20.500.12556/DKUM-90409 Dielectric and thermal conductive properties of differently structured ▫$Ti_3C_2T_x$▫ MXene-integrated nanofibrillated cellulose films The fabrication of nanocellulose-based substrates with high dielectric permittivity and anisotropic thermal conductivity to replace synthetic thermoplastics in flexible organic electronics remains a big challenge. Herein, films were prepared from native (CNF) and carboxylated (TCNF) cellulose nanofibrils, with and without the addition of thermally conductive multi-layered Ti3C2Tx MXene, to examine the impact of polar (− OH, − COOH) surface groups on the film morphological, moisturizing, dielectric, and thermal dissipation properties. The electrostatic repulsion and hydrogen bonding interaction between the hydrophilic surface/terminal groups on CNF/TCNF and MXene was shown to render their self-assembly distribution and organization into morphologically differently structured films, and, consequently, different properties. The pristine CNF film achieved high intrinsic dielectric permittivity (ε' ~ 9), which was further increased to almost ε' ~ 14 by increasing (50 wt%) the MXene content. The well-packed and aligned structure of thinner TCNF films enables the tuning of both the composite’s dielectric permittivity (ε' ~ 6) and through-plane thermal conductivity (K ~ 2.9 W/mK), which increased strongly (ε' ~ 17) at higher MXene loading giving in-plane thermal conductivity of ~ 6.3 W/mK. The air-absorbed moisture ability of the films contributes to heat dissipation by releasing it. The dielectric losses remained below 0.1 in all the composite films, showing their potential for application in electronics. nanofibrillated cellulose Ti3C2T Mxene film preparation moisture content thermal conductivity nanofibrilirana celuloza priprava filma vsebnost vlage toplotna prevodnost dielektrične lastnosti true false true Springer Nature (Kluwer) Angleški jezik Slovenski jezik https://link.springer.com/journal/10570 © The Author(s) 2024 Članek v reviji 2024-09-03 09:50:24 2024-09-03 09:50:25 2026-01-14 14:12:33 0000-00-00 00:00:00 2024 0 0 20 str. Published 02 August 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-03-05 2024-07-29 2024-08-02 677.46:620.3 204198403 10.1007/s10570-024-06105-2 1572-882X s10570-024-06105-2.pdf s10570-024-06105-2.pdf 1 DFCCC77CFC41441D0DC1C61183CCF99B 5fd5a6497931dda5ad49baba55506df0e641c3f4b679f316e7e9fe6f9a877970 0b445560-69df-11ef-af22-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=184202 https://link.springer.com/article/10.1007/s10570-024-06105-2 0 1b9c4c1f-69df-11ef-af22-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=184203 Fakulteta za strojništvo 0 0 0