中文摘要：

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.

英文摘要：

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