Surface modification of different polymer fibres and membranes with poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide)-co-(N-hydroxymethylacrylamide)

Katri Mäkinen, Harri Setälä, Pekka Ruuskanen, Heikki Tenhu, Kati Salo

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


    Temperature sensitive polymer poly(N-isopropylacrylamide) and poly(N-isopropylacrylamide)-co-(N-hydroxymethylacrylamide ) grafted filter and membrane materials were produced and studied. Polyester and polypropylene multi-filament filter fabrics and polypropylene micro filtration membrane as well as polyethersulphone ultra filtration membrane were used as substrate materials. The surface modification of the substrates was carried out by activating the fabric surface with corona discharge treatment and polymerisation there after. The amount of the temperature sensitive polymer grafted on the substrate was determined by gravimetry and the surface morphology was analysed using SEM. The surface morphology was also analysed with FTIR-ATR spectroscopy. The amount of grafted polymer varies between 0,07 and 0,44 mg/cm2 on the polyester multi-filament filters. Based on the SEM-pictures, the grafted polymer seemed to localise mainly between the fibres, in fibre intersections and also in some occasions as spherical structures bound to the fibres. The results suggest that it is possible to produce membranes or filters in which the pore size and thus, the flow rate can be controlled by changing temperature. The studies have so far concentrated mainly on the surface modification of polyester and polypropylene multi-filament filter fabrics. However, the study will also be focused on the development of temperature sensitive functional membranes.
    Original languageEnglish
    Title of host publicationNAMS 2004 Program Book
    Subtitle of host publicationProgram Book and Proceedings
    PublisherNorth American Membrane Society
    Publication statusPublished - 2004
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event15th Annual Meeting - Honolulu, United States
    Duration: 26 Jun 200430 Jun 2004


    Conference15th Annual Meeting
    Country/TerritoryUnited States


    • surface modification
    • grafting
    • poly(N-isopropylacrylamide)-co-(N-hydroxymethylacrylamide)


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