정재필 (Carnegie Mellon University, 현 Georgia Tech) | 한빛사논문 > 한빛사

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정재필Jaepil Jeong

Carnegie Mellon University, 현 Georgia Tech

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J. Am. Chem. Soc., May 01 2024, | https://doi.org/10.1021/jacs.4c02553 Robust Miniemulsion PhotoATRP Driven by Red and Near-Infrared Light

Xiaolei Hu, Rongguan Yin, Jaepil Jeong^*, Krzysztof Matyjaszewski^*

Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.

^*Corresponding Authors : Jaepil Jeong, Krzysztof Matyjaszewski

Abstract

Photoinduced polymerization techniques have gathered significant attention due to their mild conditions, spatiotemporal control, and simple setup. In addition to homogeneous media, efforts have been made to implement photopolymerization in emulsions as a practical and greener process. However, previous photoinduced reversible deactivation radical polymerization (RDRP) in heterogeneous media has relied on short-wavelength lights, which have limited penetration depth, resulting in slow polymerization and relatively poor control. In this study, we demonstrate the first example of a highly efficient photoinduced miniemulsion ATRP in the open air driven by red or near-infrared (NIR) light. This was facilitated by the utilization of a water-soluble photocatalyst, methylene blue (MB ⁺). Irradiation by red/NIR light allowed for efficient excitation of MB ⁺ and subsequent photoreduction of the ATRP deactivator in the presence of water-soluble electron donors to initiate and mediate the polymerization process. The NIR light-driven miniemulsion photoATRP provided a successful synthesis of polymers with low dispersity (1.09 ≤ Đ ≤ 1.29) and quantitative conversion within an hour. This study further explored the impact of light penetration on polymerization kinetics in reactors of varying sizes and a large-scale reaction (250 mL), highlighting the advantages of longer-wavelength light, particularly NIR light, for large-scale polymerization in dispersed media owing to its superior penetration. This work opens new avenues for robust emulsion photopolymerization techniques, offering a greener and more practical approach with improved control and efficiency.

논문정보

형식Research article
게재일2024년 05월 (BRIC 등록일 2024-05-03)
연구진국외 연구진
분야 바이오·의료융합 > 바이오·의료융합 기타

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