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Chinese Journal of Materials Research  2016, Vol. 30 Issue (9): 711-716    DOI: 10.11901/1005.3093.2015.184
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Preparation and Property of Fe3O4/P(St-co-MMA) Micro-nano Composites
Wenjuan LEI,Yingxia MA,Peiqing LA,Eryan LIU,Xiangqian LI,Wenjuan ZHANG
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
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Wenjuan LEI,Yingxia MA,Peiqing LA,Eryan LIU,Xiangqian LI,Wenjuan ZHANG. Preparation and Property of Fe3O4/P(St-co-MMA) Micro-nano Composites. Chinese Journal of Materials Research, 2016, 30(9): 711-716.

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Abstract  

Micro-nano composites of Fe3O4/P(St-co-MMA) were in-situ synthesized by inverse coprecipitation method using microspheres of monodispersed styrene-methyl methacrylate copolymer P(St-co-MMA) as carrier, FeCl36H2O and FeSO47H2O as precursor. The microstructure, crystallographic structure, magnetic property, average pore size, volume of pores and BET specific surface area of Fe3O4/P(St-co-MMA) were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) spectroscopy, viberating sample magnetometer (VSM) and nitrogen adsorption/desorption isotherms. The results show that nano paricles of Fe3O4 were successfully deposited on the suface of micro-sized P(St-co-MMA). The mesoporous in Fe3O4/P(St-co-MMA) micro-nano composites were confirmed. The average pore size, the volume of pores, and the BET specific surface area of Fe3O4/P(St-co-MMA) were 15.41 nm, 0.15953 cm3/g and 32.82 m2/g, respectively. The micro-nano composites Fe3O4/P(St-co-MMA) have magnetic property in superparamagnetism and good magnetic response, so Fe3O4/P(St-co-MMA) can meet the requirement for fast solid-liquid separation from liquid suspension with an applied external magnetic field.

Key words:  magnetic materials      Fe3O4/P(St-co-MMA)      an inverse coprecipitation method      superparamagnetism      micro-nano composites     
Received:  05 December 2015     
Fund: DOI: 10.11901/1005.3093.2015.184’ *Supported by National Natural Science Foundation of China No.51403091, Natural Science Foundation of Gansu Province No 1310RJZA081, and Processing and Recycling of Non-ferrous Metals of China No SKL1315

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https://www.cjmr.org/EN/10.11901/1005.3093.2015.184     OR     https://www.cjmr.org/EN/Y2016/V30/I9/711

Fig.1  Scheme for the preparation of Fe3O4/P(St-co-MMA)
Fig.2  SEM image (a), particle size distribution (b) of P(St-co-MMA) and SEM image (c), TEM image (d), EDX spectra (e) and SAED pattern (f) of Fe3O4/P(St-co-MMA)
Fig.3  FTIR spectra of Fe3O4/P(St-co-MMA)
Fig.4  XRD patterns of Fe3O4/P(St-co-MMA)
Fig.5  N2 adsorption/desorption isotherm of Fe3O4/P(St-co-MMA)
Sample BET
(m2/g)
Average pore width (nm) Volume of pores (cm3/g) Ms
(emu/g)
Fe3O4/P(St-co-MMA) 32.82 15.41 0.15953 25.61
P(St-co-MMA) 4.69 7.41 0.00868 ——
Table 1  Physical properties of P(St-co-MMA) and Fe3O4/P(St-co-MMA)
Fig.6  Magnetization curve of Fe3O4/P(St-co-MMA), the insets show the photograph of Fe3O4/P (St-co-MMA) dispersion in ethanol (a) and their magnetic response placed in external magnetic field (b)
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