Swelling properties of thin-plate hydrogels under mechanical constraint

被引：12

作者：

Suzuki, A ^{[1
]}

Wu, XR ^{[1
]}

Kuroda, M ^{[1
]}

Ishiyama, E ^{[1
]}

Kanama, D ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Mat Sci, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2003年 / 42卷 / 2A期

关键词：

polymer gel; one-dimensional swelling; mechanical constraint; chemical constraint; equation of states of gels; swelling kinetics;

D O I：

10.1143/JJAP.42.564

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The static swelling ratio of thin-plate poly(N-isopropylacylamide) (NIPA) gel was studied under mechanical constraint; one surface is mechanically and chemically clamped on a glass plate, therefore the gel can swell and shrink only along a one-dimensional thickness-direction. The equilibrium thickness was measured as functions of temperature including the volume phase transition point. Compared with the free NIPA gel without mechanical constraint, the transition temperature slightly increased, and the total volume decreased (or increased) below (or above) 30degreesC. The swelling ratio in the swollen state was found to depend on the thickness at gelation. The results were compared with the equation of states of gels on the basis of the Flory-type theory. In addition, the swelling and shrinking kinetics between two different swollen states were studied by measuring the temporal evolution of the thickness in response to the abrupt temperature change. The power of the kinetics was compared with that of the free NIPA gels as well as that of the thin-plate NIPA gels with two opposing surfaces clamped.

引用

页码：564 / 569

页数：6

共 25 条

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