Electrorheological Performance of SiO2 Particle Materials of Ce-Doping and Adsorbed Chitosan
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第3期
论文作者：ZHANG Yuanjing Li Junran Shang Yanli Zhang Shaohua Gao Song
Key words：particle material; electrorheological performance; Ce-doping SiO2; chitosan;
Abstract: The electrorheological(ER) materials of pure SiO2 ( Sample 1 ), Ce-doping SiO2 ( Ce-SiO2, Sample 2) and Ce-SiO2 adsorbed chitosan (Ce-SiO2-chitosan, Sample 3 ) were prepared using Na2SiO3, Ce( NO3 )3 and chitosan as starting materials. Their ER properties were studied. The results show that Ce-doping can enhance the ER activity of SiO2, and the ER activity of SiO2 can be further improved by adsorbing chitosan on the surfaces of Ce-SiO2 particles.The ER activity of a particle material is correlated with the average grain size, surface area, pore volume and average pore size of the material.
ZHANG Yuanjing1，Xu Mingyuan2，Li Junran3，Shang Yanli3，Ma Shuzhen2，Zhang Shaohua4，Gao Song3，Li Shuxin3
(1.Department of Chemistry, Shijiazhuang College, Shijiazhuang 050035, China;
2.Department of Chemistry, Baoding Teacher's College, Baoding 071051, China;
3.State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
4.School of Vehicle and Transmission Engineering, Beijing Institute of Technology, Beijing 100081, China)
Abstract:The electrorheological(ER) materials of pure SiO2 ( Sample 1 ), Ce-doping SiO2 ( Ce-SiO2, Sample 2) and Ce-SiO2 adsorbed chitosan (Ce-SiO2-chitosan, Sample 3 ) were prepared using Na2SiO3, Ce( NO3 )3 and chitosan as starting materials. Their ER properties were studied. The results show that Ce-doping can enhance the ER activity of SiO2, and the ER activity of SiO2 can be further improved by adsorbing chitosan on the surfaces of Ce-SiO2 particles.The ER activity of a particle material is correlated with the average grain size, surface area, pore volume and average pore size of the material.
Key words:particle material; electrorheological performance; Ce-doping SiO2; chitosan;
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