酪素基MOFs微胶囊皮革涂饰材料的设计、合成及其长效抗菌/阻燃机制

酪素作为皮革涂饰材料在制革工业中一直占有极其重要的地位。然而，传统的该类材料不耐微生物侵蚀，成膜硬脆且功能性不足，难以满足高端市场包括民用和军工等领域对皮革及其制品的高品质需求。针对以上问题，基于申请人多年从事酪蛋白改性与功能化机制的研究基础，本项目提出：采用微胶囊技术，将酪素、MOFs、纳米Al(OH)3和抗菌剂等有机结合，构筑具有透气、阻燃及长效抗菌等性能的绿色化皮革涂饰材料。通过己内酰胺改性酪素调控涂层柔韧性；利用MOFs孔道结构及酪素固有成膜不致密性增强涂层透气性；依靠纳米Al(OH)3壳层赋予涂层阻燃性；通过优化MOFs组成并有效包覆抗菌剂，实现涂层长效抗菌，并进一步构筑功能皮革表面。本项目拟揭示合成参数对微胶囊的结构调控机制；建立微胶囊结构、涂膜结构与涂层性能之间的相关性。截至目前本项目所含研究内容鲜见报道。本研究将为新型特种皮革涂饰材料和相关领域的功能涂层材料开发提供新思路。

As a kind of leather finishing materials, casein plays an important role in leather-making industry. However, in most cases, traditional casein leather finishing materials can hardly meet the demand for greening and high quality leather products especially in civil and military fields. The applicant has been engaged in the modification and functionalization of natural products such as casein and its application in leather finishing. In order to solve the above problems, this project proposes to use microcapsule technology to combine casein, MOFs and nanometer Al(OH)3 with antimicrobial agents to craft a green leather finishing material with breathability, flame retardant and long-lasting antibacterial properties. Flexibility of the coating is controlled by caprolactam modification of casein. The porous structure of MOFs and the inherent membrane formation of casein are used to give good air permeability to the coating; Relying on the shell layer nanometer Al(OH)3 to achieve flame retardant property; Through screening and optimization of MOFs ligands, as well as effectively covering antimicrobial agents, long-term antibacterial coating was to be achieved, and the functional leather surface was further constructed. The structure control mechanism of composite microcapsules with synthetic parameters is to be revealed. The correlation between microcapsule structure, coating structure and its properties will be established. Up to now, there are few reports on this research field. This research will provide new ideas for the development of new special leather finishing materials and functional coating materials in related fields.