作者：Xiaojing Chang , Zhenxing Wanga , Shuai Quana , Yanchao Xu , Zaixing Jiang,Lu Shao
關(guān)鍵字：GO , membrane
論文來(lái)源：期刊
具體來(lái)源：Applied Surface Science
發(fā)表時(shí)間：2014年
Membrane surface and cross-sectional morphology created during membrane formation is one of the
most essential factors determining membrane separation performance. However, the complicated interactions between added nanoparticles and additives influencing membrane morphology and performance
during building membrane architectures had been generally neglected. In this study, asymmetric PVDF
composite ultrafiltration (UF) membranes containing graphene oxides (GO) were prepared by using Nmethyl pyrrolidone (NMP) as solvent and polyvinylpyrrodione (PVP) as the pore forming reagent. In the
first time, the effects of mutual interactions between GO and PVP on membranes surface compositions,
morphology and performance were investigated in detail. The variation in chemical properties of different membranes and hydrogen bonds in the membrane containing GO and PVP were confirmed by
X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy-attenuated total
reflectance (FTIR-ATR). Atomic force microscopy (AFM), scanning electron microscopy (SEM), and contact angle (CA) were utilized to clarify the synergetic effects of GO and PVP on morphologies and surface
hydrophilicity of membranes. Besides, water flux, bovine serum albumin (BSA) rejection and attenuate
coefficient were also determined to investigate filtration performance of various membranes. Compared with pure PVDF membrane, the comprehensive performance of PVDF/GO/PVP membrane has been
obviously improved. The surface hydrophilicity and anti-fouling performance were enhanced by the synergistic effects of incorporated GO and PVP. When the PVP content was 0.25 wt.% and the GO content was
0.5 wt.%, the optimized performance can be obtained due to the formation of hydrogen bonds between
GO and PVP.
© 2014 Elsevier B.V. All rights reserved