Effects of APTEOS content and electron beam irradiation on physical and separation properties of hybrid nylon-66 membranes

A. Linggawati, Abdul Wahab Mohammad, C. P. Leo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Nylon-66 contains functional groups which form hydrogen bonds with inorganic silica networks and allow the creation of hybrid membranes. As a typical semicrystalline polymer, nylon-66 can be crosslinked through electron beam (EB) irradiation to form nanofiltration membranes. The effects of γ-aminopropyltriethoxylsilane (APTEOS) and EB irradiation on the physical and separation properties of nylon-66 membranes were studied in this work. Hybrid nylon-66 membranes were prepared by adding an APTEOS solution (5 wt%, 10 wt% and 20 wt%) into nylon-66 which was dissolved in formic acid. Before air drying, membranes were irradiated at 60 kGy, 70 kGy and 80 kGy. More cellular pores were formed in nylon-66 membranes with the addition of APTEOS. However, increased irradiation dose caused the formation of a dense layer in nylon-66 membranes. Crosslinked silica in nylon-66 membranes was confirmed by FT-IR and DMA, while XRD results showed that there was a high degree of crystallinity in some membranes after irradiation. With improvements in membrane pore size and the ratio of membrane thickness to porosity, nylon-66 membrane with 10 wt% of APTEOS irradiated at 70 kGy exhibited satisfactory permeability, excellent removal of neutral solutes and improved rejection of divalent ions.

Original languageEnglish
Pages (from-to)110-117
Number of pages8
JournalMaterials Chemistry and Physics
Volume133
Issue number1
DOIs
Publication statusPublished - 15 Mar 2012

Fingerprint

Nylon (trademark)
Nylons
Electron beams
physical properties
Irradiation
electron beams
membranes
Membranes
irradiation
formic acid
Silicon Dioxide
porosity
Nylon polymers
Silica
Nanofiltration membranes
silicon dioxide
Formic acid
Dynamic mechanical analysis
Functional groups
Dosimetry

Keywords

  • Composite materials
  • Irradiation effects
  • Polymers
  • Thermal properties
  • Transport properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Effects of APTEOS content and electron beam irradiation on physical and separation properties of hybrid nylon-66 membranes. / Linggawati, A.; Mohammad, Abdul Wahab; Leo, C. P.

In: Materials Chemistry and Physics, Vol. 133, No. 1, 15.03.2012, p. 110-117.

Research output: Contribution to journalArticle

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AB - Nylon-66 contains functional groups which form hydrogen bonds with inorganic silica networks and allow the creation of hybrid membranes. As a typical semicrystalline polymer, nylon-66 can be crosslinked through electron beam (EB) irradiation to form nanofiltration membranes. The effects of γ-aminopropyltriethoxylsilane (APTEOS) and EB irradiation on the physical and separation properties of nylon-66 membranes were studied in this work. Hybrid nylon-66 membranes were prepared by adding an APTEOS solution (5 wt%, 10 wt% and 20 wt%) into nylon-66 which was dissolved in formic acid. Before air drying, membranes were irradiated at 60 kGy, 70 kGy and 80 kGy. More cellular pores were formed in nylon-66 membranes with the addition of APTEOS. However, increased irradiation dose caused the formation of a dense layer in nylon-66 membranes. Crosslinked silica in nylon-66 membranes was confirmed by FT-IR and DMA, while XRD results showed that there was a high degree of crystallinity in some membranes after irradiation. With improvements in membrane pore size and the ratio of membrane thickness to porosity, nylon-66 membrane with 10 wt% of APTEOS irradiated at 70 kGy exhibited satisfactory permeability, excellent removal of neutral solutes and improved rejection of divalent ions.

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