Repositório Institucional da Universidade de Aveiro > Departamento de Química > DQ - Artigos >
 Preparation and characterization of bacterial cellulose membranes with tailored surface and barrier properties
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/5146

title: Preparation and characterization of bacterial cellulose membranes with tailored surface and barrier properties
authors: Tomé, Liliana C.
Brandão, Lúcia
Mendes, Adélio M.
Silvestre, Armando J. D.
Neto, Carlos Pascoal
Gandini, Alessandro
Freire, Carmen S. R.
Marrucho, Isabel M.
keywords: Bacterial cellulose
Heterogeneous esterification
Hexanoic acid
Surface energy
Water vapor
Gas permeation
issue date: 2010
publisher: Springer Verlag
abstract: Modified bacterial cellulose membranes with tailored properties, regarding their surface and barrier properties were prepared by controlled heterogeneous esterification with hexanoyl chloride. The characterization of the esterified bacterial cellulose membranes was performed by FTIR spectroscopy, elemental analyses, X-ray diffraction, thermogravimetry and contact angle measurements. The esterified membranes showed an increased hydrophobic surface character, while preserving the bulk structure of the pristine material. The evaluation of the barrier properties was carried out through permeability measurements towards water vapor at different relative humidities and by the permeability towards humidified carbon dioxide, oxygen and nitrogen using the time-lag method. A decrease of roughly 50% in both water and gas permeation through bacterial cellulose membranes was observed after heterogeneous esterification. The bacterial cellulose membranes prepared are a good and interesting example of the development of bio-based materials with promising applications in the packaging industry.
URI: http://hdl.handle.net/10773/5146
ISSN: 0969-0239
publisher version/DOI: http://dx.doi.org/10.1007/s10570-010-9457-z
source: Cellulose
appears in collectionsDQ - Artigos

files in this item

file description sizeformat
Cellulose_2010_17_1203_1211.pdf424.92 kBAdobe PDFview/open
Restrict Access. You can Request a copy!

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! RCAAP OpenAIRE DeGóis
ria-repositorio@ua.pt - Copyright ©   Universidade de Aveiro - RIA Statistics - Powered by MIT's DSpace software, Version 1.6.2