Effect of electron beam irradiation on morphology and sieving characteristics of nylon-66 membranes

Amilia Linggawati, Abdul Wahab Mohammad, Zulkafli Ghazali

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Nylon-66 is a typical semicrystalline polymer that can be crosslinked through electron beam (EB) irradiation. Crosslinking can dramatically change polymer properties. The objective of this research was to observe how EB irradiation affects morphology and sieving characteristics of nylon-66 membranes. EB irradiation was carried out in air at 60, 70 and 80 kGy doses. Scanning electron microscopy (SEM), swelling and gel content studies evidenced the morphological changes and crosslinking of nylon-66 membranes. Sieving characteristics were also measured using pure water permeation, and rejection of raffinose, vitamin B12, and mono- and divalent salts. These results show that nylon-66 membrane surface and permeation characteristics changed with different irradiation doses. The nylon-66 surface became denser and the gel content increased with increasing irradiation dose. Furthermore, pure water permeation decreased and small molecules were increasingly rejected with greater irradiation doses. The amount of rejection was between 33% and 88.4% for vitamin B12 and between 16% and 83% for raffinose. The highest vitamin B12 and raffinose rejection was seen with a N-80 membrane, and no rejection was measured with N-0 or N-60 membranes. Salt rejection, however, was very low, especially for NaCl, with only 10.51-46% rejected. Based on flux, permeability and uncharged solute (vitamin B12 and raffinose) rejection data, nylon-66 type N-70 and N-80 membranes were estimated to be in the nanofiltration (NF) range.

Original languageEnglish
Pages (from-to)2797-2804
Number of pages8
JournalEuropean Polymer Journal
Volume45
Issue number10
DOIs
Publication statusPublished - Oct 2009

Fingerprint

Nylon (trademark)
Nylons
rejection
Raffinose
vitamins
Electron beams
Vitamins
Irradiation
electron beams
Vitamin B 12
membranes
Membranes
irradiation
Permeation
Dosimetry
dosage
crosslinking
Crosslinking
Polymers
Gels

Keywords

  • Crosslinking
  • Electron beam
  • Nanofiltration
  • Nylon-66
  • Sieving characteristics

ASJC Scopus subject areas

  • Polymers and Plastics
  • Physics and Astronomy(all)
  • Organic Chemistry

Cite this

Effect of electron beam irradiation on morphology and sieving characteristics of nylon-66 membranes. / Linggawati, Amilia; Mohammad, Abdul Wahab; Ghazali, Zulkafli.

In: European Polymer Journal, Vol. 45, No. 10, 10.2009, p. 2797-2804.

Research output: Contribution to journalArticle

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abstract = "Nylon-66 is a typical semicrystalline polymer that can be crosslinked through electron beam (EB) irradiation. Crosslinking can dramatically change polymer properties. The objective of this research was to observe how EB irradiation affects morphology and sieving characteristics of nylon-66 membranes. EB irradiation was carried out in air at 60, 70 and 80 kGy doses. Scanning electron microscopy (SEM), swelling and gel content studies evidenced the morphological changes and crosslinking of nylon-66 membranes. Sieving characteristics were also measured using pure water permeation, and rejection of raffinose, vitamin B12, and mono- and divalent salts. These results show that nylon-66 membrane surface and permeation characteristics changed with different irradiation doses. The nylon-66 surface became denser and the gel content increased with increasing irradiation dose. Furthermore, pure water permeation decreased and small molecules were increasingly rejected with greater irradiation doses. The amount of rejection was between 33{\%} and 88.4{\%} for vitamin B12 and between 16{\%} and 83{\%} for raffinose. The highest vitamin B12 and raffinose rejection was seen with a N-80 membrane, and no rejection was measured with N-0 or N-60 membranes. Salt rejection, however, was very low, especially for NaCl, with only 10.51-46{\%} rejected. Based on flux, permeability and uncharged solute (vitamin B12 and raffinose) rejection data, nylon-66 type N-70 and N-80 membranes were estimated to be in the nanofiltration (NF) range.",
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