Advanced structural characterisation of agar-based hydrogels: Rheological and small angle scattering studies

Martinez-Sanz, MartaIATA-CSIC, Spain,CSIC - Instituto de Agroquimica y Tecnologia de los Alimentos (IATA) (författare)

Advanced structural characterisation of agar-based hydrogels : Rheological and small angle scattering studies

Agar-based extracts from Gelidium sesquipedale were generated by heat and combined heat-sonication, with and without the application of alkali pre-treatment. Pre-treatment yielded extracts with greater agar contents; however, it produced partial degradation of the agar, reducing its molecular weight. Sonication produced extracts with lower agar contents and decreased molecular weights. A gelation mechanism is proposed based on the rheological and small angle scattering characterization of the extracts. The formation of strong hydrogels upon cooling was caused by the association of agarose chains into double helices and bundles, the sizes of which depended on the agar purity and molecular weight. These different arrangements at the molecular scale consequently affected the mechanical performance of the obtained hydrogels. Heating of the hydrogels produced a gradual disruption of the bundles; weaker or smaller bundles were formed upon subsequent cooling, suggesting that the process was not completely reversible.

Ström, Anna,1976Chalmers University of Technology, Sweden,Chalmers tekniska högskola(Swepub:cth)annastr (författare)
Lopez-Sanchez, Patricia,1977RISE,Jordbruk och livsmedel,RISE Research Institutes of Sweden(Swepub:cth)patlop (författare)
Knutsen, Svein HalvorNofima AS, Norway,Norwegian Institute of Food, Fisheries and Aquaculture Research (Nofima) (författare)
Ballance, SimonNofima AS, Norway,Norwegian Institute of Food, Fisheries and Aquaculture Research (Nofima) (författare)
Zobel, Hanne KristineNofima AS, Norway,Norwegian Institute of Food, Fisheries and Aquaculture Research (Nofima) (författare)
Sokolova, AnnaAustralian Nuclear Science and Technology Organisation, Australia (författare)
Gilbert, ElliotAustralian Nuclear Science and Technology Organisation, Australia; University of Queensland, Australia (författare)
Lopez-Rubio, AmparoIATA-CSIC, Spain,CSIC - Instituto de Agroquimica y Tecnologia de los Alimentos (IATA) (författare)
IATA-CSIC, SpainCSIC - Instituto de Agroquimica y Tecnologia de los Alimentos (IATA) (creator_code:org_t)

Av författaren/redakt...: Martinez-Sanz, M ...; Ström, Anna, 197 ...; Lopez-Sanchez, P ...; Knutsen, Svein H ...; Ballance, Simon; Zobel, Hanne Kri ...; visa fler...; Sokolova, Anna; Gilbert, Elliot; Lopez-Rubio, Amp ...; visa färre...

Om ämnet

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

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.