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Functionalization Routes for Keratin from Poultry Industry Side-Streams-Towards Bio-Based Absorbent Polymers
Univ Seville, Escuela Politecn Super, Fac Quim, Dept Ingn Quim, Seville 41012, Spain..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.ORCID iD: 0000-0002-2073-7005
Swedish Univ Agr Sci, Dept Plant Breeding, Box 190, SE-23422 Lomma, Sweden..
Univ Seville, Escuela Politecn Super, Fac Quim, Dept Ingn Quim, Seville 41012, Spain..ORCID iD: 0000-0002-4794-731X
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2023 (English)In: Polymers, E-ISSN 2073-4360, Vol. 15, no 2, p. 351-, article id 351Article in journal (Refereed) Published
Abstract [en]

Keratin is a largely available protein that can be obtained from the ca. 3 million tons of feathers that the European poultry industry produces as a side-stream. Here, the functionalization of keratin from poultry feathers was evaluated using a one- versus two-stage process using two functionalization agents (succinic anhydride-SA and ethylene dianhydride-EDTAD). The functionalization resulted in the keratin having improved liquid swelling capacities, reaching up to 400%, 300%, and 85% increase in water, saline, and blood, respectively, compared to non-functionalized keratin. The highest swelling was obtained for samples functionalized with EDTAD (one-stage process), while the highest saline uptake was noted for samples processed with 25 wt% SA (two-stage process). Swelling kinetics modeling indicated that the water uptake by the functionalized samples takes place in two steps, and the EDTAD samples showed the highest diffusivity. It is demonstrated that the one-stage functionalization of keratin utilizing EDTAD results in better performance than two-stages, which allows for resource-saving and, thereby, protecting the environment. The results show some potential for the keratin to be utilized as liquid absorbent materials in water, saline, and blood uptake applications. Using keratin from side-streams is an advantage from a sustainability perspective over biomacromolecules that need to be extracted from virgin biomass.

Place, publisher, year, edition, pages
MDPI AG , 2023. Vol. 15, no 2, p. 351-, article id 351
Keywords [en]
poultry feathers, biopolymer, functionalization, succinic anhydride, EDTAD, superabsorbent
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-324637DOI: 10.3390/polym15020351ISI: 000927674500001PubMedID: 36679232Scopus ID: 2-s2.0-85146705452OAI: oai:DiVA.org:kth-324637DiVA, id: diva2:1742390
Note

QC 20230309

Available from: 2023-03-09 Created: 2023-03-09 Last updated: 2024-01-17Bibliographically approved

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Capezza, Antonio JoseHedenqvist, Mikael S.

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Capezza, Antonio JoseBengoechea, CarlosJohansson, EvaHedenqvist, Mikael S.
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