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X-Ray diffraction study of polyethersulfone polymer, flat-sheet and hollow fibers prepared from the same under different gas-gaps

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Khayet Souhaimi, Mohamed and García Payo, María del Carmen (2009) X-Ray diffraction study of polyethersulfone polymer, flat-sheet and hollow fibers prepared from the same under different gas-gaps. Desalination, 245 (01-mar). pp. 494-500. ISSN 0011-9164

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Official URL: http://dx.doi.org/10.1016/j.desal.2009.02.013


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Abstract

Polyethersulfone (PES) hollow fiber membranes were prepared by both wet spinning technique, without gas-gap, and dry/wet spinning technique under different gas-gaps, namely, air, oxygen, nitrogen, carbon dioxide, argon and humid air. All spinning parameters were maintained the same except the type of the gas-gap used. Flat-sheets were prepared by the phase-inversion method using the same polymer solution and water as coagulant. The X-ray diffraction pattern of virgin PES indicated that this polymer is mainly amorphous in nature and X-ray diffraction study revealed quite similar structure for flat-sheets and hollow fibers prepared from the PES polymer. It was observed that the PES hollow fibers prepared with dry/wet spinning technique exhibited some differences in X-ray diffraction spectra showing attenuation of the broad band peak intensity for the hollow fibers prepared under argon and carbon dioxide. The intersegmental distance of polymer chains, d-space, was determined. A value of about 4.77 +/- 0.05 angstrom was obtained. The results provide evidence that the spinning technique do not induce crystallization of hollow fibers.


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Engineering with Membranes Conference (2008. Vale do Lobo, Algarve, Portugal). © 2009 Elsevier B.V. The authors gratefully thank the financial support of Spanish Ministry of Science and Education (MEC) (Project No. FIS2006-05323). The authors also express their gratitude to Dr. J. Velázquez Cano (X-Ray Diffraction Centre, UCM) for taking the X-ray diffraction spectra.

Uncontrolled Keywords:Induced phase-separation; Morphology; Membranes; Performance
Subjects:Sciences > Physics > Thermodynamics
ID Code:26371
Deposited On:25 Aug 2014 12:48
Last Modified:05 Nov 2015 14:14

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