Liu Xiaoting ¹, Yang Hui ^{1, 2}, Shen Qianhong ^{1, 2}, Sheng Jiansong ^{1, 2}, Guo Xingzhong ^{1, 2}

(1. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China; 2. Research Institute of Zhejiang University-Taizhou, Taizhou 318000, Zhejiang, China)

Abstract: With α-cellulose as raw material, the cellulose aerogel was prepared by dissolving α-cellulose in ionic liquid (1-allyl-3-methyl imidazole chloride salt, AMIMCl), regenerated in acetic acid aqueous solutions and subsequently freeze-dried, and the effect of acetic acid concentration of regeneration solution on the morphology of cellulose aerogel was investigated. The results show that the adjustment of acetic acid concentration can control the morphology of cellulose aerogel. The network of cellulose aerogel changes from flaky network structure to fibrous network structure with the increase of acetic acid concentration. When the concentration of acetic acid is 80%, the resultant cellulose aerogel possesses a specific area as high as 156.7 m²/g and good thermal stability. After carbonization at 900 ℃, the conductivity of aerogels greatly improved, which is 4.67 S/m.
Key words: cellulose aerogel; acetic acid; structure; properties