Preparation and properties of films cast from mixtures of poly(vinyl alcohol) and submicron particles prepared from amylose-palmitic acid inclusion complexes

被引:7
作者
Fanta, George F. [1 ,2 ]
Selling, Gordon W. [1 ,2 ]
Felker, Frederick C. [3 ]
Kenar, James A. [3 ]
机构
[1] ARS, Plant Polymer Res Unit, USDA, Natl Ctr Agr Utilizat Res, Peoria, IL 61604 USA
[2] ARS, Funct Foods Res Unit, USDA, Natl Ctr Agr Utilizat Res, Peoria, IL 61604 USA
[3] ARS, Funct Foods Res Units, USDA, Natl Ctr Agr Utilizat Res, Peoria, IL 61604 USA
关键词
Starch; Amylose; Poly(vinyl alcohol); PVOH; Palmitic acid; Inclusion complex; STARCH NANOCRYSTALS;
D O I
10.1016/j.carbpol.2014.12.043
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The use of starch in polymer composites for film production has been studied for increasing biodegradability, improving film properties and reducing cost. In this study, submicron particles were prepared from amylose-sodium palmitate complexes both by rapidly cooling jet-cooked starch-palmitic acid mixtures and by acidifying solutions of starch-sodium palmitate complexes. Films were cast containing poly(vinyl alcohol) (PVOH) with up to 50% starch particles. Tensile strength decreased and Young's modulus increased with starch concentration, but percent elongations remained similar to controls regardless of preparation method or starch content. Microscopy showed particulate starch distribution in films made with rapidly cooled starch-palmitic acid particles but smooth, diffuse starch staining with acidified sodium palmitate complexes. The mild effects on tensile properties suggest that submicron starch particles prepared from amylose-palmitic acid complexes provide a useful, commercially viable approach for PVOH film modification. Published by Elsevier Ltd.
引用
收藏
页码:420 / 427
页数:8
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