TITLE:
Modification Effect of Nano-Graphene Oxide on Properties and Structure of Polysulfone Ultrafiltration Membrane
AUTHORS:
Hao Yuan, Lahua Jin, Dan Luo, Chen Ge
KEYWORDS:
Nano-Graphene Oxide, Ultrafiltration Membrane, Polysulfone, Water Purification
JOURNAL NAME:
Journal of Environmental Protection,
Vol.9 No.11,
October
29,
2018
ABSTRACT: In
order to improve the purification properties of polysulfone (PSF)
ultrafiltration membranes (UFM), nano-graphene oxide (nano-GO) was taken as
modifier, and the physical blending process was adopted in our experiment. The
microstructure, surface morphology and functional groups of modified UFM have
been characterized respectively by scanning electron microscopy, atomic force
microscopy and Fourier transform infrared spectroscopy, and the static contact
angle between the membrane surface and the water droplet has also been detected
to show the change of its hydrophilicity. Through experiments, it has been
found that modified UFM has larger and more developed finger micro-pores, and
there exist a large number of -OH
groups on its surface, and also its hydrophilicity has been enhanced. The
result of the experiments show that the modified UFM may keep rejection above
97% and its water flux can be reached at about 219.1 L/(m2·h) under
pressure of 1 bar if 0.4 wt% of nano-GO was added. Additionally, the nano-GO
can increase the flux recovery radio (FRR) of the membranes, and the maximum
FRR was observed as 74.4% if 0.3 wt% of nano-GO was appended.