Preparation and structural characteristics of stimuli-responsive hydrogel microsphere

Yoshiyuki Nakazawa; Yukiko Kamijo; Keiji Fujimoto; Haruma Kawaguchi; Yoshiaki Yuguchi; Hiroshi Urakawa; Kanji Kajiwara

doi:10.1002/apmc.1996.052400117

Preparation and structural characteristics of stimuli-responsive hydrogel microsphere

Yoshiyuki Nakazawa, Yukiko Kamijo, Keiji Fujimoto, Haruma Kawaguchi, Yoshiaki Yuguchi, Hiroshi Urakawa, Kanji Kajiwara

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Monodisperse hydrogel microspheres were prepared by precipitation polymerization from acrylamide (AAm), methylenebisacrylamide (MBAAm) and methacrylic acid (MAc) in ethanol, and examined their stimuli response by changing pH or temperature. The microsphere was found to contract continuously by heating. The microsphere with a lower-content MBAAm exhibit more pronounced heat-contraction. Also at low pH the microsphere contracted due to the protonation of the carboxyl group in MAc. The internal structure was observed by small angle X-ray scattering (SAXS) and the stimuli-response mechanism was discussed from the view of network chain conformation.

Original language	English
Pages (from-to)	187-196
Number of pages	10
Journal	Angewandte Makromolekulare Chemie
Volume	240
DOIs	https://doi.org/10.1002/apmc.1996.052400117
Publication status	Published - 1996 Aug

ASJC Scopus subject areas

Materials Science(all)

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10.1002/apmc.1996.052400117

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T1 - Preparation and structural characteristics of stimuli-responsive hydrogel microsphere

AU - Nakazawa, Yoshiyuki

AU - Kamijo, Yukiko

AU - Fujimoto, Keiji

AU - Kawaguchi, Haruma

AU - Yuguchi, Yoshiaki

AU - Urakawa, Hiroshi

AU - Kajiwara, Kanji

PY - 1996/8

Y1 - 1996/8

N2 - Monodisperse hydrogel microspheres were prepared by precipitation polymerization from acrylamide (AAm), methylenebisacrylamide (MBAAm) and methacrylic acid (MAc) in ethanol, and examined their stimuli response by changing pH or temperature. The microsphere was found to contract continuously by heating. The microsphere with a lower-content MBAAm exhibit more pronounced heat-contraction. Also at low pH the microsphere contracted due to the protonation of the carboxyl group in MAc. The internal structure was observed by small angle X-ray scattering (SAXS) and the stimuli-response mechanism was discussed from the view of network chain conformation.

AB - Monodisperse hydrogel microspheres were prepared by precipitation polymerization from acrylamide (AAm), methylenebisacrylamide (MBAAm) and methacrylic acid (MAc) in ethanol, and examined their stimuli response by changing pH or temperature. The microsphere was found to contract continuously by heating. The microsphere with a lower-content MBAAm exhibit more pronounced heat-contraction. Also at low pH the microsphere contracted due to the protonation of the carboxyl group in MAc. The internal structure was observed by small angle X-ray scattering (SAXS) and the stimuli-response mechanism was discussed from the view of network chain conformation.

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Preparation and structural characteristics of stimuli-responsive hydrogel microsphere

Abstract

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