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US 12,735,319 B2Granted
Methods and compositions for highly purified boron nitride nanotubes
AssigneeCollege of William and Mary
InventorsMahmoud S. Amin, David E. Kranbuehl, Hannes C. Schniepp
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Abstract
Herein we describe purified boron nitride nanotube compositions substantially free from hexagonal boron nitride. The compositions have a mass ratio of boron nitride nanotubes to hexagonal boron nitride of at least 100. Methods are provided for producing purified boron nitride nanotube compositions wherein impure compositions are subjected to heating with a C5 to C11 hydrocarbon solvent under specified conditions.
Claims5
A method for producing purified boron nitride nanotube compositions comprising the steps of:
- mixing an impure BNNT sample with a hydrocarbon solvent;
- heating said mixture of said impure BNNT sample and said hydrocarbon solvent for a period of time;
- and
- separating said hydrocarbon solvent from said BNNT sample;
- wherein said step of heating is performed at a temperature within 50° C. of the boiling point of said hydrocarbon solvent,
- wherein said heating is performed for a period exceeding five minutes, and
- wherein said hydrocarbon solvent comprises one or more hydrocarbons possessing at least five carbon atoms and no more than eleven carbon atoms.
4 more elements
Dependencies are inferred from the claim text.