Low defect nanotube application solutions and fabrics and methods for making same
First Claim
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1. A method for forming a low defect, uniform nanotube fabric comprising:
- contacting a plurality of nanotubes with a liquid medium to obtain a mixture;
purifying said mixture to obtain a purified nanotube solution;
degassing said purified nanotube solution;
performing at least one additional defect reduction processing step on said purified nanotube solution; and
depositing said purified nanotube solution over a material layer to form a nanotube fabric layerwherein said step of degassing is performed immediately prior to said at least one additional defect reduction processing step; and
wherein said purified nanotube solution remains in a degassed state during said at least one additional defect reduction step.
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Abstract
The present disclosure provides methods for removing defects nanotube application solutions and providing low defect, highly uniform nanotube fabrics. In one aspect, a degassing process is performed on a suspension of nanotubes to remove air bubbles present in the solution. In another aspect, a continuous flow centrifugation (CFC) process is used to remove small scale defects from the solution. In another aspect, a depth filter is used to remove large scale defects from the solution. According to the present disclosure, these three methods can be used alone or combined to realize a low defect nanotube application solutions and fabrics.
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Citations
23 Claims
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1. A method for forming a low defect, uniform nanotube fabric comprising:
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contacting a plurality of nanotubes with a liquid medium to obtain a mixture; purifying said mixture to obtain a purified nanotube solution; degassing said purified nanotube solution; performing at least one additional defect reduction processing step on said purified nanotube solution; and depositing said purified nanotube solution over a material layer to form a nanotube fabric layer wherein said step of degassing is performed immediately prior to said at least one additional defect reduction processing step; and wherein said purified nanotube solution remains in a degassed state during said at least one additional defect reduction step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification