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Antifouling property of a weak polyelectrolyte membrane based on poly(acrylonitrile) during protein ultrafiltration / Su, Yanlei in Industrial & engineering chemistry research, Vol. 48 N° 6 (Mars 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 3136–3141 Titre : Antifouling property of a weak polyelectrolyte membrane based on poly(acrylonitrile) during protein ultrafiltration Type de document : texte imprimé Auteurs : Su, Yanlei, Auteur ; Chunxia Mu, Auteur ; Chao Li, Auteur Année de publication : 2009 Article en page(s) : pp. 3136–3141 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Weak  polyelectrolyte  membrane  Poly(acrylonitrile)  Bovine  serum  albumin  Lysozyme  Antifouling  property Résumé : The permeability of a weak polyelectrolyte ultrafiltration membrane based on poly(acrylonitrile and 2-dimethylaminoethyl methacrylate) (PAN-DMAEMA) copolymer was measured at various conditions of solution pH and ionic strength. Bovine serum albumin (BSA) and lysozyme were used as model proteins to investigate the antifouling property of PAN-DMAEMA ultrafiltration membrane. Electrostatic interactions, the conformation of PDMAEMA chains, and the nature of protein play important roles in enhancing the antifouling property of PAN-DMAEAM membrane. During BSA ultrafiltration, BSA rejection ratio is decreased, flux recovery ratio is remarkably increased, and the total membrane fouling and irreversible membrane fouling are decreased at higher pH value and ionic strength. During lysozyme ultrafiltration, the PAN-DMAEAM membrane displays excellent antifouling property in a broad range of pH and ionic strength. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801393z [article] Antifouling property of a weak polyelectrolyte membrane based on poly(acrylonitrile) during protein ultrafiltration [texte imprimé] / Su, Yanlei, Auteur ; Chunxia Mu, Auteur ; Chao Li, Auteur . - 2009 . - pp. 3136–3141. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 3136–3141 Mots-clés : Weak  polyelectrolyte  membrane  Poly(acrylonitrile)  Bovine  serum  albumin  Lysozyme  Antifouling  property Résumé : The permeability of a weak polyelectrolyte ultrafiltration membrane based on poly(acrylonitrile and 2-dimethylaminoethyl methacrylate) (PAN-DMAEMA) copolymer was measured at various conditions of solution pH and ionic strength. Bovine serum albumin (BSA) and lysozyme were used as model proteins to investigate the antifouling property of PAN-DMAEMA ultrafiltration membrane. Electrostatic interactions, the conformation of PDMAEMA chains, and the nature of protein play important roles in enhancing the antifouling property of PAN-DMAEAM membrane. During BSA ultrafiltration, BSA rejection ratio is decreased, flux recovery ratio is remarkably increased, and the total membrane fouling and irreversible membrane fouling are decreased at higher pH value and ionic strength. During lysozyme ultrafiltration, the PAN-DMAEAM membrane displays excellent antifouling property in a broad range of pH and ionic strength. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801393z

Effects of coagulation bath temperature on the separation performance and antifouling property of poly(ether sulfone) ultrafiltration membranes / Jinming Peng in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4858-4864 Titre : Effects of coagulation bath temperature on the separation performance and antifouling property of poly(ether sulfone) ultrafiltration membranes Type de document : texte imprimé Auteurs : Jinming Peng, Auteur ; Su, Yanlei, Auteur ; Wenjuan Chen, Auteur Année de publication : 2010 Article en page(s) : pp. 4858-4864 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Membrane  separation  Ultrafiltration  Flocculation  Coagulation Résumé : Poly(ether sulfone) (PES) ultrafiltration membranes are fabricated via nonsolvent-induced phase separation by blending with hydrophilic homopolymer additive poly(ethylene glycol) (PEG) or amphiphilic block copolymer Pluronic F127. The effects of coagulation bath temperature (CBT) on membrane structure, separation performance, and antifouling property are investigated in detail. All the membranes display an asymmetric morphology. PES/PEG membranes possess only fingerlike pores of support layer, while there is a spongelike sublayer between skin layer and the fingerlike pores for PES/Pluronic F127 membranes. The thickness of the spongelike sublayer for PES/Pluronic F127 membranes is remarkablely decreased with the increase of CBT. For all the membranes, pure water flux increases substantially with the increase of CBT. The rejection of PES/PEG membrane for bovine serum albumin (BSA) is above 95%. However, the rejection of PES/Pluronic F127 membrane for BSA molecules is decreased sharply form 95.3% to 10.2% with the increase of CBT from 20 to 60 °C. At higher CBT, the antifouling capabilities of PES/Pluronic F127 membranes are slightly weakened mainly because of the lower surface coverage of amphiphilic copolymer. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22797481 [article] Effects of coagulation bath temperature on the separation performance and antifouling property of poly(ether sulfone) ultrafiltration membranes [texte imprimé] / Jinming Peng, Auteur ; Su, Yanlei, Auteur ; Wenjuan Chen, Auteur . - 2010 . - pp. 4858-4864. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4858-4864 Mots-clés : Membrane  separation  Ultrafiltration  Flocculation  Coagulation Résumé : Poly(ether sulfone) (PES) ultrafiltration membranes are fabricated via nonsolvent-induced phase separation by blending with hydrophilic homopolymer additive poly(ethylene glycol) (PEG) or amphiphilic block copolymer Pluronic F127. The effects of coagulation bath temperature (CBT) on membrane structure, separation performance, and antifouling property are investigated in detail. All the membranes display an asymmetric morphology. PES/PEG membranes possess only fingerlike pores of support layer, while there is a spongelike sublayer between skin layer and the fingerlike pores for PES/Pluronic F127 membranes. The thickness of the spongelike sublayer for PES/Pluronic F127 membranes is remarkablely decreased with the increase of CBT. For all the membranes, pure water flux increases substantially with the increase of CBT. The rejection of PES/PEG membrane for bovine serum albumin (BSA) is above 95%. However, the rejection of PES/Pluronic F127 membrane for BSA molecules is decreased sharply form 95.3% to 10.2% with the increase of CBT from 20 to 60 °C. At higher CBT, the antifouling capabilities of PES/Pluronic F127 membranes are slightly weakened mainly because of the lower surface coverage of amphiphilic copolymer. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22797481

A feasible post-treatment of drying and rewetting for preparation of high-flux pluronic F127/polyethersulfone nanofiltration membranes / Yan Zhang in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp.4678–4685 Titre : A feasible post-treatment of drying and rewetting for preparation of high-flux pluronic F127/polyethersulfone nanofiltration membranes Type de document : texte imprimé Auteurs : Yan Zhang, Auteur ; Su, Yanlei, Auteur ; Wenjuan Chen, Auteur Année de publication : 2011 Article en page(s) : pp.4678–4685 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pluronic  Nanofiltration  membranes Résumé : Pluronic F127/polyethersulfone (PES) blend nanofiltration membranes were fabricated by varying polymer weight ratios of WF127/WPES in casting solutions from 0.0 to 100.0 wt %. The initial wet membranes prepared via the phase inversion method were post-treated by drying at room temperature and then immersion into water for rewetting to obtain Pluronic F127/PES nanofiltration membranes. Membrane shrinkage and swelling, cross section and surface morphologies, water uptake, surface hydrophilicity, X-ray diffraction pattern, water flux, and rejection of dyes for Pluronic F127/PES nanofiltration membranes were investigated. The introduction of Pluronic F127 into PES membranes can substantially alleviate the membrane shrinkage during drying treatment. All of the prepared Pluronic F127/PES nanofiltration membranes can completely reject Alcian blue with a molecular weight of 1299. The water permeance of Pluronic F127/PES nanofiltration membrane at WF127/WPES of 80% is as high as 176.2 L/(m2 h MPa). After long-term immersion into sodium hypochlorite solution, Pluronic F127/PES nanofiltration membranes still keep over 95.7% rejection of Alcian blue. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102463k [article] A feasible post-treatment of drying and rewetting for preparation of high-flux pluronic F127/polyethersulfone nanofiltration membranes [texte imprimé] / Yan Zhang, Auteur ; Su, Yanlei, Auteur ; Wenjuan Chen, Auteur . - 2011 . - pp.4678–4685. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp.4678–4685 Mots-clés : Pluronic  Nanofiltration  membranes Résumé : Pluronic F127/polyethersulfone (PES) blend nanofiltration membranes were fabricated by varying polymer weight ratios of WF127/WPES in casting solutions from 0.0 to 100.0 wt %. The initial wet membranes prepared via the phase inversion method were post-treated by drying at room temperature and then immersion into water for rewetting to obtain Pluronic F127/PES nanofiltration membranes. Membrane shrinkage and swelling, cross section and surface morphologies, water uptake, surface hydrophilicity, X-ray diffraction pattern, water flux, and rejection of dyes for Pluronic F127/PES nanofiltration membranes were investigated. The introduction of Pluronic F127 into PES membranes can substantially alleviate the membrane shrinkage during drying treatment. All of the prepared Pluronic F127/PES nanofiltration membranes can completely reject Alcian blue with a molecular weight of 1299. The water permeance of Pluronic F127/PES nanofiltration membrane at WF127/WPES of 80% is as high as 176.2 L/(m2 h MPa). After long-term immersion into sodium hypochlorite solution, Pluronic F127/PES nanofiltration membranes still keep over 95.7% rejection of Alcian blue. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102463k

Improved antifouling property of PES ultrafiltration membranes using additive of silica−PVP nanocomposite / Sun, Mengping in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 790–796 Titre : Improved antifouling property of PES ultrafiltration membranes using additive of silica−PVP nanocomposite Type de document : texte imprimé Auteurs : Sun, Mengping, Auteur ; Su, Yanlei, Auteur ; Chunxia Mu, Auteur Année de publication : 2010 Article en page(s) : pp 790–796 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Silica  PVP  nanocomposite  Hydrophilic  additive  PES  ultrafiltration  membranes. Résumé : To improve the surface coverage of polyvinylpyrrolidone (PVP) on membrane surfaces and further enhance the antifouling property, a silica−PVP nanocomposite was synthesized and used as a novel hydrophilic additive to modify polyethersulfone (PES) membranes. Transmission electron microscopy (TEM) observation showed that PES membranes, using additives of PVP and silica−PVP nanocomposites, have similar asymmetric structures. X-ray photoelectron spectroscopy (XPS) measurement indicated that the near-surface coverage of PVP for PES membrane with a silica−PVP nanocomposite additive is greater than that with a PVP additive. Protein ultrafiltration experiment also showed that the antifouling ability of PES membrane with a silica-PVP nanocomposite additive is stronger than that with a PVP additive. The hydrophilic modification with a silica−PVP nanocomposite is an appropriate method for improved antifouling property of PES ultrafiltration membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900560e [article] Improved antifouling property of PES ultrafiltration membranes using additive of silica−PVP nanocomposite [texte imprimé] / Sun, Mengping, Auteur ; Su, Yanlei, Auteur ; Chunxia Mu, Auteur . - 2010 . - pp 790–796. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 790–796 Mots-clés : Silica  PVP  nanocomposite  Hydrophilic  additive  PES  ultrafiltration  membranes. Résumé : To improve the surface coverage of polyvinylpyrrolidone (PVP) on membrane surfaces and further enhance the antifouling property, a silica−PVP nanocomposite was synthesized and used as a novel hydrophilic additive to modify polyethersulfone (PES) membranes. Transmission electron microscopy (TEM) observation showed that PES membranes, using additives of PVP and silica−PVP nanocomposites, have similar asymmetric structures. X-ray photoelectron spectroscopy (XPS) measurement indicated that the near-surface coverage of PVP for PES membrane with a silica−PVP nanocomposite additive is greater than that with a PVP additive. Protein ultrafiltration experiment also showed that the antifouling ability of PES membrane with a silica-PVP nanocomposite additive is stronger than that with a PVP additive. The hydrophilic modification with a silica−PVP nanocomposite is an appropriate method for improved antifouling property of PES ultrafiltration membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900560e

Improved performance of poly(Vinylidene Fluoride) microfiltration membranes prepared by freeze and immersion precipitation coupling method / Su, Yanlei in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10525-10532 Titre : Improved performance of poly(Vinylidene Fluoride) microfiltration membranes prepared by freeze and immersion precipitation coupling method Type de document : texte imprimé Auteurs : Su, Yanlei, Auteur ; Yangui Liang, Auteur ; Chunxia Mu, Auteur Année de publication : 2011 Article en page(s) : pp. 10525-10532 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Immersion  Membrane  separation  Microfiltration Résumé : Cellulose acetate (CA) was used as a hydrophilic additive to blend with poly(vinylidene fluoride) (PVDF) for preparing casting solutions. A novel freeze and immersion precipitation coupling method was developed to improve the performance of PVDF microporous membranes. X-ray photoelectron spectroscopy (XPS) analysis confirmed the enrichment of CA segments on the PVDF membrane surfaces. The level of CA surface segregation on PVDF membrane surfaces was dramatically influenced by the freezing time. The hypothesis ofsolid (frozen DMSO)—liquid—solid (precipitated polymer) phase separation was proposed to explain the CA surface enrichment phenomenon. The mechanical strength and antifouling property of the PVDF microfiltration membranes were simultaneously improved by the synergistic action of freeze and immersion precipitation coupling technique. The PVDF microfiltration membranes exhibited higher permeability and better antifouling property in bioseparation process than that fabricated by the individual freeze technique. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523875 [article] Improved performance of poly(Vinylidene Fluoride) microfiltration membranes prepared by freeze and immersion precipitation coupling method [texte imprimé] / Su, Yanlei, Auteur ; Yangui Liang, Auteur ; Chunxia Mu, Auteur . - 2011 . - pp. 10525-10532. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10525-10532 Mots-clés : Immersion  Membrane  separation  Microfiltration Résumé : Cellulose acetate (CA) was used as a hydrophilic additive to blend with poly(vinylidene fluoride) (PVDF) for preparing casting solutions. A novel freeze and immersion precipitation coupling method was developed to improve the performance of PVDF microporous membranes. X-ray photoelectron spectroscopy (XPS) analysis confirmed the enrichment of CA segments on the PVDF membrane surfaces. The level of CA surface segregation on PVDF membrane surfaces was dramatically influenced by the freezing time. The hypothesis ofsolid (frozen DMSO)—liquid—solid (precipitated polymer) phase separation was proposed to explain the CA surface enrichment phenomenon. The mechanical strength and antifouling property of the PVDF microfiltration membranes were simultaneously improved by the synergistic action of freeze and immersion precipitation coupling technique. The PVDF microfiltration membranes exhibited higher permeability and better antifouling property in bioseparation process than that fabricated by the individual freeze technique. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523875

Preparation and performance of antifouling PVC / CPVC blend ultrafiltration membranes / Jiazhen Liu in Industrial & engineering chemistry research, Vol. 51 N° 24 (Juin 2012) 

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