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Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties

Jono Suhartono, Chedly Tizaoui Orcid Logo

Separation and Purification Technology, Volume: 154, Pages: 290 - 300

Swansea University Author: Chedly Tizaoui Orcid Logo

Abstract

Pristine (CNTs-P) and oxygen-plasma-functionalised (CNTs-O) multi-walled carbon nanotubes were incorporated in polyvinylidene fluoride (PVDF) membranes using the phase inversion technique. N-methyl 2-pyrolidone solvent gave good dispersion and stability of the CNTs and hence was used for membrane fa...

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Published in: Separation and Purification Technology
ISSN: 1383-5866
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa23857
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spelling 2019-03-30T21:45:20.9821860 v2 23857 2015-10-18 Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties 4b34a0286d3c0b0b081518fa6987031d 0000-0003-2159-7881 Chedly Tizaoui Chedly Tizaoui true false 2015-10-18 CHEG Pristine (CNTs-P) and oxygen-plasma-functionalised (CNTs-O) multi-walled carbon nanotubes were incorporated in polyvinylidene fluoride (PVDF) membranes using the phase inversion technique. N-methyl 2-pyrolidone solvent gave good dispersion and stability of the CNTs and hence was used for membrane fabrication. The membranes were characterised and their performances in water permeation and solutes (NOM, BrO3−, Br− and Cl−) rejection were evaluated at different CNT contents. SEM imaging of the membranes showed asymmetric finger-like porositic structure with small channelling tubes in the top layer that connect with larger channelling tubes in the deeper side. The finger-like pores were shallower in CNTs-O/PVDF membranes than the PVDF or CNTs-P/PVDF membranes. Due to oxygenated groups imparted by CNTs-O, CNTs-O/PVDF membranes were more wettable, presented higher electronegativity and hence better rejection of the anions. CNTs have increased membrane porosities and mean pore sizes and have lead to significantly enhanced water flux by up to 3.3 (CNTs-O) and 3.7 (CNTs-P) times that of pure PVDF membranes. They have also improved the rejections of NOM, bromate, bromide, and chloride at absolute values as high as 93.4%, 21.7%, 10.5%, and 9.2% respectively for CNTs-O/PVDF membrane. CNTs have also enhanced significantly the mechanical properties of the PVDF membranes and a CNT content of 0.2 mass% was optimal. Journal Article Separation and Purification Technology 154 290 300 1383-5866 Polyvinylidene fluoride membrane; Ultrafiltration; Multi-walled carbon nanotubes; Impregnation. 5 11 2015 2015-11-05 10.1016/j.seppur.2015.09.009 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2019-03-30T21:45:20.9821860 2015-10-18T13:00:22.1731102 College of Engineering Engineering Jono Suhartono 1 Chedly Tizaoui 0000-0003-2159-7881 2 0023857-18102015132258.pdf SupplementaryMaterial.pdf 2015-10-18T13:22:58.1430000 Output 427131 application/pdf Accepted Manuscript true 2015-10-18T00:00:00.0000000 false 0023857-18102015132232.pdf 2015_PVDFimpregCNTsMembranes_SepPurifTech_CTizaoui.pdf 2015-10-18T13:22:32.1530000 Output 6788508 application/pdf Accepted Manuscript true 2015-10-18T00:00:00.0000000 false
title Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
spellingShingle Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
Chedly Tizaoui
title_short Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
title_full Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
title_fullStr Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
title_full_unstemmed Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
title_sort Polyvinylidene fluoride membranes impregnated at optimised content of pristine and functionalised multi-walled carbon nanotubes for improved water permeation, solute rejection and mechanical properties
author_id_str_mv 4b34a0286d3c0b0b081518fa6987031d
author_id_fullname_str_mv 4b34a0286d3c0b0b081518fa6987031d_***_Chedly Tizaoui
author Chedly Tizaoui
author2 Jono Suhartono
Chedly Tizaoui
format Journal article
container_title Separation and Purification Technology
container_volume 154
container_start_page 290
publishDate 2015
institution Swansea University
issn 1383-5866
doi_str_mv 10.1016/j.seppur.2015.09.009
college_str College of Engineering
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hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
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description Pristine (CNTs-P) and oxygen-plasma-functionalised (CNTs-O) multi-walled carbon nanotubes were incorporated in polyvinylidene fluoride (PVDF) membranes using the phase inversion technique. N-methyl 2-pyrolidone solvent gave good dispersion and stability of the CNTs and hence was used for membrane fabrication. The membranes were characterised and their performances in water permeation and solutes (NOM, BrO3−, Br− and Cl−) rejection were evaluated at different CNT contents. SEM imaging of the membranes showed asymmetric finger-like porositic structure with small channelling tubes in the top layer that connect with larger channelling tubes in the deeper side. The finger-like pores were shallower in CNTs-O/PVDF membranes than the PVDF or CNTs-P/PVDF membranes. Due to oxygenated groups imparted by CNTs-O, CNTs-O/PVDF membranes were more wettable, presented higher electronegativity and hence better rejection of the anions. CNTs have increased membrane porosities and mean pore sizes and have lead to significantly enhanced water flux by up to 3.3 (CNTs-O) and 3.7 (CNTs-P) times that of pure PVDF membranes. They have also improved the rejections of NOM, bromate, bromide, and chloride at absolute values as high as 93.4%, 21.7%, 10.5%, and 9.2% respectively for CNTs-O/PVDF membrane. CNTs have also enhanced significantly the mechanical properties of the PVDF membranes and a CNT content of 0.2 mass% was optimal.
published_date 2015-11-05T03:34:20Z
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