Membranes with functionalized carbon nanotube pores for selective transport
AssigneeLawrence Livermore National Security, LLC
InventorsOlgica Bakajin, Aleksandr Noy, Francesco Fornasiero, Hyung Gyu Park, Jason K. Holt, Sangil Kim
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Abstract
Provided herein composition and methods for nanoporous membranes comprising single walled, double walled, or multi-walled carbon nanotubes embedded in a matrix material. Average pore size of the carbon nanotube can be 6 nm or less. These membranes are a robust platform for the study of confined molecular transport, with applications in liquid and gas separations and chemical sensing including desalination, dialysis, and fabric formation.
Claims29
A membrane comprising an array of carbon nanotubes functionalized on at least one end of at least one of the nanotubes with from about 5% to about 100% of the sites available for functionalization are functionalized with members of a first group and optionally the remainder of the sites available for functionalization remain free of functionalization or are functionalized with members of a second group, wherein the nanotubes have average pore size of about 6 nm or less and a matrix material disposed between the nanotubes, and wherein the members of the first group are selected from the group consisting of a polyamide, a polyethylene glycol polymer, a dendrimer or a polyelectrolyte, and the members of the second group are functionalized with a charged group or an uncharged group.
A membrane for an enhanced transport of a desalted water from a salted water comprising:
- a substantially vertically-aligned array of carbon nanotubes, wherein the nanotubes have average pore size of about 1-2 nm and with from about 5% to about 100% of the sites available for functionalization on the nanotubes are functionalized with members of a first group and optionally the remainder of the sites available for functionalization on the nanotubes remain free of functionalization or are functionalized with members of a second group, wherein the members of the first group are selected from the group consisting of a polyamide, a polyethylene glycol polymer, a dendrimer or a polyelectrolyte and the members of the second group are functionalized with a charged group or an uncharged group.
Dependencies are inferred from the claim text.