Photoresponsive polyesters for tailorable shape memory biomaterials
Abstract
The synthesis of a library of poly(ester urethane)s (PEUs) containing pendant photoresponsive moieties afforded through the incorporation of one of two novel bifunctional monomers resulted in degradable materials with a range of tunable thermal and mechanical properties. Utilizing light irradiation, macroscopic temporary shapes were fixed by increasing the cross-link density of a thermoset network via photoinduced reversible [2 + 2] cycloaddition of cinnamamide or cinnamate pendant groups under UV light (λ = 302 nm). Further irradiation with UV light (λ = 254 nm) led to the cleaving of the temporary cross-links and recovery of the original shape. Examination of these materials under physiological conditions displayed tunable degradation with rates faster than PCL-based materials, and initial biocompatibility studies exhibited negligible cytotoxicity for HeLa cells based on results of ATP assay. The ability to tune thermal properties also allowed specific polymer compositions to boast transition temperatures within a range of applicable temperature for thermal shape memory.
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Rochette and Ashby designed new biodegradable PUR pre-polymers having pendant photoresponsive moiety within each repeating unit, offering a uniform distribution along the polymer backbone.
“In 2013, Rochette and Ashby designed new biodegradable PUR pre-polymers having pendant photoresponsive moiety within each repeating unit and consequently offering a uniform distribution along the polymer backbone.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [56]
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Shape-memory polymers for multiple applications in the materials world
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- Authors
- Rochette, J. M., & Ashby, V. S.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- Corresponding author
- Ashby, Valerie Sheares
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-03-08
- Volume
- 46
- Issue
- 6
- Pages
- 2134-2140
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2035045288
- Cited by
- 68
- References
- 15
- Citations by year
- 2025: 5 · 2024: 7 · 2023: 3 · 2022: 7 · 2021: 1 · 2020: 9 · 2019: 12 · 2018: 7 · 2017: 5 · 2016: 5 · 2015: 4 · 2014: 2 · 2013: 1
- FWCI
- 2.89
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecules (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Chemistry › Organic Chemistry › Photopolymerization techniques and applications
- Keywords
- shape memory polymers, biomaterials, cinnamamide, cinnamic acid derivatives, shape recovery, tunable degradation, biocompatibility, cytotoxicity, thermoset networks, polycaprolactone
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