Impact of solvent quality on the network strength and structure of alginate gels
Artikel i vetenskaplig tidskrift, 2016

The influence of the mixture of water and alcohols on the solubility and properties of alginate and its calcium-induced gels is of interest for the food, wound care and pharmaceutical industries. The solvent quality of water with increasing amounts of ethanol (0-20%) on alginate was studied using intrinsic viscosity. The effect of ethanol addition on the rheological and mechanical properties of calcium alginate gels was determined. Small-angle X-ray scattering and transmission electron microscopy were used to study the network structure. It is shown that the addition of ethanol up to 15% (wt) increases the extension of the alginate chain, which correlates with increased moduli and stress being required to fracture the gels. The extension of the polymer chain is reduced at 20% (wt) ethanol, which is followed by reduced moduli and stress at breakage of the gels. The network structure of gels at high ethanol concentrations (24%) is characterized by thick and poorly connected network strands.

Water-ethanol mixture

Rheologya

Intrinsic viscosity

X-ray scattering

Smallangle

Hydrodynamic volume

Ethanol

Författare

Elin Linnea Hermansson

Chalmers, Kemi och kemiteknik

Erich Schuster

SP Sveriges Tekniska Forskningsinstitut AB

Lars Johan Lindgren

Mölnlycke healthcare

A. Altskär

SP Sveriges Tekniska Forskningsinstitut AB

Anna Ström

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Farmaceutisk teknologi

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 144 289-296

Ämneskategorier

Livsmedelsteknik

Polymerteknologi

Kemi

DOI

10.1016/j.carbpol.2016.02.069

PubMed

27083820

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Senast uppdaterat

2018-09-06