Enhanced water flux and bacterial resistance in cellulose acetate membranes with quaternary ammoniumpropylated polysilsesquioxane

Ravi P. Pandey, Parashuram Kallem, P. Abdul Rasheed, Khaled A. Mahmoud, Fawzi Banat, Woei Jye Lau, Shadi W. Hasan

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

An enhanced water flux and anti-fouling nanocomposite ultrafiltration membrane based on quaternary ammoniumpropylated polysilsesquioxane (QAPS)/cellulose acetate (QAPS@CA) was fabricated by in situ sol-gel processing via phase inversion followed by quaternization with methyl iodide (CH3I). Membrane characterizations were performed based on the contact angle, FTIR, SEM, and TGA properties. Membrane separation performance was assessed in terms of pure water flux, rejection, and fouling resistance. The 7%QAPS@CA nanocomposite membrane showed an increased wettability (46.6° water contact angle), water uptake (113%) and a high pure water permeability of ∼370 L m−2 h−1 bar−1. Furthermore, the 7%QAPS@CA nanocomposite membrane exhibited excellent bactericidal properties (∼97.5% growth inhibition) against Escherichia coli (E. coli) compared to the bare CA membrane (0% growth inhibition). The 7%QAPS@CA nanocomposite membrane can be recommended for water treatment and biomedical applications.

Original languageBritish English
Article number133144
JournalChemosphere
Volume289
DOIs
StatePublished - Feb 2022

Keywords

  • Cellulose acetate
  • Mixed matrix
  • Nanocomposite
  • Polysilsesquioxane
  • Ultrafiltration
  • Water treatment

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