SODIUM CHLORIDE-INDUCED PHASE-TRANSITION IN NONIONIC POLY(N-ISOPROPYLACRYLAMIDE) GEL

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A nonionic poly(N-isopropylacrylamide) hydrogel, which exhibits a temperature-dependent volume phase transition (lower critical solution temperature, LCST) behavior in aqueous solution, demonstrates an unusual sodium chloride-induced phase transition phenomenon as well. The gel collapses sharply at critical sodium chloride concentration, which depends on the temperature. Other salts tested show no such behavior, and typical salting-out behaviors (the gradual gel collapse with increasing their concentration) were observed. It appears that chloride ions play a major role in this phase transition.
Publisher
AMER CHEMICAL SOC
Issue Date
1993
Language
English
Article Type
Article
Keywords

IONIC GELS

Citation

MACROMOLECULES, v.26, no.19, pp.5045 - 5048

ISSN
0024-9297
DOI
10.1021/ma00071a010
URI
http://hdl.handle.net/10203/12986
Appears in Collection
BS-Journal Papers(저널논문)
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