TY - JOUR
T1 - Multifunctional bionanocomposite films of poly(lactic acid), cellulose nanocrystals and silver nanoparticles
AU - Fortunati, E.
AU - Armentano, I.
AU - Zhou, Q.
AU - Iannoni, A.
AU - Saino, E.
AU - Visai, L.
AU - Berglund, L. A.
AU - Kenny, J. M.
PY - 2012/1/15
Y1 - 2012/1/15
N2 - Nanocomposite films were prepared by the addition of cellulose nanocrystals (CNCs) eventually surfactant modified (s-CNC) and silver (Ag) nanoparticles in the polylactic acid (PLA) matrix using melt extrusion followed by a film formation process. Multifunctional composite materials were investigated in terms of morphological, mechanical, thermal and antibacterial response. The nanocomposite films maintained the transparency properties of the PLA matrix. Thermal analysis showed increased values of crystallinity in the nanocomposites, more evident in the s-CNC based formulations that had the highest tensile Young modulus. The presence of surfactant favoured the dispersion of cellulose nanocrystals in the polymer matrix and the nucleation effect was remarkably enhanced. Moreover, an antibacterial activity against Staphylococcus aureus and Escherichia coli cells was detected for ternary systems, suggesting that these novel nanocomposites may offer good perspectives for food packaging applications which require an antibacterial effect constant over time.
AB - Nanocomposite films were prepared by the addition of cellulose nanocrystals (CNCs) eventually surfactant modified (s-CNC) and silver (Ag) nanoparticles in the polylactic acid (PLA) matrix using melt extrusion followed by a film formation process. Multifunctional composite materials were investigated in terms of morphological, mechanical, thermal and antibacterial response. The nanocomposite films maintained the transparency properties of the PLA matrix. Thermal analysis showed increased values of crystallinity in the nanocomposites, more evident in the s-CNC based formulations that had the highest tensile Young modulus. The presence of surfactant favoured the dispersion of cellulose nanocrystals in the polymer matrix and the nucleation effect was remarkably enhanced. Moreover, an antibacterial activity against Staphylococcus aureus and Escherichia coli cells was detected for ternary systems, suggesting that these novel nanocomposites may offer good perspectives for food packaging applications which require an antibacterial effect constant over time.
KW - Antibacterial response
KW - Nanocomposite
KW - Nanocrystalline cellulose
KW - Polylactic acid
UR - http://www.scopus.com/inward/record.url?scp=81255127316&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=81255127316&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2011.09.066
DO - 10.1016/j.carbpol.2011.09.066
M3 - Article
AN - SCOPUS:81255127316
VL - 87
SP - 1596
EP - 1605
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
SN - 0144-8617
IS - 2
ER -