Preparation and evaluation of temperature-responsive nanocellulose based filters

Minna Hakalahti, Tuomas Hänninen, Harri Setälä

    Research output: Contribution to conferenceConference PosterScientificpeer-review

    Abstract

    Filters play a vital role in development of environmentally friendly processes. Cellulose provides a biodegradable and versatile alternative for synthetic filter materials. In this study, different kinds of nanocellulosic materials were utilized to prep. stimuli-responsive filters for water purifn. Nanocellulosic materials were prepd. mech. from unmodified and TEMPO-oxidized pulp. TEMPO-oxidized cellulose contains a high amt. of carboxylic groups, which can be used to scavenge metal ions. Nanocelluloses were grafted using N-isopropylacrylamide (NIPAM) to introduce temp.-responsive functionalities. Poly(NIPAM) is a temp.-responsive polymer, which undergoes a change in hydration state at 32 °C. Solvent casting and coating methods were evaluated for prepn. of free-standing and support material-based filters, resp. Filter stability, permeate flux, morphol. and particle and ion retention were characterized.
    Original languageEnglish
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    Event245th ACS National Meeting and Exposition - New Orleans, United States
    Duration: 7 Apr 201311 Apr 2013
    Conference number: 245

    Conference

    Conference245th ACS National Meeting and Exposition
    CountryUnited States
    CityNew Orleans
    Period7/04/1311/04/13

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