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US 12,415,315 B2Granted
Dispersions and manufacturing technologies for additive manufacturing comprising discrete carbon nanotubes
AssigneeMechnano, LLC
InventorsClive P. Bosnvak, Kurt W. Swogger, Steven Lowder, Olga Ivanova
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Abstract
The present invention is directed to additive manufacturing compositions and methods for producing additive manufacturing composite blends with oxidized discrete carbon nanotubes with dispersion agents bonded to at least one sidewall of the oxidized discrete carbon nanotubes. Such compositions are especially useful when radiation cured, sintered or melt fused.
Claims8
A method to modify curing in an additive manufacturing dispersion using radiation comprising:
- preparing an additive manufacturing dispersion
- wherein the dispersion comprises
- at least one portion of a cross-linkable moiety, and
- oxidized, discrete carbon nanotubes comprising a carboxylic acid-amine group with a bonded dispersing agent on at least one sidewall of the oxidized discrete carbon nanotubes
- wherein the oxidized, discrete carbon nanotubes are present in a range of greater than zero and up to about 30% by weight based on a total weight of the dispersion and a plurality of the carbon nanotubes present in the dispersion are discrete, wherein a discrete multi-wall carbon nanotubes have an aspect ratio of at least 10;
- wherein the dispersing agent on the sidewall of the oxidized discrete carbon nanotubes comprises an average molecular weight in a range of about 50 to about 20,000 Daltons and a weight fraction of bonded dispersing agent on the sidewall of the discrete carbon nanotubes relative to the oxidized discrete carbon nanotubes that is greater than about 0.02 and less than about 0.8 and
- radiating the dispersion with electromagnetic radiation comprising microwaves.
4 more elements
A technique to modify curing of an additive manufacturing dispersion comprising:
- preparing an additive manufacturing dispersion wherein the dispersion comprises at least one portion of a cross-linkable acrylate moiety and oxidized, discrete multi-wall carbon nanotubes having an aspect ratio of at least 10 comprising a carboxylic acid-amine group with a bonded dispersing agent on at least one sidewall of the oxidized discrete carbon nanotubes wherein the bonded dispersing agent on the sidewall of the discrete carbon nanotubes comprises molecular units selected from the group of ethers and ethylene oxide;
- wherein the oxidized, discrete carbon nanotubes are present in a range of greater than zero and up to about 30% by weight based on a total weight of the dispersion and a plurality of the carbon nanotubes present in the dispersion are discrete;
- wherein the oxidized discrete carbon nanotubes comprise about 0.1% to about 20% by weight of nitrogen atoms;
- and
- exposing the dispersion to electromagnetic radiation comprising microwaves.
2 more elements
Dependencies are inferred from the claim text.