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Scalable Synthesis of Janus Particles with High Naturality

Lan, Y; Wu, J; Han, SH; Yadavali, S; Issadore, D; Stebe, KJ; Lee, D; (2020) Scalable Synthesis of Janus Particles with High Naturality. ACS Sustainable Chemistry and Engineering , 8 (48) pp. 17680-17686. 10.1021/acssuschemeng.0c04929. Green open access

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Abstract

Because of the increasing concerns about the ecological damage and negative health effects that may be caused by petrochemical-based microbeads, many countries are banning their use in a wide range of consumer products. One particular class of particles that may never reach their full potential because of such a ban is Janus particles, which are particles with two opposite properties. Despite significant progress in the scalable synthesis of Janus particles, most studies rely on petrochemical-based materials and solvents to enable their synthesis. In this report, we present a single-emulsion polymerization method for scalable synthesis of amphiphilic Janus particles with materials derived from plants. Soybean oil-epoxidized acrylate (SBOEA) monomers are polymerized in single-emulsion droplets of SBOEA, ethyl cellulose (EC), butyl acetate, and initiators that can be generated by either bulk or microfluidic emulsification, leading to the formation of amphiphilic soybean oil polymer/EC (SBOP/EC) Janus particles. Interfacial anchoring of the in situ-formed SBOP particles at the interface of the emulsion droplet plays a key role in the formation of the SBOP/EC Janus particles. Large-scale preparation of uniform SBOP/EC Janus particles is also demonstrated using a glass-silicon microfluidic device. Finally, the SBOP/EC Janus particles show potential to stabilize oil-in-water emulsions that can stay stable under flowing conditions.

Type: Article
Title: Scalable Synthesis of Janus Particles with High Naturality
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acssuschemeng.0c04929
Publisher version: https://doi.org/10.1021/acssuschemeng.0c04929
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: Janus particles, green materials, scalable synthesis, interfacial polymerization, microfluidics
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10117249
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