SANS study on rapid shrinking of comb-type poly(N-isopropylacrylamide) gels

Annaka Masahiko; M. Sugiyama; T. Matsuura; M. Hino; T. Fukunaga; Y. Hara; T. Okano

doi:10.1016/j.physb.2004.03.241

SANS study on rapid shrinking of comb-type poly(N-isopropylacrylamide) gels

Annaka Masahiko, M. Sugiyama, T. Matsuura, M. Hino, T. Fukunaga, Y. Hara, T. Okano

Physical Chemistry

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

2 Citations (Scopus)

Abstract

The shrinking mechanism of comb-type poly(N-isopropylacrylamide) (NIPA) gel was investigated by small-angle neutron scattering (SANS). The SANS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type NIPA gel during the shrinking process. This suggests that the freely mobiles grafted chains show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. These aggregations of the NIPA chains contribute to an increase in void volume, which allows the gel having a pathway of water.

Original language	English
Journal	Physica B: Condensed Matter
Volume	350
Issue number	1-3 SUPPL. 1
DOIs	https://doi.org/10.1016/j.physb.2004.03.241
Publication status	Published - Jul 15 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2004.03.241

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abstract = "The shrinking mechanism of comb-type poly(N-isopropylacrylamide) (NIPA) gel was investigated by small-angle neutron scattering (SANS). The SANS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type NIPA gel during the shrinking process. This suggests that the freely mobiles grafted chains show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. These aggregations of the NIPA chains contribute to an increase in void volume, which allows the gel having a pathway of water.",

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AU - Masahiko, Annaka

AU - Sugiyama, M.

AU - Matsuura, T.

AU - Hino, M.

AU - Fukunaga, T.

AU - Hara, Y.

AU - Okano, T.

PY - 2004/7/15

Y1 - 2004/7/15

N2 - The shrinking mechanism of comb-type poly(N-isopropylacrylamide) (NIPA) gel was investigated by small-angle neutron scattering (SANS). The SANS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type NIPA gel during the shrinking process. This suggests that the freely mobiles grafted chains show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. These aggregations of the NIPA chains contribute to an increase in void volume, which allows the gel having a pathway of water.

AB - The shrinking mechanism of comb-type poly(N-isopropylacrylamide) (NIPA) gel was investigated by small-angle neutron scattering (SANS). The SANS reveals that the microdomain structure with characteristic spacing of 460 A is developed in the comb-type NIPA gel during the shrinking process. This suggests that the freely mobiles grafted chains show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. These aggregations of the NIPA chains contribute to an increase in void volume, which allows the gel having a pathway of water.

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