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Improved coating window for slot coating / Chih-Ping Chin in Industrial & engineering chemistry research, Vol. 49 N° 8 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3802–3809 Titre : Improved coating window for slot coating Type de document : texte imprimé Auteurs : Chih-Ping Chin, Auteur ; Ho Shing Wu, Auteur ; Shaw S. Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 3802–3809 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Coating  low  viscosity  with  high  viscosity Résumé : Slot die is a premetered coating operation in which the coating solution is extruded from a feed slot onto the surface of a substrate passing through. The defect-free region of operation is known as the “coating window”, and the wider it is, the more versatile the operation will be. The slot-coating experiments reported here were carried out with two types of coating solutions, a hard coating solution with low viscosity and a polysilica solution with high viscosity. The coating windows were measured as flow rates q versus minimum and maximum coating speeds, Vmin and Vmax, respectively. Therefore, at a given flow rate of the coating solution, there exists a minimum speed and a maximum speed that border the corresponding coating window, outside which coating defects occur. Also, in our experiments, the coating windows shifted to higher coating speed and obtained thinner coating film thicknesses through different settings of the die angle to the substrate and different geometries of die lips. The data showed that the coating windows shifted to higher speed and thinner film thicknesses when the die angle and the geometry of the die lips were varied appropriately. These results have important practical implications. The fundamental principles involved here are also applicable to other premetered coating processes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801900t [article] Improved coating window for slot coating [texte imprimé] / Chih-Ping Chin, Auteur ; Ho Shing Wu, Auteur ; Shaw S. Wang, Auteur . - 2010 . - pp. 3802–3809. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3802–3809 Mots-clés : Coating  low  viscosity  with  high  viscosity Résumé : Slot die is a premetered coating operation in which the coating solution is extruded from a feed slot onto the surface of a substrate passing through. The defect-free region of operation is known as the “coating window”, and the wider it is, the more versatile the operation will be. The slot-coating experiments reported here were carried out with two types of coating solutions, a hard coating solution with low viscosity and a polysilica solution with high viscosity. The coating windows were measured as flow rates q versus minimum and maximum coating speeds, Vmin and Vmax, respectively. Therefore, at a given flow rate of the coating solution, there exists a minimum speed and a maximum speed that border the corresponding coating window, outside which coating defects occur. Also, in our experiments, the coating windows shifted to higher coating speed and obtained thinner coating film thicknesses through different settings of the die angle to the substrate and different geometries of die lips. The data showed that the coating windows shifted to higher speed and thinner film thicknesses when the die angle and the geometry of the die lips were varied appropriately. These results have important practical implications. The fundamental principles involved here are also applicable to other premetered coating processes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801900t

Salting - Out effect on recovery of 1,3 - propanediol from fermentation broth / Ho Shing Wu in Industrial & engineering chemistry research, Vol. 51 N° 33 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 33 (Août 2012) . - pp. 10930–10935 Titre : Salting - Out effect on recovery of 1,3 - propanediol from fermentation broth Type de document : texte imprimé Auteurs : Ho Shing Wu, Auteur ; Yan Jie Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 10930–10935 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Separation  propanediol Résumé : This study investigated the separation of 1,3-propanediol from a fermentation broth produced using Klebsiella pneumoniae. Salting-out extraction was used to separate 1,3-propanediol using one-salt and two-salt systems. The highest distribution coefficient and recovery of 1,3-propanediol between pentanol and an aqueous solution of a single-salt system using sodium phosphate (0.4 g/mL) were 3.72% and 72%, respectively; and 2.52% and 65.6%, respectively, when using sodium sulfate (0.4 g/mL). For the two-salt system using sodium phosphate (0.4 g/mL) and sodium sulfate (0.2 g/mL), the results were 47.2% and 92.5%, respectively. The stripping recovery of 1,3-propanediol using pure water was approximately 90%. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300404t [article] Salting - Out effect on recovery of 1,3 - propanediol from fermentation broth [texte imprimé] / Ho Shing Wu, Auteur ; Yan Jie Wang, Auteur . - 2012 . - pp. 10930–10935. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 33 (Août 2012) . - pp. 10930–10935 Mots-clés : Separation  propanediol Résumé : This study investigated the separation of 1,3-propanediol from a fermentation broth produced using Klebsiella pneumoniae. Salting-out extraction was used to separate 1,3-propanediol using one-salt and two-salt systems. The highest distribution coefficient and recovery of 1,3-propanediol between pentanol and an aqueous solution of a single-salt system using sodium phosphate (0.4 g/mL) were 3.72% and 72%, respectively; and 2.52% and 65.6%, respectively, when using sodium sulfate (0.4 g/mL). For the two-salt system using sodium phosphate (0.4 g/mL) and sodium sulfate (0.2 g/mL), the results were 47.2% and 92.5%, respectively. The stripping recovery of 1,3-propanediol using pure water was approximately 90%. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300404t