Influence of Drying Techniques on the Characteristics of Chitosan and the Quality of Biopolymer Films

In this work, spouted bed and tray-drying techniques were employed at different drying air temperatures to produce dried chitosan, and the chitosan powder was used to produce biofilms. The products obtained from each drying technique were compared in relation to quality aspects (molecular weight, li...

Full description

Saved in:
Bibliographic Details
Published in:Drying technology 2011-01, Vol.29 (15), p.1784-1791
Main Authors: Dotto, Guilherme Luiz, de Souza, Vanderlei Constantino, de Moura, Jaqueline Motta, de Moura, Catarina Motta, de Almeida Pinto, Luiz Antonio
Format: Article
Language:English
Subjects:
Alterations
Biofilms
Biopolymers
Browning
Chitosan
Drying
Drying agents
Drying technique
Elongation
Mechanical properties
Molecular weight
Permeability
Spouted bed
Tensile strength
Water vapor permeability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, spouted bed and tray-drying techniques were employed at different drying air temperatures to produce dried chitosan, and the chitosan powder was used to produce biofilms. The products obtained from each drying technique were compared in relation to quality aspects (molecular weight, lightness, and hue angle). The results found for chitosan in spouted bed drying (90°C) showed lower alteration and best quality aspects in relation to the chitosan powder. However, in tray drying under the best condition (60°C) the chitosan molecular weight increased about 50% in relation to the initial value and browning was observed. The biofilms produced from chitosan dried in the spouted bed showed the best mechanical properties (tensile strength of 42 MPa and elongation of 29%) and lower water vapor permeability (3.95 g mm m −2  kPa −1  day −1 ).
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2011.602812