【作者】 刘洋； 杨玉燕； 宋沙沙； 赵增典；

【Author】 Yang Liu;Yuyang Yang;Shasha Song;Zengdian Zhao;School of chemical engineering,Shandong University of Technology;

【机构】 山东理工大学化学工程学院；

【摘要】 凝胶作为一种重要的软物质材料,在日常生活和工业生产中应用广泛。在凝胶的合成或使用过程中发生损坏时,其结构的完整性和机械强度会被破坏,功能丧失,极大的缩短了凝胶的使用寿命。受损凝胶内部的微观裂痕难于检测和修复,在使用过程中具有安全隐患[1]。具有自愈合性能的凝胶材料受到外界损伤后具有自修复能力和再生功能,能够延长材料的使用寿命,提高材料使用的安全性,是当前凝胶研究的前沿和热点[2]。本文以线性氨基封端的聚乙二醇(PEG-NH2)与三联吡啶衍生物(PPCT)为原料合成了自愈合水凝胶。利用扫描电子显微镜(SEM)观察了凝胶的微观结构,结果表明凝胶是由尺寸为200 nm的三维网络状纤维组成。凝胶的屈服应力值能够达到50 Pa,具有较高的粘弹性,表现出优异的机械性能。将凝胶放置于有机染料的溶液中,能够快速的吸附染料,达到净化废水的目的。更多还原

【Abstract】 As one kind of the most significant soft materials,gels have been widely applied in our daily life and industry production.During thepreparation or utilization process,the gels would be damaged,besides,its structural integrity and mechanical strength would be destroyed,which wouldloss of the function,shorten the service life of the gel.In addition,the micro-cracks in the gel were difficult to detect and repair,leading to the security risks.Gels with self-healing or self-repairing properties can restore their functionalities and structures after damage,which can extend the service life and improve the used safety of the materials,being the cutting-edge topics in gel materials.In this article,self-healing hydrogels was obtained by mixing the amine-terminated poly(ethylene glycol) oligomers and terpyridine derivative in water.SEM observations demonstrate that the gels are formed by fibrils with the diameter of 200 nm.The rheological measurements show a strong mechanical strength with an elastic modulus exceeding 4300 Pa and a yield stress exceeding 50 Pa.Moreover,due to the efficient adsorption of the toxic dye molecules,this hydrogel system can be used as an environmentally friendly water-purifying agent.We hope our results will provide useful information in applications in biological and materials science areas.更多还原