Comparative study of processing methods for starch/gelatin films

被引：126

作者：

Fakhouri, Farayde M. ^{[1
,3
]}

Costa, Daryne ^{[2
]}

Yamashita, Fabio ^{[3
]}

Martelli, Silvia M. ^{[4
]}

Jesus, Rodolfo C. ^{[1
]}

Alganer, Katlen ^{[1
]}

Collares-Queiroz, Fernanda P. ^{[5
]}

Innocentini-Mei, Lucia H. ^{[1
]}

机构：

[1] Univ Estadual Campinas, Sch Chem Engn, Dept Polymer Technol, UNICAMP, BR-13083970 Campinas, SP, Brazil

[2] Fed Inst Educ Sci & Technol, BR-78050000 Cuiaba, MT, Brazil

[3] Univ Estadual Londrina, Dept Food Sci & Technol, UEL, BR-86051990 Londrina, PR, Brazil

[4] UFGD, Fed Univ Grande Dourados, Fac Engn, BR-79804070 Dourados, MS, Brazil

[5] Univ Estadual Campinas, Sch Chem Engn, UNICAMP, Dept Thermofluid Dynam, BR-13083970 Campinas, SP, Brazil

来源：

CARBOHYDRATE POLYMERS | 2013年 / 95卷 / 02期

关键词：

Starch; Gelatin; Process; Casting; Extrusion; Blow molding; VAPOR BARRIER PROPERTIES; GELATIN COMPOSITE FILMS; THERMOPLASTIC STARCH; PHYSICAL-PROPERTIES; CASSAVA STARCH; MECHANICAL-PROPERTIES; FUNCTIONAL-PROPERTIES; EDIBLE FILMS; MAIZE STARCH; BLENDS;

D O I：

10.1016/j.carbpol.2013.03.027

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this work, the influence of processing methods on the properties of starch/gelatin films plasticized with glycerol and sorbitol is reported. Four different processing techniques: casting; pressing; pressing followed by blowing and extrusion followed by blowing were evaluated. Bioplastics prepared by casting were homogeneous and transparent with lower opacity and water vapor permeability (WVP) values when compared to films prepared by other techniques. Among the cast films studied, those with 3% lipophilic starch, in 1:1 proportions and plasticized with sorbitol, showed lower WVP values and higher tensile strength (TS). Films obtained by pressing and blowing showed little expansion during blow, had cracks in the surface, low TS and higher WVP. These films were the only samples to show crystallinity as determined by thermal analysis and X-ray diffraction. In conclusion, different processing techniques have significantly affected the properties of these films. (C) Crown Copyright 2013 Published by Elsevier Ltd. All rights reserved.

引用

页码：681 / 689

页数：9

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