Dodecyl methacrylate as a crosslinker in the preparation of tough polyacrylamide hydrogels
Dodecyl methacrylate as a crosslinker in the preparation of tough polyacrylamide hydrogels
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DOI：
10.1016/j.polymer.2010.12.044
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发表时间：
2011-02-03
期刊：
影响因子：
4.6
通讯作者：
Okay, Oguz
中科院分区：
文献类型：
--
作者：
Abdurrahmanoglu, Suzan;Cilingir, Miray;Okay, Oguz
丙烯酰胺与甲基丙烯酸十二烷基酯（C12）溶解在十二烷基硫酸钠的胶束水溶液中的共聚产生坚韧水凝胶，表现出约1千帕的弹性模量。溶胀和凝胶分数的测量表明，作为临时交联的疏水缔合太强，在凝胶网络的膨胀过程中在水中被破坏。与常规水凝胶相比，使用疏水物C12形成的水凝胶的损耗因子tan δ值大一个数量级，表明其交联区的动态性质。的水凝胶是更均匀的比相应的凝胶制备的化学交联剂，由静态光散射测量确定。机械测试表明，除了十二烷基结构域之外，还需要永久交联以获得机械稳定性高达250%伸长率的水凝胶。(C)2010爱思唯尔有限公司版权所有。
Copolymerization of acrylamide with dodecyl methacrylate (C12) solubilized in aqueous micelles of sodium dodecyl sulfate produces tough hydrogels exhibiting moduli of elasticity around 1 kPa. Swelling and gel fraction measurements show that the hydrophobic associations acting as temporary crosslinks are too strong to be destroyed in water during the expansion of the gel network. An order of magnitude larger value of loss factor tan delta of the hydrogels formed using the hydrophobe C12 as compared to the conventional hydrogels indicates the dynamic nature of their crosslink zones. The hydrogels are more homogeneous than the corresponding gels prepared by a chemical crosslinker, as determined by the static light scattering measurements. Mechanical tests indicate that, in addition to the dodecyl domains, permanent crosslinks are also needed to obtain hydrogels that are mechanically stable up to 250% elongation ratios. (C) 2010 Elsevier Ltd. All rights reserved.