Fan Ping, Xue Can, Zhou Xiantai, Yang Zujin, Ji Hongbing
Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China.
Materials (Basel). 2021 May 20;14(10):2680. doi: 10.3390/ma14102680.
As stiff polymers are difficult to self-heal, the balance between polymers' self-healing ability and mechanical properties is always a big challenge. Herein, we have developed a novel healable stiff polymer based on the Si-OR and Si-OSi dynamic covalent bonds. The self-healing mechanism was tested and proved by the small molecule model experiments and the contrast experiments of polymers. This polymer possesses excellent tensile, bending properties as well as room temperature self-healing abilities. Moreover, due to the sticky and shapeable properties under wetting conditions, the polymer could be used as an adhesive. Besides, even after four cycles of recycling, the polymer maintains its original properties, which meets the requirements of recyclable materials. It was demonstrated that the polymer exhibits potential application in some fields, such as recyclable materials and healable adhesives.
由于刚性聚合物难以自我修复，聚合物的自我修复能力与机械性能之间的平衡一直是一个巨大的挑战。在此，我们基于Si-OR和Si-OSi动态共价键开发了一种新型的可自愈刚性聚合物。通过小分子模型实验和聚合物的对比实验对其自愈机理进行了测试和验证。这种聚合物具有优异的拉伸、弯曲性能以及室温自我修复能力。此外，由于在湿润条件下具有粘性和可成型性，该聚合物可用作粘合剂。此外，即使经过四个循环的回收利用，该聚合物仍能保持其原始性能，满足可回收材料的要求。结果表明，该聚合物在可回收材料和可自愈粘合剂等一些领域具有潜在的应用价值。
