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Volume Collapse of a Cationic Poly(ethyleneimine) Gel Induced by the Binding of Anionic Surfactants by Etsuo Kokufuta; Hironori Suzuki; Ryo Yoshida; Fumitake Kaneko; Kazunori Yamada; Mitsuo Hirata is a Materials Science article available to read on EtoBox.

What is Volume Collapse of a Cationic Poly(ethyleneimine) Gel Induced by the Binding of Anionic Surfactants about?

A cationic polyelectrolyte gel was prepared by the crosslinking of poly(ethylenimine) (PEI; linear type) with ethylene glycol diglycidyl ether. The swelling characteristic of the PEI gel was investigated as a function of pH, kinds of surfactants, and their concentrations. Four different alkyl sulfate and sulfonates were used: sodium octyl sulfonate (SOS), sodium butyl sulfonate (SBS), sodium dodecyl sulfate (SDS), and sodium dodecylbenzen sulfonate (SDBS). The surfactant binding was also studied through the SDBS uptake by the gel at various concentrations and at pH 3. The following features were observed in the swelling experiments: (a) SDBS, SDS and SOS brought about a discontinuous gel collapse (i.e. volume transition), whereas the gel continuously shrunk with SBS, a behavior which is very close to that with NaCl; (b) the concentration leading to the transition was in the order SDBS BSDS BSOS, and shifted to a low concentration range when increasing the temperature; (c) the SDBS binding levelled off when the surfactants bound to about 40% of the total ionizable groups ( -NH -or -N ) in the gel, but almost three molecules of the surfactant anions bound to one binding site consisti

Who reads Volume Collapse of a Cationic Poly(ethyleneimine) Gel Induced by the Binding of Anionic Surfactants?

Author

Etsuo Kokufuta; Hironori Suzuki; Ryo Yoshida; Fumitake Kaneko; Kazunori Yamada; Mitsuo Hirata

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0927-7757)

Published

1999

Language

EN

Field

Materials Science (Physical Sciences)