Preparation of Inorganic-organic Composite Hollow Microspheres by Double Pickering Emulsion Template†

doi:10.7503/cjcu20180213

Abstract

Abstract:

Inorganic-organic composite microspheres with hollow structure were prepared using W/O/W double Pickering emulsions stabilized with hydrophobic ZnO particles and hydrophilic Fe₃O₄ as templates. The inorganic particles, emulsions and composite materials were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), Energy dispersive spectrometer(EDS), Fourier transform infrared spectroscopy(FTIR) and optical microscopy. The results showed that the two inorganic particles, ZnO and Fe₃O₄, were prepared. Oleic acid could effectively modify ZnO with a contact angle of 84.3°. The prepared double Pickering emulsion had good stability and wide particle size distribution, ranging from 50 μm to 200 μm. The inorganic-organic composite material prepared using the double emulsion as template is hollow spherical structure with particle size between 100 and 200 μm.

Key words: Pickering emulsion, Hollow microspheres, Modified

CLC Number:

O647
O631

TrendMD:

TONG Yongchun, WANG Qingyun, BAI Qingling, LI Zhen, JIA Chuanming. Preparation of Inorganic-organic Composite Hollow Microspheres by Double Pickering Emulsion Template^†[J]. Chem. J. Chinese Universities, 2018, 39(7): 1462.

Figures/Tables 7

Fig.1 XRD patterns of ZnO(a) and Fe3O4(b)

Fig.2 SEM images of ZnO(A) and Fe3O4(B)

Fig.3 FTIR spectra of ZnO(a) and modified ZnO(b)

Fig.4 Contact angle of water drop on the ZnO(A) and modified ZnO interfaces(B)

Fig.5 Optical microscope image of W/O/W double emulsion

Fig.6 SEM images of microspheres(A) and section(B)

Fig.7 SEM image(A) and EDS spectrum(B) of microspheres

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