气凝胶
膜蒸馏
膜
多孔性
纳米纤维素
材料科学
相位反转
热导率
化学工程
磁导率
细菌纤维素
纤维素
复合材料
作者
Megan E. Leitch,Chenkai Li,Olli Ikkala,Meagan S. Mauter,Gregory V. Lowry
出处
期刊:Environmental Science and Technology Letters
[American Chemical Society]
日期:2016-02-09
卷期号:3 (3): 85-91
被引量:77
标识
DOI:10.1021/acs.estlett.6b00030
摘要
We fabricated, characterized, and tested novel fibrous aerogel membranes in direct contact membrane distillation (MD) to elucidate the effects of a model high-porosity membrane material on MD performance. Unsupported bacterial nanocellulose aerogels exhibit higher porosity, thinner fibers, and lower bulk thermal conductivity than any previously reported MD materials. Modeling and experiments demonstrate that these material properties confer significantly higher intrinsic membrane permeability and thermal efficiency than symmetric PVDF phase inversion membranes with lower porosity. Development of macroporous fibrous membranes with aerogel-like porosity and thermal conductivity (>98% and <0.03 W m–1 K–1, respectively) in thinner-film formats may further improve MD flux.
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