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Mechanical Evaluation of Hydrogel-Elastomer Interfaces Generated through Thiol-Ene Coupling.

Khai D Q Nguyen1,2, Stéphane Dejean3, Benjamin Nottelet3

  • 1Institute of Bioengineering, Queen Mary, University of London, Mile End Road, London E1 4NS, U.K.

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|February 23, 2023
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Summary
This summary is machine-generated.

Thiol-ene coupling enables strong mechanical integration of hydrogel-elastomer hybrids for tissue engineering. This method effectively bonds various elastomers to hydrogels without extra chemical groups, creating robust scaffolds.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Hybrid hydrogel-elastomer scaffolds are crucial for tissue engineering and advanced in vitro models.
  • Thiol-ene coupling offers a method for mechanically integrating these materials without additional chemical modifications.
  • Detailed characterization of hydrogel-elastomer bonding using thiol-ene chemistry is lacking.

Purpose of the Study:

  • To quantify the tensile mechanical properties of hybrid hydrogel-elastomer scaffolds.
  • To investigate the impact of radical thiol-ene coupling on material crosslinking and mechanical behavior.
  • To assess the bonding strength between thiol-ene hydrogels and various alkene-functionalized elastomers.

Main Methods:

  • Fabrication of hybrid scaffolds by bonding hydrogels to silicone or polyester elastomers.
  • Utilizing radical thiol-ene coupling for material integration.
  • Tensile testing to evaluate mechanical properties and failure behavior of the hybrid structures.

Main Results:

  • Demonstrated strong bonding between thiol-ene hydrogels and alkene-presenting elastomers (silicones, polyesters).
  • Quantified tensile mechanical properties of the resulting hybrid structures.
  • Showcased the impact of thiol-ene coupling on crosslinking and mechanics of both hydrogel and elastomer components.

Conclusions:

  • Thiol-ene coupling is an effective strategy for creating robust, mechanically integrated hybrid hydrogel-elastomer structures.
  • This approach facilitates the generation of advanced scaffolds for tissue engineering and microfluidic applications.
  • The method provides strong bonding across diverse elastomer chemistries.