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| Preparation of Nanocellulose Porous Membrane by Solvent Exchange and Its Characterization |
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| DOI：10.11981/j.issn.1000-6842.2018.01.22 |
| Key Words:nanocellulose; solvent exchange; porous membrane |
| Author Name | Affiliation | | 龙克莹1 | 1. 天津科技大学化工与材料学院，天津，300457 | | 王华山1，* | 1. 天津科技大学化工与材料学院，天津，300457 | | 马晓红2,/sup> | 2. 吴忠市回民中学，宁夏吴忠，751100 | | 查瑞涛3 | 3. 国家纳米科学中心，北京，100190 |
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| Abstract: |
| Nanocellulose porous membranes with nanometer pore structure were prepared using nanofibrillated cellulose as raw material through vaccum filtration technology in combination with solvent exchange and drying. The effects of various solvents and drying methods on the surface morphology of the membranes were discussed. The nanocellulose membrane prepared through alcohol and tert-butanol stepwise dehydration and freeze drying method possessed an uniform distribution porosity of 42.95% (pore diameter was about 100~200 nm). The nanocellulose porous membranes with large pore diameter, high porosity, good wettability and thermal stability had great application potential in efficient filtration, biomedicine, analysis and detection fields. |
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