermal insulation.

Keywordssilica aerogel;aramid fiber felt；thermal insulation material

0引言

二氧化硅气凝胶被称为“凝固的烟”，是一种新型轻质纳米多孔材料，也是世界上密度最小的固体材料。（剩余11897字）