TY - JOUR
T1 - The effect of polymer/ plasticiser ratio in film forming solutions on the properties of chitosan films
AU - Fundo, Joana F.
AU - Galvis-Sanchez, Andrea C.
AU - Delgadillo, Ivonne
AU - Silva, Cristina L. M.
AU - Quintas, Mafalda A. C.
N1 - Funding Information:
Authors Joana F. Fundo, Andrea C. Galvis-Sánchez and Mafalda A. C. Quintas acknowledge FCT for research grants SFRH/ BD / 62176 / 2009, SFRH/BPD/37890/2007 and SFRH / BPD / 41715 / 2007, respectively.
Funding Information:
This work was supported by National Funds from FCT – Fundação para a Ciência e a Tecnologia, through project PEst-OE/EQB/LA0016/2011.
Publisher Copyright:
© 2015, Springer Science+Business Media New York.
PY - 2015/9/27
Y1 - 2015/9/27
N2 - In this work physical-chemical properties of chitosan/ glycerol film forming solutions (FFS) and the resulting films were analysed. Solutions were prepared using different concentrations of plasticising agent (glycerol) and chitosan. Films were produced by solvent casting and equilibrated in a controlled atmosphere. FFS water activity and rheological behaviour were determined. Films water content, solubility, water vapour and oxygen permeabilities, thickness, and mechanical and thermal properties were determined. Fourier transform infrared (FTIR) spectroscopy was also used to study the chitosan/glycerol interactions. Results demonstrate that FFS chitosan concentration influenced solutions consistency coefficient and this was related with differences in films water retention and structure. Plasticiser addition led to an increase in films moisture content, solubility and water vapour permeability, water affinity and structural changes. Films thermo-mechanical properties are significantly affected by both chitosan and glycerol addition. FTIR experiments confirm these results. This work highlights the importance of glycerol and water plasticisation in films properties.
AB - In this work physical-chemical properties of chitosan/ glycerol film forming solutions (FFS) and the resulting films were analysed. Solutions were prepared using different concentrations of plasticising agent (glycerol) and chitosan. Films were produced by solvent casting and equilibrated in a controlled atmosphere. FFS water activity and rheological behaviour were determined. Films water content, solubility, water vapour and oxygen permeabilities, thickness, and mechanical and thermal properties were determined. Fourier transform infrared (FTIR) spectroscopy was also used to study the chitosan/glycerol interactions. Results demonstrate that FFS chitosan concentration influenced solutions consistency coefficient and this was related with differences in films water retention and structure. Plasticiser addition led to an increase in films moisture content, solubility and water vapour permeability, water affinity and structural changes. Films thermo-mechanical properties are significantly affected by both chitosan and glycerol addition. FTIR experiments confirm these results. This work highlights the importance of glycerol and water plasticisation in films properties.
KW - Chitosan/ glycerol edible films
KW - Film forming solutions
KW - Thermo-mechanical properties
KW - Water activity
KW - Water content
UR - http://www.scopus.com/inward/record.url?scp=84938954591&partnerID=8YFLogxK
U2 - 10.1007/s11483-015-9394-3
DO - 10.1007/s11483-015-9394-3
M3 - Article
AN - SCOPUS:84938954591
SN - 1557-1858
VL - 10
SP - 324
EP - 333
JO - Food Biophysics
JF - Food Biophysics
IS - 3
ER -