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Xu J.,Hunan University of Technology | Xu J.,Economical Forest Cultivation and Utilization of 2011 Collaborative Innovation Center | Liu W.,Economical Forest Cultivation and Utilization of 2011 Collaborative Innovation Center | Du J.,Hunan University of Technology | And 6 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2015

Hierarchical particles were prepared by synthetically joining appropriately functionalized polystyrene spheres of poly[styrene-co -(3-(4-vinylphenyl)pentane-2,4-dione)] (PS-co -PVPD) nanoparticles and poly(styrene-co-chloromethylstyrene) (PS-co -PCMS) microparticles. The coupling reaction of nucleophilic substitution of pendent β -diketone groups with benzyl chloride was used to form the hierarchical particles. Since the polymeric nanoparticles and microparticles were synthesized by dispersion polymerization and emulsion polymerization, respectively, both the core microparticles and the surface nanoparticles can be different size and chemical composition. By means of changing the size of the PS-co -PVPD surface nanoparticles, a series of hierarchical particles with different scale ratio of the micro/nano surface structure were successfully prepared. Moreover, by employing the PS- co-PVPD microparticles and PS-co-PCMS nanoparticles as building blocks, hierarchical particles with surface nanoaprticles of different composition were made. These as-prepared hierarchical particles were subsequently assembled on glass substrates to form particulate films. Contact angle measurement shows that superhydrophobic surfaces can be obtained and the contact angle of water on the hierarchically structured surface can be adjusted by the scale ratio of the micro/nano surface structure and surface chemical component of hierarchical particles. Copyright © 2015 American Scientific Publishers All rights reserved Printed in the United States of America. Source

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