Solute retention and the states of water in polyethylene glycol and poly(vinyl alcohol) gels

Journal of Chromatography. a
Takayuki BabaKoichi Oguma

Abstract

The states of water sorbed in a cross-linked polyethylene glycol (PEG) gel, TSKgel Ether-250, and cross-linked poly(vinyl alcohol) (PVA) gels of different pore sizes, TSKgel Toyopearl HW-40S, 50S, 55S and 75S, were investigated by means of differential scanning calorimetry (DSC). It was found that there were three types of water in these hydrogels, non-freezing water, freezable bound water and free water. The amount of water that functions as the stationary phase in the column packed with the each gel was also estimated by a liquid chromatographic method. The estimated amount of the stationary phase water is in good agreement with the sum of the amount of non-freezing water and that of freezable bound water for HW-40S, 50S and 55S, while it agrees with the amount of only non-freezing water for HW-75S and Ether-250. This means that the stationary phase water consists of non-freezing water and freezable bound water for HW-40S, 50S and 55S, while only non-freezing water functions as the stationary phase in HW-75S and Ether-250 gels. This result can be attributed to the difference in the structure of the gels; the PVA gels containing PVA at relatively high concentrations, HW-40S, 50S and 55S, have a homogeneous gel phase, whereas H...Continue Reading

Citations

Jan 29, 2009·The Journal of Chemical Physics·Yurina Sekine, Tomoko Ikeda-Fukazawa
Jun 8, 2017·Journal of Separation Science·Fouzia AkterMasami Shibukawa
Aug 6, 2011·Physical Chemistry Chemical Physics : PCCP·Masami ShibukawaShingo Saito
Mar 13, 2018·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Fouzia AkterMasami Shibukawa
Mar 12, 2013·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kanae ItoToshio Yamaguchi
Dec 11, 2020·Journal of the American Chemical Society·Xing LiShengyi Dong

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