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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (4): 418-423. 上一篇    下一篇

研究论文

水溶性β-环糊精聚合物的交联度对3-羟基-2-萘甲酸荧光性质及电流变性能的影响

高子伟, 赵晓鹏   

  1. 西北工业大学电流变技术研究所, 西安, 710072
  • 投稿日期:2003-04-14 修回日期:2003-10-28 发布日期:2014-01-26
  • 通讯作者: 赵晓鹏,E-mail:xpzhao@nwpu.edu.cn E-mail:xpzhao@nwpu.edu.cn
  • 基金资助:
    国家自然科学基金(Nos.59832090,50272054)和国家杰出青年科学基金(No.50025207)资助项目.

Influence of Crosslinking Degree of Soluble β-Cyclodextrin Polymer on the Fluorescence of 3-Hydroxy-2-naphthoic Acid and Its ER Properties

GAO Zi-Wei, ZHAO Xiao-Peng   

  1. Institute of Electrorheological Technology, Northwestern Polytechnical University, Xi'an 710072
  • Received:2003-04-14 Revised:2003-10-28 Published:2014-01-26

PDF

272

被引次数

10

用改进的Renard方法控制合成了6种不同交联度的水溶性β-环糊精聚合物.以3-羟基-2-萘甲酸为荧光探针,考察了聚合物交联度对形成超分子配合物的稳定性及荧光性质的影响,发现生成常数和相对荧光强度均随交联度的增长呈上升趋势,并发现其相对荧光强度的增量与对应的交联度存在线性关系.用β-环糊精聚合物及其与3-羟基-2-萘甲酸构筑的超分子配合物分别与二甲基硅油配制了电流变液,流变学性能测试发现这些聚合物电流变液均有很好的电流变活性,其中,单纯聚合物电流变液的屈服应力随交联度的增加呈上升趋势,而超分子配合物电流变液则表现出更高的电流变活性,但当交联度太大时,其屈服应力甚至低于对应的聚合物,并随交联度的增加呈先增加后降低的趋势;介电性能测试发现,交联度对电流变液介电常数和体积电导率的影响均出现了与电流变液效应相类似的趋势.

关键词: 电流变液, β-环糊精聚合物, 3-羟基-2-萘甲酸, 交联度

Six soluble β cyclodextrin polymers were prepared by the modified method of Renard. Using 3-hydroxy-2-naphthoic acid as a fluorescence probe, the relationship of the crosslinking degree (CLD) of the polymer with the stability of supramolecular complex and the fluorescence properties was investigated, respectively. The results showed that the formation constant increased with the enhancement of CLD as well as the relative fluorescence intensity. And also, a straight-line relationship was observed between the increment of the relative fluorescence intensity and CLD, indicating that CLD had strong influence on the fluorescence properties. The polymers and their complex particles in silicone oil were investigated under DC electric fields, respectively. It was found that these ER fluids exhibited good ER effects. The yield stress increased with the increase of CLD for the pure β-cyclodextrin polymers. The supramolecular complex ER fluids displayed a higher ER effect than the polymer, but the yield stress increased firstly and then decreased with the increase of CLD. This was well confirmed by the measurement of the dielectric properties of these ER fluids.

Key words: electrorheological fluid, β-cyclodextrin polymer, 32hydroxy-2-naphthoic acid, crosslinking degree