Influence of surface modification of SrFe12O19 particles with oleic acid on magnetic microsphere preparation--颗粒学报PARTICUOLOGY

Kong, S., Zhang, P., Wen, X., Pi, P., Cheng, J., Yang, Z., & Hai, J. (2008). Influence of surface modification of SrFe12O19 particles with oleic acid on magnetic microsphere preparation. Particuology, 6(3), 185–190. https://doi.org/10.1016/j.partic.2008.03.004

Influence of surface modification of SrFe₁₂O₁₉ particles with oleic acid on magnetic microsphere preparation

Sifang Kong ^a *, Peipei Zhang ^a, Xiufang Wen ^a, Pihui Pi ^a, Jiang Cheng ^a, Zhuoru Yang ^a, Jing Hai ^{a b}

a School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 501640, China
b South China Institute of Environmental Sciences, SEPA, Guangzhou 510655, China

10.1016/j.partic.2008.03.004

Volume 6, Issue 3, June 2008, Pages 185-190

Received 10 January 2008, Accepted 2 March 2008, Available online 27 May 2008.

E-mail: mengsiksf@163.com

Highlights

Abstract

Oleic acid was used as surface modification agent to improve the hydrophobicity of magnetic strontium hexaferrite particles. The structure and properties of treated magnetic particles were characterized by scanning electronic microscopy (SEM), Fourier transform infrared spectra (FTIR), powder X-ray diffraction (XRD) and magnetic property measurement system (MPMS). The results show that oleic acid is chemically enwrapped on the surface of SrFe₁₂O₁₉ particles. Magnetic particles modified by oleic acid are highly dispersible and strongly responsive to magnetism but with slight decrease in saturated magnetization. The affinity between magnetic particles and monomers is improved by surface modification, resulting in increased particle incorporation in magnetic polymeric microspheres. The surface modification mechanism of magnetic particles by oleic acid is addressed in this work.

Graphical abstract

Keywords

Oleic acid; Surface modification mechanism; Strontium hexaferrite; Dispersibility; Magnetic polymeric microsphere

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