INFLUENCE OF TEMPERATURE ON SWELLING AND MECHANICAL-PROPERTIES OF A SULFOBETAINE HYDROGEL
INFLUENCE OF TEMPERATURE ON SWELLING AND MECHANICAL-PROPERTIES OF A SULFOBETAINE HYDROGEL
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DOI：
10.1016/0032-3861(91)90538-t
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发表时间：
1991-01-01
期刊：
影响因子：
4.6
通讯作者：
REGO, JM
中科院分区：
文献类型：
--
作者：
HUGLIN, MB;REGO, JM
以两性离子单体N，N-二甲基-N-甲基丙烯酰氧乙基-N-（3-磺丙基）甜菜碱铵与乙二醇二甲基丙烯酸酯交联而成的水凝胶，测定了其溶胀和力学性能随温度的变化。已经发现体积溶胀随温度略微降低。另一方面，杨氏模量以及实验交联密度随温度增加。所得到的结果已被解释，通过检查随温度的变化的偏摩尔吉布斯自由能的稀释结合其焓和熵的贡献的变化。
The swelling and mechanical properties of a hydrogel based on the zwitterionic monomer N,N-dimethyl-N-methacryloyloxyethyl-N-(3-sulphopropyl)ammonium betaine crosslinked with ethylene glycol dimethacrylate have been determined as a function of temperature. The volumetric swelling has been found to decrease slightly with temperature. On the other hand, the Young's modulus as well as the experimental crosslink density increase with temperature. The results obtained have been explained by examining the changes with temperature of the partial molar Gibbs free energy of dilution in conjunction with the variation of its enthalpic and entropic contributions.