Effect of nanoclay-type and PLA optical purity on the characteristics of PLA-based nanocomposite films

被引：126

作者：

Molinaro, Stefano ^{[1
]}

Romero, Malco Cruz ^{[2
]}

Boaro, Marta ^{[3
]}

Sensidoni, Alessandro ^{[1
]}

Lagazio, Corrado ^{[4
]}

Morris, Michael ^{[5
]}

Kerry, Joe ^{[2
]}

机构：

[1] Univ Udine, Dept Food Sci, I-33100 Udine, Italy

[2] Natl Univ Ireland Univ Coll Cork, Sch Food & Nutr Sci, Food Packaging Grp, Cork, Ireland

[3] Univ Udine, Dept Chem Phys & Environm, I-33100 Udine, Italy

[4] Univ Genoa, Dept Econ, Genoa, Italy

[5] Natl Univ Ireland Univ Coll Cork, Dept Chem, Cork, Ireland

来源：

JOURNAL OF FOOD ENGINEERING | 2013年 / 117卷 / 01期

关键词：

Poly(lactic) acid; Montmorillonite; Nanocomposites; Renewable resources; Packaging; Structural properties; MELTING BEHAVIOR; LAYERED-SILICATE; POLYLACTIDE PLA; LACTIC-ACID; FOOD; DEGRADATION; PRODUCTS; MONTMORILLONITE; POLY(L-LACTIDE); TECHNOLOGIES;

D O I：

10.1016/j.jfoodeng.2013.01.021

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Nanocomposite films were produced by blending semicrystalline PLA with different types of OMMTs using extrusion. In order to study their effect on optical, structural, and thermal properties, they were added at a fixed nominal concentration of 5% w/w and compared with pure PLA films. The XRD measurements showed that the incorporation of small amounts of nanoclays resulted in a formation of nanocomposites, with the C30B demonstrating the greatest compatibility with PLA. An increase in UV barrier properties was observed in nanocomposites, with Closite (R) C20A showing the best performance. The content of L-isomer in PLA significantly affected the thermal properties of the films, with a decrease in T-m of about 14 degrees C and increase in T-c of about 20 degrees C when the matrix, possessing a higher D-isomer content, was used. FTIR results showed a strong interaction between the nanoclays and the two different PLA matrices, due to the appearance of new peaks in nanocomposites films at around 520 and 627 cm(-1). (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：113 / 123

页数：11

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