Carbon nanomaterials such as graphene improve the thermal conductivity of polymers. They have high TC at ambient temperature. Graphene exhibits a high aspect ratio with high TC (≥5000 W•m -1 •K -1 ) . The TC value of epoxy (BE)/4,4′-diaminodiphenyl methane/GNP (graphite nanoplatelets) and BE/DDMGNP-10 nanocomposites was enhanced to 2.21 W•m -1 •K -1 which is ten times higher than conventional EP . Cellulose/multiwall carbon nanotube (MWCNT) exhibited in-plane and through-plane TC of 1.98 and 0.34 W•m -1 •K -1 , respectively . The composite was prepared via several steps, including 1) a simple paper-making step, 2) a layer-by-layer assembly step, and 3) in-situ welding (Figure ). There is a significant increase in the in-plane TC with the addition of CNT content without a substantial increase in the through-plant conductivity (Figure ) . MWCNT and GNP improved thermal and electrical conductivity for composites of polyoxymethylene (POM)/ PLA/MWCNT and POM/graphene nanoplate (GNP) (denoted as PMCNT and PMGNP, respectively) . PMCNT and PMGNP exhibited electrical and through-plane thermal conductivities of 3484 S•m -1 and 1.95 W•m -1 •K -1 , respectively, for PMCNT40, and 2695 S•m -1 and 4.24 W•m -1 •K -1 , for the corresponding values for PMGNP48 . MWCNT improved the thermal and electrical conductivity compared to GNPs. GNPs (loading of 40 wt.%) improved the thermal and electrical conductivity for the PBAT/PLA blend (ratio of PBAT:PLA was 75:25), offering thermal conductivity and electrical conductivity of 3.15 W•m -1 •K -1 and 338 S•m -1 , respectively . The polymer's properties are enhanced with the GNPs content (Figure ). The presence of PLA ensures a confined composite of PBAT and GNPs according to TEM images (Figure ). Electronic devices are usually used in traditional polymers such as polypropylene (PP), polystyrene (PS), polyimide (PI), and poly(ethylene terephthalate) (PET). These polymers are mainly non-degradable, causing environmental concerns. In contrast, biodegradable polymers are environmentally friendly with high biocompatibility and metabolization properties. Thus, they can be used for implantable chips and wearable devices.