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Comparative study of the triboelectric charging behavior of powders using a nonintrusive approach / Jin W. Kwek in Industrial & engineering chemistry research, Vol. 51 N° 50 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp. 16488-16494 Titre : Comparative study of the triboelectric charging behavior of powders using a nonintrusive approach Type de document : texte imprimé Auteurs : Jin W. Kwek, Auteur ; M. Jeyabalasingam, Auteur ; Wai K. Ng, Auteur Année de publication : 2013 Article en page(s) : pp. 16488-16494 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Powder  Comparative  study Résumé : Powder processing operations such as blending or pneumatic transport can potentially induce triboelectric charging with subsequent agglomeration. Traditionally the charging behavior is investigated using a Faraday cage. In this paper, an alternative nonintrusive probe connected to a voltmeter for comparative triboelectric charging studies of sieved pharmaceutically relevant materials such as α-lactose monohydrate (ALM) and adipic acid (AA) on acetal surfaces under controlled environmental conditions was explored. The probe was verified using standard voltages with determination in the positioning limits for effective measurements between probe and surface. Results obtained with the probe were found to be in good agreement with the Faraday cage method. A greater incidence of particle-to-wall adhesions in smaller sized AA particles led to a reduction in initial surface specific potential while the higher quantity of fines in the ALM larger sieve fractions could be the major contributing factor in the reduced surface specific potential. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26732177 [article] Comparative study of the triboelectric charging behavior of powders using a nonintrusive approach [texte imprimé] / Jin W. Kwek, Auteur ; M. Jeyabalasingam, Auteur ; Wai K. Ng, Auteur . - 2013 . - pp. 16488-16494. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp. 16488-16494 Mots-clés : Powder  Comparative  study Résumé : Powder processing operations such as blending or pneumatic transport can potentially induce triboelectric charging with subsequent agglomeration. Traditionally the charging behavior is investigated using a Faraday cage. In this paper, an alternative nonintrusive probe connected to a voltmeter for comparative triboelectric charging studies of sieved pharmaceutically relevant materials such as α-lactose monohydrate (ALM) and adipic acid (AA) on acetal surfaces under controlled environmental conditions was explored. The probe was verified using standard voltages with determination in the positioning limits for effective measurements between probe and surface. Results obtained with the probe were found to be in good agreement with the Faraday cage method. A greater incidence of particle-to-wall adhesions in smaller sized AA particles led to a reduction in initial surface specific potential while the higher quantity of fines in the ALM larger sieve fractions could be the major contributing factor in the reduced surface specific potential. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26732177