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Structural diversity of multi-hollow microspheres via multiple Pickering emulsion co-stabilized by surfactant

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Abstract

This paper presented a facile approach to fabricate interconnected multi-hollow polymer microspheres by water-in-oil-in-water (W/O/W) multiple emulsions co-stabilized by SiO2 and Span80. Two-step emulsification was employed to obtain W/O/W emulsion, followed by polymerizing the monomer into the skeleton of microspheres. The inner structure of microspheres was successfully regulated by adjusting the relative amount of SiO2 to Span80. A large range of microspheres with different inner structures was obtained, including close-celled microspheres, interior hollowed microspheres, interconnected microspheres by single channel or multi-channels, and bicontinuous structure. A formation mechanism of microspheres with different inner structure was proposed and verified by the characteristic of released Ca2+ from inner aqueous phase to outer aqueous phase. These microspheres have advantages of high surface area, high porosity, and multi-hollow structure.

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Acknowledgments

The supports from the National Nature Science Foundation of China (51173147, 51173146), Natural Science Foundation of Shaanxi Province (2014JM2038), NPU Foundation for Fundamental Research (NWPU-FFR-JC20120250), and graduate starting seed fund of NWPU (Z2014176) are highly appreciated.

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Authors and Affiliations

  1. School of Science, Northwestern Polytechnical University, Xi’an, 710072, China

    Dezhong Yin, Beiqi Li, Jinjie Liu & Qiuyu Zhang

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  1. Dezhong Yin
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  2. Beiqi Li
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  4. Qiuyu Zhang
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Correspondence to Dezhong Yin.

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Yin, D., Li, B., Liu, J. et al. Structural diversity of multi-hollow microspheres via multiple Pickering emulsion co-stabilized by surfactant. Colloid Polym Sci 293, 341–347 (2015). https://doi.org/10.1007/s00396-014-3401-y

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  • DOI: https://doi.org/10.1007/s00396-014-3401-y

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