Direct Interfacial Modification of Nanocellulose Films for Thermoresponsive Membrane Templates

Minna Hakalahti, Andreas Mautner, Leena Sisko Johansson, Tuomas Hänninen, Harri Setälä, Eero Kontturi, Alexander Bismarck, Tekla Tammelin*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

34 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2923-2927
Number of pages5
JournalACS Applied Materials and Interfaces
Volume8
Issue number5
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • cellulose nanofibrils
  • films
  • membranes
  • poly(N-isopropylacrylamide)
  • surface modification
  • thermoresponsive polymers

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