Rapid response of thermo-sensitive hydrogels with porous structures

Shingo Maeda, Terukazu Kato, Hikaru Kogure, Naoki Hosoya

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Poly(N-isopropylacrylamide)(PNIPAAm) hydrogel is thermo-sensitive, and undergoes a volume phase transition from a swollen state to a shrunken state. Typically, after immersing poly(N-isopropylacrylamide) hydrogels into hot water above the critical temperature, they undergo a two-step shrinking process, which leads to very slow dynamics. However, potential applications, including soft actuators, drug delivery systems, and cell cultures, demand a quick response. Herein, we synthesize chemically crosslinked PNIPAAm porous hydrogels made of nanofiber mats. Our hydrogels rapidly shrink without the two-step shrinking. The response of this porous gel is over 100 times faster than that of the typical gel.

Original languageEnglish
Article number171909
JournalApplied Physics Letters
Volume106
Issue number17
DOIs
Publication statusPublished - 2015 Apr 27

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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