Study on Preparation and Antiscaling Performance of PVDF/FEP/ZnO Composite Coatings

For solving the scaling problem on the metal surface, by using polyvinylidene fluoride (PVDF) and polyperfluoroethylene propylene (FEP) as raw materials, the PVDF/FEP/ZnO composite coatings were prepared by adding different content of nano ZnO into PVDF and FEP. The effects of nano ZnO content on the hydrophobicity and antiscaling performance of the composite coatings were studied. In addition, contact angle measurement, scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) were employed to characterize composite coatings systematically. Results showed that when the amount of nano ZnO was 5%(mass fracrion), the surface free energy of PVDF/FEP/ZnO composite coating was 8.6 mJ/m2, and the water contact angle (WCA) was 114.8°. After scaling in supersaturated calcium carbonate solution for 336 h, the scaling amount of CaCO3 on the surface of PVDF/FEP/ZnO composite coating was 72% of that of the epoxy coating, and the mole fraction of aragonite and aragonite reached 91.4%. In general, the PVDF/FEP/