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    Université de Fribourg

    Deswelling microgel particles using hydrostatic pressure

    Lietor-Santos, Juan-Jose ; Sierra-Martin, Benjamin ; Vavrin, Ronny ; Hu, Zhibing ; Gasser, Urs ; Fernandez-Nieves, Alberto

    In: Macromolecules, 2009, vol. 42, no. 16, p. 6225–6230

    We report on the use of hydrostatic pressure, P, to deswell thermosensitive poly(N-isopropylacrylamide) (pNIPAM) microgels and show that it can affect the polymer−solvent mixing as much as temperature, which is the traditional variable used to deswell pNIPAM particles. Interestingly, the microgel volume changes more gradually with pressure than it does with temperature. By comparing the...