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Tunable Surfaces and Films from Thioester Containing Microparticles.

Alina M Martinez1, Lewis M Cox2, Amir Darabi2

  • 1Department of Materials Science and Engineering, University of Colorado Boulder, 596 UCB, Boulder, Colorado 80309, United States.

ACS Applied Materials & Interfaces
|July 25, 2025
PubMed
Summary
This summary is machine-generated.

Researchers created cohesive films from thioester microparticles using thiol-thioester exchange. This method allows for controlled material properties in coatings, adhesives, and 3D printing applications.

Keywords:
covalent adaptable networkinterfacial weldingparticle coalescencespatial depositionspatial patterningthiol−thioester exchange

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • Thioester-containing microparticles offer potential for dynamic material formation.
  • Controlling particle coalescence is key for creating functional films.

Purpose of the Study:

  • To design and synthesize thioester microparticles for cohesive film formation.
  • To investigate the mechanism and efficiency of thiol-thioester exchange for film development.
  • To evaluate the mechanical properties and potential applications of the resulting films.

Main Methods:

  • Thiol-Michael dispersion polymerization to synthesize microparticles (4.0 ± 0.4 μm).
  • Activation of thiol-thioester exchange using base swelling.
  • Compression of particles between glass slides.
  • Characterization using profilometry, atomic force microscopy (AFM), and tensile testing.
  • Welding microparticles to a nondynamic network.

Main Results:

  • Successful formation of cohesive films from thioester microparticles.
  • Demonstrated control over film properties via catalyst loading and time.
  • Tensile tests confirmed the structural integrity of the particle-based films.
  • Feasibility of welding microparticles to existing materials was shown.

Conclusions:

  • Thiol-thioester exchange is an effective method for creating cohesive films from microparticles.
  • The developed materials show promise for applications requiring tunable mechanical properties.
  • This approach enables spatial patterning and selective control of material properties in advanced manufacturing.