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Open AccessArticle

Effects of Organic Modification of Montmorillonite on the Properties of Hydroxypropyl Di-Starch Phosphate Films Prepared by Extrusion Blowing

by Yang Qin 1,†, Wentao Wang 1,2,†, Hui Zhang 1,2, Yangyong Dai 1,2, Hanxue Hou 1,2,* and Haizhou Dong 1,2,*
Department of Food Science and Engineering, Shandong Agricultural University, 61 Daizong Street, Tai’an 271000, China
Engineering and Technology Center for Grain Processing of Shandong Province, Tai’an 271000, China
Authors to whom correspondence should be addressed.
Yang Qin and Wentao Wang contributed equally to this work and are co-first authors.
Materials 2018, 11(7), 1064;
Received: 21 May 2018 / Revised: 17 June 2018 / Accepted: 20 June 2018 / Published: 23 June 2018
(This article belongs to the Special Issue Green Composites: Preparation, Properties, and Applications)
The knowledge gained from starch-nanocomposite-film research has not been fully applied commercially because of the lack of appropriate industrial processing techniques for nanofillers and starch films. Three organically modified montmorillonites (OMMTs) were prepared using a semidry kneading method. The effects of the OMMTs on the structures and properties of starch nanocomposite films, prepared by extrusion blowing, were investigated. The X-ray diffraction (XRD) analysis results revealed that the OMMTs with various quaternary ammonium salts possessed differing layer structures and d-space values. The results of the XRD and Fourier-transform infrared spectroscopy (FT-IR) showed that the starch–OMMT interaction resulted in a structural change, namely the starch–OMMT films possessed a balanced exfoliated and intercalated nanostructure, while the starch–MMT film possessed an exfoliated nanostructure with non-intercalated montmorillonite (MMT). The results of the solid-state nuclear magnetic resonance (NMR) analysis suggested that the starch-OMMT nanocomposite possessed comparatively large quantities of single-helix structures and micro-ordered amorphous regions. The starch–OMMT films exhibited good tensile strength (TS) (maximum of 6.09 MPa) and water barrier properties (minimum of 3.48 × 10−10 g·m·m−2·s−1·Pa−1). This study indicates that the addition of OMMTs is a promising strategy to improve the properties of starch films. View Full-Text
Keywords: hydroxypropyl di-starch phosphate; montmorillonite; nanocomposite; extrusion blowing hydroxypropyl di-starch phosphate; montmorillonite; nanocomposite; extrusion blowing
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Qin, Y.; Wang, W.; Zhang, H.; Dai, Y.; Hou, H.; Dong, H. Effects of Organic Modification of Montmorillonite on the Properties of Hydroxypropyl Di-Starch Phosphate Films Prepared by Extrusion Blowing. Materials 2018, 11, 1064.

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