In this paper, the superhydrophobic poly(vinylidene fluoride)/fluorinated ethylene propylene/SiO₂/CNTs-EDTA (PFSC-EDTA) composite coating was successfully fabricated and applied for anti-scaling performance. The deposition of CaCO₃ on the surface of the superhydrophobic PFSC-EDTA composite coating reached 0.0444 mg/cm² for 192-h immersion into the supersaturated CaCO₃ solution, which was only 11.4% that of the superhydrophobic PFSC composite coating. At the interface between the CaCO₃ solution and the PFSC-EDTA coating, the Ca²⁺ could be firstly chelated by EDTA that was benefit for improving the anti-scaling performance of the superhydrophobic PFSC-EDTA composite coating. In another hand, the addition of EDTA to the CNTs played an important role in fabricating the SiO₂-centric and CNTs-EDTA-surrounded multilevel micro–nanostructure in the superhydrophobic PFSC-EDTA composite coating, in favor of maintaining the air film under the water and the stability of the superhydrophobic surface. The research supplies a new way of improving anti-scaling performance of superhydrophobic coating by incorporating the organic chelating agent at the interface and changing the traditional way of scale prevention.

本文成功地制备了超疏水聚偏二氟乙烯/氟化乙烯丙烯/ SiO ₂ / CNTs-EDTA（PFSC-EDTA）复合涂料，并用于防垢性能。CaCO ₃在超疏水性PFSC-EDTA复合涂层表面的沉积时间为192 h，浸入过饱和的CaCO ₃溶液中达到0.0444 mg / cm ²，仅为超疏水性PFSC复合涂层的11.4％。在CaCO ₃溶液和PFSC-EDTA涂层之间的界面处，Ca ²⁺乙二胺四乙酸首先被EDTA螯合，有利于改善超疏水PFSC-EDTA复合涂层的防垢性能。另一方面，在CNT中添加EDTA在制造超疏水PFSC-EDTA复合涂层中以SiO _2为中心和CNTs-EDTA包围的多层微纳米结构中起着重要作用，有利于将空气膜保持在水和超疏水表面的稳定性。该研究提供了一种通过在界面处加入有机螯合剂并改变传统的防垢方法来提高超疏水性涂料防垢性能的新方法。