摘要
利用壳聚糖与氧化石墨烯之间的静电作用力,制备出了具有p H响应的壳聚糖/氧化石墨烯复合水凝胶体系.运用扫描电镜、X射线衍射、紫外可见光谱和红外光谱对复合水凝胶的微观内部结构与形成机理进行了分析探索.结果表明,壳聚糖与氧化石墨烯的最佳用量比为1:6时,能形成十分稳定的凝胶.此外,这种凝胶表现出明显的p H响应特性.当体系p H在4.98时,复合水凝胶具有最高的粘度1060Pa·s,远高于同浓度的单独壳聚糖与氧化石墨烯溶液,但p H改变后,凝胶粘度均会变小.这种复合凝胶体系不仅制备简便,而且具有p H响应性能,可望扩展石墨烯凝胶材料在生物领域中的应用范围.
The chitosan/graphene oxide composite hydrogel was prepared by the electrostatic interaction between chitosan and graphene oxide. Scanning electron microscopy（SEM） ,UV-vis spectroscopy,fourier transform infrared spectmscopy（FTIR） ,and X-ray diffraction（XRD）were used to characterize the microstructures and formation mechanism of the composite hydrogels. The results showed that the optimum ratio of chitosan to graphene was 1：6, which could form a stable hydrogel. And the pH changes of systems would lead to the changes of get viscosity, exhibiting a significant pH-responsive property. When the system pH was 4. 98 ,the maximum viscosity of the composite hydrogel could reach 1060 Pa · s,which was much higher than that of the same concentration of chitosan and graphene oxide solutions. This composite gel system is not only simple to prepare, but also has pH-responsive properties. It is expected to extend the application range of graphene related materials in the biological field.
出处
《西南民族大学学报（自然科学版）》
CAS
2017年第2期129-136,共8页
Journal of Southwest Minzu University(Natural Science Edition)
基金
四川省教育厅科研项目(15ZB0485)
中央高校基本科研业务费专项项目(2016NZYQN16)
