Molecularweight effects on tensile properties of blend hydrogels composed of clay and polymers
Molecularweight effects on tensile properties of blend hydrogels composed of clay and polymers
复制标题
DOI：
10.1016/j.polymer.2016.01.008
复制
发表时间：
2016-02-24
期刊：
影响因子：
4.6
通讯作者：
Kimura, Yuri
中科院分区：
文献类型：
--
作者：
Takeno, Hiroyuki;Kimura, Yuri
具有机械韧性的水凝胶已经引起了许多研究人员的注意，但其机制仍然知之甚少。本文通过简单混合制备了粘土/聚丙烯酸钠和粘土/聚丙烯酰胺两种共混水凝胶，研究了分子量对共混水凝胶拉伸性能的影响，以阐明影响共混水凝胶力学韧性的关键因素。前者的弹性模量远高于后者，而后者的延伸率远高于前者。已经发现，使用具有高于几百万的分子量的聚合物对于获得共混水凝胶的高延展性是必要的。从这项研究中已经澄清，所有以下三个因素，（i）使用高分子量聚合物，（ii）粘土颗粒的分散和（iii）粘土和聚合物的有利相互作用对于制造具有机械韧性的共混水凝胶是必需的。(C)2016爱思唯尔有限公司版权所有。
Hydrogels with mechanical toughness have attracted the attention of many researchers but still the mechanism remains poorly understood. In this study, we investigated molecularweight effects on the tensile properties for two kinds of blend hydrogels such as clay/sodium polyacrylate and clay/polyacrylamide, which were prepared by simple mixing, in order to clarify key factors of the mechanical toughness. The elastic modulus of the former hydrogel was much higher than that of the latter, while the latter extensibility was much higher than that of the former. It has been found that use of polymers with molecularweights higher than a few millions is necessary to obtain high extensibility for the blend hydrogels. It has been clarified from this study that all of the following three factors, (i) use of high molecularweight polymers, (ii) dispersion of clay particles and (iii) favorable interactions of clay and polymers are necessary to be fulfilled for fabrication of the blend hydrogels with mechanical toughness. (C) 2016 Elsevier Ltd. All rights reserved.