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首页> 外文期刊>Polymer: The International Journal for the Science and Technology of Polymers >Tough, stretchable chemically cross-linked hydrogel using core-shell polymer microspheres as cross-linking junctions
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Tough, stretchable chemically cross-linked hydrogel using core-shell polymer microspheres as cross-linking junctions

机译：使用核 - 壳聚合物微球的坚韧，可伸展的化学交联水凝胶作为交联连接

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A series of chemically cross-linked microgel composite hydrogels (MCH gels) with excellent toughness and stretchability were prepared using core shell polymer microspheres as cross-linking junctions. In our strategy, MCH gels are obtained by connecting microspheres with polyacrylamide (PAAm) chains chemically grafted onto their surfaces, where an organic cross-linking agent is completely unnecessary. The mechanical behavior of the MCH gels was analyzed, and superresolution fluorescence microscopy and scanning electron microscopy were used to investigate their toughening mechanism. The results indicated that the homogeneous network structure resulting from the good compatibility between the core shell microspheres and matrix was an important reason for the excellent toughness of the MCH gels. In addition to interactions among H bonds in the grafted PAAm chains, reversible deformation of the core shell microspheres acting as cross-linking junctions, which arises from the flexibility of the microspheres, and the effect of cavitation between the microspheres and matrix could also effectively dissipate energy during deformation of the MCH gels. (C) 2017 Published by Elsevier Ltd.
机译：使用核壳聚合物微球作为交联结制备具有优异韧性和拉伸性的一系列化学交联的微凝胶复合水凝胶（MCH凝胶）。在我们的策略中，通过将微球与化学接枝到它们的表面上的聚丙烯酰胺（PAAM）链连接，其中有机交联剂完全不需要来获得MCH凝胶。分析了MCH凝胶的力学行为，使用超级化荧光显微镜和扫描电子显微镜来研究其增韧机制。结果表明，由核心壳微球和基质之间的良好相容性产生的均匀网络结构是MCH凝胶优异韧性的重要原因。除了在接枝Paam链中的H键之间的相互作用之外，核心壳体微球的可逆变形作用为交联结，它产生了微球的柔韧性，以及微球和基质之间的空化效果也可以有效地消散MCH凝胶变形过程中的能量。 （c）2017年由elestvier有限公司出版

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