Nonspherical Epoxy Resin Polymer Particles Synthesized via Solvent-Free Polyaddition Reactions

Shoichiro Aoki; Tatsuro Yoshida; Hung K Nguyen; Ken Nakajima; Tomoyasu Hirai; Yoshinobu Nakamura; Syuji Fujii

doi:10.1021/acs.langmuir.3c00311

Nonspherical Epoxy Resin Polymer Particles Synthesized via Solvent-Free Polyaddition Reactions

Langmuir. 2023 Apr 25;39(16):5872-5879. doi: 10.1021/acs.langmuir.3c00311. Epub 2023 Apr 11.

Authors

Shoichiro Aoki¹, Tatsuro Yoshida², Hung K Nguyen³, Ken Nakajima³, Tomoyasu Hirai^{2

4}, Yoshinobu Nakamura^{2

4}, Syuji Fujii^{2

4}

Affiliations

¹ Division of Applied Chemistry, Environmental and Biomedical Engineering, Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan.
² Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan.
³ Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8552, Japan.
⁴ Nanomaterials Microdevices Research Center, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan.

PMID: 37039828
DOI: 10.1021/acs.langmuir.3c00311

Abstract

Cubic liquid marbles (LMs) were fabricated by using various epoxy monomers as internal liquids and millimeter-sized polymer plates as stabilizers. Successively, cubic polymer particles were synthesized via solvent-free polyaddition reactions by exposing the cubic LMs to NH₃ vapor used as a curing agent. The effect of the solubility parameters (SPs) for the epoxy monomers on the formation of the cubic polymer particles was investigated. As a result, we succeeded in fabricating cubic polymer particles reflecting the shapes of the original LMs by using epoxy monomers with SP values of 23.70-21.66 (MPa)^1/2. Furthermore, the shapes of the LMs could be controlled on demand (e.g., pentahedral and rectangular) by control of the number of polymer plates per LM and/or coalescence of the LMs, resulting in fabrication of polymer particles with shapes reflecting those of the LMs.