- Title
- Effect of spatial distribution of wax and PEG-isocyanate on the morphology and hydrophobicity of starch films
- Creator
- Muscat, Delina; Adhikari, Raju; Tobin, Mark; McKnight, Stafford; Wakeling, Lara; Adhikari, Benu
- Date
- 2014
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/163125
- Identifier
- vital:12779
- Identifier
-
https://doi.org/10.1016/j.carbpol.2014.04.072
- Identifier
- ISBN:0144-8617
- Abstract
- This study proposes a novel method for improving surface hydrophobicity of glycerol plasticized high amylose (HAG) films. We used polyethylene glycol isocyanate (PEG-iso) crosslinker to link HAG and three natural waxes (beeswax, candelilla wax and carnauba wax) to produce HAG + wax + PEG-iso films. The spatial distributions of wax and PEG-iso across the thickness of these films were determined using Synchrotron-based Fourier transform infrared spectroscopy. The hydrophobicity and surface morphology of the films were determined using contact angle (CA) and scanning electron microscopic measurements, respectively. The distribution patterns of wax and the PEG-iso across the thickness of the film, and the nature of crystalline patterns formed on the surface of these films were found to be the key factors affecting surface hydrophobicity. The highest hydrophobicity (CA >90°) was created when the PEG-iso was primarily distributed in the interior of the films and a hierarchical circular pinnacle structure of solidified wax was formed on the surface. © 2014 Elsevier Ltd.
- Publisher
- Elsevier Ltd
- Relation
- Carbohydrate Polymers Vol. 111, no. (2014), p. 333-347
- Rights
- Copyright © 2014 Elsevier Ltd.
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0303 Macromolecular and Materials Chemistry; 0305 Organic Chemistry; 0908 Food Sciences; Amylose; Hydrophobicity; Hydroxyl-PEGylation; Natural wax; Surface morphology; Synchrotron-based FTIR
- Full Text
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