Preparation of Cylindrical Janus Particles Using a Stirring Method | Zendy

Miku Onishi | Zendy; Yuya Tsujishita | Zendy; Wei Li | Zendy; Toyoko Suzuki | Zendy; Hideto Minami | Zendy

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Preparation of Cylindrical Janus Particles Using a Stirring Method

Author(s) -

Miku Onishi,

Yuya Tsujishita,

Wei Li,

Toyoko Suzuki,

Hideto Minami

Publication year - 2020

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c04538

Subject(s) - janus particles , materials science , janus , polystyrene , polyvinylpyrrolidone , composite material , polymer , amphiphile , polymer chemistry , nanotechnology , copolymer

We previously discovered a novel method for the preparation of polymer particles that have a cylindrical shape. Polystyrene (PS) or poly methyl methacrylate (PMMA) spherical particles were deformed into a cylindrical shape by stirring with a magnetic stirrer in a polyvinylpyrrolidone (PVP) aqueous solution. In this study, cylindrical "Janus" particles consisting of PS and PMMA were prepared by this stirring method. In the case of spherical Janus particles, cylindrical particles were obtained after stirring; however, the direction of the interface between the PS and PMMA phases was random. However, in the case of snowman-like Janus particles, cylindrical Janus particles with the interface at the center of the long axis were successfully prepared. This indicated that the extension direction can be controlled owing to the anisotropic shape and supported the proposed deformation mechanism of the cylindrical particles. Moreover, amphiphilic cylindrical Janus particles were also successfully prepared by hydrolysis of only one phase to introduce carboxy groups.

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