Fabrication of highly ordered porous membranes of cellulose triacetate on ice substrates using breath figure method |
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| Authors: | Bing Yu Hailin Cong Zejing Li Hua Yuan Qiaohong Peng Ming Chi Shujing Yang Ruixia Yang S. Ranil Wickramasinghe Jianguo Tang |
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| Affiliation: | 1. Department of Material Science and Engineering, College of Chemical Engineering, Qingdao University, Qingdao, China;2. Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University, China;3. Department of Chemical Engineering, University of Arkansas, Fayetteville, Arkansas |
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| Abstract: | Highly ordered porous membranes of cellulose triacetate (CTA) were prepared successfully on ice substrates using breath figure method. The pore size and structure of the membrane were modulated by changing CTA concentrations and substrate materials. As the CTA concentration in the casting solution increased, the pore size in the formed membrane decreased. The regularity of the membrane cast on the ice substrate was much better than that of the membrane cast on glass substrate, because the low temperature of ice substrate slowed down the evaporation rate of organic solvent, which offered enough time for condensed water droplets to self‐organize into an ordered array dispersed in the polymer solution before their coagulation. The ordered porous CTA membrane was not only used for microfiltration, but also used for fabrication of functional microstructures. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015 , 53, 552–558 |
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| Keywords: | interface membranes microfabrication microfiltration microstructure ordered structures self‐assembly templates |
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