Water filtration membranes based on non-woven cellulose fabrics: Effect of nanopolysaccharide coatings on selective particle rejection, antifouling, and antibacterial properties

Blanca Jalvo, Andrea Aguilar-Sanchez, Maria Ximena Ruiz Caldas, Aji P. Matthew

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

This article presents a comparative study of the surface characteristics and water purification performance of commercially available cellulose nonwoven fabrics modified, via cast coating, with different nano-dimensioned bio-based carbohydrate polymers, viz. cellulose nanocrystals (CNC), TEMPO-oxidized cellulose nanofibers (T-CNF), and chitin nanocrystals (ChNC). The surface-modified nonwoven fabrics showed an improvement in wettability, surface charge modification, and a slight decrease of maximum pore size. The modification improved the water permeance in most of the cases, enhanced the particle separation performance in a wide range of sizes, upgraded the mechanical properties in dry conditions, and showed abiotic antifouling capability against proteins. In addition, T-CNF and ChNC coatings proved to be harmful to the bacteria colonizing on the membranes. This simple surface impregnation approach based on green nanotechnology resulted in highly efficient and fully bio-based high-flux water filtration membranes based on commercially available nonwoven fabrics, with distinct performance for particle rejection, antifouling and antibacterial properties.
Original languageEnglish
Article number1752
JournalNanomaterials
Volume11
Issue number7
DOIs
Publication statusPublished - 5 Jul 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • non-woven
  • cellulose nanocrystals
  • chitin nanocrystals
  • TEMPO-oxidized cellulose nanofibers
  • rejection
  • antifouling
  • antibacterial
  • membrane
  • coating
  • Antifouling
  • Antibacterial
  • Rejection
  • Non-woven
  • Cellulose nanocrystals
  • Membrane
  • Coating
  • Chitin nanocrystals

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