Tunable green oxygen barrier through layer-by-layer self-assembly of chitosan and cellulose nanocrystals

被引：89

作者：

Li, Fei ^{[1
]}

Biagioni, Paolo ^{[2
,3
]}

Finazzi, Marco ^{[2
,3
]}

Tavazzi, Silvia ^{[4
]}

Piergiovanni, Luciano ^{[1
]}

机构：

[1] Univ Milan, Packaging Div, DeFENS Dept Food Environm & Nutr Sci, I-20133 Milan, Italy

[2] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[3] Politecn Milan, CNISM, I-20133 Milan, Italy

[4] Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy

来源：

CARBOHYDRATE POLYMERS | 2013年 / 92卷 / 02期

关键词：

Oxygen barrier; Flexible packaging; Layer-by-layer coating; Cellulose nanocrystals; Chitosan; Packaging sustainability; GAS BARRIER; THIN; NANOCOMPOSITES; CHITIN; POLYSACCHARIDES; DISPERSION; POLYMERS; COATINGS; FILMS;

D O I：

10.1016/j.carbpol.2012.11.091

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

We address the oxygen-barrier properties of a nanocomposite created by layer-by-layer assembly of two biopolymers, chitosan (CS) and cellulose, in nanocrystals form (CNs), on an amorphous PET substrate. We systematically investigated the oxygen permeability, morphology, and thickness of the nanocomposite grown under two different pH combinations and with different number of deposition cycles, up to 30 bilayers. Noticeably, the thickness of each deposited bilayer can be largely tuned by the pH value of the solution, from similar to 7 up to similar to 26 nm in the tested conditions. By our analysis, it is reliably concluded that such CS/CNs nanocomposite holds promises for gas barrier applications in food and drug packaging as a clear coating on plastic films and tridimensional objects, improving performance and sustainability of the final packages. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：2128 / 2134

页数：7

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