砂浆表面自愈丙烯酸涂层的制备与性能研究

Preparation and Performance Study of Self-Healing Acrylate Coatings on Mortar Surfaces

摘要:

丙烯酸涂层广泛用于混凝土防护,本研究通过正交实验法,研究丙烯酸酯单体配比及功能基团对涂层性能与水泥基材料防护效果的影响.通过傅里叶红外光谱、拉曼光谱、粗糙度、接触角、附着力和抗氯离子渗透等测试,评估不同配方涂层的综合性能.引入脲基可与砂浆表面形成氢键,增强附着力,并赋予涂层自修复能力.在50℃干燥20分钟后,丙烯酸涂层样品划痕完全愈合.接触角最高达106.3°,附着力最大值为4.4 MPa,表明涂层具有良好的疏水性和结合性能. EUM和MMA协同作用使氯离子渗透率降低63.5%.本研究旨在优化配方,为恶劣环境下的水泥基材料防护提供了可持续的解决方案.

Abstract:

Acrylic coatings are widely used for concrete protection. In this study, an orthogonal experimental design was employed to investigate the effects of acrylate monomer ratios and functional groups on coating performance and the protective effect on cement-based materials. The comprehensive properties of coatings with different formulations were evaluated through Fourier Transform Infrared spectroscopy, Raman spectroscopy, surface roughness, contact angle, adhesion, and chloride ion penetration resistance tests. The introduction of urea groups enabled the formation of hydrogen bonds with the mortar surface, enhancing adhesion and imparting self-healing ability to the coating. After drying at 50°C for 20 minutes, scratches on the acrylate coating samples were completely healed. The highest contact angle reached 106.3°, and the maximum adhesion strength was 4.4 MPa, indicating excellent hydrophobicity and bonding performance. The synergistic effect of EUM and MMA reduced chloride ion permeability by 63.5%. This study aims to optimize the formulation and provide a sustainable solution for protecting cement-based materials under harsh environmental conditions.