【目的】提升混凝土结构在恶劣环境下的抗氯离子性能，延长其服役寿命。【方法】以甲基丙烯酸甲酯（ MMA）和丙烯酸乙酯（ EA）为基础单体，引入乙烯基三甲氧基硅烷（ VTMS）和全氟辛基乙基甲基丙烯酸酯（TEMAc-8）进行氟硅协同改性，通过正交试验设计优化单体配比，系统分析各组分对涂层疏水性、附着力及结构特征的影响，并将制备的涂层应用于水泥砂浆表面，评估其抗氯离子渗透性能。【结果】改性涂层水接触角最高可达 110. 6°，附着力最高为 3. 42 MPa，涂覆涂层后的砂浆试样中氯离子渗透量相比未涂覆试样降低 70%。【结论】硅氟协同改性改善了丙烯酸涂层的疏水性和界面结合能力，形成了兼具表面阻水作用与界面化学结合的防护体系。该涂层能够有效降低氯离子向水泥基材料内部的迁移速率，为延缓氯盐环境下混凝土劣化提供了一种可行的表面防护思路。

［Objective］ To improve the chloride ion resistance of concrete structures in harshenvironments and extend their service life.［Methods］Using methyl methacrylate（MMA）and ethyl acrylate（EA）as base monomers，vinyltrimethoxysilane（VTMS）and perfluorooctyl ethyl methacrylate（TEMAc-8） were introduced for synergistic fluorosilicon modification. The monomer ratio was optimized through orthogonal experimental design，and the effects of each component on hydrophobicity，adhesion and structural characteristics of the coating were systematically analyzed. Theprepared coatings were applied to cement mortar surfaces to evaluate their chloride ion penetrationresistance.［Results］The maximum water contact angle of the modified coating reached 110. 6°，with the highest adhesion strength of 3. 42 MPa. The chloride ion penetration in coated mortar specimenswas reduced by 70% compared to uncoated samples.［Conclusion］ The synergistic fluorosilicon modification improved the hydrophobicity and interfacial bonding ability of the acrylic coating，forminga protective system combining surface water resistance and interfacial chemical bonding. This coatingcan effectively reduce the migration rate of chloride ions into cement-based materials，providing afeasible surface protection strategy for delaying concrete deterioration in chloride environments.