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Extrusion Parameters for Foaming of a β-Glucan Concentrate
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.ORCID iD: 0000-0001-9979-5488
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience. Chalmers University of Technology, Sweden.ORCID iD: 0000-0003-0310-4465
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2019 (English)In: Journal of polymers and the environment, ISSN 1566-2543, E-ISSN 1572-8919, Vol. 27, no 6, p. 1167-1177Article in journal (Refereed) Published
Abstract [en]

Plastics is a group of materials commonly encountered on a daily basis by many people. They have enabled rapid, low-cost manufacturing of products with complicated geometries and have contributed to the weight reduction of heavy components, especially when produced into a foamed structure. Despite the many advantages of plastics, some drawbacks such as the often fossil-based raw-material and the extensive littering of the material in nature, where it is not degraded for a very long time, needs to be dealt with. One way to address at least one of the issues could be to use polymers from nature instead of fossil-based ones. Here, a β-glucan concentrate originating from barley was investigated. The concentrate was processed into a foam by hot-melt extrusion, and the processing window was established. The effect of different blowing agents was also investigated. Water or a combination of water and sodium bicarbonate were used as blowing agents, the latter apparently giving a more uniform pore structure. The porous structure of the foamed materials was characterized mainly by using a combination of confocal laser scanning microscope and image analysis. The density of the samples was estimated and found to be in a similar range as some polyurethane foams. A set of 3D parameters were also quantified on two selected samples using X-ray microtomography in combination with image analysis, where it was indicated that the porous structure had a pre-determined direction, which followed the direction of the extrusion process. © 2019, The Author(s).

Place, publisher, year, edition, pages
2019. Vol. 27, no 6, p. 1167-1177
Keywords [en]
Extrusion, Hemicellulose, Image analysis, Starch, X-ray microtomography, Elastomers, Foamed products, Melt spinning, Pore structure, Porosity, Sodium bicarbonate, Tomography, X rays, Complicated geometry, Confocal laser scanning microscope, Extrusion parameter, Hot melt extrusion, Low cost manufacturing, Uniform pore structures, X ray microtomography, Blowing agents
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38229DOI: 10.1007/s10924-019-01412-3Scopus ID: 2-s2.0-85062840732OAI: oai:DiVA.org:ri-38229DiVA, id: diva2:1299510
Available from: 2019-03-27 Created: 2019-03-27 Last updated: 2019-06-28Bibliographically approved

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Publisher's full textScopushttps://rd.springer.com/article/10.1007%2Fs10924-019-01412-3

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Loren, NiklasStading, Mats

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