Pu, B., Xiao, G., Xiao, J., Yin, H.-B. and Wang, J. (2024) A strategy for improving self-healing efficiency: application of sensitizer in thymine photoresponsive materials. Polymer, 297, 126844. (doi: 10.1016/j.polymer.2024.126844)
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Abstract
Self-healing materials based on photodimerization have advantages such as being fast, efficient, environmentally friendly and controllable. However, most of photoresponsive self-healing materials suffer from a problem that there is a compromise between the strength and the self-healing efficiency. Therefore, most of the research focuses on using flexible materials to reach high self-healing efficiency. The absorption wavelengths of some photosensitive groups are narrow, which limits the application fields of self-healing properties of self-repairing materials. Here, we use photodimerizable thymine as the photoresponsive group and exploit the sensitivity of a methoxyacetophenone photosensitizer to increase the self-healing efficiency of a rigid membrane material from beyond repairing to 85% recovery under the same conditions. The tensile strength of the self-healing material is 33.88 MPa, and the elastic modulus reaches 3 GPa after 80 min of photo-irradiation at 308 nm. The maximum thermogravimetric decomposition rate temperature exceeds 400 °C, exhibiting their excellent thermal stability. This strategy provides a novel and effective approach to endow rigid materials with high self-healing efficiency at benign conditions, and opens a new avenue to functionalise a wide range of rigid engineering materials.
| Item Type: | Articles |
|---|---|
| Additional Information: | The authors express sincere thanks to Anhui Provincial Natural Science Foundation for financial support (Grant No. JZ2019AKZR0215). |
| Keywords: | Thymine, photodimerization, photosensitizer, polymerization kinetics, self-healing efficiency. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Yin, Professor Huabing |
| Authors: | Pu, B., Xiao, G., Xiao, J., Yin, H.-B., and Wang, J. |
| College/School: | College of Science and Engineering > School of Engineering > Biomedical Engineering |
| Journal Name: | Polymer |
| Publisher: | Elsevier |
| ISSN: | 0032-3861 |
| ISSN (Online): | 1873-2291 |
| Published Online: | 29 February 2024 |
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