The Experts below are selected from a list of 108 Experts worldwide ranked by ideXlab platform
Anne Jonquieres - One of the best experts on this subject based on the ideXlab platform.
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Grafting cellulose acetate with ionic liquids for biofuel purification membranes : Influence of the anion.
Carbohydrate polymers, 2018Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:Abstract Membranes made from cellulose acetate grafted with imidazolium or ammonium ionic liquids (ILs) containing different anions were considered for ethyl tert-butyl ether biofuel purification by pervaporation. The new cellulosic materials were obtained after bromide (Br−) exchange by different anions (Tf2N−, BF4−, AcO−). IL structure-membrane property relationships revealed that the membrane properties were strongly improved by varying the anion structure, molecular size and hydrogen bonding acceptor ability β in the Kamlet-Taft polarity scale. The grafted ammonium IL with AcO− anion combined the highest parameter β with big cation/anion sizes and finally led to the best membrane properties with a normalized pervaporation flux of 0.41 kg/h m2 (almost 20 times that of virgin cellulose acetate) for a Reference Thickness of 5 μm and a permeate ethanol content of 100%. Such properties thus corresponded to an outstanding separation factor at 50 °C.
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation
Carbohydrate Polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babina, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters alpha, beta, pi* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182 kg/m(2)h for a Reference Thickness of 5 mu m, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50 degrees C.
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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process
ACS Applied Materials & Interfaces, 2016Co-Authors: Shankarayya Vijay Kumar, Carole Arnal-herault, Miao Wang, Jérôme Babin, Anne JonquieresAbstract:Biobutanol is an attractive renewable biofuel mainly obtained by the acetone-butanol-ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditions. In this work, the grafting of azido-polydimethylsiloxane (PDMS-N3) onto a PDMS-based multiblock copolymer containing alkyne side groups led to a series of original membrane materials with increasing PDMS contents from 50 to 71 wt %. Their membrane properties were assessed for butanol recovery by pervaporation from a model aqueous solution containing 2 wt % of n-butanol at 50 °C. The membrane flux J50μm for a Reference Thickness of 50 μm strongly increased from 84 to 192 g/h m(2) with increasing PDMS content for free-standing dense membranes with Thicknesses in the range of 38-95 μm. At the same time, the intrinsic butanol permeability increased from 1.47 to 4.68 kg μm/h m(2) kPa and the permeate butanol content was also strongly improved from 38 to 53 wt %, corresponding to high and very high membrane separation factors of 30 and 55, respectively. Therefore, the new grafted copolymer materials strongly overcame the common permeability/selectivity trade-off for butanol recovery by a sustainable membrane process.
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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process.
ACS applied materials & interfaces, 2016Co-Authors: Shankarayya Vijay Kumar, Carole Arnal-herault, Miao Wang, Jérôme Babin, Anne JonquieresAbstract:Biobutanol is an attractive renewable biofuel mainly obtained by the acetone–butanol–ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditions. In this work, the grafting of azido-polydimethylsiloxane (PDMS-N3) onto a PDMS-based multiblock copolymer containing alkyne side groups led to a series of original membrane materials with increasing PDMS contents from 50 to 71 wt %. Their membrane properties were assessed for butanol recovery by pervaporation from a model aqueous solution containing 2 wt % of n-butanol at 50 °C. The membrane flux J50μm for a Reference Thickness of 50 μm strongly increased from 84 to 192 g/h m2 with increasing PDMS content for free-standing dense membranes with Thicknesses in the range of 38–95 μm. At the same time, the intrin...
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation.
Carbohydrate polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters α, β, π* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182kg/m(2)h for a Reference Thickness of 5μm, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50°C.
Carole Arnal-herault - One of the best experts on this subject based on the ideXlab platform.
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Grafting cellulose acetate with ionic liquids for biofuel purification membranes : Influence of the anion.
Carbohydrate polymers, 2018Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:Abstract Membranes made from cellulose acetate grafted with imidazolium or ammonium ionic liquids (ILs) containing different anions were considered for ethyl tert-butyl ether biofuel purification by pervaporation. The new cellulosic materials were obtained after bromide (Br−) exchange by different anions (Tf2N−, BF4−, AcO−). IL structure-membrane property relationships revealed that the membrane properties were strongly improved by varying the anion structure, molecular size and hydrogen bonding acceptor ability β in the Kamlet-Taft polarity scale. The grafted ammonium IL with AcO− anion combined the highest parameter β with big cation/anion sizes and finally led to the best membrane properties with a normalized pervaporation flux of 0.41 kg/h m2 (almost 20 times that of virgin cellulose acetate) for a Reference Thickness of 5 μm and a permeate ethanol content of 100%. Such properties thus corresponded to an outstanding separation factor at 50 °C.
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation
Carbohydrate Polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babina, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters alpha, beta, pi* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182 kg/m(2)h for a Reference Thickness of 5 mu m, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50 degrees C.
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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process
ACS Applied Materials & Interfaces, 2016Co-Authors: Shankarayya Vijay Kumar, Carole Arnal-herault, Miao Wang, Jérôme Babin, Anne JonquieresAbstract:Biobutanol is an attractive renewable biofuel mainly obtained by the acetone-butanol-ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditions. In this work, the grafting of azido-polydimethylsiloxane (PDMS-N3) onto a PDMS-based multiblock copolymer containing alkyne side groups led to a series of original membrane materials with increasing PDMS contents from 50 to 71 wt %. Their membrane properties were assessed for butanol recovery by pervaporation from a model aqueous solution containing 2 wt % of n-butanol at 50 °C. The membrane flux J50μm for a Reference Thickness of 50 μm strongly increased from 84 to 192 g/h m(2) with increasing PDMS content for free-standing dense membranes with Thicknesses in the range of 38-95 μm. At the same time, the intrinsic butanol permeability increased from 1.47 to 4.68 kg μm/h m(2) kPa and the permeate butanol content was also strongly improved from 38 to 53 wt %, corresponding to high and very high membrane separation factors of 30 and 55, respectively. Therefore, the new grafted copolymer materials strongly overcame the common permeability/selectivity trade-off for butanol recovery by a sustainable membrane process.
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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process.
ACS applied materials & interfaces, 2016Co-Authors: Shankarayya Vijay Kumar, Carole Arnal-herault, Miao Wang, Jérôme Babin, Anne JonquieresAbstract:Biobutanol is an attractive renewable biofuel mainly obtained by the acetone–butanol–ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditions. In this work, the grafting of azido-polydimethylsiloxane (PDMS-N3) onto a PDMS-based multiblock copolymer containing alkyne side groups led to a series of original membrane materials with increasing PDMS contents from 50 to 71 wt %. Their membrane properties were assessed for butanol recovery by pervaporation from a model aqueous solution containing 2 wt % of n-butanol at 50 °C. The membrane flux J50μm for a Reference Thickness of 50 μm strongly increased from 84 to 192 g/h m2 with increasing PDMS content for free-standing dense membranes with Thicknesses in the range of 38–95 μm. At the same time, the intrin...
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation.
Carbohydrate polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters α, β, π* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182kg/m(2)h for a Reference Thickness of 5μm, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50°C.
Jérôme Babin - One of the best experts on this subject based on the ideXlab platform.
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Grafting cellulose acetate with ionic liquids for biofuel purification membranes : Influence of the anion.
Carbohydrate polymers, 2018Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:Abstract Membranes made from cellulose acetate grafted with imidazolium or ammonium ionic liquids (ILs) containing different anions were considered for ethyl tert-butyl ether biofuel purification by pervaporation. The new cellulosic materials were obtained after bromide (Br−) exchange by different anions (Tf2N−, BF4−, AcO−). IL structure-membrane property relationships revealed that the membrane properties were strongly improved by varying the anion structure, molecular size and hydrogen bonding acceptor ability β in the Kamlet-Taft polarity scale. The grafted ammonium IL with AcO− anion combined the highest parameter β with big cation/anion sizes and finally led to the best membrane properties with a normalized pervaporation flux of 0.41 kg/h m2 (almost 20 times that of virgin cellulose acetate) for a Reference Thickness of 5 μm and a permeate ethanol content of 100%. Such properties thus corresponded to an outstanding separation factor at 50 °C.
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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process
ACS Applied Materials & Interfaces, 2016Co-Authors: Shankarayya Vijay Kumar, Carole Arnal-herault, Miao Wang, Jérôme Babin, Anne JonquieresAbstract:Biobutanol is an attractive renewable biofuel mainly obtained by the acetone-butanol-ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditions. In this work, the grafting of azido-polydimethylsiloxane (PDMS-N3) onto a PDMS-based multiblock copolymer containing alkyne side groups led to a series of original membrane materials with increasing PDMS contents from 50 to 71 wt %. Their membrane properties were assessed for butanol recovery by pervaporation from a model aqueous solution containing 2 wt % of n-butanol at 50 °C. The membrane flux J50μm for a Reference Thickness of 50 μm strongly increased from 84 to 192 g/h m(2) with increasing PDMS content for free-standing dense membranes with Thicknesses in the range of 38-95 μm. At the same time, the intrinsic butanol permeability increased from 1.47 to 4.68 kg μm/h m(2) kPa and the permeate butanol content was also strongly improved from 38 to 53 wt %, corresponding to high and very high membrane separation factors of 30 and 55, respectively. Therefore, the new grafted copolymer materials strongly overcame the common permeability/selectivity trade-off for butanol recovery by a sustainable membrane process.
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Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process.
ACS applied materials & interfaces, 2016Co-Authors: Shankarayya Vijay Kumar, Carole Arnal-herault, Miao Wang, Jérôme Babin, Anne JonquieresAbstract:Biobutanol is an attractive renewable biofuel mainly obtained by the acetone–butanol–ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditions. In this work, the grafting of azido-polydimethylsiloxane (PDMS-N3) onto a PDMS-based multiblock copolymer containing alkyne side groups led to a series of original membrane materials with increasing PDMS contents from 50 to 71 wt %. Their membrane properties were assessed for butanol recovery by pervaporation from a model aqueous solution containing 2 wt % of n-butanol at 50 °C. The membrane flux J50μm for a Reference Thickness of 50 μm strongly increased from 84 to 192 g/h m2 with increasing PDMS content for free-standing dense membranes with Thicknesses in the range of 38–95 μm. At the same time, the intrin...
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation.
Carbohydrate polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters α, β, π* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182kg/m(2)h for a Reference Thickness of 5μm, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50°C.
Faten Hassan Hassan Abdellatif - One of the best experts on this subject based on the ideXlab platform.
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Grafting cellulose acetate with ionic liquids for biofuel purification membranes : Influence of the anion.
Carbohydrate polymers, 2018Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:Abstract Membranes made from cellulose acetate grafted with imidazolium or ammonium ionic liquids (ILs) containing different anions were considered for ethyl tert-butyl ether biofuel purification by pervaporation. The new cellulosic materials were obtained after bromide (Br−) exchange by different anions (Tf2N−, BF4−, AcO−). IL structure-membrane property relationships revealed that the membrane properties were strongly improved by varying the anion structure, molecular size and hydrogen bonding acceptor ability β in the Kamlet-Taft polarity scale. The grafted ammonium IL with AcO− anion combined the highest parameter β with big cation/anion sizes and finally led to the best membrane properties with a normalized pervaporation flux of 0.41 kg/h m2 (almost 20 times that of virgin cellulose acetate) for a Reference Thickness of 5 μm and a permeate ethanol content of 100%. Such properties thus corresponded to an outstanding separation factor at 50 °C.
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation
Carbohydrate Polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babina, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters alpha, beta, pi* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182 kg/m(2)h for a Reference Thickness of 5 mu m, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50 degrees C.
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation.
Carbohydrate polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters α, β, π* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182kg/m(2)h for a Reference Thickness of 5μm, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50°C.
Laurent David - One of the best experts on this subject based on the ideXlab platform.
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Grafting cellulose acetate with ionic liquids for biofuel purification membranes : Influence of the anion.
Carbohydrate polymers, 2018Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:Abstract Membranes made from cellulose acetate grafted with imidazolium or ammonium ionic liquids (ILs) containing different anions were considered for ethyl tert-butyl ether biofuel purification by pervaporation. The new cellulosic materials were obtained after bromide (Br−) exchange by different anions (Tf2N−, BF4−, AcO−). IL structure-membrane property relationships revealed that the membrane properties were strongly improved by varying the anion structure, molecular size and hydrogen bonding acceptor ability β in the Kamlet-Taft polarity scale. The grafted ammonium IL with AcO− anion combined the highest parameter β with big cation/anion sizes and finally led to the best membrane properties with a normalized pervaporation flux of 0.41 kg/h m2 (almost 20 times that of virgin cellulose acetate) for a Reference Thickness of 5 μm and a permeate ethanol content of 100%. Such properties thus corresponded to an outstanding separation factor at 50 °C.
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation
Carbohydrate Polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babina, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters alpha, beta, pi* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182 kg/m(2)h for a Reference Thickness of 5 mu m, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50 degrees C.
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Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation.
Carbohydrate polymers, 2016Co-Authors: Faten Hassan Hassan Abdellatif, Carole Arnal-herault, Jérôme Babin, Laurent David, Anne JonquieresAbstract:A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters α, β, π* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182kg/m(2)h for a Reference Thickness of 5μm, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50°C.