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Graphene oxide quantum dots embedded polysulfone membranes with enhanced hydrophilicity, permeability and antifouling performance

  • Guoke Zhao (赵国珂)
  • Ruirui Hu (胡蕊蕊)
  • Jing Li (李晶)
  • Hongwei Zhu (朱宏伟)Email author
Articles
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Abstract

Graphene oxide (GO) has been demonstrated to be an effective hydrophilic nanofiller to modify the polymeric membranes when forming a mixed matrix structure. GO quantum dots (QDs) are promising candidates to fully exert the rich oxygen containing functional groups due to their unique size induced edge effects. In this work, GO QDs modified polysulfone (PSF) ultrafiltration (UF) membranes were prepared by phase inversion method with various GO QDs loadings (0.1–0.5 wt.%). A proper amount of GO QDs addition led to a more porous and hydrophilic membrane structure. With 0.3 wt.% GO QDs, the membranes showed a 60% increase in permeability (130.54 vs. 82.52 LMH bar−1). The pristine PSF membranes had a complete cutoff of bovine serum albumin molecules and it was well maintained with GO QDs incorporated. The membranes with 0.5 wt.% GO QDs exhibited the highest flux recovery ratio of 89.7% and the lowest irreversible fouling of 10.3% (54.5% and 33.3% for the pristine PSF membranes). Our results proved that GO QDs can function as effective nanofillers to enhance the hydrophilicity, permeability and antifouling performance of PSF UF membranes.

Keywords

graphene oxide quantum dots ultrafiltration membrane antifouling 

氧化石墨烯量子点改性聚砜超滤膜及其亲水性、水通量和抗污染性能研究

摘要

氧化石墨烯(GO)是一种有效的对高分子膜进行添加改性的亲 水性纳米材料, 氧化石墨烯量子点(GO QDs)在保持GO结构的同时, 其小尺寸所致的边缘效应, 使其具有更加丰富的含氧官能团. 本文采 用相转化法制备了GO QDs改性的聚砜超滤膜, 合适添加量的GO QDs提高了复合膜的孔隙率和亲水性. 当GO QDs添加量为0.3 wt.% 时, 复合膜的水通量提高了60%(130.54 vs. 82.52 LMH bar−1), 并实 现了对牛血清白蛋白分子的完全截留. 在抗污染测试中, GO QDs 添加量为0.5 wt.%的复合膜具有最高的通量回复率(89.7%)和最低 的不可逆污染率(10.3%). 该研究表明GO QDs作为添加改性材料, 可有效提高聚砜超滤膜的亲水性、水通量和抗污染性能.

Notes

Acknowledgements

This work was supported by Beijing Natural Science Foundation (2172027).

Supplementary material

40843_2019_9417_MOESM1_ESM.pdf (357 kb)
Supplementary material, approximately 228 KB.

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Guoke Zhao (赵国珂)
    • 1
  • Ruirui Hu (胡蕊蕊)
    • 1
  • Jing Li (李晶)
    • 1
  • Hongwei Zhu (朱宏伟)
    • 1
    Email author
  1. 1.State Key Lab of New Ceramics and Fine Processing, School of Materials Science and EngineeringTsinghua UniversityBeijingChina

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