Abstract:

Photocuring technology is highly efficient, adaptable, economical, energy-saving and environmentally friendly, making photocuring polymeric materials widely used in human production and life in recent years. However, the structural stability of Photocuring polymeric polymers makes it difficult to repair the materials once they are broken on the surface or inside, resulting in a large amount of wasted resources and environmental pollution. Dynamic covalent bonds can be reversibly broken and reorganized under the action of external stimuli (light, heating, etc.), which leads to dynamic adjustment of molecular topology and gives light-cured polymer materials structural adjustability, recyclability and self-healing properties. This paper reviewed the design and preparation of photocuring polymeric materials based on ester bonds, Diels-Alder reaction, disulfide bonds, borate ester bonds, site-resistant urea bonds and other reversible covalent bond self-repairs in recent years, summarized the advantages, disadvantages and applications of different types of dynamically covalently bonded photocuring polymeric materials in recent years, and finally pointed out the weaknesses of the mechanical properties of dynamically covalently bonded photocuring polymeric materials and the singularity of the former based on dynamically covalent bond repair, and gave an outlook on the future research directions in this field.

Key words: dynamic covalent bond, healing, photocuring, polymer, synthesis

摘要：

光固化技术的高效、适应性广、经济、节能与环境友好等特点使得近年来光固化高分子材料在人类生产生活中被广泛应用。然而，光固化高分子材料的结构稳定性使得材料表面或内部一旦出现破损便难以修复，造成大量资源浪费与环境污染。动态共价键可以在外界刺激作用下（光照、加热等）发生可逆的断裂和重组，从而导致分子拓扑结构的动态调整，赋予光固化高分子材料结构可调整、可循环利用和自修复性能等。本文综述了近些年来基于酯键、Diels-Alder反应、二硫键、硼酸酯键、位阻脲键等可逆共价键自修复的光固化高分子材料设计与制备，对近年来不同类型动态共价键光固化高分子材料的优缺点和应用进行了评述，最后指出动态共价键光固化高分子材料力学性能的弱势以及基于动态共价键修复的单一性，并对该领域未来的研究方向作了展望。

关键词: 动态共价键, 修复, 光固化, 聚合物, 合成