Cellulose-inorganic hybrids of strongly reduced thermal conductivity

The employment of atomic layer deposition and spin coating techniques for preparing inorganic–organic hybrid multilayer structures of alternating ZnO-CNC layers was explored in this study. Helium ion microscopy and X-ray reflectivity showed the superlattice formation for the nanolaminate structures and atomic force microscopy established the efficient control of the CNCs surface coverage on the Al-doped ΖnO by manipulating the concentration of the spin coating solution. Thickness characterization of the hybrid structures was performed via both ellipsometry and X-ray reflectivity and the thermal conductivity was examined by time domain thermoreflectance technique. It appears that even the incorporation of a limited amount of CNCs between the ZnO laminates strongly suppresses the thermal conductivity. Even small, submonolayer amounts of CNCs worked as a more efficient insulating material than hydroquinone or cellulose nanofibers which have been employed in previous studies.

Description

| openaire: EC/H2020/765378/EU//HYCOAT

Keywords

Aluminum doping, Cellulose nanocrystals, Hybrids, Thermal conductivity, Zinc oxide

DOI

10.1007/s10570-022-04768-3

Citation

Spiliopoulos , P , Gestranius , M , Zhang , C , Ghiyasi , R , Tomko , J , Arstila , K , Putkonen , M , Hopkins , P E , Karppinen , M , Tammelin , T & Kontturi , E 2022 , ' Cellulose-inorganic hybrids of strongly reduced thermal conductivity ' , Cellulose , vol. 29 , no. 15 , pp. 8151–8163 . https://doi.org/10.1007/s10570-022-04768-3

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202209145579

Collections

[article-cris] Kemian tekniikan korkeakoulu / CHEM

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