Physical, thermal, morphological, and tensile properties of cornstarch-based films as affected by different plasticizers

被引:79
作者
Ibrahim, M. I. J. [1 ,2 ]
Sapuan, S. M. [1 ,3 ]
Zainudin, E. S. [1 ]
Zuhri, M. Y. M. [1 ]
机构
[1] Univ Putra Malaysia, Adv Engn Mat & Composites Res Ctr, Dept Mech & Mfg Engn, Serdang, Selangor, Malaysia
[2] Sabha Univ, Dept Mech & Mfg Engn, Sabha, Libya
[3] Univ Putra Malaysia, Inst Trop Forestry & Forest Prod INTROP, Biocomposite Technol, Serdang, Selangor, Malaysia
关键词
Cornstarch; plasticizers; biodegradable film; physical properties; thermal properties; tensile properties; MECHANICAL-PROPERTIES; BARRIER PROPERTIES; EDIBLE FILMS; BIODEGRADABLE FILMS; STARCH FILMS; CORN STARCH; SCANNING CALORIMETRY; MOISTURE-CONTENT; POLYMER BLENDS; GLYCEROL;
D O I
10.1080/10942912.2019.1618324
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The current research was designed to determine the effect of various concentrations (0%, 25%, 40%, and 55%) of fructose, sorbitol and urea plasticizers in cornstarch-based films, with the aim of achieving a new polymer for the application of biodegradable materials. Casting technique was used to prepare the films. The physical, morphological, thermal, and mechanical properties of produced films were evaluated. The results showed that the thickness, moisture content, and water solubility increased with the addition of plasticizer concentration. While the glass transition temperatures showed an insignificant effect with high plasticizer content. Regardless of plasticizer sort, the tensile stress and Young's modulus of plasticized films decreased as the plasticizer concentrations were raised beyond 25%. Likewise, the relative crystallinity decreased by increasing the plasticizer content from 0% to 25%, but it began to grow once the concentration increased above 25%. The fructose-plasticized films presented consistent and more coherent surfaces compared to sorbitol and urea counterparts, which appeared less homogeneous surfaces with microcracks. In summary, the plasticizers types and concentrations are affected significantly on the properties and performance of the cornstarch-based film. Film plasticized with 25% fructose appeared the finest set of features and achieved the highest mechanical performance among the plasticizers used in this study.
引用
收藏
页码:925 / 941
页数:17
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