Li Hongfeng, Lin Xiangwen, Wang Hongguang
School of Civil Engineering, Northeast Forestry University, Harbin 150040, China.
Materials (Basel). 2021 Jan 4;14(1):211. doi: 10.3390/ma14010211.
In order to address water damage of asphalt pavement, reduce the occurrence of water-related potholes, deformation, and other diseases, and improve the performance and service life of the pavement, a nano-TiO superhydrophobic coating (PSC) on asphalt pavement was prepared from waterborne polyurethane and nano-TiO modified by stearic acid. FT-IR measured stearic acid successfully modified low surface energy substance on the surface of nano-TiO. The SEM image shows that the PSC has a rough surface structure. The contact angle and rolling angle of the PSC in the contact angle test are 153.5° and 4.7°, respectively. PSC has a super-hydrophobic ability, which can improve the water stability of the asphalt mixture. Although the texture depth and pendulum value have been reduced by 2.5% and 4.4%, respectively, they all comply with the standard requirements. After the abrasion resistance test, the PSC coating still has a certain hydrophobic ability. These results surface PSC coating can effectively reduce water damage on asphalt pavement, and has considerable application value.
为解决沥青路面水损害问题，减少与水相关的坑洼、变形等病害的发生，提高路面性能和使用寿命，采用水性聚氨酯和经硬脂酸改性的纳米TiO制备了沥青路面纳米TiO超疏水涂层（PSC）。傅里叶变换红外光谱（FT-IR）测定表明硬脂酸成功改性了纳米TiO表面的低表面能物质。扫描电子显微镜（SEM）图像显示PSC具有粗糙的表面结构。在接触角测试中，PSC的接触角和滚动角分别为153.5°和4.7°。PSC具有超疏水能力，可提高沥青混合料的水稳定性。虽然纹理深度和摆值分别降低了2.5%和4.4%，但均符合标准要求。经过耐磨性测试后，PSC涂层仍具有一定的疏水能力。这些结果表明PSC涂层能有效减少沥青路面的水损害，具有可观的应用价值。
