Controlling swelling behavior of poly (vinyl) alcohol via networked cellulose and its application as a reverse osmosis membrane

Shaheen Fatima Anis, Boor Singh Lalia, Raed Hashaikeh

Research output: Contribution to journalArticle

Abstract

The hydrophilic nature of polyvinyl alcohol (PVA) makes it a promising membrane material for water treatment applications but its use is restricted by its high swelling capacity in water. We found that the swelling behavior of PVA can be controlled via aqueous blending of PVA with a modified form of cellulose-networked cellulose (NC). Dense PVA-NC membranes were obtained by varying NC concentration at 3, 10, 15, 20 and 30wt.%. Fabricated membranes were characterized for their mechanical, thermal and structural properties. It was found that 15wt.% of NC was optimum. The swelling capacity of PVA was reduced from 340% to 150%. The tensile strength of wet PVA improved 1520% and the elastic modulus improved 1400%. The fabricated membranes were tested for desalination by reverse osmosis (RO) using aqueous solution of sodium chloride with 25,000ppm feed concentration and an applied pressure of 24bars. A 272μm thick membrane allowed a water flux value of 1.2l/h·m2 with a salt rejection of 98.8%.

Original languageEnglish (US)
Pages (from-to)138-145
Number of pages8
JournalDesalination
Volume336
Issue number1
DOIs
StatePublished - Mar 3 2014

Keywords

  • Membranes
  • Networked cellulose
  • Polyvinyl alcohol
  • Reverse osmosis
  • Swelling

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Controlling swelling behavior of poly (vinyl) alcohol via networked cellulose and its application as a reverse osmosis membrane'. Together they form a unique fingerprint.

  • Cite this