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材料导报  2021, Vol. 35 Issue (8): 8201-8206    https://doi.org/10.11896/cldb.20010065
  高分子与聚合物基复合材料 |
双组分超分子凝胶材料的形成机理及流变性能
薛敏, 张祥, 刘璐, 常文浩, 李蓓蓓
西安文理学院化学工程学院,西安 710065
The Forming Mechanism and Rheological Properties of Two-component Supramolecular Gel Materials
XUE Min, ZHANG Xiang, LIU Lu, CHANG Wenhao, LI Beibei
School of Chemical Engineering, Xi'an University, Xi'an 710065, China
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摘要 本工作合成了三种取代芳香羧酸化合物——DCn(n=14、16、 18),测试了DCn与乙二胺(EDA)在溶剂中形成双组分超分子凝胶的能力。测试结果表明,DCn+EDA(1∶1,物质的量比)能将一些极性较大的溶剂(如H2O、DMF、DMSO等)胶凝。利用扫描电镜(SEM)观察了凝胶的微观形貌;红外光谱研究表明,双组分凝胶的形成是由于DCn与EDA反应生成的羧酸盐将溶剂胶凝;X射线衍射分析(XRD)研究表明,DC16+EDA(1∶1)在水中自组装形成的凝胶具有六方堆积结构。本工作还提出了双组分凝胶可能的多级自组装过程。流变学研究表明,DC18+EDA/DMF双组分凝胶对外界应力具有良好的耐受性,并表现出优异的剪切触变性。
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薛敏
张祥
刘璐
常文浩
李蓓蓓
关键词:  双组分凝胶  超分子材料  取代芳香羧酸  自组装  剪切触变性    
Abstract: Three aromatic carboxylic acids, DCn(n=14, 16,18), were synthesized, and their gelation behaviors with ethanediamine (EDA) were tes-ted in different solvents. The gelation tests revealed that DCn+EDA(1∶1) could form two-component supramolecular gels in some solvents with high polarity(H2O,DMF,DMSO). The microstructures of two-component gels were obtained via SEM, and FT-IR spectroscopy studies showed that the carboxylate formed by DCn and EDA gelated the solvents. X-ray diffraction (XRD) analysis revealed that in two-component gels, DC16+EDA(1∶1) took a hexagonal packing mode. On the basis of the results of IR and XRD analysis, a possible multi-stage self-assembly process for the two-component gels was proposed. The rheological studies showed that DC18+EDA/DMF gel had a good tolerance to external forces and possessed a reversible thixotropic property.
Key words:  two-component gels    supramolecular materials    substituted aromatic carboxylic acids    self-assembly    thixotropic property
               出版日期:  2021-04-25      发布日期:  2021-05-10
ZTFLH:  O648  
基金资助: 国家自然科学基金青年基金(21403166);陕西省自然科学基金(2020JQ-890);西安市科技计划创新基金(2017CGWL01)及大学生创新创业训练计划项目(S201911080057)
通讯作者:  xuemin@xawl.edu.cn   
作者简介:  薛敏,西安文理学院化学工程学院,副教授。2009年6月毕业于陕西师范大学,获得材料学博士学位。同年加入西安文理学院化学工程学院工作至今,主要从事分子凝胶、金属凝胶、功能配合物材料的创新制备及其性能与应用研究。
引用本文:    
薛敏, 张祥, 刘璐, 常文浩, 李蓓蓓. 双组分超分子凝胶材料的形成机理及流变性能[J]. 材料导报, 2021, 35(8): 8201-8206.
XUE Min, ZHANG Xiang, LIU Lu, CHANG Wenhao, LI Beibei. The Forming Mechanism and Rheological Properties of Two-component Supramolecular Gel Materials. Materials Reports, 2021, 35(8): 8201-8206.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20010065  或          http://www.mater-rep.com/CN/Y2021/V35/I8/8201
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