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Plasticization of [C12MIM] [PF6] ionic liquid on foaming performance of poly(methyl methacrylate) in supercritical CO2 / Fang-fang Tong in Industrial & engineering chemistry research, Vol. 51 N° 38 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 38 (Septembre 2012) . - pp. 12329–12336 Titre : Plasticization of [C12MIM] [PF6] ionic liquid on foaming performance of poly(methyl methacrylate) in supercritical CO2 Type de document : texte imprimé Auteurs : Fang-fang Tong, Auteur ; Xu Hong, Auteur ; Jian Yu, Auteur Année de publication : 2012 Article en page(s) : pp. 12329–12336 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ionic  liquid Résumé : A series of poly(methyl methacrylate) (PMMA)/1-dodecyl-3-methylimidazolium hexafluorophosphate ionic liquid ([C12MIM][PF6]) blends were prepared by melt blending. The compatibility of blends was verified by scanning electron microscopy and differential scanning calorimetry. The introduction of [C12MIM][PF6] decreased the glass transition temperature of the blends due to its plasticization effect and increased the diffusivity of CO2 without significantly affecting the CO2 solubility. These blends were foamed with supercritical CO2 as the blowing agent via a pressure-quenching process. The foaming conditions are divided into three regions according to the main morphological difference of foams. At relatively low temperatures and pressures, neat PMMA could not be foamed, while the addition of [C12MIM][PF6] facilitated the formation of cells. By increasing temperature or pressure, neat PMMA foams were obtained with wide cell size distribution, while the blend foams were formed with narrowed cell size distribution and increased cell size. At high temperatures and pressures, neat PMMA was foamed with narrow cell size distribution and high cell density, while the major effect of [C12MIM][PF6] was to increase the cell size. These results indicated that the plasticization effect and the low surface energy of [C12MIM][PF6] accounted for the differences on the cell morphology between neat PMMA and the blend foams. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301409h [article] Plasticization of [C12MIM] [PF6] ionic liquid on foaming performance of poly(methyl methacrylate) in supercritical CO2 [texte imprimé] / Fang-fang Tong, Auteur ; Xu Hong, Auteur ; Jian Yu, Auteur . - 2012 . - pp. 12329–12336. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 38 (Septembre 2012) . - pp. 12329–12336 Mots-clés : Ionic  liquid Résumé : A series of poly(methyl methacrylate) (PMMA)/1-dodecyl-3-methylimidazolium hexafluorophosphate ionic liquid ([C12MIM][PF6]) blends were prepared by melt blending. The compatibility of blends was verified by scanning electron microscopy and differential scanning calorimetry. The introduction of [C12MIM][PF6] decreased the glass transition temperature of the blends due to its plasticization effect and increased the diffusivity of CO2 without significantly affecting the CO2 solubility. These blends were foamed with supercritical CO2 as the blowing agent via a pressure-quenching process. The foaming conditions are divided into three regions according to the main morphological difference of foams. At relatively low temperatures and pressures, neat PMMA could not be foamed, while the addition of [C12MIM][PF6] facilitated the formation of cells. By increasing temperature or pressure, neat PMMA foams were obtained with wide cell size distribution, while the blend foams were formed with narrowed cell size distribution and increased cell size. At high temperatures and pressures, neat PMMA was foamed with narrow cell size distribution and high cell density, while the major effect of [C12MIM][PF6] was to increase the cell size. These results indicated that the plasticization effect and the low surface energy of [C12MIM][PF6] accounted for the differences on the cell morphology between neat PMMA and the blend foams. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301409h

Upgrading ash - rich activated carbon from distilled spirit lees / Juan Yang in Industrial & engineering chemistry research, Vol. 51 N° 17 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6037–6043 Titre : Upgrading ash - rich activated carbon from distilled spirit lees Type de document : texte imprimé Auteurs : Juan Yang, Auteur ; Jian Yu, Auteur ; Wei Zhao, Auteur Année de publication : 2012 Article en page(s) : pp. 6037–6043 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : steam  activated  carbon Résumé : Activated carbon (AC) was prepared from ash-rich distilled spirit lees via carbonization and successive activation incorporated with different deashing methods. The results show that the alkali treatment of the steam-activated carbon (ATAC) produced the AC with the highest performance in comparison with the NaOH activation and direct alkali treatment of the carbonized carbon (ATCC). The ATAC removed 84.4% of the ash from steam-activated carbon and increased the BET surface area and total pore volume by 92.3% and 109.3%, respectively, resulting in the AC with its ash content of 11 wt %, BET surface area of 620 m2/g, and total pore volume of 0.67 cm3/g. The article also revealed that it is possible to use the alkaline leaching solution from the ATAC, which is mainly composed of sodium silicate, as the major binder to mold the produced powder AC. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202882r [article] Upgrading ash - rich activated carbon from distilled spirit lees [texte imprimé] / Juan Yang, Auteur ; Jian Yu, Auteur ; Wei Zhao, Auteur . - 2012 . - pp. 6037–6043. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6037–6043 Mots-clés : steam  activated  carbon Résumé : Activated carbon (AC) was prepared from ash-rich distilled spirit lees via carbonization and successive activation incorporated with different deashing methods. The results show that the alkali treatment of the steam-activated carbon (ATAC) produced the AC with the highest performance in comparison with the NaOH activation and direct alkali treatment of the carbonized carbon (ATCC). The ATAC removed 84.4% of the ash from steam-activated carbon and increased the BET surface area and total pore volume by 92.3% and 109.3%, respectively, resulting in the AC with its ash content of 11 wt %, BET surface area of 620 m2/g, and total pore volume of 0.67 cm3/g. The article also revealed that it is possible to use the alkaline leaching solution from the ATAC, which is mainly composed of sodium silicate, as the major binder to mold the produced powder AC. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202882r