Shahbazi, M, Rajabzadeh, G, Rafe, A et al. (2 more authors) (2016) The physico-mechanical and structural characteristics of blend film of poly(vinyl alcohol) with biodegradable polymers as affected by disorder-to-order conformational transition. Food Hydrocolloids, 60. pp. 393-404. ISSN 0268-005X
Abstract
The binary blend films of poly (vinyl alcohol) (PVA) were prepared with selected biodegradable polymers (Na-alginate, gelatin, chitosan, κ-carrageenan and carboxy methyl cellulose) at the point of their chain entanglement. The water resistance, water vapor permeability and mechanical assays were considered as a benchmark to select the superior blend film. The highest water resistant and water barrier property belonged to the blend that contains κ-carrageenan. Introducing the biodegradable polymers into PVA led to an increase in tensile strength, among which κ-carrageenan being further effective than the others. Accordingly, the influence of conformational change of κ-carrageenan chain from disorder-to-order mode on PVA matrix was monitored by hydrophobicity assay, FT-IR, FE-SEM and XRD. The conformational change of κ-carrageenan increased PVA hydrophobicity. The emergence of new characteristic bands regarding κ-carrageenan found in the fingerprint region of PVA at above κ-carrageenan coil-overlap concentration. FE-SEM exhibited that PVA surface became uniform along with the disappearance of cracks after κ-carrageenan inclusion. The pronounced κ-carrageenan peak appeared in diffraction pattern of PVA after the conformational transition of κ-carrageenan chain.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2016, Elsevier. This is an author produced version of a paper published in Food Hydrocolloids . Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Blend film; Coil-overlap concentration; Tensile strength; Surface hydrophobicity; X-ray diffraction; Biodegradable polymer |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Food Science and Nutrition (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Oct 2016 13:17 |
Last Modified: | 12 Apr 2017 11:48 |
Published Version: | http://dx.doi.org/10.1016/j.foodhyd.2016.03.038 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.foodhyd.2016.03.038 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:98115 |
Commentary/Response Threads
- Shahbazi, M, Rajabzadeh, G, Rafe, A, Ettelaie, R and Ahmadi, SJ The physico-mechanical and structural characteristics of blend film of poly(vinyl alcohol) with biodegradable polymers as affected by disorder-to-order conformational transition. (deposited 07 Oct 2016 13:17) [Currently Displayed]