In this study, the effect of graphene oxide (GO) and polyvinylpyrrolidone (PVP) grafted GO (PVP-GO) on the hydrophilicity and antifouling properties of polyvinylidene fluoride (PVDF) was investigated. PVP-GO was synthesized via surface initiated free radical polymerization method. Successful immobilization of PVP on the GO surface was proved by FTIR and XRD analyses. FESEM results of PVP-GO nanosheets showed that immobilization increased interlayer space between nanosheets which resulted in better dispersion of PVP-GO in PVDF membranes. In addition, the presence of GO and PVP-GO nanosheets resulted in membranes with more and bigger finger-like pores and thinner sponge-like layer. Contact angle measurement, abrasion resistance and pure water flux of membranes containing different percentage of GO and PVP-GO ranging from 0 to 2 wt% were investigated. PVDF/GO (1.5 wt%) and PVDF/PVP-GO (1.5 wt%) showed the best hydrophilicity and pure water permeation and therefore, their performance was compared with neat PVDF in MBR system. The results indicated that the presence of GO and PVP-GO improved antifouling properties of PVDF membrane due to their hydrophilicity.

在这项研究中，研究了氧化石墨烯（GO）和聚乙烯吡咯烷酮（PVP）接枝的GO（PVP-GO）对聚偏二氟乙烯（PVDF）的亲水性和防污性能的影响。通过表面引发的自由基聚合法合成了PVP-GO。FTIR和XRD分析证明PVP成功固定在GO表面。PVP-GO纳米片的FESEM结果表明，固定化增加了纳米片之间的层间空间，从而使PVP-GO更好地分散在PVDF膜中。另外，GO和PVP-GO纳米片的存在导致膜具有更多和更大的手指状孔和更薄的海绵状层。研究了GO和PVP-GO含量从0到2 wt％不等的膜的接触角测量，耐磨性和纯净水通量。PVDF / GO（1.5 wt％）和PVDF / PVP-GO（1.5 wt％）表现出最佳的亲水性和纯水渗透性，因此，它们的性能与MBR系统中的纯PVDF相比。结果表明，GO和PVP-GO的存在由于其亲水性而提高了PVDF膜的防污性能。