文献类型：期刊文献

英文题名：The Effect of Drying Methods on the Pore Structure of Balsa Wood Aerogels

作者：Yin, Min[1,2] Fu, Zongying[2] Yu, Xia[1,2] Wang, Ximing[1] Lu, Yun[2]

第一作者：Yin, Min

通信作者：Wang, XM[1];Lu, Y[2]

机构：[1]Inner Mongolia Agr Univ, Coll Mat Sci & Art Design, Hohhot 010018, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Key Lab Wood Sci & Technol Natl Forestry & Grassla, Beijing 100091, Peoples R China

年份：2025

卷号：17

期号：12

外文期刊名：POLYMERS

收录：;EI(收录号：20252618675186);Scopus(收录号：2-s2.0-105008995388);WOS:【SCI-EXPANDED(收录号:WOS:001515035400001)】；

基金：We acknowledge funding support from the National Natural Science Foundation of China (Grant No. 32371797), the Natural Science Foundation Project of Inner Mongolia Autonomous Region (Grant No. 2022MS03001), and the Science and Technology Program Project of Inner Mongolia Autonomous Region (Grant No. 2022YFHH0134).

语种：英文

外文关键词：wood aerogel; drying methods; pore structure; thermal conductivity

摘要：Drying constitutes an essential step in aerogel fabrication, where the drying method directly determines the pore structure and consequently influences the material's functionality. This study employed various drying techniques to prepare balsa-wood-derived aerogels, systematically investigating their effects on microstructure, density, and performance characteristics. The results demonstrate that different drying methods regulate aerogels through distinct pore structure modifications. Supercritical CO2 drying optimally preserves the native wood microstructure, yielding aerogels with superior thermal insulation performance. Freeze-drying induces the formation of ice crystals, which reconstructs the microstructure, resulting in aerogels with minimal density, significantly enhanced permeability, and exceptional cyclic water absorption capacity. Vacuum drying, oven drying, and natural drying all lead to significant deformation of the aerogel pore structure. Among them, oven drying increases the pore quantity of aerogels through volumetric contraction, thereby achieving the highest specific surface area. However, aerogels prepared by air drying have the highest density and the poorest thermal insulation performance. This study demonstrates that precise control of liquid surface tension during drying can effectively regulate both the pore architecture and functional performance of wood-derived aerogels. The findings offer fundamental insights into tailoring aerogel properties through optimized drying processes, providing valuable guidance for material design and application development.