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  • Title: Structural properties of propionylated starch-based nanocomposites containing different amylose contents.
    Author: Zhu J, Zhang S, Pu H, Chen X, Zou SY, Li L, Wang Q.
    Journal: Int J Biol Macromol; 2020 Apr 15; 149():532-540. PubMed ID: 32004606.
    Abstract:
    This research displayed the structures and thermomechanical feature of starch-based nanocomposites as induced by interaction between propionylated amylose/amylopectin and nanofiller (organically modified montmorillonite). Propionylated amylose incorporated with nanofiller caused some phase separation within the nanocomposites. By contrast, highly-branched propionylated amylopectin favored nanofiller dispersion and disrupted its crystalline structure, and further facilitated certain exfoliated or intercalated structures. Based on these structures, propionylated amylose-rich nanocomposites showed enhanced β-relaxation in the induced "plasticizer-rich" regions, whereas the propionylated amylopectin nanocomposites displayed higher glass-transition temperature due to restricted macromolecular mobility. These results suggested that the structures and further packaging properties of starch-based nanocomposites could be better understood by controlling the interaction of starch with other ingredients.
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