Effects of multi-functional additives during foam extrusion of wheat gluten materials

Sökning: L773:2399 3669 > Effects of multi-fu...

QC 20240418
To broaden the range in structures and properties, and therefore the applicability of sustainable foams based on wheat gluten expanded with ammonium-bicarbonate, we show here how three naturally ocurring multifunctional additives affect their properties. Citric acid yields foams with the lowest density (porosity of ~50%) with mainly closed cells. Gallic acid acts as a radical scavenger, yielding the least crosslinked/ aggregated foam. The use of a low amount of this acid yields foams with the highest uptake of the body-fluid model substance (saline, ~130% after 24 hours). However, foams with genipin show a large and rapid capillary uptake (50% in one second), due to their high content of open cells. The most dense and stiff foam is obtained with one weight percent genipin, which is also the most crosslinked. Overall, the foams show a high energy loss-rate under cyclic compression (84-92% at 50% strain), indicating promising cushioning behaviour. They also show a low compression set, indicating promising sealability. Overall, the work here provides a step towards using protein biofoams as a sustainable alternative to fossil-based plastic/rubber foams in applications where absorbent and/or mechanical properties play a key role.

Hu, QisongKTH,Polymera material(Swepub:kth)u1jfieg8 (författare)
Capezza, Antonio JoseKTH,Polymera material(Swepub:kth)u1fmvhux (författare)
Johansson, EvaDepartment of Plant Breeding, The Swedish University of Agricultural Sciences, Box 190, SE-234 22, Lomma, Sweden (författare)
Olsson, RichardKTH,Polymera material(Swepub:kth)u1ob386f (författare)
Hedenqvist, Mikael S.KTH,Polymera material(Swepub:kth)u10rkaxe (författare)
KTHPolymera material (creator_code:org_t)

Av författaren/redakt...: Bettelli, Merced ...; Hu, Qisong; Capezza, Antonio ...; Johansson, Eva; Olsson, Richard; Hedenqvist, Mika ...

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Kemiteknik; och Polymerteknologi

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