Polyurethane networks based on disulfide bonds: from tunable multi-shape memory effects to simultaneous self-healing
| Autor: | Xiao-Ying Deng, Yu-Zhong Wang, Chuan-Ying Cheng, Lan Du, Ke-Ke Yang, Cheng-Jie Fan, Hui Xie |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Process (computing) Nanotechnology 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Smart material 01 natural sciences 0104 chemical sciences Dual (category theory) chemistry.chemical_compound chemistry Covalent bond Self-healing General Materials Science 0210 nano-technology Glass transition Polyurethane |
| Zdroj: | Science China Materials. 62:437-447 |
| ISSN: | 2199-4501 2095-8226 |
| Popis: | With the prompt development in intellectualization nowadays, the smart materials with multifunctionality or multi-responsiveness are highly expected. But it is a big challenge to integrate the different actuating units into a single system in a synergy pattern. Herein, we put forward a new strategy to develop the polyurethane networks which can present shape-memory effect and self-healing effect in independent way as well as simultaneous acting mode. To realize this goal, poly(tetremethylene ether) glycol was chosen as the soft segment to ensure the polymer chains a good mobility, and disulfide bond as the dynamic covalent bond was embedded in the backbone of polyurethane to endow it with desirable self-healing capacity under mild condition. Moreover, a rational control of the architecture of the networks by adjusting the content of disulfide bond and the degree of cross-linking, a broad glass transition temperature ( T g) was achieved, which enabled the network a versatile shape-memory effect, covering from dual-, triple- so far as to quadruple-shape memory effect. More importantly, the shape recovery and healing process can be realized simultaneously because of the highly matched actuating condition in this system. |
| Databáze: | OpenAIRE |
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