SCIENCE@home

WS2 deposition on cross-linked polyacrylonitrile with synergistic transformation to yield organic solvent nanofiltration membranes

Hui Min Tham,S. Japip,T. Chung

Published 2019 in Journal of Membrane Science

ABSTRACT

Abstract Using liquid phase exfoliation (LPE) methods established in literature, several different tungsten (IV) disulfide (WS 2 ) dispersions were prepared in solvents ranging from NMP, ethanol/water to pure water via sonication under ambient conditions. These various dispersions were then deposited directly onto cross-linked ultrafiltration-level polyacrylonitrile (PAN) flat sheet membranes through a pressure-assisted filtration process to produce ready-to-use membranes without any additional modifications. To evaluate and compare the performances of the various membranes produced, organic solvent nanofiltration (OSN) was utilized as the testing method while also representing a potential application of these fabricated membranes. After observing and comparing the outcomes of depositing different WS 2 dispersions, deposition of the NMP dispersion was found to yield a promising membrane due to a concurrent synergistic densification effect with positive impacts on membrane performance. Thus, further emphases were placed on studying the use of different initial WS 2 concentrations and longer sonication times in NMP dispersions. After the optimization, the composite membrane consisting of WS 2 on cross-linked PAN substrates shows impressive performance with a high pure ethanol permeance of 43.35 L m −2  h −1 bar −1 , a rejection of 86% towards Remazol Brilliant Blue R (M w  = 626.54 g/mol) and a long-term sustained rejection of 99% towards Evans Blue (M w  = 960.81 g/mol) in ethanol.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Journal of Membrane Science

  • Publication date

    2019-10-15

  • Fields of study

    Materials Science, Chemistry, Engineering, Environmental Science

  • Identifiers
    DOI 10.1016/J.MEMSCI.2019.117219
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-59 of 59 references · Page 1 of 1

CITED BY

Showing 1-25 of 25 citing papers · Page 1 of 1