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Protein/Protein Nanocomposite Based on Whey Protein Nanofibrils in a Whey Protein Matrix
KTH Royal Institute of Technology, Sweden.
RISE - Research Institutes of Sweden (2017-2019), Bioekonomi, Papperstillverkning och förpackningar. RISE Research Institutes of Sweden, Bioekonomi och hälsa, Massa, papper och förpackningar.ORCID-id: 0009-0005-9206-4128
SIG Combibloc, Sweden.
SLU Swedish University of Agricultural Sciences, Sweden.
Vise andre og tillknytning
2018 (engelsk)Inngår i: ACS Sustainable Chemistry and Engineering, E-ISSN 2168-0485, Vol. 6, nr 4, s. 5462-5469Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This article describes nanocomposite films with separately grown protein nanofibrils (PNFs) in a nonfibrillar protein matrix from the same protein starting material (whey). Tensile tests on the glycerol-plasticized films indicate an increased elastic modulus and a decreased extensibility with increasing content of PNFs, although the films are still ductile at the maximum PNF content (15 wt %). Infrared spectroscopy confirms that the strongly hydrogen-bonded β-sheets in the PNFs are retained in the composites. The films appear with a PNF-induced undulated upper surface. It is shown that micrometer-scale spatial variations in the glycerol distribution are not the cause of these undulations. Instead, the undulations seem to be a feature of the PNF material itself. It was also shown that, apart from plasticizing the protein film, the presence of glycerol seemed to favor to some extent exfoliation of stacked β-sheets in the proteins, as revealed by X-ray diffraction.

sted, utgiver, år, opplag, sider
2018. Vol. 6, nr 4, s. 5462-5469
Emneord [en]
Mechanical properties, Nanocomposite, Protein fibrils, Protein structure, Whey
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-33753DOI: 10.1021/acssuschemeng.8b00330Scopus ID: 2-s2.0-85044728815OAI: oai:DiVA.org:ri-33753DiVA, id: diva2:1203204
Tilgjengelig fra: 2018-05-02 Laget: 2018-05-02 Sist oppdatert: 2024-02-27bibliografisk kontrollert

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