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Citation: WANG Xiu-Yu, YANG Gui-Qin, ZHANG Zhi-Sheng, YAN Le-Mei, MENG Jian-Hua. Surface Treatment of Magnetic Particles in Preparation of Magnetic Fluids[J]. Chinese Journal of Applied Chemistry, ;2005, 22(5): 525-529. shu

Surface Treatment of Magnetic Particles in Preparation of Magnetic Fluids

1.
a College of Science, Tianjin University, Tianjin 300072;
2.
b College of Electronic Information Engineering, Tianjin University, Tianjin 300072

Corresponding author: YANG Gui-Qin,
Received Date: 16 August 2004
Available Online: 28 December 2004

Magnetic powder particles,which were used for the preparation of magnetic fluids,were modified with a surfactant,oleic acid.The coating on the surface of the magnetic particles was evaluated by UV,and the effects of pH,temperature and time on the surface treatment were analyzed.The results indicate that UV spectral analysis can be used to quantitatively characterize the coating on the magnetic particles.The appro-priate conditions for the surface treatment were identified to be pH=6.90,coating temperature of 80℃,and coating time of 60 min.
- magnetic fluid,
- method of UV spectral analysis,
- oleic acid,
- surface treatment
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