Cagelike polymer microspheres with hollow core/porous shell structures |
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| Authors: | Xiaodong He Xuewu Ge Huarong Liu Mozhen Wang Zhicheng Zhang |
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| Institution: | 1. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of ChinaDepartment of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China;2. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China |
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| Abstract: | Submicron‐scaled cagelike polymer microspheres with hollow core/porous shell were synthesized by self‐assembling of sulfonated polystyrene (PS) latex particles at monomer droplets interface. The swelling of the PS latex particles by the oil phase provided a driving force to develop the hollow core. The latex particles also served as porogen that would disengage automatically during polymerization. Influential factors that control the morphology of the microspheres, including the reserving time of emulsions, polymerization rate, and the Hildebrand solubility parameter and polarity of the oil phase, were studied. A variety of monomers were polymerized into microspheres with hollow core/porous shell structure and microspheres with different diameters and pore sizes were obtained. The polymer microspheres were characterized by scanning electron microscopy, transmission electron microscopy, optical microscopy, and Fourier transform infrared spectroscopy. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 933–941, 2007 |
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| Keywords: | cagelike polymer microspheres emulsion droplet interface hollow core/porous shell morphology control self‐assembly latex particles |
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