基于动态共价键的聚硅氧烷的制备及性能应用的研究进展

Silicone rubber products play an irreplaceable role in the national economy, national defense and other fields. However, the traditional polysiloxane based on stable covalent bonds exhibits similar characteristics to that of thermosetting resins, the resin cannot be reshaped, reprocessed and recycled once crosslinking. Introducing dynamic covalent bonds into polysiloxane not only gives it reprocessing and healing properties, but also creates many new materials with high added-value, which is of great significance to the circular economy and sustainable development. This review focused on the preparation and application of polysiloxane elastomers based on dynamic covalent bond, especially the polysiloxane elastomers with excellent mechanical properties, self-healing, processable and multifunctional properties. In addition, the current challenges and future development trends of polysiloxane elastomers based on dynamic covalent bond were also summarized and prospected.