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 language | English |
|---|---|
| Pages (from-to) | 201-207 |
| Number of pages | 7 |
| Journal | Colloids and Surfaces B: Biointerfaces |
| Volume | 38 |
| Issue number | 3-4 SPEC. ISS. |
| DOIs | |
| Publication status | Published - Nov 15 2004 |
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All Science Journal Classification (ASJC) codes
- Biotechnology
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry
Cite this
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 journal › Article
}
TY - JOUR
T1 - Study on the rapid deswelling mechanism of comb-type N-isopropylacrylamide gels
AU - Annaka, M.
AU - Matsuura, T.
AU - Yoshimoto, E.
AU - Taguchi, H.
AU - Sasaki, S.
AU - Sugiyama, M.
AU - Hara, Y.
AU - Okano, T.
PY - 2004/11/15
Y1 - 2004/11/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=8144223341&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=8144223341&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfb.2004.03.021
DO - 10.1016/j.colsurfb.2004.03.021
M3 - Article
C2 - 15542326
AN - SCOPUS:8144223341
VL - 38
SP - 201
EP - 207
JO - Colloids and Surfaces B: Biointerfaces
JF - Colloids and Surfaces B: Biointerfaces
SN - 0927-7765
IS - 3-4 SPEC. ISS.
ER -