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Mechanical, swelling and adsorptive properties of dry–wet spun chitosan hollow fibers crosslinked with glutaraldehyde
Reactive and Functional Polymers (2013)
  • Franco Tasselli
  • Abdolreza Mirmohseni, University of Tabriz
  • Mir saeed Seyed Dorraji, University of Tabriz
  • Alberto Figoli
Abstract

Chitosan (CS) hollow fiber (HF) membranes were successfully prepared according to the dry–wet spinning technique. A post-treatment with glutaraldehyde (GA) aqueous solution was carried out to perform the cross-linking reaction. The effect of GA concentration in the range 50–1000 mg l−1 on the swelling, mechanical and adsorptive properties was investigated. The morphology and chemical structure of the fibers were examined by means of SEM and FTIR. The degree of swelling and adsorption capacity decreased as the GA concentration increased. CS hollow fibers swelled the most in acidic solution as compared with distilled water and saline solution. The adsorption capacity of CS HFs increased while decreasing of initial pH from 7.5 to 3.5. Desorption experiments showed that CS HFs were reusable as adsorbent. Mechanical properties were strongly affected by GA post-treatment: tensile strength and elastic modulus increased at low GA concentration (50 mg l−1), to sharply decrease when concentration was ⩾500 mg l−1. Breaking elongation decreased with increasing GA concentration.

Keywords
  • Chitosan; Hollow fiber; Crosslinking; Mechanical and adsorption properties; Swelling
Publication Date
January, 2013
Citation Information
Franco Tasselli, Abdolreza Mirmohseni, Mir saeed Seyed Dorraji and Alberto Figoli. "Mechanical, swelling and adsorptive properties of dry–wet spun chitosan hollow fibers crosslinked with glutaraldehyde" Reactive and Functional Polymers Vol. 73 Iss. 1 (2013)
Available at: http://works.bepress.com/saeed_dorraji/13/