Methods for forming polyimide-carbon nanotube composite film, and polyimide-carbon nanotube composite films formed thereof
AssigneeNanyang Technological University
InventorsBee Eng Mary Chan, Wei Yuan
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Abstract
A method for forming a polyimide-carbon nanotube composite film on a substrate is provided. The method comprises: suspending carbon nanotubes in a solution comprising a poly(amic acid) and a suitable solvent; casting the solution onto a substrate to form a layer on the substrate; and heating the layer to convert the poly(amic acid) into a polyimide to form the polyimide-carbon nanotube composite film. A polyimide-carbon nanotube composite film and an electronic device comprising the polyimide-carbon nanotube composite film are also provided.
Claims26
A method for forming a polyimide-carbon nanotube composite film on a substrate, the method comprising
- a) suspending carbon nanotubes in a solution comprising a poly(amic acid) and a suitable solvent, the poly(amic acid) having the chemical formula (I)
- wherein
- A is selected from monocyclic, condensed polycyclic or bridged C5-C20 aryl, 5-20-membered monocyclic, condensed polycyclic or bridged heteroaryl comprising 1 to 4 heteroatoms selected from N, O and S, or a system of two, three or four bridged C5-C20 aryl and 5-20-membered heteroaryl, wherein said aryl or heteroaryl is optionally substituted;
- R is nothing, C═O, substituted or unsubstituted straight-chain or branched C1-C10 alkyl, substituted or unsubstituted straight-chain or branched C2-C10 alkenyl, substituted or unsubstituted straight-chain or branched C2-C10 alkynyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C3-C10 heterocycloalkyl, substituted or unsubstituted monocyclic, condensed or bridged C5-C20 aryl;
- and
- n is an integer of at least 20;
- b) casting the solution onto a substrate to form a layer on the substrate;
- and
- c) heating the layer to convert the poly(amic acid) into a polyimide to form the polyimide-carbon nanotube composite film.
A polyimide-carbon nanotube composite film comprising carbon nanotubes and a polyimide having the chemical formula (III)
- wherein
- A is selected from monocyclic, condensed polycyclic or bridged C5-C20 aryl, 5-20-membered monocyclic, condensed polycyclic or bridged heteroaryl comprising 1 to 4 heteroatoms selected from N, O and S, or a system of two, three or four bridged C5-C20 aryl and 5-20-membered heteroaryl, wherein said aryl or heteroaryl is optionally substituted;
- R is nothing, C═O, substituted or unsubstituted straight-chain or branched C1-C10 alkyl, substituted or unsubstituted straight-chain or branched C2-C10 alkenyl, substituted or unsubstituted straight-chain or branched C2-C10 alkynyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C3-C10 heterocycloalkyl, substituted or unsubstituted monocyclic, condensed or bridged C5-C20 aryl;
- and
- n is an integer of at least 20.
Dependencies are inferred from the claim text.