Determination of the elastic modulus of superabsorbent gel beads
Determination of the elastic modulus of superabsorbent gel beads
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DOI：
10.1016/s0966-7822(96)00034-2
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发表时间：
1997-01-01
期刊：
影响因子：
--
通讯作者：
Lequeux, F
中科院分区：
文献类型：
--
作者：
Knaebel, A;Rebre, SR;Lequeux, F
In this paper we present a new experimental device for measuring the contact force and the elastic modulus of small spherical particles. We have used a system of charged poly(acrylic acid) gel beads swollen with brine to investigate the variation of the shear modulus as a function of the swelling ratio and of the cross-link degree. Although the gel modulus varies similarly to the swelling ratio power -1/3, the gel modulus at swelling equilibrium exhibits a strong dependence on the swelling ratio with an exponent of -3.5. (C) 1997 Elsevier Science Limited.
