Exploring the synergetic effects of graphene oxide (GO) and polyvinylpyrrodione (PVP) on poly(vinylylidenefluoride) (PVDF) ultrafiltration membrane performance
Exploring the synergetic effects of graphene oxide (GO) and polyvinylpyrrodione (PVP) on poly(vinylylidenefluoride) (PVDF) ultrafiltration membrane performance
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探索氧化石墨烯（GO）和聚乙烯吡咯二酮（PVP）对聚偏二氟乙烯（PVDF）超滤膜性能的协同效应
DOI：
10.1016/j.apsusc.2014.07.202
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发表时间：
2014-10-15
影响因子：
6.7
通讯作者：
Shao, Lu
中科院分区：
文献类型：
--
作者：
Chang, Xiaojing;Wang, Zhenxing;Shao, Lu
膜形成过程中产生的膜表面和横截面形态是决定膜分离性能的最重要因素之一。然而，在构建膜结构过程中，添加的纳米粒子和添加剂之间复杂的相互作用影响膜的形态和性能，但通常被忽视。本研究以N-甲基吡咯烷酮（NMP）为溶剂，聚乙烯吡咯二酮（PVP）为成孔剂，制备了含氧化石墨烯（GO）的非对称PVDF复合超滤（UF）膜。首次详细研究了GO和PVP之间的相互作用对膜表面组成、形貌和性能的影响。通过X射线光电子能谱（XPS）和傅里叶变换红外光谱-衰减全反射（FTIR-ATR）证实了不同膜的化学性质以及含有GO和PVP的膜中氢键的变化。利用原子力显微镜（AFM）、扫描电子显微镜（SEM）和接触角（CA）阐明GO和PVP对膜形态和表面亲水性的协同效应。此外，还测定了水通量、牛血清白蛋白（BSA）截留率和衰减系数，以研究各种膜的过滤性能。与纯PVDF膜相比，PVDF/GO/PVP膜的综合性能明显提高。 GO和PVP的协同作用增强了表面亲水性和防污性能。当PVP含量为0.25 wt.%且GO含量为0.5 wt.%时，由于GO和PVP之间形成氢键，可以获得优化的性能。 (C) 2014 Elsevier B.V. 保留所有权利。
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 N-methyl 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. (C) 2014 Elsevier B.V. All rights reserved.