羧基化碳纳米管增强的杂化超分子水凝胶及其物理性能

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。

Carboxyl-functionalized Carbon Nanotubes Reinforced Hybrid Supramolecular Hydrogel and Its Physical Properties

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 ob-vious enhancement of the mechanical properties of the hybrid hydrogels. In addition, the hybrid hydrogel still retained the basic cha-racteristics of the supramolecular hydrogel, especially the characteristics of shear thinning, temperature sensitivity and spontaneous recovery.