Modulating rheo-kinetics of native starch films towards improved wet-strength

Thomas Gillgren; Andreas Blennow; Anders J. Pettersson; Mats Stading

doi:10.1016/j.carbpol.2010.07.054

Modulating rheo-kinetics of native starch films towards improved wet-strength

Thomas Gillgren, Andreas Blennow, Anders J. Pettersson, Mats Stading

4 Citationer (Scopus)

Abstract

Starch directly functionalised in the plant by modulation of its biosynthesis by mutagenesis and transgene technology was exploited for its extended functionality beyond the normal variation. In this study we investigated the rheological and mechanical properties of films from such structurally highly different starch types derived from potato and cereal sources of normal and mutant and transgenic backgrounds. A new improved technique was developed to permit the dynamic mechanical analysis of films in the presence of water. It was found that the amylose content was decisive for the mechanical properties of the films – an increase in the amylose content resulted in both a higher stress and strain at break. Interestingly, there was no correlation between the speed of hydration and mechanical water resistance of the films. Generally, the films were clear and transparent, even after wetting. Transgenic potato starch with a low content of phosphate displayed an extraordinary combination of high robustness, transparency, mechanical strength and extensibility even in a wet condition. The combination of optimal phosphate and amylose concentrations in this sample probably favoured hydration and amorphisation without compromising the inter-chain interactions of the polysaccharide network.

Originalsprog	Engelsk
Tidsskrift	Carbohydrate Polymers
Vol/bind	83
Udgave nummer	2
Sider (fra-til)	383-391
Antal sider	9
ISSN	0144-8617
DOI	https://doi.org/10.1016/j.carbpol.2010.07.054
Status	Udgivet - 10 jan. 2011

Adgang til dokumentet

10.1016/j.carbpol.2010.07.054

Citationsformater

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title = "Modulating rheo-kinetics of native starch films towards improved wet-strength",

abstract = "Starch directly functionalised in the plant by modulation of its biosynthesis by mutagenesis and transgene technology was exploited for its extended functionality beyond the normal variation. In this study we investigated the rheological and mechanical properties of films from such structurally highly different starch types derived from potato and cereal sources of normal and mutant and transgenic backgrounds. A new improved technique was developed to permit the dynamic mechanical analysis of films in the presence of water. It was found that the amylose content was decisive for the mechanical properties of the films – an increase in the amylose content resulted in both a higher stress and strain at break. Interestingly, there was no correlation between the speed of hydration and mechanical water resistance of the films. Generally, the films were clear and transparent, even after wetting. Transgenic potato starch with a low content of phosphate displayed an extraordinary combination of high robustness, transparency, mechanical strength and extensibility even in a wet condition. The combination of optimal phosphate and amylose concentrations in this sample probably favoured hydration and amorphisation without compromising the inter-chain interactions of the polysaccharide network. ",

author = "Thomas Gillgren and Andreas Blennow and Pettersson, {Anders J.} and Mats Stading",

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T1 - Modulating rheo-kinetics of native starch films towards improved wet-strength

AU - Gillgren, Thomas

AU - Blennow, Andreas

AU - Pettersson, Anders J.

AU - Stading, Mats

PY - 2011/1/10

Y1 - 2011/1/10

N2 - Starch directly functionalised in the plant by modulation of its biosynthesis by mutagenesis and transgene technology was exploited for its extended functionality beyond the normal variation. In this study we investigated the rheological and mechanical properties of films from such structurally highly different starch types derived from potato and cereal sources of normal and mutant and transgenic backgrounds. A new improved technique was developed to permit the dynamic mechanical analysis of films in the presence of water. It was found that the amylose content was decisive for the mechanical properties of the films – an increase in the amylose content resulted in both a higher stress and strain at break. Interestingly, there was no correlation between the speed of hydration and mechanical water resistance of the films. Generally, the films were clear and transparent, even after wetting. Transgenic potato starch with a low content of phosphate displayed an extraordinary combination of high robustness, transparency, mechanical strength and extensibility even in a wet condition. The combination of optimal phosphate and amylose concentrations in this sample probably favoured hydration and amorphisation without compromising the inter-chain interactions of the polysaccharide network.

AB - Starch directly functionalised in the plant by modulation of its biosynthesis by mutagenesis and transgene technology was exploited for its extended functionality beyond the normal variation. In this study we investigated the rheological and mechanical properties of films from such structurally highly different starch types derived from potato and cereal sources of normal and mutant and transgenic backgrounds. A new improved technique was developed to permit the dynamic mechanical analysis of films in the presence of water. It was found that the amylose content was decisive for the mechanical properties of the films – an increase in the amylose content resulted in both a higher stress and strain at break. Interestingly, there was no correlation between the speed of hydration and mechanical water resistance of the films. Generally, the films were clear and transparent, even after wetting. Transgenic potato starch with a low content of phosphate displayed an extraordinary combination of high robustness, transparency, mechanical strength and extensibility even in a wet condition. The combination of optimal phosphate and amylose concentrations in this sample probably favoured hydration and amorphisation without compromising the inter-chain interactions of the polysaccharide network.

U2 - 10.1016/j.carbpol.2010.07.054

DO - 10.1016/j.carbpol.2010.07.054

M3 - Journal article

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JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

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ER -