Direct Interfacial Modification of Nanocellulose Films for Thermoresponsive Membrane Templates

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• 作者：Minna Hakalahti ; Andreas Mautner ; Leena-Sisko Johansson ; Tuomas H?nninen ; Harri Set?l? ; Eero Kontturi ; Alexander Bismarck ; Tekla Tammelin
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 10, 2016
• 年：2016
• 卷：8
• 期：5
• 页码：2923-2927
• 全文大小：376K
• ISSN：1944-8252

文摘

This letter proposes a strategy to construct tunable films combining the physical characteristics of cellulose nanofibrils and smart polymers for membrane applications. A functional membrane template was obtained by first fabricating a water stable film from cellulose nanofibrils and subsequently surface grafting it with a thermoresponsive polymer, poly(N-isopropylacrylamide). The behavior of the membrane template was dependent on temperature. The increment in slope of relative water permeance around the lower critical solution temperature of poly(N-isopropylacrylamide) increased from 18 to 100% upon polymer attachment. Although the membrane template essentially consisted of wood-based materials, the benefits of smart synthetic polymers were achieved.