6533b7d7fe1ef96bd1268eea
RESEARCH PRODUCT
Cellulose-inorganic hybrids of strongly reduced thermal conductivity
Matti PutkonenTekla TammelinMaarit KarppinenChao ZhangPatrick E. HopkinsMarie GestraniusRamin GhiyasiPanagiotis SpiliopoulosJohn A. TomkoKai ArstilaEero Kontturisubject
Materials scienceSURFACEPolymers and Plastics116 Chemical sciencesHybridsFILMSchemistry.chemical_compoundThermal conductivitysinkkioksidiZinc oxideCelluloseZINC-OXIDElämmöneristysHybridCellulose nanocrystalsAluminum dopingatomikerroskasvatusDEGRADATIONNANOCOMPOSITESNANOCRYSTALSYIELDChemical engineeringchemistryThermal conductivitylämmön johtuminenNANOCELLULOSEnanoselluloosaohutkalvotdescription
Abstract 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-08-11 | Cellulose |