Koizumi Rin, Atsuta Yuya, Fameau Anne-Laure, Mitamura Koji, Watase Seiji, Higashimoto Shinya, Hirai Tomoyasu, Nakamura Yoshinobu, Fujii Syuji
Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka, 535-8585, Japan.
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.
Macromol Rapid Commun. 2024 Dec;45(23):e2400448. doi: 10.1002/marc.202400448. Epub 2024 Oct 3.
In recent years, fatty acids have garnered significant attention as a natural phase-change material and a hydrophobizer due to their biocompatibility and biodegradability. In this study, the utilization of fatty acid is proposed as a polymerization medium for the first time. As a specific reaction, chemical oxidative polymerizations of pyrrole is conducted using ferric chloride as an oxidant in a stearic acid medium. The polymerizations resulted in the production of micrometer-sized polypyrrole (PPy) grains, which are aggregates of atypical primary particles with submicrometer size. The PPy grains are doped with stearic acid, suggesting that the stearic acid functioned as a dopant and a hydrophobizing agent as well as a polymerization medium. The dried PPy grains can adsorb at the air-water interface and function as a liquid marble stabilizer with light-to-heat photothermal properties. The liquid marble can move on a planar air-water interface by Marangoni flow induced by NIR laser light irradiation.
近年来，脂肪酸因其生物相容性和生物降解性，作为一种天然相变材料和疏水化剂受到了广泛关注。在本研究中，首次提出将脂肪酸用作聚合介质。作为一个具体反应，以氯化铁为氧化剂，在硬脂酸介质中进行吡咯的化学氧化聚合。聚合反应生成了微米级的聚吡咯（PPy）颗粒，这些颗粒是由亚微米级的非典型初级颗粒聚集而成。PPy颗粒中掺杂有硬脂酸，这表明硬脂酸不仅起到了掺杂剂、疏水化剂的作用，还充当了聚合介质。干燥后的PPy颗粒能够吸附在空气 - 水界面，并作为具有光热转换特性的液滴弹稳定剂发挥作用。通过近红外激光照射引发的马兰戈尼流，液滴弹可以在平面空气 - 水界面上移动。
