title: Biomass-directed synthesis of 20 g high-quality boron nitride nanosheets for thermoconductive polymeric composites.
abstract: Electrically insulating boron nitride (BN) nanosheets possess thermal conductivity similar to and thermal and chemical stabilities superior to those of electrically conductive graphenes. Currently the production and application of BN nanosheets are rather limited due to the complexity of the BN binary compound growth, as opposed to massive graphene production. Here we have developed the original strategy "biomass-directed on-site synthesis" toward mass production of high-crystal-quality BN nanosheets. The strikingly effective, reliable, and high-throughput (dozens of grams) synthesis is directed by diverse biomass sources through the carbothermal reduction of gaseous boron oxide species. The produced BN nanosheets are single crystalline, laterally large, and atomically thin. Additionally, they assemble themselves into the same macroscopic shapes peculiar to original biomasses. The nanosheets are further utilized for making thermoconductive and electrically insulating epoxy/BN composites with a 14-fold increase in thermal conductivity, which are envisaged to be particularly valuable for future high-performance electronic packaging materials.
authors.affiliation: International Center for Young Scientists (ICYS) and ‡World Premier International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Xue-Bin
authors.initials: XB
authors.lastname: Wang
authors.forename: Qunhong
authors.initials: Q
authors.lastname: Weng
authors.forename: Xi
authors.initials: X
authors.lastname: Wang
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.forename: Xiang-Fen
authors.initials: XF
authors.lastname: Jiang
authors.forename: Hongxuan
authors.initials: H
authors.lastname: Guo
authors.forename: Ningsheng
authors.initials: N
authors.lastname: Xu
authors.forename: Dmitri
authors.initials: D
authors.lastname: Golberg
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Bando
mesh_terms: D018533:Biomass; D001896:Boron Compounds / Q000737:chemistry*; D017097:Electric Impedance; D004852:Epoxy Compounds / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D019064:Product Packaging; D013814:Thermal Conductivity
chemical_list: D001896:Boron Compounds; D004852:Epoxy Compounds; D011108:Polymers; C017282:boron nitride
keywords: boron nitride; carbothermal reaction; composite; nanosheet; synthesis