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Bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO)-based amphoteric hollow-fiber membranes / Zhenfeng Cheng in Industrial & engineering chemistry research, Vol. 49 N° 18 (Septembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8741–8748 Titre : Bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO)-based amphoteric hollow-fiber membranes : preparation and lysozyme adsorption Type de document : texte imprimé Auteurs : Zhenfeng Cheng, Auteur ; Cuiming Wu, Auteur ; Weihua Yang, Auteur Année de publication : 2010 Article en page(s) : pp. 8741–8748 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hollow-fiber  membrane Résumé : For the recovery and purification of proteins, an amphoteric hollow-fiber membrane (AHFM) was prepared from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) by ethylenediamination and carboxylation. The success in modifying BPPO was confirmed by FTIR spectra, amphoteric group density, anion-exchange capacity (AEC), and cation-exchange capacity (CEC). For potential applications, the membranes were tested for the adsorption of lysozyme, and the results showed that the adsorption amount increased with increasing initial lysozyme concentration. The adsorption fits the Langmuir isotherm and the Freundlich equation well, and the maximum experimental amount of lysozyme adsorbed was found to be 4.00 mg/g, which was close to the calculated values (3.85 and 4.13 mg/g according to the Langmuir and Freundlich equations, respectively). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100348e [article] Bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO)-based amphoteric hollow-fiber membranes : preparation and lysozyme adsorption [texte imprimé] / Zhenfeng Cheng, Auteur ; Cuiming Wu, Auteur ; Weihua Yang, Auteur . - 2010 . - pp. 8741–8748. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8741–8748 Mots-clés : Hollow-fiber  membrane Résumé : For the recovery and purification of proteins, an amphoteric hollow-fiber membrane (AHFM) was prepared from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) by ethylenediamination and carboxylation. The success in modifying BPPO was confirmed by FTIR spectra, amphoteric group density, anion-exchange capacity (AEC), and cation-exchange capacity (CEC). For potential applications, the membranes were tested for the adsorption of lysozyme, and the results showed that the adsorption amount increased with increasing initial lysozyme concentration. The adsorption fits the Langmuir isotherm and the Freundlich equation well, and the maximum experimental amount of lysozyme adsorbed was found to be 4.00 mg/g, which was close to the calculated values (3.85 and 4.13 mg/g according to the Langmuir and Freundlich equations, respectively). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100348e

Development of a novel hollow fiber ccation-exchange membrane from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) for removal of heavy-metal ions / Zhenfeng Cheng in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3079–3087 Titre : Development of a novel hollow fiber ccation-exchange membrane from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) for removal of heavy-metal ions Type de document : texte imprimé Auteurs : Zhenfeng Cheng, Auteur ; Yonghui Wu, Auteur ; Na Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 3079–3087 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Hollow  Fiber  Cation-Exchange  Membrane  Bromomethylated  Poly  Heavy-Metal  Ions  dimethy  phenylene  oxide  phenyleemoval Résumé : A novel hollow fiber cation-exchange membrane was prepared from a bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) hollow fiber by amination and sulfonation. The membrane exhibited good performance for adsorption of Cu2+, and its maximum capacity can reach 69.12 mg/g. In particular, the adsorption capacity increased with an increase in adsorption time, initial Cu2+ concentration, and ion-exchange capacity of the membrane, and the adsorption isotherms were of Langmuir and Freundlich types. When these membranes were taken for desorption in solutions of hydrochloric acid, the regeneration ratio increased with an increase in regeneration time (before 20 min) and acid concentration. This study can provide new material for removal of heavy-metal ions in an energy-saving manner. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901408c [article] Development of a novel hollow fiber ccation-exchange membrane from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) for removal of heavy-metal ions [texte imprimé] / Zhenfeng Cheng, Auteur ; Yonghui Wu, Auteur ; Na Wang, Auteur . - 2010 . - pp. 3079–3087. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3079–3087 Mots-clés : Hollow  Fiber  Cation-Exchange  Membrane  Bromomethylated  Poly  Heavy-Metal  Ions  dimethy  phenylene  oxide  phenyleemoval Résumé : A novel hollow fiber cation-exchange membrane was prepared from a bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) hollow fiber by amination and sulfonation. The membrane exhibited good performance for adsorption of Cu2+, and its maximum capacity can reach 69.12 mg/g. In particular, the adsorption capacity increased with an increase in adsorption time, initial Cu2+ concentration, and ion-exchange capacity of the membrane, and the adsorption isotherms were of Langmuir and Freundlich types. When these membranes were taken for desorption in solutions of hydrochloric acid, the regeneration ratio increased with an increase in regeneration time (before 20 min) and acid concentration. This study can provide new material for removal of heavy-metal ions in an energy-saving manner. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901408c