Films of starch and poly(butylene adipate co-terephthalate) added of soybean oil (SO) and Tween 80

被引:86
作者
Herrera Brandelero, Renata P. [1 ]
Grossmann, Maria Victoria [1 ]
Yamashita, Fabio [1 ]
机构
[1] Univ Estadual Londrina, Dept Food Sci & Technol, BR-86051990 Londrina, PR, Brazil
关键词
Biodegradable films; Extrusion blow molding; Blends; Surfactant; Lipids; BARRIER PROPERTIES; MECHANICAL-PROPERTIES; WATER BARRIER; THERMOPLASTIC STARCH; PHYSICAL-PROPERTIES; PLASTICIZED STARCH; TERNARY BLENDS; SURFACTANTS; POLYESTERS; BINARY;
D O I
10.1016/j.carbpol.2012.07.015
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Starch extruded in the presence of a plasticizer results in a material called thermoplastic starch (TPS). TPS mixed with poly(butylene adipate co-terephthalate) (PBAT), soybean oil (SO), and surfactant may result in films with improved mechanical properties due to greater hydrophobicity and compatibility among the polymers. This study characterized films produced from blends containing 65% TPS and 35% PBAT with SO added as compatibilizer. The Tween 80 was added to prevention of phase separation. The elongation and resistance were greater in the films with SO. The infrared spectra confirmed an increase in ester groups bonded to the PBAT and the presence of groups bonded to the starch ring, indicating TPS-SO and PBAT-SO interactions. The micrographs suggest that the films with SO were more homogenous. Thus, SO is considered to be a good compatibilizer for blends of TPS and PRAT. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1452 / 1460
页数:9
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