Cellulose nanofibers decorated with magnetic nanoparticles: synthesis, structure and use in magnetized high toughness membranes for a prototype loudspeaker

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

Cellulose nanofibers decorated with magnetic nanoparticles : synthesis, structure and use in magnetized high toughness membranes for a prototype loudspeaker

Artikel/kapitelEngelska2013

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2013
electronicrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:kth-133562
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133562URI
https://doi.org/10.1039/C3TC31748JDOI

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Språk:engelska
Sammanfattning på:engelska

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

Anmärkningar

QC 20131220
Magnetic nanoparticles are the functional component for magnetic membranes, but they are difficult to disperse and process into tough membranes. Here, cellulose nanofibers are decorated with magnetic ferrite nanoparticles formed in situ which ensures a uniform particle distribution, thereby avoiding the traditional mixing stage with the potential risk of particle agglomeration. The attachment of the particles to the nanofibrils is achieved via aqueous in situ hydrolysis of metal precursors onto the fibrils at temperatures below 100 °C. Metal adsorption and precursor quantification were carried out using Induction Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). FE-SEM was used for high resolution characterization of the decorated nanofibers and hybrid membranes, and TEM was used for nanoparticle size distribution studies. The decorated nanofibers form a hydrocolloid. Large (200 mm diameter) hybrid cellulose/ferrite membranes were prepared by simple filtration and drying of the colloidal suspension. The low-density, flexible and permanently magnetized membranes contain as much as 60 wt% uniformly dispersed nanoparticles (thermogravimetric analysis data). Hysteresis magnetization was measured by a Vibrating Sample Magnetometer; the inorganic phase was characterized by XRD. Membrane mechanical properties were measured in uniaxial tension. An ultrathin prototype loudspeaker was made and its acoustic performance in terms of output sound pressure was characterized. A full spectrum of audible frequencies was resolved.

Ämnesord och genrebeteckningar

TEKNIK OCH TEKNOLOGIER Materialteknik Pappers-, massa- och fiberteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Paper, Pulp and Fiber Technology hsv//eng
Nanocomposite
Magnetic nanoparticle
Cellulose nanofiber
Mechanical properties
Acoustic

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

Andersson, RichardKTH,Polymera material(Swepub:kth)u1ksh6cc (författare)
Salajkova, MichaelaKTH,Biokompositer,Wallenberg Wood Science Center(Swepub:kth)u1li8aph (författare)
Ström, ValterKTH,Teknisk materialfysik(Swepub:kth)u1u6wc2n (författare)
Olsson, RichardKTH,Polymera material,Wallenberg Wood Science Center(Swepub:kth)u1ob386f (författare)
Berglund, LarsKTH,Biokompositer,Wallenberg Wood Science Center(Swepub:kth)u1wqz3r1 (författare)
KTHBiokompositer (creator_code:org_t)

Sammanhörande titlar

Ingår i:Journal of Materials Chemistry C1:47, s. 7963-79722050-7526

Internetlänk

https://doi.org/10.1039/C3TC31748JFulltext
http://pubs.rsc.org/en/content/articlelanding/2013/tc/c3tc31748j#!divAbstractJournal of Materials Chemistry C
https://kth.diva-portal.org/smash/get/diva2:662123/FULLTEXT01.pdffulltext:print
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133562
https://doi.org/10.1039/C3TC31748J

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Journal of Materials Chemistry C (Sök värdpublikationen i LIBRIS)

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Av författaren/redakt...: Galland, Sylvain ...; Andersson, Richa ...; Salajkova, Micha ...; Ström, Valter; Olsson, Richard; Berglund, Lars

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Pappers massa oc ...

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Av lärosätet: Kungliga Tekniska Högskolan

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