基于均苯三甲酸与4-羟基吡啶的超分子水凝胶  

Supramolecular Hydrogels Based on 1,3,5-Benzenetricarboxylic Acid and 4-Hydroxypyridine

作　　者：王可答[1] 刘利军[1] 唐黎明[2] 

机构地区：[1]绥化学院化学与制药工程系,绥化152061 [2]清华大学化工系教育部先进材料重点实验室,北京100084

出　　处：《化学学报》2009年第14期1659-1662,共4页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.20574041;20874055)资助项目

摘　　要：以均苯三甲酸和对羟基吡啶为原料,采用简便方法合成了一种新的凝胶因子,并采用1HNMR、IR和元素分析确认其结构.红外光谱中2849和1894cm-1处出峰证明羧基与吡啶基间形成了氢键.在凝胶化过程中,凝胶因子可自组装形成纤维状网络结构.随着凝胶因子浓度的增加,纤维搭接逐渐致密,凝胶网络密度逐渐增大,可冻结水含量逐渐增加.因此,通过改变凝胶因子浓度可有效控制凝胶的结构及性能.该凝胶因子在较低浓度下形成的超分子水凝胶在100℃下也能够稳定存在.A new gelator was synthesized from 1,3,5-benzenetricarboxylic acid （BTA） and 4-hydroxypyridine （PHP） by a simple procedure and structurally confirmed by ^1H NMR, IR and elemental analysis. The characteristic peaks of 2489 and 1894 cm^-1 in the IR spectrum indicated the formation of hydrogen bond between the carboxylic acid and pyridyl groups. The gelator molecules assembled into aggregated fibers during the gelating process. On increasing the gelator concentration, the fiber size, fiber network density and freezing water content increased accordingly. Therefore the gel structures could be controlled by changing the gelator concentration. The supramolecular hydrogels formed at a gelator concentration higher than 2.3 wt% kept stable even under 100℃.

关 键 词：超分子水凝胶 凝胶因子 氢键 结构 

分 类 号：O626.32[理学—有机化学]