Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 512, Issue -, Pages 600-608Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.10.100
Keywords
Seeded polymerization; Starch-based seed; Shape-tunable macroparticles; Golf-like particles; Raspberry-like particles; Octahedron-like particles; Snowman-like particles
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Funding
- National Natural Science Foundation of China [51673191, 21774124]
- special funds of Science and Technology Cooperation of Chinese Academy of Sciences [2017SYHZ0022]
- Jilin Province Science and Technology Development Project Foundation [20160101306JC]
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Nonspherical colloidal particles with various geometries and different compositions have attracted tremendous attention and been widely researched. The preparation of polymer colloidal particles with controlled shapes by seeded polymerization is recognized as the most promising technique owing to the precise control of various morphologies and using non-cross-linked seed particles are of particular interest. Seeds particles derived from natural biopolymers are seldom applied. Hence, non-cross-linked starch-based seed could be used to fabricate the anisotropic particles by soap-free seed polymerization. Non-cross-linked starch-based seed particles were prepared by a nanoprecipitation method. Starch/polystyrene composite colloidal particles with shape-tunable were fabricated by soap-free seeded polymerization using starch-based seed. The effect of the polymerization time, monomer feed ratio and seed type were investigated. The seed particles with a single- or multi-hole structure were obtained after swelling with styrene. The resulting particles including golf-like, raspberry-like, octahedron-like and snowman-like structures, was fabricated on the polymerization process. This study firstly reports that the morphology of composite particles from golf-like to snowman-like at high monomer feed ratio using starch-based seed. At low monomer feed ratio, raspberry-like particles were obtained by surface nucleation increasing process. In addition, seed type also effect the morphology of composite particles. (C) 2017 Published by Elsevier Inc.
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