TY - JOUR
T1 - Composite films of regenerate cellulose with chitosan and polyvinyl alcohol
T2 - Evaluation of water adsorption, mechanical and optical properties
AU - Cazón, Patricia
AU - Vázquez, Manuel
AU - Velazquez, Gonzalo
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The aim of this study was to develop composite films from cellulose, chitosan and polyvinyl alcohol to obtain environmentally friendly materials. Toughness, burst strength, distance to burst and water adsorption properties were measured and analysed as a function of cellulose (3–5%), chitosan (0–1%) and polyvinyl alcohol (0–4%) contents. Polynomial models were obtained. Light-barrier properties, transparency, morphology, structural and thermal analyses were assessed. Results showed that chitosan and polyvinyl alcohol enhanced the mechanical properties of cellulose-based films. Toughness values ranged from 0.47 to 8.01 MJ/m3, burst strength values ranged from 929 to 6291 g, distance to burst ranged from 1.25 to 2.52 mm and water adsorption values ranged from 52.30 to 143.56%. Cellulose and chitosan improved the UV light protection effect of the films. However, PVA increased the transmittance meanwhile improved the film transparency. FT-IR and DSC showed an interaction between the components of the films. Results showed that it is feasible to obtain cellulose-chitosan-polyvinyl alcohol composite films with improved mechanical properties, high capacity to adsorb water, good barrier properties against UV radiations and adequate transparency value. These properties could be useful for potential packaging applications in the food industry or as a partial alternative to synthetic films.
AB - The aim of this study was to develop composite films from cellulose, chitosan and polyvinyl alcohol to obtain environmentally friendly materials. Toughness, burst strength, distance to burst and water adsorption properties were measured and analysed as a function of cellulose (3–5%), chitosan (0–1%) and polyvinyl alcohol (0–4%) contents. Polynomial models were obtained. Light-barrier properties, transparency, morphology, structural and thermal analyses were assessed. Results showed that chitosan and polyvinyl alcohol enhanced the mechanical properties of cellulose-based films. Toughness values ranged from 0.47 to 8.01 MJ/m3, burst strength values ranged from 929 to 6291 g, distance to burst ranged from 1.25 to 2.52 mm and water adsorption values ranged from 52.30 to 143.56%. Cellulose and chitosan improved the UV light protection effect of the films. However, PVA increased the transmittance meanwhile improved the film transparency. FT-IR and DSC showed an interaction between the components of the films. Results showed that it is feasible to obtain cellulose-chitosan-polyvinyl alcohol composite films with improved mechanical properties, high capacity to adsorb water, good barrier properties against UV radiations and adequate transparency value. These properties could be useful for potential packaging applications in the food industry or as a partial alternative to synthetic films.
KW - Puncture test
KW - Regenerated cellulose
KW - Water adsorption
UR - http://www.scopus.com/inward/record.url?scp=85047604411&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2018.05.148
DO - 10.1016/j.ijbiomac.2018.05.148
M3 - Artículo
C2 - 29792961
SN - 0141-8130
VL - 117
SP - 235
EP - 246
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -