Facile covalent functionalization of boron nitride nanotubes via coupling reaction
Thang Quoc Huynh1,2, Minsung Kang1, Jeung Gon Kim2,3
1Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST) Chudong-ro 92, Bongdong-eup Wanju-gun 55324 Jeonbuk Korea ahn75@kist.re.kr.
Abstract:
A broad range of functionalized boron nitride nanotubes has been synthesized using a facile method based on the coupling reaction between BNNT and arenediazonium tetrafluoroborate derivatives. The formation of covalent bonds between nanotubes and organic moieties results in homogeneous dispersions in organic solvents, such as N,N'-dimethylformamide, acetone, isopropanol, and tetrahydrofuran. Digital images demonstrated improved and stabilized dispersions lasting for several days, while TEM analysis indicated no breakdown of nanotubes due to the mild reaction conditions employed. The functionalization process was further confirmed through additional characterization, employing FTIR, XPS, and TGA. Surface-functionalized materials exhibited a significant weight percentage of functionality, reaching up to 21.8% according to TGA.
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