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

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

doi:10.1021/acs.langmuir.3c00311

Cited by 5 publications

(1 citation statement)

References 53 publications

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“…[ 2–13 ] Furthermore, the LMs can be disintegrated by applying external stimuli, including pH, temperature, magnetic field, and mechanical force, resulting in the release of the internal liquid. [ 5 ] Due to these characteristics, research on LMs has yielded a number of intriguing applications, such as miniature reactors, [ 6,9,14–22 ] sensors, [ 23–27 ] carriers of materials, [ 4,28–32 ] microfluidics [ 33 ] and powdered pressure‐sensitive adhesives. [ 34 ]…”

Section: Introductionmentioning

confidence: 99%

How Wide and High can Polyhedral Liquid Marbles be Fabricated?

Hayashi,

Manabe,

Hirai

et al. 2024

Adv Materials Inter

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Liquid marbles (LMs) are liquid droplets in gaseous phase, which are generally millimeter size, coated by solid particles. In this study, how wide and high LMs can be fabricated is investigated. Polyhedral LMs are fabricated using polymer plates with millimeter to meter sizes as a stabilizer and water as an inner liquid. Rectangular LMs with widths exceeding 1 m, the largest width ever reported, can be successfully fabricated. The height of the LMs is found to be subject to restriction by the hydrostatic pressure and cubic LMs with heights of up to 5 mm, which is the maximum height limit for LMs stabilized with nano/micrometer‐sized particles, are fabricated. Reduction of the hydrostatic pressure by changing the LM shape from cube to pyramid and introduction of particle‐stabilized bubble into the LM enabled the increase of height of the LM up to 9.8 mm, the highest height ever reported. Investigation using non‐aqueous liquids as an inner liquid confirmed that the longer the capillary length, the higher the maximum possible height of LMs. Finally, the polyhedral LMs are demonstrated to function as a microreactor for silver mirror reaction and chemical oxidative polymerization, resulting in the formation of Janus polymer plates.

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Section: Introductionmentioning

confidence: 99%

How Wide and High can Polyhedral Liquid Marbles be Fabricated?

Hayashi,

Manabe,

Hirai

et al. 2024

Adv Materials Inter

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Polyhedral Vinyl Polymer Particles Synthesized Via Solvent‐Free Radical Polymerization

Yoshida,

Aoki,

Hirai

et al. 2024

Macromol. Rapid Commun.

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Liquid marbles (LMs) with a cubic shape are created by using various vinyl monomers as an inner liquid and polymer plates with mm size as a stabilizer. The relationship between the surface tension of the vinyl monomers and formability of the LMs is investigated. LMs can be fabricated using vinyl monomers with surface tensions of 42.7–40.3 mN m−1. The cubic polymer particles are successively synthesized via free‐radical polymerizations by irradiation of the cubic LMs with UV light in a solvent‐free manner. In addition, controlling the number of polymer plates per one LM, the shape of the plate or the coalescence of the LMs can lead to production of polymer particles with desired forms (e.g., Platonic and rectangular solids) that correspond to the shapes of the original LMs.

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Non‐Aqueous Polyhedral Liquid Marbles Stabilized with Polymer Plates Having Surface Roughness

Iwata,

Yoshida,

Hirai

et al. 2024

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Hydrophobic polymer plates with smooth and rough surfaces are used as a stabilizer for cubic liquid marbles (LMs) to study the effect of surface roughness on their formation. The smooth and rough polymer plates can stabilize LMs using liquids with surface tensions of 72.8–26.6 and 72.8–22.9 mN m−1, respectively. It is clarified that the higher the surface roughness, the lower the surface tension of the liquids are stabilized to form the LMs. These results indicated that the introduction of surface roughness improves the hydrophobicity of the polymer plates and the rough polymer plates can stabilize LMs using liquids with a wider surface tension range. Electron microscopy studies and numerical analyses confirmed that the LMs can be formed, when the Cassie‐Baxter wetting state, where θY>90° (θY: the contact angle on smooth surfaces) and θR>90° (θR: the contact angle on rough surfaces), and the metastable Cassie‐Baxter wetting state, where θY<90° and θR>90°, are realized. Finally, the synthesis of cubic polymer particles are succeeded by free radical polymerization of the cubic LMs containing a hydrophobic vinyl monomer (dodecyl acrylate) in a solvent‐free manner.

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

Cited by 5 publications

References 53 publications

How Wide and High can Polyhedral Liquid Marbles be Fabricated?

How Wide and High can Polyhedral Liquid Marbles be Fabricated?

Polyhedral Vinyl Polymer Particles Synthesized Via Solvent‐Free Radical Polymerization

Non‐Aqueous Polyhedral Liquid Marbles Stabilized with Polymer Plates Having Surface Roughness

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