Core-shell polymer coating is a significant means of improving the surface protection of cement-based materials. In this paper, a novel strategy for the paraffin-doped polystyrene acrylate-polysiloxane core-shell emulsions (CSP) are proposed by combining polyaddition and polycondensation reactions, integrating the superior corrosion-resistance of PSA emulsions with the high-hydrophobicity of siloxane emulsions. The CSP emulsions have excellent physical stability and rheological behavior, with a lower proportion of unsaturated bonds and lower content of chemically bound water. The core-shell structure promotes the formation of Si–O bonds between the polymer molecules and the cement matrix, and more conducive to the formation of new silicate crystals on the cement hydrate surface. Macroscopically, the surface energy of the cement samples treated with CSP coating is below 16.7 mJ/m², while its superficial nanoscale papillae give a water contact angle of almost 140°. The capillary absorption coefficient of the Portland concrete treated with CSP coating can be decreased to only 2.09 g/(m²·h^0.5). Meanwhile, the corrosion rate of Cl⁻ and SO₄²⁻ on the cementitious materials are significantly inhibited by the CSP membrane, reducing the levels of Friedel's salt, ettringite and gypsum generated by ionic corrosion, respectively. Furthermore, the CSP membranes have excellent molecular structural integrity and high cross-linkage under acid/alkaline corrosion and photo-thermal aging, maintaining superior adhesion and corrosion resistance with the cement substrate.

核壳聚合物涂层是提高水泥基材料表面保护的重要手段。本文通过结合加聚和缩聚反应，提出了一种新型的石蜡掺杂聚苯乙烯丙烯酸酯-聚硅氧烷核壳乳液（CSP）策略，将PSA乳液的优异耐腐蚀性与硅氧烷乳液的高疏水性相结合。CSP乳液具有优异的物理稳定性和流变行为，具有较低比例的不饱和键和较低的化学结合水含量。核壳结构促进聚合物分子之间形成Si-O键和水泥基体，更有利于在水泥水合物表面形成新的硅酸盐晶体。宏观上，经 CSP 涂层处理的水泥样品的表面能低于 16.7 mJ/m ²，而其表面纳米级乳突的水接触角接近 140°。经CSP涂层处理的波特兰混凝土的毛细吸收系数可降低至仅2.09 g/(m²·h^0.5)。同时，CSP膜显着抑制了Cl^-和SO₄^2-对胶凝材料的腐蚀速率，降低了Friedel盐的含量，分别由离子腐蚀生成钙矾石和石膏。此外，CSP膜在酸/碱腐蚀和光热老化下具有优异的分子结构完整性和高交联性，与水泥基材保持优异的附着力和耐腐蚀性。