A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Super-hydrophobic self-repairing coating as well as preparation method and application thereof
The invention belongs to the technical field of building coatings, and particularly discloses a super-hydrophobic self-repairing coating and a preparation method thereof. According to the super-hydrophobic self-repairing coating, a polyurethane prepolymer is used as a coating matrix, and fluoroalkyl silane modified nanoparticles dispersed in the polyurethane prepolymer are utilized to form a super-hydrophobic coating, so that the super-hydrophobic and anti-pollution effects are achieved; meanwhile, by means of hydrophilic chain segment substances linked to a coating substrate, after the hydrophobicity of the surface of the coating is reduced, the repulsive interaction between the hydrophilic chain segment substances in the coating and the fluorosilane modified nano particles can be enhanced by controlling the humidity in the environment, so that the fluorosilane modified nano particles are discharged, and the super-hydrophobicity of the surface of the coating is recovered; therefore, the purpose of super-hydrophobic self-repairing is achieved, and the engineering durability of the coating is greatly improved. The super-hydrophobic self-repairing process can be achieved only by increasing the environment humidity, the process is simpler and easier to achieve, and it is also guaranteed that the super-hydrophobic self-repairing coating can be applied to the field of more severe environments such as concrete.
本发明属于建筑涂料技术领域，尤其公开了一种超疏水自修复涂料及其制备方法。该超疏水自修复涂料以聚氨酯预聚体为涂料基体，利用分散于其中的氟硅烷改性纳米粒子，形成具有超疏水性的涂层，达到超疏水和抗污的效果；同时利用链接在涂料基体上的亲水链段物，当涂层表面的疏水性降低后，通过对环境中湿度的控制，即可增强涂层中亲水链段物与氟硅烷改性纳米粒子之间的排斥作用，从而将氟硅烷改性纳米粒子排出而使涂层表面恢复超疏水性，从而实现了超疏水自修复的目的，大大提升了涂料的工程耐久性。上述超疏水自修复的工艺仅通过提升环境湿度即可实现，工艺更为简单易实现，也保证了该超疏水自修复涂料能够应用于混凝土等更多严苛环境的领域。
Super-hydrophobic self-repairing coating as well as preparation method and application thereof
The invention belongs to the technical field of building coatings, and particularly discloses a super-hydrophobic self-repairing coating and a preparation method thereof. According to the super-hydrophobic self-repairing coating, a polyurethane prepolymer is used as a coating matrix, and fluoroalkyl silane modified nanoparticles dispersed in the polyurethane prepolymer are utilized to form a super-hydrophobic coating, so that the super-hydrophobic and anti-pollution effects are achieved; meanwhile, by means of hydrophilic chain segment substances linked to a coating substrate, after the hydrophobicity of the surface of the coating is reduced, the repulsive interaction between the hydrophilic chain segment substances in the coating and the fluorosilane modified nano particles can be enhanced by controlling the humidity in the environment, so that the fluorosilane modified nano particles are discharged, and the super-hydrophobicity of the surface of the coating is recovered; therefore, the purpose of super-hydrophobic self-repairing is achieved, and the engineering durability of the coating is greatly improved. The super-hydrophobic self-repairing process can be achieved only by increasing the environment humidity, the process is simpler and easier to achieve, and it is also guaranteed that the super-hydrophobic self-repairing coating can be applied to the field of more severe environments such as concrete.
本发明属于建筑涂料技术领域，尤其公开了一种超疏水自修复涂料及其制备方法。该超疏水自修复涂料以聚氨酯预聚体为涂料基体，利用分散于其中的氟硅烷改性纳米粒子，形成具有超疏水性的涂层，达到超疏水和抗污的效果；同时利用链接在涂料基体上的亲水链段物，当涂层表面的疏水性降低后，通过对环境中湿度的控制，即可增强涂层中亲水链段物与氟硅烷改性纳米粒子之间的排斥作用，从而将氟硅烷改性纳米粒子排出而使涂层表面恢复超疏水性，从而实现了超疏水自修复的目的，大大提升了涂料的工程耐久性。上述超疏水自修复的工艺仅通过提升环境湿度即可实现，工艺更为简单易实现，也保证了该超疏水自修复涂料能够应用于混凝土等更多严苛环境的领域。
Super-hydrophobic self-repairing coating as well as preparation method and application thereof
一种超疏水自修复涂料及其制备方法和应用
HOU PINGPING (author) / SUN DEWEN (author) / MA YINGJIE (author) / LI BO (author) / RAN QIANPING (author) / LIU JIAPING (author)
2022-06-24
Patent
Electronic Resource
Chinese
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