Preparation of micrometer-sized, monodisperse "janus" composite polymer particles having temperature-sensitive polymer brushes at half of the surface by seeded atom transfer radical polymerization

Langmuir : the ACS Journal of Surfaces and Colloids
Hasan AhmadMasayoshi Okubo

Abstract

Micrometer-sized, monodisperse polystyrene (PS)/poly[methyl methacrylate-(chloromethyl)styrene] [P(MMA-CMS)] composite particles having hemispherical structure were prepared by solvent evaporation from toluene droplets containing dissolved PS and P(MMA-CMS) dispersed in aqueous solution, which had been prepared using the membrane method. The formation of hemispherical ("Janus") morphology by phase separation between the PS and the P(MMA-CMS) was confirmed by both optical and electron microscopy. Atom transfer radical polymerization (ATRP) of 2-(dimethylamino)ethyl methacrylate (DM) was subsequently carried out in the presence of hemispherical PS/P(MMA-CMS) composite particles in an aqueous dispersed system. After polymerization, the morphology of the particles changed from spherical to "mushroom" shape as observed by scanning electron microscopy, indicating that DM polymerized inside or on the surface of half [P(MMA-CMS) phase] of the particles. 1H NMR spectra were consistent with chloromethyl functional groups in P(MMA-CMS) operating as ATRP initiators in the DM polymerization.

References

Dec 13, 2001·Chemical Reviews·M KamigaitoM Sawamoto
Dec 26, 2001·Chemical Reviews·K Matyjaszewski, J Xia
May 31, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Nicole GlaserGeorg Krausch

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Citations

Feb 12, 2013·ACS Applied Materials & Interfaces·Chariya KaewsanehaAbdelhamid Elaissari
Mar 14, 2013·ACS Applied Materials & Interfaces·Hiroshi YabuHiroshi Jinnai
Apr 26, 2012·Chemical Society Reviews·Jing HuLimin Wu
Sep 4, 2015·Advances in Colloid and Interface Science·Goran T Vladisavljević
Apr 2, 2010·ACS Applied Materials & Interfaces·Shengrong Ye, R Lloyd Carroll
Dec 10, 2016·ACS Applied Materials & Interfaces·Hang ZhangZhenzhong Yang

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