Nanotube dispersants and dispersant free nanotube films therefrom

Patent metadata

Field	Value
Publication number	US-2016192484-A1
Application number	US-201615065794-A
Country	US
Kind code	A1
Filing date	Mar 9, 2016
Priority date	Apr 4, 2011
Publication date	Jun 30, 2016
Grant date	—

Abstract

A degradable polymeric nanotube (NT) dispersant comprises a multiplicity of NT associative groups that are connected to a polymer backbone by a linking group where there are cleavable groups within the polymer backbone and/or the linking groups such that on a directed change of conditions, bond breaking of the cleavable groups results in residues from the degradable polymeric NT dispersant in a manner where the associative groups are uncoupled from other associative groups, rendering the associative groups monomelic in nature. The degradable polymeric nanotube (NT) dispersant can be combined with carbon NTs to form a NT dispersion that can be deposited to form a NT film, or other structure, by air brushing, electrostatic spraying, ultrasonic spraying, ink-jet printing, roll-to-roll coating, or dip coating. The deposition can render a NT film that is of a uniform thickness or is patterned with various thicknesses. Upon deposition of the film, the degradable polymeric nanotube (NT) dispersant can be cleaved and the cleavage residues removed from the film to yield a film where contact between NTs is unencumbered by dispersants, resulting in highly conductive NT films.

First claim

1 - 27 . (canceled)

28 . A patterned NT comprising film, comprising a multiplicity of NTs, wherein the NT's surfaces are free of residual dispersing agents allowing intimate electrical contact between the NTs throughout the film and wherein the thickness of the film varies in a predetermined pattern.

29 . The NT comprising film of claim 28 , wherein the predetermined pattern comprises a series of lines or a grid comprising less than 10% of the film's area connecting windows comprising more than 90% of the film's area, wherein the lines or grid have a transparency of less than 50% transmittance and the windows have a transparency in excess of 60% transmittance.

Assignees

• Univ Florida

Inventors

• Walczak Ryan M
• Reynolds John R
• Rinzler Andrew Gabriel
• Spring Andrew M
• Vasilyeva Svetlana V
• Wadhwa Pooja

Classifications

• H05K1/092 Primary

  Dispersed materials, e.g. conductive pastes or inks · CPC title

• C09D147/00

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds; Coating compositions based on derivatives of such polymers (C09D145/00 takes precedence; based on conjugated diene rubbers C09D109/00 - C09D121/00) · CPC title

• C08K9/04 Primary

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title

• C09D11/30

  Inkjet printing inks · CPC title

• C08J2300/10

  Polymers characterised by the presence of specified groups, e.g. terminal or pendant functional groups · CPC title