摘要
为了研究氧化石墨烯(GO)对海藻酸钠(SA)凝胶性能的影响,以Ca^(2+)与Fe^(3+)作为交联剂,在SA水凝胶自组装过程中加入GO水溶液,一步法得到了海藻酸钠/氧化石墨烯(SA/GO)复合水凝胶。通过扫描电子显微镜与X射线衍射表征了所得凝胶的结构与微观形貌,测试了不同凝胶样品的平衡溶胀性能和力学性能。研究结果表明,Fe^(3+)交联得到的凝胶结构相比Ca^(2+)交联得到的凝胶更加紧凑,平衡溶胀性能降低较多;随着GO的加入,复合水凝胶的力学性能提升,平衡溶胀性能降低,这表明SA/GO复合水凝胶的性能可以通过选择合适的交联剂与GO用量进行调控。
To study the effect of graphene oxide(GO)on the property of sodium alginate(SA)hydrogel,the sodium alginate/graphene oxide(SA/GO)composite hydrogel was prepared through the addition of GO in theself-assembly process of SA hydrogel using Ca2+or Fe3+as crosslinking agents. The morphology and structure ofthe as-prepared hydrogels were characterized by scanning electron microscopy and X-ray diffraction,and theirequilibrium swelling degree and mechanical strength were also measured. The experimental results show that theequilibrium swelling degree of the hydrogel crosslinked by Fe3+is significantly decreased with more compactedmicrostructure,compared with that of the hydrogel crosslinked by Ca2+. The mechanical strength of the compositehydrogel improves and the equilibrium swelling degree decreases with the increase of GO,indicating that the property of SA/GO composite hydrogel can be controlled with crosslinking agent and amount of GO.
作者
李亮
喻航达
邱唯楚
申小松
喻湘华
LI Liang;YU Hangda;QIU Weichu;SHEN Xiaosong;YU Xianghua(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《武汉工程大学学报》
CAS
2018年第6期641-644,共4页
Journal of Wuhan Institute of Technology
基金
武汉工程大学第九届研究生教育创新基金(CX2017001)
2017年地方高校国家级大学生创新创业训练计划项目(201710490004)
关键词
海藻酸钠
氧化石墨烯
复合水凝胶
sodium alginate
graphene oxide
composite hydrogel
