Amouamouha Maryam, Badalians Gholikandi Gagik
Faculty of Civil, Water and Environmental Engineering, A.C., Shahid Beheshti University, Tehran 1658953571, Iran.
Membranes (Basel). 2017 Nov 12;7(4):64. doi: 10.3390/membranes7040064.
Biofouling is one of the drawbacks restricting the industrial applications of membranes. In this study, different thicknesses of silver nanoparticles with proper adhesion were deposited on poly(vinylidenefluoride) (PVDF) and polyethersulfone (PES) surfaces by physical vapor deposition (PVD). The crystalline and structural properties of modified and pure membranes were investigated by carrying out X-ray diffraction (XRD) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Scanning electron microscope (SEM) and atomic force microscopy (AFM) analyses were employed to examine the surface morphology and the bacteria anti-adhesion property of the membranes. The morphology measurements confirmed that even though after silver grafting the surface became more hydrophobic, the homogeneity increased and the flux reduction decreased after coating. Moreover a comparison between PVDF and PES revealed that CFU (colony forming units) reduced 64.5% on PVDF surface and 31.1% on PES surface after modification. In conclusion, PVD improved the performance of the membrane antibiofouling, and it is more promising to be used for PVDF rather than PES.
生物污染是限制膜工业应用的缺点之一。在本研究中，通过物理气相沉积（PVD）将具有适当附着力的不同厚度的银纳米颗粒沉积在聚偏氟乙烯（PVDF）和聚醚砜（PES）表面。通过进行X射线衍射（XRD）和衰减全反射傅里叶变换红外光谱（ATR-FTIR）研究了改性膜和纯膜的晶体和结构性质。采用扫描电子显微镜（SEM）和原子力显微镜（AFM）分析来检查膜的表面形态和细菌抗粘附性能。形态测量证实，尽管银接枝后表面变得更疏水，但涂层后均匀性增加且通量降低减少。此外，PVDF和PES之间的比较表明，改性后PVDF表面的CFU（菌落形成单位）减少了64.5%，PES表面减少了31.1%。总之，PVD改善了膜的抗生物污染性能，并且它用于PVDF比用于PES更有前景。
