棒状草酸氧钛钙巨电流变颗粒制备及其电流变性能研究

Study on preparation of rod-like calcium titanyl oxalate and properties of electrorheological fluids

为研究电流变液的剪切强度,首先采用化学共沉淀法合成棒状草酸氧钛酸钙(CTO)纳米颗粒,通过改变聚乙二醇的相对分子质量、用量以及水和乙醇的配比调节颗粒形貌;然后将最优条件下制备的棒状结构CTO纳米颗粒均匀地分散在硅油中,发现制得的电流变液表现出优异的电流变特性和抗沉降性,屈服应力可达180 k Pa.

To study the shear strength of electrorheological fluid, we synthesize the calcium titanyl oxalate （CTO） nanoparticles by using chemical co-precipitation method. The morphology of the particles is controlled through changing the molecular weight and the amount of PEG, the ratio of ethanol and water. Then, the rod-like CTO nanoparticles prepared with the optimal conditions are dispersed in the silicone oil, with which the electrorheological fluid exhibits excellent electrorheological and anti-settling properties. The yield stress can reach as high as 180 kPa.