羧基化碳纳米管增强的杂化超分子水凝胶及其物理性能

摘要

通过物理交联方法制备了含羧基化碳纳米管(CNTs-COOH)的杂化超分子水凝胶,采用透射电子显微镜(TEM)观察样品的微观形貌,探究了碳纳米管的引入对凝胶的溶胀性、凝胶-溶胶转变温度和力学性能的影响.结果显示,与初始纯凝胶相比,质量分数2.5％的碳纳米管的引入不但没有改变凝胶的初始形貌和微观结构,反而提高了其凝胶-溶胶转变温度,且凝胶的力学性能也明显得到增强.进一步研究表明,制备的杂化水凝胶依然具有超分子水凝胶的基本特性,特别是剪切变稀、温度响应性和自恢复特性.%Hybrid supramolecular hydrogels embedded with carboxyl-functionalized carbon nanotubes (CNTs-COOH) were obtained via physical cross-linking.Transmission electron microscopy (TEM) were used to observe the microstructure of the sample.The effect of the introduction of the CNTs-COOH on the swelling behavior,gel-sol transition temperature and mechanical property of the gel were detected.The results revealed that compared with the initial gel,the inclusion of the carbon nanotubes(2.5wt.％)had no impacts on the morphology and microstructure of the gel,but caused an increase of its gel-sol transition temperature,also an obvious enhancement of the mechanical properties of the hybrid hydrogels.In addition,the hybrid hydrogel still retained the basic characteristics of the supramolecular hydrogel,especially the characteristics of shear thinning,temperature sensitivity and spontaneous recovery.