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Applied Surface Science-Exploring the synergetic effects of graphene oxide (GO) and polyvinylpyrrodione (PVP) on poly(vinylylidenefluoride) (PVDF) ultrafiltration membrane performance
作者:Xiaojing Chang , Zhenxing Wanga , Shuai Quana , Yanchao Xu , Zaixing Jiang,Lu Shao
关键字:GO , membrane
论文来源:期刊
具体来源:Applied Surface Science
发表时间: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.

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