硝酸银及其产物银对六角相液晶流变性影响

用偏光显微镜测定了硝酸银及其产物银对NP－10／水六角相区的影响，用动态 （应力和频率扫描）和稳态（蠕变－恢复）方法研究了硝酸银的加入和银的生成对 该体系粘弹性的影响。无机前驱物硝酸银和银的生成能使六角相区略缩，动态流变 实验表明，无机物引入纯六角相液晶体系中会使其抗剪切的能力降低，对相区两侧 影响与振荡所采用的频率有关。生成的银原子会在胶束表面聚集，增加了胶束内部 不同EO链之间的交联，造成松弛时间变长，粘弹性指数降低，稳态实验所得到的结 果与动态实验一致，并将粘性和弹性定量化。用弹簧－粘壶模型和液晶的空间构型 及作用力解释了实验结果。

Effect of AgNo_3 and As-produced Ag on Rheological Properties of Hexagonal Liquid Crystal

The effect of AgNO_3 and as-produced Ag on phase zone and viscoelastic properties of hexagonal liquid crystal was investigated by using polarized light microscope and RS-75 rheostress. AgNO_3 and as-produced Ag can make hexagonal phase region shrink slightly. The results of stress sweep show that the critical stresses decrease for pure hexagonal phase and are related to the applied frequency for samples adjacent to hexagonal phase zone. The frequency sweep shows that the relaxation time becomes long and the viscoelastic exponents decrease as results of the aggregation and connection of as-produced Ag on EO chains from the surface of micelles. The results of creep are accordance with ones of oscillation experiment and quantify viscoelastic composition, which explained by the spring-dashpot model and spacial configuration and interaction in hexagonal phase.