Spatial Control of Mechanical Properties and Surface Topography in a Photoreactive Block Copolymer Hydrogel
| Autor: | Travis S. Bailey, Nabila A. Huq |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Anthracene
education.field_of_study Materials science Polymers and Plastics Ethylene oxide Organic Chemistry Population 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Micelle 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound chemistry Chemical engineering Materials Chemistry Copolymer Thermoplastic elastomer 0210 nano-technology education |
| Zdroj: | Macromolecules. 51:7734-7744 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/acs.macromol.7b02247 |
| Popis: | A simple method for spatially directed mechanical reinforcement and surface feature introduction on a photoactive block copolymer-based thermoplastic elastomer hydrogel is presented. The hydrogel material comprises two primary spherical micelle-forming block copolymer species: photoactive ω-anthracenylpolystyrene-b-poly(ethylene oxide) diblock copolymer (SO-anth) and polystyrene-b-poly(ethylene oxide)-b-polystyrene triblock copolymer (SOS). The PEO midblock of the SOS triblock copolymer species provides a physical tether between adjacent micelles, increasing mechanical robustness (modulus) with addition of bridging SOS chains. The photoactive SO-anth diblock copolymer contains a terminal anthracene unit capable of dimerization by application of 365 nm light to induce a [4 + 4] photocycloaddition. The ability to photocouple chain termini populating the outer shell of the hydrophilic micelle coronas produces additional SOS triblock copolymer in situ. While the initial population of SOS tethers act to form a... |
| Databáze: | OpenAIRE |
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