阳离子表面活性剂与偶氮苯构筑的光响应流体的流变行为  

Rheological properties of photo-responsive system composed of cationic surfactant and azobenzene

作　　者：郭严[1] 陈肖肖[1] 刘敏 韩传红[1] 张启瑞[1] 周士岩 魏西莲[1] GUO Yan CHEN XiaoXiao LIU Min HAN ChuanHong ZHANG QiRui ZHOU ShiYan WEI XiLian(College of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, Chin)

机构地区：[1]聊城大学化学化工学院山东省化学储能与新型电池技术重点实验室,聊城252059

出　　处：《科学通报》2017年第9期951-959,共9页Chinese Science Bulletin

基　　金：国家自然科学基金(21473084;21473085;21073081);聊城大学重点科研基金(318011402);聊城大学重点教学研究课题(31161518)和聊城大学实验技术研究项目(LDSY2014008)资助

摘　　要：通过流变学的方法研究了十六烷基三甲基水杨酸铵(C_(16)TASal)与偶氮苯(AZB)构筑的光响应流体的流变特性.结果表明,在一般条件下,由于拟网络结构的形成,C_(16)TASal体系形成高黏弹性的胶束溶液.当体系中加入偶氮苯后,溶液的黏度大大降低.由于偶氮苯的顺-反光异构化性能,在紫外-可见光照射下,C_(16)TASal/AZB混合体系的黏弹性能被可逆地调控.与十六烷基三甲基溴化铵(CTAB)/NaSal/AZB混合体系的对比实验发现,后者在紫外光照射下所有溶液黏度均降低,当用可见光照射时,体系的黏度未发现可逆性能.用紫外、红外、核磁共振光谱以及透射电子显微镜等技术辅助研究混合体系的光敏特性及微观结构.A ＂smart＂ fluid has been considered as an important part of softer matters, which undergoes a change in some macroscopic property in response to an external stimulus, such as light, pH, temperature and so on. Among these stimulus, light could serve as a trigger which possesses a series of advantages compared with other kinds of stimulus. Firstly, light is more temperate and non-invasive, since it need not any additives. Secondly, light signal is more available. Thirdly, light could aim at a special functional group, which is valuable on medical applications. This smart fluid is usually named as photorheological （PR） fluids, which show changes in their rheological and flow properties under irradiation of light at a given wavelength. Therefore, PR fluids has been widely employed in research and development for photo-responsive micelles. But it is difficult to synthesize some new complex photosensitive molecules, so it is worth to develop simple classes of PR fluid that require no special synthesis and make full use of inexpensive chemicals to combination. In this research, we investigated a class of such photo-responsive systems obtained by mixing traditional cationic surfactants, cetyltrimethylammonium salicylate （C16TASal） or cetyltrimethylammonium bromide （CTAB） and a common photosensitive compound azobenzene （AZB） and their photosensitive properties by employing the rheological measurements, freeze-etching electron microscopy （FF-TEM）, Fourier transform infrared spectrometer （IR） and nuclear magnetic resonance （1H NMR）. The rheological properties of the C16TASal/AZB mixed system indicate that the rheological behavior is corresponding with the Maxwell model. In the solution of C16TASal, salicylate ions didn＇t penetrate into the palisade layer but adsorbed on the interface of the micelles due to the bridges between carboxyl groups of salicylate anions and water molecules by hydrogen bonding. The rod-micelles connected to each other through these hydrogen bonds and then formed a

关 键 词：流变性能 十六烷基三甲基水杨酸铵 十六烷基三甲基溴化铵 偶氮苯 光响应性 

分 类 号：O647.2[理学—物理化学]