Study on the rapid deswelling mechanism of comb-type N-isopropylacrylamide gels

M. Annaka, T. Matsuura, E. Yoshimoto, H. Taguchi, S. Sasaki, M. Sugiyama, Y. Hara, T. Okano

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The shrinking mechanism of comb-type grafted poly(N-isopropylacrylamide) gel was investigated by fluorescence spectroscopy and small-angle X-ray Scattering (SAXS). The SAXS reveals that the microdomain structure with characteristic dimension of 460 Å is developed in the comb-type grafted poly(N-isopropylacrylamide) gel during the shrinking process. Fluorescence spectroscopy together with SAXS observation suggests that the freely mobile characteristics of the grafted chains are expected to show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. The dehydrated grafted chains created the hydrophobic cores, which enhance the hydrophobic aggregation of the networks. These aggregations of the NIPA chains contribute to an increase in void volume, which allow the gel having a pathway of water molecules by the phase separation.

Original languageEnglish
Pages (from-to)201-207
Number of pages7
JournalColloids and Surfaces B: Biointerfaces
Volume38
Issue number3-4 SPEC. ISS.
DOIs
Publication statusPublished - Nov 15 2004

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Comb and Wattles
X ray scattering
Agglomeration
Gels
Fluorescence Spectrometry
Fluorescence spectroscopy
X-Rays
gels
scattering
Dehydration
Grafts
Phase separation
fluorescence
x rays
globules
Observation
dehydration
spectroscopy
Transplants
voids

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Annaka, M., Matsuura, T., Yoshimoto, E., Taguchi, H., Sasaki, S., Sugiyama, M., ... Okano, T. (2004). Study on the rapid deswelling mechanism of comb-type N-isopropylacrylamide gels. Colloids and Surfaces B: Biointerfaces, 38(3-4 SPEC. ISS.), 201-207. https://doi.org/10.1016/j.colsurfb.2004.03.021

Study on the rapid deswelling mechanism of comb-type N-isopropylacrylamide gels. / Annaka, M.; Matsuura, T.; Yoshimoto, E.; Taguchi, H.; Sasaki, S.; Sugiyama, M.; Hara, Y.; Okano, T.

In: Colloids and Surfaces B: Biointerfaces, Vol. 38, No. 3-4 SPEC. ISS., 15.11.2004, p. 201-207.

Research output: Contribution to journalArticle

Annaka, M, Matsuura, T, Yoshimoto, E, Taguchi, H, Sasaki, S, Sugiyama, M, Hara, Y & Okano, T 2004, 'Study on the rapid deswelling mechanism of comb-type N-isopropylacrylamide gels', Colloids and Surfaces B: Biointerfaces, vol. 38, no. 3-4 SPEC. ISS., pp. 201-207. https://doi.org/10.1016/j.colsurfb.2004.03.021
Annaka, M. ; Matsuura, T. ; Yoshimoto, E. ; Taguchi, H. ; Sasaki, S. ; Sugiyama, M. ; Hara, Y. ; Okano, T. / Study on the rapid deswelling mechanism of comb-type N-isopropylacrylamide gels. In: Colloids and Surfaces B: Biointerfaces. 2004 ; Vol. 38, No. 3-4 SPEC. ISS. pp. 201-207.
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