Microstructural, mechanical and mass transport properties of isotropic and capillary alginate gels
Artikel i vetenskaplig tidskrift, 2014

Macroscopically homogeneous and inhomogeneous calcium alginate gels are formed via internal or external addition of various amounts of calcium to an alginate solution. The externally formed gels contain parallel aligned capillary structures. The mechanical and mass transport properties and the microstructure of the differently set gels were characterized by rheological measurements, fluorescence recovery after photobleaching (FRAP) and transmission electron microscopy (TEM). TEM images show a zone of distorted anisotropic gel structure in the vicinity of the capillaries as well as indications of a lower degree of void connectivity. The diffusion rates of dextran at large distances from the capillaries were fast and capillary gels showed a plastic behaviour in comparison to the internally set gels. The results presented show large functional differences between the internally and externally set gels, which cannot be explained by the presence of capillaries alone.

Författare

E. Schuster

Swedish Institute for Food and Biotechnology

Chalmers University of Technology

Johanna Andersson

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Farmaceutisk teknologi

Anne-Marie Hermansson

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Anette Larsson

Chalmers, Kemi- och bioteknik, Farmaceutisk teknologi

SuMo Biomaterials

Niklas Lorén

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

A. Altskär

Swedish Institute for Food and Biotechnology

Chalmers University of Technology

Anna Ström

Chalmers, Kemi- och bioteknik, Farmaceutisk teknologi

SuMo Biomaterials

Soft Matter

1744-683X (ISSN) 1744-6848 (eISSN)

Vol. 10 357-366

Ämneskategorier

Kemi

Styrkeområden

Materialvetenskap

DOI

10.1039/c3sm52285g