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Synthesis of snowman-shaped microparticles by monomer swelling and polymerization of crosslinked seed particles

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Abstract

Nonspherical snowman-shaped micro-sized particles were synthesized via monomer swelling and the polymerization of crosslinked seed particles. Monodispersed crosslinked polystyrene microspheres and methylmethacrylate were used as seed particles and the swelling monomer, respectively. Methylmethacrylate (MMA) induced crosslinked polystyrene microparticle swelling; however, compared to polystyrene, MMA is relatively hydrophilic. As a result, phase separation was observed, resulting in monomer-swollen, cross-linked particles protruding from the surface of the seed particles. By changing the monomer-to-particle weight ratio from 4 to 8, the ratio of the size of the head to the body of the snowman-shaped particles was varied from 0.3 to 0.7. The morphologies of the snowman-shaped particles were predicted using Surface Evolver software, and the simulation was applied to show the unique self-organization morphologies of snowman-shaped particles.

We synthesized snowman-shaped microparticles by swelling and polymerizing cross-linked PS seed particles with methylmethacrylate. The monomer-swollen, cross-linked particles exhibited protrusions from the surface of the microparticles due to the phase separation of seeds from the particles. The size of the protrusion or head of the snowmanshaped particles was controlled by changing the monomer-to-particle weight ratio during the swelling process. Simulations were applied to estimate the aspect ratio of snowman-shaped particles and their self-assembled morphologies.

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Authors and Affiliations

  1. Nano Functional Materials Research Group, Department of Powder/Ceramic Materials, Korea Institute of Materials Science, 66, Sangnam-dong, Changwon, Gyungnam, 641-010, Korea

    Young-Sang Cho

  2. Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea

    Shin-Hyun Kim

  3. Department of Chemical and Biomolecular Engineering, Sogang University, 1, Sinsu-dong, Mapo-gu, Seoul, 121-742, Korea

    Jun Hyuk Moon

Authors
  1. Young-Sang Cho
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  2. Shin-Hyun Kim
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  3. Jun Hyuk Moon
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Correspondence to Jun Hyuk Moon.

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Cho, YS., Kim, SH. & Moon, J.H. Synthesis of snowman-shaped microparticles by monomer swelling and polymerization of crosslinked seed particles. Korean J. Chem. Eng. 29, 1102–1107 (2012). https://doi.org/10.1007/s11814-011-0285-0

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  • DOI: https://doi.org/10.1007/s11814-011-0285-0

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