长链烷基取代苯甲酸的合成及其胶凝行为  

Preparation and gelling properties of long-chain alkyl substituted benzoic acids

作　　者：薛敏[1] 李菊[1] 马耀辉[1] 董鹏[1] 白瑞虎 陈瑞洋 

机构地区：[1]西安文理学院化学与化学工程学院,陕西省表面工程与再制造重点实验室,陕西西安710065

出　　处：《陕西师范大学学报（自然科学版）》2015年第5期48-53,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(21403166);陕西省2014大学生创新创业训练计划(1674);陕西省分析化学重点学科经费

摘　　要：制备了三个具有不同个数长链烷基的取代苯甲酸类的小分子胶凝剂,考察了三种化合物在14种常见溶剂中的胶凝行为。结果表明,苯环上长链烷基的个数明显影响取代苯甲酸的胶凝行为;从胶凝溶剂的数量上可以看出,苯环上含一个和三个长链烷基的化合物A1和A3的胶凝能力明显强于含两个长链烷基的化合物A2。利用扫描电镜(SEM)考察了凝胶剂结构以及胶凝剂浓度对凝胶微观形貌的影响。X-射线衍射(XRD)研究表明,在A1/环己烷凝胶中,胶凝剂分子形成了六方和四方的混合堆积模式,提出了A1在环己烷凝胶中可能的分子堆积模型。Three substituted benzoic acids containing long chain alkyl with different number were prepared.Their gelation properties were evaluated in 14 solvents.It is revealed that the number of long-chain alkyl plays a crucial role in the gelation behaviors of the compounds.In terms of the number of solvents gelled by the tested three compounds,A1 with one long chain alkyl and A3 with three long chain alkyls were more versatile gelators than A2 with two long chain alkyls.Scanning electron microscope（SEM）was used to investigate the effect of structures and concentrations of gelators on morphologies of gels.X-ray diffraction（XRD）results revealed that the aggregate of A1 from its cyclohexane gel took a mixture of hexagonal and tetragonal packing modes,and a possible structure evolution process for the gel of A1/cyclohexane was proposed.

关 键 词：小分子胶凝剂 取代苯甲酸 长链烷基 自组装 

分 类 号：O648[理学—物理化学]