Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion
The addition of inorganic fillers into a bioplastic could increase its mechanical properties, which will be influenced strongly by the type of the clay dispersion. In this work, we have used montmorillonite nanoclays (MMT) to prepare biocomposites by means of an extrusion process. We present herein...
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Budapest University of Technology
2018-07-01
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doaj-ac22bb817df8412aa1526e277fb6b64a2020-11-24T23:22:35ZengBudapest University of Technology eXPRESS Polymer Letters1788-618X2018-07-0112761662710.3144/expresspolymlett.2018.52Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersionE. Cortes-TrivinoI. MartinezThe addition of inorganic fillers into a bioplastic could increase its mechanical properties, which will be influenced strongly by the type of the clay dispersion. In this work, we have used montmorillonite nanoclays (MMT) to prepare biocomposites by means of an extrusion process. We present herein the effect of the pH and the addition of montmorillonite nanoclays (MMT) on the barrier and mechanical properties of wheat gluten based bioplastics. The pH of the samples was modified by adding aqueous solution of a strong acid or base (H2SO4 and NaOH). Tensile, dynamic mechanical thermal analysis (DMTA), water absorption and X-ray tests were carried out to study the influence of the above-mentioned variables on the physicochemical properties and rheological behaviour of bioplastics and biocomposites obtained. Tensile results showed that both Young’s modulus and tensile strength are higher at unmodified pH. However, the addition of MMT to an alkaline biopolymer matrix produced remarkable improvements in the rheological and mechanical properties because of a high exfoliation of the nanoclay noticeable in X-ray results. To summarise, extrusion process and the use of nanoclays present an excellent opportunity to develop wheat gluten bioplastics able to replace conventional products.http://www.expresspolymlett.com/letolt.php?file=EPL-0008946&mi=cdNanocompositesextrusionwheat glutenmontmorillonitepH |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
E. Cortes-Trivino I. Martinez |
spellingShingle |
E. Cortes-Trivino I. Martinez Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion eXPRESS Polymer Letters Nanocomposites extrusion wheat gluten montmorillonite pH |
author_facet |
E. Cortes-Trivino I. Martinez |
author_sort |
E. Cortes-Trivino |
title |
Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion |
title_short |
Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion |
title_full |
Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion |
title_fullStr |
Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion |
title_full_unstemmed |
Wheat gluten/montmorillonite biocomposites: Effect of pH on the mechanical properties and clay dispersion |
title_sort |
wheat gluten/montmorillonite biocomposites: effect of ph on the mechanical properties and clay dispersion |
publisher |
Budapest University of Technology |
series |
eXPRESS Polymer Letters |
issn |
1788-618X |
publishDate |
2018-07-01 |
description |
The addition of inorganic fillers into a bioplastic could increase its mechanical properties, which will be influenced strongly by the type of the clay dispersion. In this work, we have used montmorillonite nanoclays (MMT) to prepare biocomposites by means of an extrusion process. We present herein the effect of the pH and the addition of montmorillonite nanoclays (MMT) on the barrier and mechanical properties of wheat gluten based bioplastics. The pH of the samples was modified by adding aqueous solution of a strong acid or base (H2SO4 and NaOH). Tensile, dynamic mechanical thermal analysis (DMTA), water absorption and X-ray tests were carried out to study the influence of the above-mentioned variables on the physicochemical properties and rheological behaviour of bioplastics and biocomposites obtained. Tensile results showed that both Young’s modulus and tensile strength are higher at unmodified pH. However, the addition of MMT to an alkaline biopolymer matrix produced remarkable improvements in the rheological and mechanical properties because of a high exfoliation of the nanoclay noticeable in X-ray results. To summarise, extrusion process and the use of nanoclays present an excellent opportunity to develop wheat gluten bioplastics able to replace conventional products. |
topic |
Nanocomposites extrusion wheat gluten montmorillonite pH |
url |
http://www.expresspolymlett.com/letolt.php?file=EPL-0008946&mi=cd |
work_keys_str_mv |
AT ecortestrivino wheatglutenmontmorillonitebiocompositeseffectofphonthemechanicalpropertiesandclaydispersion AT imartinez wheatglutenmontmorillonitebiocompositeseffectofphonthemechanicalpropertiesandclaydispersion |
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