Direct measurement of crosslinked surface layer in superabsorbent poly(acrylic acid)

Jisoo Ha,Minsu Kim,Wooseop Lee,Hoyeon Lee,Changsun Han,Won Gun Koh,Du Yeol Ryu

Materials Letters（2018）

Cited 8|Views9

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Abstract

•Poly(acrylic acid)-based superabsorbent polymer (SAP) materials were further surface-crosslinked.•A simple and quantitative method to measure thickness of crosslinked surface layer (tx).•Rhodamine B (RhB) adsorption into cross-sectional SAP networks due to electrostatic attraction.•The tx defined by the discrete intermediate layers in fluorescent intensities.

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Key words

Crosslinked surface layer,Superabsorbent polymer,Fluorescence microscopy,Electrostatic attraction

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