Regulating the transmission of chloride medium in concrete is the primary research work to improve the durability and sustainability of concrete, effectively saving offshore buildings' maintenance costs. Inspired by the molecular design of drug delivery, this study designed an erosive solution-responsive ion transport inhibitors (ITI) to restrain the transport of erosive solution in calcium silicate hydrates (C–S–H) gel pores, which is expected to reduce the water absorption and chloride diffusion coefficient of concrete efficiently. In this investigation, molecular dynamics was applied to reveal the mechanism of ITI with different main-chain structures on the atomic scale, and an evaluation system of such polymers was proposed. When the main chain is the carboxylic group, the ITI is similar to the hinge of the door. Once the corrosion solution invades the gel channel, the hydrophobic group will be perpendicular to the surface of calcium silicate hydrates to prevent the transmission of the solution. However, when the main chain is alcohol amine, the ITI can gather at the front of the erosion solution to form a water plugging medium and complex with the eroded ions to inhibit the diffusion of ions. On this basis, the optimal ITI is evaluated through water adsorption and chloride ion diffusion tests and further applied in offshore engineering. The results show that they can effectively alleviate chloride ion erosion without sacrificing mechanical properties.

调节混凝土中氯化物介质的传输是提高混凝土耐久性和可持续性的首要研究工作，有效节约海上建筑的维护成本。受药物传递分子设计的启发，本研究设计了一种侵蚀溶液响应的离子迁移抑制剂（ITI）来抑制侵蚀溶液在水合硅酸钙（C-S-H）凝胶孔中的迁移，有望减少吸水率和氯化物扩散系数混凝土有效。在这项研究中，应用分子动力学在原子尺度上揭示了具有不同主链结构的 ITI 的机理，并提出了该聚合物的评价体系。当主链为羧基时，ITI类似于门的铰链。一旦腐蚀溶液侵入凝胶通道，疏水基团将垂直于硅酸钙水合物的表面，阻止溶液的传输。但当主链为醇胺时，ITI可以聚集在侵蚀溶液的前端形成堵水介质，与被侵蚀的离子络合，抑制离子的扩散。在此基础上，通过吸水和氯离子扩散试验评价最佳ITI，并进一步应用于海洋工程。结果表明，它们可以在不牺牲机械性能的情况下有效缓解氯离子侵蚀。