Preparation and Characterization of Graphene Oxide/Montmorillonite Synergistically Reinforced Cellulose Nanofiber Aerogels

Nanocellulose-based aerogels have received widespread attention due to the natural and renewable nature of the material, but their flammability and poor mechanical properties have limited their practical application.In this paper, CNF/GO/MMT composite aerogels were prepared by directional freeze-drying using nanofibrillated cellulose as the substrate and graphene oxide (GO) with sodium-based montmorillonite (Na-MMT) as the filler.The method of targeted freezing allowed the composite aerogel to maintain a low thermal conductivity (37.43 mW mK -1 ).Meanwhile, compared with the pure CNF aerogel, the compressive strength of the composite aerogel has been increased by 6 times (up to 669 KPa), and the flame-retardant property has also been significantly improved.These test results indicate that the comprehensive performance of the composite aerogel has been successfully improved by the incorporation of GO/MMT, which provides a new option for building insulation materials.