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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

包覆型高岭土/二氧化钛纳米复合颗粒的电流变效应

王宝祥; 左朝阳; 赵晓鹏   

  1. 西北工业大学电流变技术研究所 西安 710072
  • 收稿日期:2003-05-08 修回日期:2003-06-09 出版日期:2004-05-20 网络出版日期:2004-05-20

Electrorheological Effect of Titania-Coated Kaolinite Nanocomposite Particles

WANG Bao-Xiang; ZUO Zhao-Yang; ZHAO Xiao-Peng   

  1. Institute of Electrorheological Technology; Northwestern Polytechnical University Xi an 710072; China
  • Received:2003-05-08 Revised:2003-06-09 Published:2004-05-20 Online:2004-05-20

PDF (PC)

958

被引次数

47

摘要： 采用溶胶-凝胶法制备了一种新型高岭土/二氧化钛纳米复合电流变液材料.XRD、FT-IR、SEM分析表明TiO2以纳米晶的形态包覆于高岭土表面.电流变性能测试表明,不同的TiO2质量比的复合颗粒电流变液效应不同,且都比纯高岭土电流变有显著提高.同时当复合颗粒中TiO2质量百分比在34％,颗粒硅油体积分数为25％,直流电场为3kV/mm时,高岭土/二氧化钛纳米复合材料电流变液的静屈服应力达3.4kPa,是纯高岭土电流变液的5倍.

关键词: 高岭土, 二氧化钛, 电流变液, 溶胶-凝胶法

Abstract: Kaolinite/TiO2 nanocomposite particles were prepared by sol-gel technique. The analysis of XRD,FT-IR and SEM shows that the surface of kaolinite is coated by nano-TiO2 crystal. Furthermore the electrorheological effect is associated with the TiO2 mass percent in the nanocomposite particle. When the content of TiO2 in the composite is 34%, E=3kV/mm, and volume fraction is 25%, the yield stress of kaolinite/TiO2 nanocomposite ERF is 3.4 kPa, which is 5 times of that of kaolinite.

Key words: kaolinite, TiO2, electrorheological fluids, sol-gel

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