沸石电流变液材料的研究

系统地研究了沸石的由离子类型、数目、骨架的孔道大小和结构特性对沸石电流变液性能的影响. 证实了阳离子在电场中的迁移所引起的晶粒极化是Y，A和M等沸石电流变特性的基础，指出了较大的孔径和具有足够多易迁移的阳离子是该类沸石具有较好电流变性的的前提．根据NaZSM－5沸石在高电场中与其它沸石表现不同，具有屈服应力大而漏电流小的特点，提出了沸石晶粒极化还可能存在的另一种新的晶格变形机理．

Studies on the Zeolite Electrorheological Fluids

The behavior of zeolite-based electrorheological fluids is influenced by the type and the number of cations, the pore-opening size and other structure properties of zeolites. It has been confirmed that the crystal polarization resulted from the migration of cations under high electric field is the foundation of the electrorheological effects of zeolites Y, M and A. For these types of zeolites, higher cation content and larger pore opening size are more favorable for obtaining good electrorheological properties. Differed from all the other zeolites, NaZSM-5-based electrorheological fluid displays extraordinary strong static yield stress and very small leak current at high electric field. A new mechanism for the pentasil-type zeolite crystal polarization under high electric field, i.e., the framework deformation mechanism, has been suggested.