Abstract
Owing to formidable advances in the electronics industry, efficient heat removal in electronic devices has been an urgent issue. For thermal management, electrically insulating materials that have higher thermal conductivities are desired. Recently, nanocelluloses (NCs) and related materials have been intensely studied because they possess outstanding properties and can be produced from renewable resources. This article gives an overview of NCs and related materials potentially applicable in thermal management. Thermal conduction in dielectric materials arises from phonons propagation. We discuss the behavior of phonons in NCs as well.
Highlights
After solid-state devices appeared and they replaced electron vacuum tubes, miniaturization has been the hallmark of microelectronics industry [1]
Since there has been an intense demand from public and industry for portable, flexible and high-performance electronic devices, the trend of shrinking size and escalating density will surely continue
H-BN = hexagonal boron nitride, BN nanotubes (BNNTs) = boron nitride nanotube, ND = nanodiamond, DND = nanodiamond produced by detonation
Summary
After solid-state devices appeared and they replaced electron vacuum tubes, miniaturization has been the hallmark of microelectronics industry [1]. The effectiveness of a heat spreading material is related to its thermal conductivity [4]. Organic polymers have significant advantages such as mechanical flexibility, light weight, good processability, high electrical resistivity and affordability Their thermal conductivity is generally low, on the order of 0.1–1.0 W·m−1·K−1 [12]. The studies on the binary composite materials aim to compensate the inferior thermal conductivity of the polymers via inorganic fillers addition. As for organic polymers, there exist papers reporting increased thermal conductivity ascribed to nano-sized structures. Preceding studies on papers and woods have reported that thermal conductivity of usual cellulosic fibers is in the range of 0.1–0.4 W·m−1·K−1 [39,40]. The inherent heat transfer capability of cellulose Iβ relies on phonons traveling along the chain direction in its crystal structure. I[n12p[]1.o2Il]ny. mIpnoeprlyoicmlybmeoredicriiecbsobcdoodiemiesspccooosmmepdpooossfeedcdroyoffstccarrlyylsisnttaaelllliainnneedaanandmdaomarmpohroporhpuohsuorsuergseigroeinognsio,s,tnhtshe,ethhhieigghhheiegrrhddeeerggdrreeeege/f/rrferaeac/tcfirtoianocntioonf (csIos(tFnrFprpfaiyieegcgtos(ttnscrhcFhprufutsaiiyiaeaerpfficgnrtsieclreuoccsiltiyosipfa3rrnsifsoset3bloctl.uiublabr)itaIns.t3urlry)nl.utff.biilAeaaIntklr)nytdeAcf.csyihataeeytliAsceccdehseaeealasesiselirlrsdlsatlaeetiuoiaurssodsaalletosloasetaostlwsostwdaatusteeotwtaeosdepoaemtusdoubeudecucpudaorlhlcepdditleveaaodleerallebirriruliibnin,uoinioaoltnoislrcovchlnrovc,srrseterst.eteetehee,ehr,hTaaaremechsecsi-sirrnhcnheeeemmamhtataleeprrraiiaaarncrneaahill--ottnastsocccicii,,nnohoonohoittnadnohanhfooiotdnuirendfeenfefucrusmeppmtcaicpcinitoaeocvnptioetltatvileyitltaiavyniteyeormttnyimarrymnhtfiacyern[sf[tecere5ro5ig[wtreeor3f35icenoi,,cph3onp5c5snh,aaprh4h4h5sktia]a]aiw4nho.b.itia]snTnwniho.TotsshorsiTffhoooksrenfhpercneffrsgkreaheaepgemetoswegfteoheanreeeomoofossrocforcmminrhuneonamosoatslmtegcrmdntnteiwtaehcisrtsrstbatreoiotimthciwlneeuuhcaiedrgcsanlreolidoiclntdimudeesmnidgbenolrsietds-iemuetenmcfccesorrhrsboelorc-ieiroam-benceouncipnchesnnsrhesodhgiacsiaofmlieooeiowoininnsnrnnnrnetsiesottigFfrhplinhwnoewionahgtarrlcnttieauiontetrttgrirhnrharhpoageetaonanhcehlrlcnnas3srtaoatptirirnohtoggoonanoeernnstrfsr. bthualskthyoofucelbdlulculkolonytsrceiebmlulutaeltoetosreieanmlsh.aatTnehcreieadplsthh. oeTrnhmoeanpl schcooanntdtoeunrcitnsivcgaitityntehorfiibnNigtCioisn.nhmibeitcihoannmisemcshadneisscmrisbeddesicnriFbiegdurien3Fsighuorueld csohnoturlidbuctoenttoribenuhteatnoceednhtahnercmedatlhceornmdaulcctoivnidtyucotfivNitCyso. f NCs
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