Highly Compressive Boron Nitride Nanotube Aerogels Reinforced with Reduced Graphene Oxide

Abstract

Boron nitride nanotubes (BNNTs), structural analogues of carbon nanotubes, have attracted significant attention due to their superb thermal conductivity, wide bandgap, excellent hydrogen storage capacity, and thermal and chemical stability. Despite considerable progress in the preparation and surface functionalization of BNNTs, it remains a challenge to assemble one-dimensional BNNTs into three-dimensional (3D) architectures (such as aerogels) for practical applications. Here, we report a highly compressive BNNT aerogel reinforced with reduced graphene oxide (rGO) fabricated using a freeze-drying method. The reinforcement effect of rGO and 3D honeycomb-like framework offer the BNNTs/rGO aerogel with a high compression resilience. The BNNTs/rGO aerogels were then infiltrated with polyethylene glycol to prepare a kind of phase change materials. The prepared phase change material composites show zero leakage even at 100 °C and enhanced thermal conductivity, due to the 3D porous structure of the BNNTs/rGO aerogel. This work provides a simple method for the preparation of 3D BNNTs/rGO aerogels for many potential applications, such as high-performance polymer composites.

Ultralight Covalent Organic Framework/graphene Aerogels with Hierarchical Porosity

“…In addition, the density of 7.0 ± 0.5 mg cm -3 is lower than that of pure graphene aerogel and graphenebased composites such as G-ZIF8, g-C 3 N 4 -G, MXene/G and BN nanotubes/rGO ( Fig. 2h) [18][19][20][21]29,[32][33][34][35] .…”

“…Graphene oxide (GO) is considered as an ideal precursor for the assembly of extended architectures due to not only its hydrophilic surface and large surface area, but also their ability to easily create versatile composite structures with a variety of emerging material classes [14][15][16] . As example, GO was used to prepare graphene/MXene hydrogels [17][18] , graphene-supported metal organic framework (MOF) 19 , graphitic carbon nitride (g-C 3 N 4 ) nanoribbon/graphene composites 20 , and boron nitride nanotubes/reduced graphene oxide (rGO) aerogels 21 . In these composites not only the beneficial properties of the single compounds is retained, but they also additionally show enhanced electrical conductivity and mechanical property, both endowed by graphene.…”

The Properties and Preparation Methods of Different Boron Nitride Nanostructures and Applications of Related Nanocomposites

“…Ultrathin BN nanomaterials have similar structures and mechanical strength to graphene. [101] Combined with the force model and equivalent mechanical behavior of the BÀ N bond, the in-plane mechanical tensile and shear stiffness of BN are 0.328 and 0.171 TPa/nm, respectively. [74] The Young's modulus of 1 L BN was predicted to be 0.716-0.977 TPa and its breaking strength fell in the wide range of 68-215 GPa.…”

Graphene Modified Montmorillonite Based Phase Change Material for Thermal Energy Storage with Enhanced Interfacial Thermal Transfer

“…Graphite, as a natural non-metallic mineral, has relativity high thermal conductivity, which could be utilized as supporting material for phase change material independently and cooperatively [26]. Su-Gwang Jeong et al [27] used sodium montmorillonite and exfoliated graphite as the supporting material to prepare shaped stabilized phase change material via a vacuum impregnation method, which could improve the thermal conductivity and prevent leakage of phase change material.…”