Multifunctional bionanocomposite films of poly(lactic acid), cellulose nanocrystals and silver nanoparticles

被引：438

作者：

Fortunati, E. ^{[1
]}

Armentano, I. ^{[1
]}

Zhou, Q. ^{[3
,4
]}

Iannoni, A. ^{[1
]}

Saino, E. ^{[5
,6
]}

Visai, L. ^{[5
,6
,7
,8
]}

Berglund, L. A. ^{[4
]}

Kenny, J. M. ^{[1
,2
]}

机构：

[1] Univ Perugia, UdR INSTM, Mat Engn Ctr, I-05100 Terni, Italy

[2] CSIC, Inst Polymer Sci & Technol, E-28006 Madrid, Spain

[3] Royal Inst Technol, Sch Biotechnol, SE-10691 Stockholm, Sweden

[4] Royal Inst Technol, Wallenberg Wood Sci Ctr, SE-10044 Stockholm, Sweden

[5] Med Sect, Dept Biochem, I-27100 Pavia, Italy

[6] Ctr Tissue Engn CIT, I-27100 Pavia, Italy

[7] Salvatore Maugeri Fdn IRCCS, I-27100 Pavia, Italy

[8] Int Ctr Studies & Res Biomed ICB, L-2015 Luxembourg, Luxembourg

来源：

CARBOHYDRATE POLYMERS | 2012年 / 87卷 / 02期

关键词：

Polylactic acid; Nanocomposite; Nanocrystalline cellulose; Antibacterial response; MICROCRYSTALLINE CELLULOSE; WHISKERS; BEHAVIOR; NANOCOMPOSITES; SUSPENSIONS;

D O I：

10.1016/j.carbpol.2011.09.066

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1596 / 1605

页数：10

共 40 条

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