Cascading responses of stimuli-responsive materials

Oaki, Yuya; Fujii, Syuji

doi:10.1039/d4cc02827a

Chem. Commun.

2024

DOI: 10.1039/d4cc02827a

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Cascading responses of stimuli-responsive materials

Yuya Oaki,

Syuji Fujii

Abstract: Responsiveness to stimuli is important in daily life: natural biological activity is governed by continuous stimulus responsiveness. The design of stimuli-responsive materials is required for the development of advanced sensing...

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2024

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Cited by 3 publications

References 132 publications

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Stearic Acid as Polymerization Medium, Dopant and Hydrophobizer: Chemical Oxidative Polymerization of Pyrrole

Koizumi,

Atsuta,

Fameau

et al. 2024

Macromol. Rapid Commun.

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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.

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Stearic Acid as Polymerization Medium, Dopant and Hydrophobizer: Chemical Oxidative Polymerization of Pyrrole

Koizumi,

Atsuta,

Fameau

et al. 2024

Macromol. Rapid Commun.

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Light‐Based Desalination of Water Using Polypyrrole‐Coated Fabrics

Sakabe,

Matsui,

Funatsu

et al. 2024

Macro Reaction Engineering

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Fabrics consisting of cotton‐core/polypyrrole (PPy)‐sheath fibers (cotton/PPy fabrics) are synthesized by aqueous chemical oxidative seeded polymerization of pyrrole and are utilized as a solar evaporation device. Scanning electron microscopy studies and elemental microanalyses reveal the thickness of the PPy sheath increases from a few tens nm to ≈200 nm with an increase of pyrrole monomer concentration in the polymerization system. The temperature of cotton/PPy fabrics increases upon irradiation with artificial sunlight to ≈33–45 °C in the dry state, due to light‐to‐heat photothermal conversion by the PPy component. Thanks to the photothermal property of the fabrics, water impregnated within the cotton/PPy fabrics can evaporate efficiently under the irradiation of artificial sunlight. Light‐induced water evaporation experiment using an artificial seawater confirms that ionic concentrations drastically decreases, indicating successful desalination.

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Edible liquid marbles stabilized with millimeter-sized spherical particles

Mame-Khady,

Yasui,

Sugiyama

et al. 2024

Current Research in Food Science

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Cascading responses of stimuli-responsive materials

Abstract: Responsiveness to stimuli is important in daily life: natural biological activity is governed by continuous stimulus responsiveness. The design of stimuli-responsive materials is required for the development of advanced sensing...

Cited by 3 publications

References 132 publications

Stearic Acid as Polymerization Medium, Dopant and Hydrophobizer: Chemical Oxidative Polymerization of Pyrrole

Stearic Acid as Polymerization Medium, Dopant and Hydrophobizer: Chemical Oxidative Polymerization of Pyrrole

Light‐Based Desalination of Water Using Polypyrrole‐Coated Fabrics

Edible liquid marbles stabilized with millimeter-sized spherical particles

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