β-环糊精包结物电流变颗粒的制备和性能　  

MOLECULAR SELF-ASSEMBLY SYNTHESIS AND ELECTRORHEOLOGICAL PROPERTIES OF INCLUSIVE COMPLEX FROM β-CYCLODEXTRIN

作　　者：高子伟[1] 赵晓鹏[1] 梁晓强[2] 司刚[2] 

机构地区：[1]西北工业大学,陕西师范大学西安市710072 [2]陕西师范大学

出　　处：《材料研究学报》2002年第2期126-130,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金重点项目59832090;国家杰出青年基金50025207项目

摘　　要：采用分子自组装的方法制备了β－环糊精聚合物包结物颗粒．用荧光分析和红外光谱表征了包结物的结构，发现客体１－（２－吡啶偶氮）－２－萘酚中极性较小的萘环进入了环糊精内腔.用β－环糊精聚合物及其自组装包结物颗粒与二甲基硅油配制了两种电流变液。对其流变学性能的研究发现、包结物电流变液在直流电场 ５ ｋＶ／ｍｍ中的静态屈眼应力可达 ６．２ ｋＰａ，比主体提高近 ３倍：介电测试的结果表明．包结物的介电常数为 ５．３５，电导率为 ２．９７×１０－９Ｓ／ｍ，均高于主体、其中电导率比主体提高了 １０倍多：抗沉降性能测试结果为：自组装包结物存放 ３００ ｈ，其沉降率为 ８９％，而主体仅为 ７６％．包结物电流变液性能的提高可能与主－客体间存在的超分子作用、客体的属性等有关．Based on molecular self-assembly, a inclusive complex (β-CDP-PAN) ofβ-cyclodextrin cross-linking polymer (β-CDP) was prepared. The structure of the inclusive complex was characterized by using fluorescence spectrophotometer and IR. The results demonstrated that the naphthalene ring of 1-(2-yridlazo)-2-aphthol (PAN) was included in the glycopyranose unit ofβ-CDP. A new method of synthesis of electrorheological materials was proposed in this paper and two new electrorheological fluids (ER) were prepared by dispersion ofβ-CDP and its inclusive complex in silicone oil, respectively. It was obviously observed that the inclusive complex has higher dielectric properties-the dielectric constant ofβ-CDP-PAN is 5.35 and that of conductivity is 2.97x109 Sm-1, which is over more 10 times than that ofβ-CDP-and much stronger ER effect thanβ-CDP. Under the electric fields of 5 kV/mm (DC), the static shear stress ofβ-CDP-PAN is 6.2 kPa and 2-3 times higher than that of β-CDP. This may be due to the supermolecular action between β－CDP and PAN and possibly relation to the properties of the guest.

关 键 词：β-环糊精包结构 电流变颗粒 制备 性能 电流变液 自组装 Β-环糊精交联聚合物 

分 类 号：TB34[一般工业技术—材料科学与工程] O373[理学—流体力学]