Non-covalently functionalized sulfated castor oil-graphene oxide strengthened polyetherimide composite membranes for superior separation of organic pollutants and its fouling mitigation

ACS Applied Materials & Interfaces
Palsamy KanagarajChangkun Liu

Abstract

A novel sulfated castor oil (SCO)-graphene oxide (GO) strengthened polyetherimide (PEI) membrane was prepared for the first time via the phase inversion process for the efficient separation of multiple organic pollutants with superior long-term anti-fouling stability. The X-ray diffraction (XRD), attenuated total reflectance-Fourier transfer infrared (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and mechanical strength studies revealed that the SCO and GO were successfully incorporated into the PEI membrane with enhanced mechanical strength. The water flux of PEI/SCO@GO membrane (410.6 Lm-2 h-1) was about 50 times that of the bare PEI (7.8 Lm-2 h-1) and about 6 times that of the PEI/SCO (64.5 Lm-2h-1) membranes. The surface hydrophilicity of PEI/SCO@GO membrane was significantly increased in terms of the decrease of the water contact angle (WCA) from 98.5° (bare PEI) to 40.4°. The PEI/SCO@GO membrane separation efficiency was found to be greater than 99.0% particularly for both the oil-in-water emulsion and the humic acid (HA) solutions, respectively. Due to the higher flux recovery ratio (FRR) and lower total fouling rate of the PEI/SCO@GO membrane, a comprehensive anti-fouling performa...Continue Reading

References

Apr 4, 2015·ACS Applied Materials & Interfaces·Yi HanChao Gao
Nov 30, 2019·Journal of Hazardous Materials·Xiao-Tong YuanJianxin Li

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