Yuan Rui, Tang Zhixing, Xiao Mindi, Cai Minzhao, Yuan Xin, Gu Lin
School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China.
Guangdong Pearl River Chemical Industry Coatings Co., Ltd., Zhuhai 519050, China.
Nanomaterials (Basel). 2025 Aug 16;15(16):1266. doi: 10.3390/nano15161266.
Mica is a naturally layered material recognized for its superior insulation and exceptional barrier properties; however, it is prone to agglomeration, and its compatibility with resin remains to be resolved. In this work, phosphate butynediol ethoxylate (PBEO), synthesized by the reaction of a commercial corrosion inhibitor, butynediol ethoxylate, with phosphorus pentoxide, was employed to modify mica nanosheets (MNs), as evidenced by FTIR, Raman, and XPS. The obtained MN@PBEO demonstrated improved water dispersibility and enhanced compatibility with acrylic latex. EIS measurements revealed that the impedance (|Z|) for the waterborne acrylic coating with 0.5 wt% MN@PBEO was approximately an order of magnitude greater than that of the pure waterborne acrylic coating after 28 days of immersion in a 3.5 wt% NaCl solution. Additionally, compared to the pure waterborne acrylic coating, the 0.5 wt% MN@PBEO/acrylic nanocomposite coating on Q235 carbon steel exhibited a water diffusion coefficient that was roughly ten times lower, demonstrating substantially enhanced corrosion protection, attributable to its superior barrier properties.
云母是一种天然层状材料，以其优异的绝缘性能和出色的阻隔性能而闻名；然而，它容易团聚，并且其与树脂的相容性仍有待解决。在这项工作中，通过商业缓蚀剂丁炔二醇乙氧基化物与五氧化二磷反应合成的磷酸丁炔二醇乙氧基化物（PBEO）被用于改性云母纳米片（MNs），傅里叶变换红外光谱（FTIR）、拉曼光谱和X射线光电子能谱（XPS）证明了这一点。所获得的MN@PBEO表现出改善的水分散性和与丙烯酸乳胶增强的相容性。电化学阻抗谱（EIS）测量表明，在3.5 wt% NaCl溶液中浸泡28天后，含有0.5 wt% MN@PBEO的水性丙烯酸涂料的阻抗（|Z|）比纯水性丙烯酸涂料大约高一个数量级。此外，与纯水基丙烯酸涂料相比，Q235碳钢上的0.5 wt% MN@PBEO/丙烯酸纳米复合涂料的水扩散系数大约低十倍，这表明其腐蚀防护性能显著增强，这归因于其优异的阻隔性能。
