Enhanced Electrorheological Properties of Elastomers Containing TiO2/Urea Core鈥揝hell Particles

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• 作者：Chenguang Niu ; Xufeng Dong ; Min Qi
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 11, 2015
• 年：2015
• 卷：7
• 期：44
• 页码：24855-24863
• 全文大小：636K
• ISSN：1944-8252

文摘

Polar molecule-coated core鈥搒hell particles have been used to prepare electrorheological (ER) fluids with high performance. Inspired by those studies, TiO₂/urea core鈥搒hell structured particles were fabricated and used to prepare novel ER elastomers, whose properties were compared with the ER elastomers with bare TiO₂ particles. Particles characterization results illustrate the TiO₂/urea particles present little change in size, morphology and crystal structure with respect to the bare amorphous TiO₂ particles, while clear core鈥搒hell structure is observed. Compared with the bare TiO₂ particles filled elastomer, the TiO₂/urea particles filled elastomer presents higher dielectric constant, indicating enhanced polarization. The viscoelastic properties of the two elastomers under different strain amplitude, frequency and electric field were tested. The results indicate that the TiO₂/urea particles filled elastomer shows higher storage modulus G鈥?and higher relative ER effect within the low field strength region from 0 to 2 kV/mm. Coating polar molecules is an effective method to improve the ER performance for ER elastomers.