Co-solvent-mediated synthesis of thin polyamide membranes

Chunlong Kong, Takuji Shintani, Takashi Kamada, Viatcheslav Freger, Toshinori Tsuru

Research output: Contribution to journalArticlepeer-review

119 Scopus citations

Abstract

This study introduces a promising strategy, called co-solvent assisted interfacial polymerization (CAIP), for the synthesis of thin polyamide membranes by interfacial polymerization of 1,3-phenylenediamine (MPD) with 1,3,5-benzenetricarbonyl trichloride (TMC) on polysulfone ultrafiltration supports. A synergistic co-solvent added in the hexane phase was used to control the polymerization reaction zone and modify the membrane network structure. The resultant membrane exhibited selective molecular sieving of small molecules from larger ones. The addition of larger amounts of acetone as a co-solvent to the hexane solution increased both pore size and water flux, which was determined by analysis of the membrane permeation properties. In the permselectivity test of a 500ppm glucose aqueous solution, the best-performing membrane was prepared by 2wt% acetone addition. It showed a rejection of more than 99.4% and a high water transport at a rate of more than 1×10-11m3/(m2Pas), which was more than 4-fold higher than the membrane prepared without acetone. The effects of reaction conditions, including co-solvent content and interfacial polymerization time, were studied.

Original languageEnglish
Pages (from-to)10-16
Number of pages7
JournalJournal of Membrane Science
Volume384
Issue number1-2
DOIs
StatePublished - 15 Nov 2011

Keywords

  • Co-solvent
  • Interfacial polymerization
  • Nanofiltration
  • Polyamide
  • Reverse osmosis

ASJC Scopus subject areas

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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