Covalently bonded graphene oxide–carbon nanotube hybrid nanofillers for achieving high-performance polyamide 6 composites with superior mechanical properties and thermal conductivity

polymerization, the resulting composite containing only 0.2 wt% fGO + CNT-OH + HDI exhibited outstanding mechanical performance, with a 36.3% increase in tensile strength and an exceptional elongation at break of 130.86%. In addition, the thermal conductivity was improved by 46.3%. This interfacial engineering strategy provides a promising pathway toward the development of high-performance liner materials for reliable and safe hydrogen energy applications.