EDTA interfacial chelation Ca2+incorporates superhydrophobic coating for scaling inhibition of CaCO3 in petroleum industry

• 作者: Ming-Liang Zhu Hui-Juan Qian Rui-Xia Yuan Dong-Yan Zhao Hai-Chao Huang Huai-Yuan Wang
• 来源期刊: 石油科学（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: PETROCHEMISTRY & CHEMICAL ENGINEERING
• 页码范围: 951-961
• 页数: 11页
• 语种: 英文

摘要

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.