用于含芳烃废水处理的室温凝胶剂及其机理研究  

Room-Temperature Gelator for Aromatics Wastewater Treatment and Mechanism Study

作　　者：宋健[1] 阮凯 赵君彦 张宝浩 张宝[1] Song Jian;Ruan Kai;Zhao Junyan;Zhang Baohao;Zhang Bao(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Tianjin Jinnan District Environmental Monitoring Center,Tianjin 300350,China)

机构地区：[1]天津大学化工学院,天津300350 [2]天津市津南区环境监测中心,天津300350

出　　处：《天津大学学报（自然科学与工程技术版）》2021年第3期295-302,共8页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(21676185)。

摘　　要：随着工业废水泄漏造成的水污染事件频繁发生,针对有毒有机溶剂的相选择性凝胶化的研究已经成为热点.然而目前已报道的相选择凝胶剂大多都需要使用毒性大的助溶剂来实现相选择性凝胶.通过对2,4-(3,4-二氯苯亚甲基)-D-葡萄糖酸酰十六胺的自组装条件进行调控,制备了一种粉末型相选择凝胶剂,该凝胶剂能在室温下凝胶氯苯、甲苯等芳烃溶剂.通过红外光谱、X射线衍射实验、扫描电子显微镜及理论计算证明了分子间的自组装驱动力为氢键、π-π堆积和范德华作用力.对自组装条件进行调控,可以降低凝胶剂的结晶性,减小组装体之间的范德华作用力.室温下,粉末纤维很容易在溶剂中快速的分散和组装,从而具有出色的室温凝胶能力.对该凝胶剂进行了芳烃的回收实验,结果表明该凝胶剂可从芳烃/水两相混合物中选择性的凝胶芳烃,形成的芳烃凝胶可回收利用.With the frequent occurrence of water pollution incidents caused by industrial wastewater leakage,research on the phase-selective gelation of toxic organic solvent has become a research hotspot.However,most of the currently reported phase-selective gelators require the use of highly toxic cosolvents to achieve phase-selective gelation.By regulating the self-assembly conditions of 2,4-(3,4-dichlorobenzylidene)-D-glucanoylhexadecylamine,a phase-selective gelator was prepared.The gelator can directly gel aromatics,such as chlorobenzene and toluene,at room temperature.In addition,infrared spectroscopy,X-ray diffraction experiments,scanning electron microscopy,and theoretical calculations revealed that the driving forces of intermolecular self-assembly are hydrogen bonding,π-πstacking,and van der Waals forces.Regulating the self-assembly conditions can reduce the crystallization of the gelator and the van der Waals forces between the assemblies.Powder fibers are easily and rapidly dispersed and assembled in solvent at room temperature,and excellent room-temperature gel properties are eventually obtained.Aromatics recovery experiment of the gelator was conducted.Results showed that the gelator could selectively gel aromatics from water/oil two-phase mixture and that the formed gel could be recycled.

关 键 词：相选择有机凝胶剂 室温凝胶 废水处理 

分 类 号：O641.3[理学—物理化学]