两亲性SiO2Janus微胶囊构筑超疏水皮革涂层的耐磨与自修复机制研究

在皮革表面构筑超疏水涂层，不仅可以解决皮革沾水发硬变形及易于沾染污染物变脏影响美观的缺点，还可极大拓宽皮革的应用领域。然而，皮革不耐高温、强酸、强碱等，导致现有大多数超疏水涂层构筑方法在其表面难以实现，且现有超疏水涂层的耐久性依然不佳。基于此，本研究提出合成含有可反应性官能团的两亲性SiO2Janus微胶囊，通过简单的喷涂法实现两亲性SiO2Janus微胶囊在皮革表面的定向排列，从而形成超疏水涂层，利用其上可反应性官能团与皮革表面聚氨酯涂层上异氰酸酯基间的化学反应及所封装低表面能物质的可控释放共同实现超疏水涂层耐久性的提升。探求两亲性介孔中空SiO2Janus微球的结构调控规律，揭示其结构参数对低表面能物质封装与释放行为的影响，阐明两亲性SiO2Janus微胶囊在皮革表面构筑超疏水涂层的耐磨机理及自修复机理。该工作有助于丰富超疏水涂层的相关理论，对开发功能型皮革涂层提供了新思路。

The fabrication of superhydrophobic coating on leather can not only solve the defects of deforming with water and getting dirty with pollutants, but also greatly expand the application field of leather. However, leather is not resistant to high temperature, strong acids and alkalis, which makes it difficult to achieve a superhydrophobic coating on leather by most existing fabrication methods. Moreover, the durability of existing superhydrophobic coatings is not prominent. In order to solve the above problems, amphiphilic SiO2 Janus microcapsules containing reactive functional groups will be developed. The directional arrangement of the amphiphilic SiO2 Janus microcapsules on the leather surface will be realized by a simple spraying method to form a superhydrophobic coating on the leather surface. The durability of the superhydrophobic coating will be improved by the chemical reaction between the reactive functional groups of the amphiphilic SiO2 Janus microcapsules and the isocyanate of the polyurethane coating on the leather surface and the controlled release of the low-surface energy materials encapsulated by the amphiphilic SiO2 Janus microcapsules. In this work, the structural regulation of amphiphilic mesoporous hollow SiO2 Janus microspheres will be investigated. The effect of structural parameters of amphiphilic mesoporous hollow SiO2 Janus microspheres on the encapsulation and release behavior of low-surface energy materials will be explored. Meanwhile, the wear-resistance mechanism and self-healing mechanism of the superhydrophobic coating constructed by amphiphilic SiO2 Janus microcapsules on leather will be clarified. This work will be helpful to enrich the related theory of superhydrophobic coatings and provide new ideas for the development of functional leather coatings.