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Sökning: onr:"swepub:oai:DiVA.org:kth-133567" > Strong and Moldable...

  • Galland, Sylvain,1987-KTH,Biokompositer,Wallenberg Wood Science Center,WWSC (författare)

Strong and Moldable Cellulose Magnets with High Ferrite Nanoparticle Content

  • Artikel/kapitelEngelska2014

Förlag, utgivningsår, omfång ...

  • 2014-11-03
  • American Chemical Society (ACS),2014
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-133567
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133567URI
  • https://doi.org/10.1021/am506134kDOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20150116
  • A major limitation in the development of highly functional hybrid nanocomposites is brittleness and low tensile strength at high inorganic nanoparticle content. Herein, cellulose nanofibers were extracted from wood and individually decorated with cobalt-ferrite nanoparticles and then for the first time molded at low temperature (<120 degrees C) into magnetic nanocomposites with up to 93 wt % inorganic content. The material structure was characterized by TEM and FE-SEM and mechanically tested as compression molded samples. The obtained porous magnetic sheets were further impregnated with a thermosetting epoxy resin, which improved the load-bearing functions of ferrite and cellulose material. A nanocomposite with 70 wt % ferrite, 20 wt % cellulose nanofibers, and 10 wt % epoxy showed a modulus of 12.6 GPa, a tensile strength of 97 MPa, and a strain at failure of ca. 4%. Magnetic characterization was performed in a vibrating sample magnetometer, which showed that the coercivity was unaffected and that the saturation magnetization was in proportion with the ferrite content. The used ferrite, CoFe2O4 is a magnetically hard material, demonstrated by that the composite material behaved as a traditional permanent magnet. The presented processing route is easily adaptable to prepare millimeter-thick and moldable magnetic objects. This suggests that the processing method has the potential to be scaled-up for industrial use for the preparation of a new subcategory of magnetic, low-cost, and moldable objects based on cellulose nanofibers.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Andersson, Richard L.KTH,Fiber- och polymerteknologi(Swepub:kth)u1ksh6cc (författare)
  • Ström, ValterKTH,Teknisk materialfysik(Swepub:kth)u1u6wc2n (författare)
  • Olsson, RichardKTH,Polymera material(Swepub:kth)u1ob386f (författare)
  • Berglund, LarsKTH,Biokompositer(Swepub:kth)u1wqz3r1 (författare)
  • KTHBiokompositer (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:ACS Applied Materials and Interfaces: American Chemical Society (ACS)6:22, s. 20524-205341944-82441944-8252

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