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Solvent-Free Synthesis of Shape-Programmable Hydrogel Particles Using Polyhedral Liquid Marbles.

Tatsuro Yoshida1, Riku Sato2, Takayuki Shiihara2

  • 1Division 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.

Langmuir : the ACS Journal of Surfaces and Colloids
|March 7, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a solvent-free method to create diverse nonspherical hydrogel particles using liquid marbles as molds. This technique enables precise shape control for advanced soft materials and functional applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Soft Matter Physics

Background:

  • Nonspherical hydrogel particles offer unique anisotropic properties not achievable with spherical counterparts.
  • Precise shape control of hydrogels is challenging, often requiring complex equipment or organic solvents.

Purpose of the Study:

  • To develop a versatile, solvent-free method for synthesizing geometrically defined nonspherical hydrogel particles.
  • To demonstrate the tunable properties and potential applications of these anisotropic hydrogel particles.

Main Methods:

  • Utilized polyhedral liquid marbles (LMs) as template-guided reaction vessels.
  • Constructed LMs using hydrophobic polymer plates around monomer droplets with a photoinitiator.
  • Initiated polymerization via UV irradiation to form hydrogel particles mirroring LM shapes.

Main Results:

  • Successfully synthesized hydrogel particles in various polyhedral shapes (cubic, tetrahedral, octahedral, dodecahedral, icosahedral).
  • Demonstrated tunable swelling by adjusting cross-linking density and created multihollow structures.
  • Showcased swelling-induced mechanical function in cubic hydrogels, lifting an external object.

Conclusions:

  • The LM-based method provides a simple, solvent-free approach for producing shape-programmable anisotropic hydrogel particles.
  • This technique avoids specialized apparatus and organic solvents, offering a versatile platform for soft materials.
  • Potential applications include soft robotics, stimuli-responsive systems, and 3D hydrogel assemblies.