电喷法钛氧/聚乙烯吡咯烷酮/硬脂酸颗粒及其电流变性能

Electrorheological properties of titanium oxide/polyvinylpyrrolidone/stearic acid particles prepared by electrostatic spraying method

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236.7nm;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 precipita-tion （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.