Photo-Switchable Cross-Linking in Polymer Gels: Effects on Surface Creasing and Network Relaxation during Swelling
Alyssa VanZanten, Surbhi Punhani-Schillinger, M. Reed Blocksome, Aditya Ketkar, Shih-Yuan Chen, Michelle M. Driscoll +2 · arXiv · 2025
This study explores photo-responsive polymer gels that enable tunable mechanics and surface morphologies for adaptive materials.
Plain English summary
Why this matters
Key findings
- PEG hydrogels with dynamic coumarin cross-links can be modulated using UV light.
- Post-cure irradiation at 365 nm increases storage modulus by up to 69%.
- Cleavage of coumarin cross-links via 254 nm irradiation has limited effects.
- Dynamic cross-linking influences swelling-induced crease formation.
- Establishes design principles for hydrogels with programmable mechanics.
What's new
The study provides new insights into the network-level mechanical responses of photo-responsive polymer gels, particularly in relation to their swelling behavior and surface morphology.
Limitations
The abstract does not discuss the long-term stability of the cross-links or the practical challenges of implementing these materials in real-world applications.
Commercial context
The research is still in the laboratory phase and has not yet been demonstrated in practical applications.
Publication
- Publisher
- arXiv
- Publication date
- November 12, 2025
- Research type
- Preprint
- arXiv
- 2511.09520
- Access
- open
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