Rheological Characterization of Lyocell Solutions - Couverture souple

Patel, Viralkumar; Gupta, Amit; Parthasarthy, Vijay

 
9783330329881: Rheological Characterization of Lyocell Solutions
Couverture souple
ISBN 10 : 3330329882 ISBN 13 : 9783330329881
Editeur : LAP LAMBERT Academic Publishing, 2017

Synopsis

The primary goals of the study were to prepare lyocell solutions from different wood pulps. An individual specific Protocol was developed for lyocell solution preparation from different cellulose sources. The cellulose sources included bleached hardwood and bleached softwood pulps. Rheological measurements were used to characterize the behaviour of lyocell solutions, i.e. cellulose dissolved in N-methyl morpholine N-oxide (NMMO) monohydrate. Complex viscosities were measured and influence of parameters such as cellulose source, concentration, DP (function of molecular weight) and temperature were studied. The dominance of viscous behaviour, G' values, over elastic behaviour, G" values, is affected by pulp type, concentration, molecular weight and degrees of polymerization (DP). At lower concentrations and degrees of polymerization, dissolving pulp solutions show viscous, inelastic behaviour at low frequencies. At higher concentration and DP, dissolving pulp solutions are more elastic at higher frequencies.

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Présentation de l'éditeur

The primary goals of the study were to prepare lyocell solutions from different wood pulps. An individual specific Protocol was developed for lyocell solution preparation from different cellulose sources. The cellulose sources included bleached hardwood and bleached softwood pulps. Rheological measurements were used to characterize the behaviour of lyocell solutions, i.e. cellulose dissolved in N-methyl morpholine N-oxide (NMMO) monohydrate. Complex viscosities were measured and influence of parameters such as cellulose source, concentration, DP (function of molecular weight) and temperature were studied. The dominance of viscous behaviour, G' values, over elastic behaviour, G" values, is affected by pulp type, concentration, molecular weight and degrees of polymerization (DP). At lower concentrations and degrees of polymerization, dissolving pulp solutions show viscous, inelastic behaviour at low frequencies. At higher concentration and DP, dissolving pulp solutions are more elastic at higher frequencies.

Biographie de l'auteur

Mr. Viralkumar was born in Dabhou, India. He received Postgraduate Diploma in petroleum engineering from Teesside University, UK and M.Tech. in process design engineering from University of Petroleum and Energy Studies, India, in 2014 and 2017 respectively. In March 2017, Viralkumar joined Pulp and Fiber Innovation Center, Aditya Birla Group.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2017
Langue
anglais
ISBN 10 
3330329882
ISBN 13 
9783330329881
Reliure
Broché
Nombre de pages
64
Coordonnées du fabricant
non disponible
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