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Effects of electric field on multineedle electrospinning / Sheng Xie in Industrial & engineering chemistry research, Vol. 51 N° 14 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5336–5345 Titre : Effects of electric field on multineedle electrospinning : Experiment and simulation study Type de document : texte imprimé Auteurs : Sheng Xie, Auteur ; Yongchun Zeng, Auteur Année de publication : 2012 Article en page(s) : pp. 5336–5345 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Electric  field  Electrospinning Résumé : Electrospinning and melt blowing are the most commonly used processes for producing microfibrous nonwovens. In this paper, we study mass production of electrospinning with a multineedle system. To achieve uniform fibers at a high production rate, an auxiliary plate electrode has been used to be connected to a three-needle system to obtain a more uniform electric field. The spinnerets with two kinds of needle array, linear three-needle and triangular three-needle, are studied. The results of electrospinning experiments and electric field simulation demonstrate that the multineedle spinneret with an auxiliary plate can produce finer and more uniform nanofibers. And the fibers can be collected in a more concentrated area with the auxiliary plate. We also focus on the effect of the needle length protruded outside the plate. This study shows a possibility that by designing the electric field distribution, we can produce thinner fibers and more concentrated collection mats at a high production rate. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2020763 [article] Effects of electric field on multineedle electrospinning : Experiment and simulation study [texte imprimé] / Sheng Xie, Auteur ; Yongchun Zeng, Auteur . - 2012 . - pp. 5336–5345. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5336–5345 Mots-clés : Electric  field  Electrospinning Résumé : Electrospinning and melt blowing are the most commonly used processes for producing microfibrous nonwovens. In this paper, we study mass production of electrospinning with a multineedle system. To achieve uniform fibers at a high production rate, an auxiliary plate electrode has been used to be connected to a three-needle system to obtain a more uniform electric field. The spinnerets with two kinds of needle array, linear three-needle and triangular three-needle, are studied. The results of electrospinning experiments and electric field simulation demonstrate that the multineedle spinneret with an auxiliary plate can produce finer and more uniform nanofibers. And the fibers can be collected in a more concentrated area with the auxiliary plate. We also focus on the effect of the needle length protruded outside the plate. This study shows a possibility that by designing the electric field distribution, we can produce thinner fibers and more concentrated collection mats at a high production rate. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2020763

Turbulent air flow field and fiber whipping motion in the melt blowing process / Sheng Xie in Industrial & engineering chemistry research, Vol. 51 N° 14 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5346-5352 Titre : Turbulent air flow field and fiber whipping motion in the melt blowing process : Experimental study Type de document : texte imprimé Auteurs : Sheng Xie, Auteur ; Yongchun Zeng, Auteur Année de publication : 2012 Article en page(s) : pp. 5346-5352 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Flow  field  Air  flow Résumé : Electrospinning and melt blowing are the most commonly used processes for producing microfibrous nonwoven materials. A whipping motion during electrospinning has been observed by several researchers. However, much less work has been done on the fiber whipping dynamics in the melt blowing process. In this study, a hot-wire anemometer was used to measure the turbulent air flow field below a single-orifice melt-blowing slot die. The characteristics of the mean velocity, mean temperature, and fluctuating velocity were obtained. Then, a high-speed camera was used to record the motion of a fiber below the die. The fiber whipping path was observed, and the amplitude and frequency of the whipping were obtained. It was found that the turbulent fluctuations are related to the fiber motion in the melt-blowing process. This work examines the physics of turbulent melt-blowing jets and the fiber whipping occurring during melt blowing using an experimental approach. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25783444 [article] Turbulent air flow field and fiber whipping motion in the melt blowing process : Experimental study [texte imprimé] / Sheng Xie, Auteur ; Yongchun Zeng, Auteur . - 2012 . - pp. 5346-5352. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5346-5352 Mots-clés : Flow  field  Air  flow Résumé : Electrospinning and melt blowing are the most commonly used processes for producing microfibrous nonwoven materials. A whipping motion during electrospinning has been observed by several researchers. However, much less work has been done on the fiber whipping dynamics in the melt blowing process. In this study, a hot-wire anemometer was used to measure the turbulent air flow field below a single-orifice melt-blowing slot die. The characteristics of the mean velocity, mean temperature, and fluctuating velocity were obtained. Then, a high-speed camera was used to record the motion of a fiber below the die. The fiber whipping path was observed, and the amplitude and frequency of the whipping were obtained. It was found that the turbulent fluctuations are related to the fiber motion in the melt-blowing process. This work examines the physics of turbulent melt-blowing jets and the fiber whipping occurring during melt blowing using an experimental approach. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25783444