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首页> 外文期刊>Journal of Applied Polymer Science >Network Structure and Mechanical Properties of Hydrophobic Association Hydrogels: Surfactant Effect I
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Network Structure and Mechanical Properties of Hydrophobic Association Hydrogels: Surfactant Effect I

机译：疏水缔合水凝胶的网络结构和力学性能：表面活性剂作用I

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Three series hydrophobic association hydrogels (HA-gels) with different concentration of sodium dodecyl sulfate (SDS) were prepared by free radical micellar copolymerization. The backbone of HA-gels was based on the copolymer of acrylamide and a little octylphenol polyoxyethylene ether acrylate with 10 ethoxyl units (OP10 similar to AC). Their mechanical properties were determined by tension tests. It was found that the properties of all three series HA-gels presented a very similar variation tendency with increasing R, the molar ratio of SDS to OP10 similar to AC. In the medium region of R (around 1.23), higher effective crosslinked density and proper match between shorter and longer chains were achieved, so that the HA-gels exhibited better mechanical strengths. In lower R region, it is prone to form the unstable aggregation of OP10 similar to AC with little SDS, while in higher R region some of co-micelles could not act as crosslinkers. Both would reduce the effective crosslinked density and the mechanical strength of HA-gel. In the condition of fixed R, the change of OP10 similar to AC content would remodel the topological structure of network. The HA-gels with better properties could be obtained as the OP10 similar to AC content was varied from 1 to 2% at the proper R. (C) 2014 Wiley Periodicals, Inc.
机译：通过自由基胶束共聚反应制备了不同浓度的十二烷基硫酸钠（SDS）三系列疏水缔合水凝胶（HA-gels）。 HA凝胶的主链基于丙烯酰胺和少量带有10个乙氧基单元（OP10与AC相似）的辛基酚聚氧乙烯醚丙烯酸酯的共聚物。通过拉伸试验确定它们的机械性能。已经发现，随着R的增加，所有三个系列HA-凝胶的性质呈现出非常相似的变化趋势，SDS与OP10的摩尔比与AC相似。在R的中等区域（约1.23），获得了更高的有效交联密度以及较短和较长链之间的适当匹配，因此HA凝胶表现出更好的机械强度。在较低的R区，很容易形成类似于AC的OP10不稳定聚集体，而SDS很少，而在较高的R区，一些胶束不能充当交联剂。两者都会降低HA凝胶的有效交联密度和机械强度。在固定R的条件下，OP10的变化类似于AC含量会重塑网络的拓扑结构。通过在适当的R下将类似于AC含量的OP10从1％更改为2％，可以获得具有更好性能的HA凝胶。（C）2014 Wiley Periodicals，Inc.

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