Effect of Plasticizers on the Moisture Migration Behavior of Low-Amylose Starch Films during Drying

被引：36

作者：

Adhikari, B. ^{[1
]}

Chaudhary, D. S. ^{[2
]}

Clerfeuille, E. ^{[3
]}

机构：

[1] Univ Ballarat, Sch Sci & Engn, Ballarat, Vic 3353, Australia

[2] Curtin Univ Technol, Dept Chem Engn, Perth, WA, Australia

[3] Inst Polytech LaSalle Beauvais, Beauvais, France

来源：

DRYING TECHNOLOGY | 2010年 / 28卷 / 04期

关键词：

Bioplastics; Effective moisture diffusivity; Moisture migration flux; Plasticizers; Starch; THERMOPLASTIC STARCH; SORBITOL FILMS; GLYCEROL; WATER; ANTIPLASTICIZATION; GELATINIZATION; BLENDS; CRYSTALLINITY; SCATTERING; POLYMERS;

D O I：

10.1080/07373931003613593

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We report the synergistic and competitive interactions between multiple plasticizers in plasticized low-amylose starch that result in either enhanced or reduced water migration fluxes and effective moisture diffusivities. The starch was plasticized using glycerol and xylitol either individually or in 1:1 combination. The water migration fluxes and moisture diffusivities were higher in xylitol plasticized films compared to the glycerol plasticized ones. For low plasticizer concentrations, the presence of both the plasticizers competitively reduced the effective moisture diffusivities and moisture migration fluxes due to antiplasticization. However, at higher plasticizer contents (at and above 15wt%), the presence of multiple plasticizers enhanced the moisture migration fluxes and effective moisture diffusivities due to synergistic plasticization. The moisture migration fluxes and effective moisture diffusivities exhibited both moisture and plasticizer concentration dependence and the former was found to be stronger than the latter. These findings can be used for designing and controlling the vapor barrier properties of starch-based bioplastics during drying and formulation phase.

引用

页码：468 / 480

页数：13

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