含密胺基团的偶氮苯类凝胶因子的合成及其凝胶性能  

Synthesis and Gelation Properties of Azobenzene Gelators with Melamine Moieties

作　　者：李文露[1,2] 杨新国[1,2] 张立震 李丝雨[1,2] 钱杨 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]湖南大学湖南省喷射沉积技术及应用重点实验室,湖南长沙410082

出　　处：《精细化工》2018年第1期29-35,42,共8页Fine Chemicals

基　　金：国家自然科学基金(50573019,51273061);湖南省自然科学基金(2016JJ2027)~~

摘　　要：以对硝基苯酚和三聚氯氰为原料,合成了含密胺基团的偶氮苯类凝胶因子AZO-1和AZO-2。考察了AZO-1和AZO-2的临界凝胶温度（Tc）和临界凝胶浓度（CGC）,并利用SEM和紫外吸收光谱对凝胶的微观结构以及光响应行为进行了测定。结果表明,AZO-2较AZO-1具有更高的临界凝胶温度和更低的临界凝胶浓度,表现出较好的凝胶性能。AZO-1和AZO-2的凝胶纤维聚集结构不同,AZO-1纤维取向性较好,排列紧密;AZO-2纤维相互缠绕成三维网络结构,以簇状堆积为主。AZO-1和AZO-2经UV光照后仍可以稳定凝胶,但纤维形态结构发生了一定程度的变化。凝胶因子在不同状态下的红外光谱表明,分子间作用力在凝胶形成过程中起重要作用。Azobenzene gelators AZO-1 and AZO-2 with melamine moieties were designed and synthesized with p-nitrophenol and cyanurie chloride as raw materials. Gel-sol transition temperature （Tc） and critical gel concentration （CGC） of AZO-1 and AZO-2 were tested. The morphologies of xerogels and photoresponsive behavior were studied by SEM and UV absorption spectra. The results illustrated that AZO-2 exhibited higher Tc and lower CGC than AZO-1, indicating that AZO-2 had better gelation properties. Besides, the gel＇ s fiber aggregation structures of AZO-1 and AZO-2 were different. The fibers of AZO-1 gel showed good orientation and closely packed,while that of AZO-2 gel intertwined to form a three-dimensional network structure, and mainly showed stacks of clusters. AZO-1 and AZO-2 could also form stable gel after UV light irradiation. But the microstructure of fibers changed to a certain extent. The IR spectra of gelators in different states indicated that the intermolecular forces played an important role in gel formation.

关 键 词：偶氮苯 有机凝胶 H-聚集 疏水作用 光响应行为 凝胶性能 功能材料 

分 类 号：O62[理学—有机化学] O641.3[理学—化学]