Nanowire recovery methods, compositions, and articles
View Patent ↗Methods of recovering compositions comprising nanowires and the product compositions are disclosed and claimed. The product compositions produced by these methods are able to provide equivalent performance to virgin raw materials in transparent conductive film manufacturing processes.
1. A method comprising:
separating a slurry comprising macroscopic solids and silver nanowires into at least one first composition comprising at least some of the macroscopic solids and at least one second composition comprising at least a first portion of the silver nanowires, the macroscopic solids having a largest dimensional size greater than 1 micron; and
separating the at least one second composition into at least one third composition and at least one product composition, the at least one third composition comprising at least one contaminant and the at least one product composition comprising at least a second portion of the silver nanowires,
wherein separating the at least one second composition comprises centrifuging the at least one second composition in the presence of at least one first solvent comprising at least one first alcohol and at least one ketone.
2. The method according to claim 1 , wherein separating the slurry comprises filtration.
3. The method according to claim 1 , wherein the at least one contaminant is soluble in the at least one first solvent.
4. The method according to claim 3 , wherein the centrifugation is performed in the presence of at least one second solvent.
5. The method according to claim 4 , wherein at least one of the at least one contaminant or the at least one first solvent is insoluble in the at least one second solvent.
6. The method according to claim 1 , wherein at least some of the silver nanowires have a largest dimensional size less than about 200 nm.
7. The method according to claim 1 , wherein the at least one product composition comprises at least about 87% of the silver nanowires.
8. The method according to claim 1 , wherein the at least one product composition comprises at least one second alcohol.
9. The product composition produced according to the method of claim 1 .
10. The method according to claim 8 , wherein the at least one first alcohol and the at least one second alcohol are the same.
11. The method according to claim 8 , wherein the at least one first alcohol and the at least one second alcohol are not the same.