The Preparation and Characterization of Spherical Cellulose Aerogels with Core-shell Structure

摘要：

　　The spherical cellulose aerogels with core-shell structure were prepared through hanging drop method in a regenerated non-polar solution.The procedures of these aerogels preparation include solidification in the acetic acid solution to form a hydrogel, solvent exchange with t-butyl alcohol and fi eeze drying.The spherical cellulose aerogeis were obtained with different cellulose solution concentration, and characterized with BET analysis and electron microscopy.Their density and porosity varied linearly with different cellulose content in the initial solution.And the gel shrinkage upon drying was limited to, on average, 7.3%.The density of spherical cellulose aerogel could be reached down to 0.14 g.cm-3 with high specific surface areas up to 210 m2·g-1.The mesopores diameter of spherical cellulose aerogel at the highest peak in the size distribution curve is focus on 15nm.

关键词： Cellulose aerogels, Core-shell structure Structure analysis

作者: Peng Wu Zhi-ming Liu Jian Li

作者单位: College of Materials Science and Engineering, Northeast Forestry University, Harbin, China

会议类型: 国际会议

会议名称: The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)

会议地点: 哈尔滨

会议语种:英文

页码: 701-707

在线出版日期: 2013-08-23（万方平台首次上网日期，不代表论文的发表时间）