电喷法钛氧/聚乙烯吡咯烷酮/硬脂酸颗粒及其电流变性能∗

摘要

采用电喷法制备钛氧/聚乙烯吡咯烷酮/硬脂酸(钛氧/PVP/SA)微纳米颗粒.SEM、粒径分析表明钛氧/PVP/SA颗粒为规则球状，平均尺寸为236．7 nm；FT-IR 表明 PVP、SA 成功引入钛氧颗粒；XRD 表明钛氧/PVP/SA颗粒为无定形态.分别以电喷法钛氧/PVP/SA、水解沉淀法钛氧/PVP/SA 颗粒为分散相，制备质量分数为43％的电流变液.电流变性能测试结果表明，电喷法钛氧/PVP/SA 电流变液比水解沉淀法钛氧/PVP/SA电流变液具有更高的剪切屈服强度及剪切稳定性.%Polyvinylpyrrolidone (PVP)and stearic acid (SA)modified titanium oxide (TiOx )particles were synthesized by electrostatic spraying(ES)method.SEM and particle size analysis results showed that TiOx/PVP/ SA particles were regular sphere whose average size was 236.7 nm.FT-IR results showed that PVP and SA were introduced to TiOx successfully.XRD results showed that TiOx/PVP/SA particles were amorphous state. Two kind of TiOx/PVP/SA particles which were synthesized by electrostatic spraying and hydrolysis precipitation (HP)methods respectively were used to prepared electrorheological(ER)fluids in the mass fraction of 43%.The electrorheological properties were tested and the results showed that ES-TiOx/PVP/SA particles based ER fluid presents higher shear yield intensity and shear stability in comparison with HP-TiOx/PVP/SA based ER fluid.