Rapid response of thermo-sensitive hydrogels with porous structures

Shingo Maeda, Terukazu Kato, Hikaru Kogure, Naoki Hosoya

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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
Issue number17
Publication statusPublished - 2015 Apr 27

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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