TY - JOUR
T1 - Characterization of biodegradable films from the extracellular polysaccharide produced by Pseudomonas oleovorans grown on glycerol by product
AU - Alves, Vítor
AU - Ferreira, Rute A. S.
AU - Costa, Nuno
AU - Freitas, Filomena
AU - Reis, Maria D'ascensão Carvalho Fernandes Miranda
AU - Coelhoso, Isabel Maria Rola
N1 - Sem PDF.
The authors acknowledge Fabrica Torrejana de Biocom-bustiveis SA, Portugal, for supplying the glycerol byproduct from the biodiesel production, and Prof. Maria Joao Melo from REQUIMTE/CQFB - Departamento de Quimica, FCT/UNL for helping with FTIR analysis. The work was financially supported by 73100 Lda, under the project "Production of biopolymers from glycerol".
PY - 2011/2
Y1 - 2011/2
N2 - In this work, the film-forming capacity of the new microbial exopolysaccharide (EPS) composed by sugars and acyl groups, produced by Pseudomonas oleovorans NRRL B-14682, was studied. The films were transparent and quite flexible and tough when handled, but showed to be stiff under tensile and puncture tests. They presented a high water vapour permeability but a quite low permeability to carbon dioxide, which are typical of hydrophilic polysaccharide films. Furthermore, they showed good stability in contact with liquid water, after auto-crosslinking reactions at low pH, upon or after drying. Preliminary biodegradability tests indicated an easy biological degradation when exposed to soil microorganisms. The results obtained are rather promising regarding the film-forming capacity of the new EPS, as they were obtained only with the biopolymer itself. The films formulation may be complemented with additives (e.g. plasticizers, emulsifiers, nanocomposites), to design films for specific applications. (C) 2010 Elsevier Ltd. All rights reserved.
AB - In this work, the film-forming capacity of the new microbial exopolysaccharide (EPS) composed by sugars and acyl groups, produced by Pseudomonas oleovorans NRRL B-14682, was studied. The films were transparent and quite flexible and tough when handled, but showed to be stiff under tensile and puncture tests. They presented a high water vapour permeability but a quite low permeability to carbon dioxide, which are typical of hydrophilic polysaccharide films. Furthermore, they showed good stability in contact with liquid water, after auto-crosslinking reactions at low pH, upon or after drying. Preliminary biodegradability tests indicated an easy biological degradation when exposed to soil microorganisms. The results obtained are rather promising regarding the film-forming capacity of the new EPS, as they were obtained only with the biopolymer itself. The films formulation may be complemented with additives (e.g. plasticizers, emulsifiers, nanocomposites), to design films for specific applications. (C) 2010 Elsevier Ltd. All rights reserved.
KW - Biodegradable films
KW - Barrier properties
KW - Microbial polysaccharide
KW - Glycerol by-product
KW - Barrier properties
KW - Biodegradable films
KW - Glycerol by-product
KW - Microbial polysaccharide
U2 - 10.1016/j.carbpol.2010.10.010
DO - 10.1016/j.carbpol.2010.10.010
M3 - Article
SN - 0144-8617
VL - 83
SP - 1582
EP - 1590
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
IS - 4
ER -