Composite materials comprising polar polymers and single-wall carbon nanotubes
First Claim
1. A composite comprising single-Well carbon nanotubes, at least one polar polymer selected from the group consisting of polycarbonate, poly(acrylic acid), poly(methacrylic acid), polyoxide, polysulfide, polywulfone, polyamide, polyester, polyurethane, polyimide, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinyl pyridine), poly(vinyl pyrrolidone), copolymers thereof, and combinations thereof, and at least one nonpolar polymer, wherein the single-wall carbon nanotubes are present in the composite in an amount in the range of about 0.01 wt % and 20 wt % of the composite, wherein the composite has an electrical conductivity and wherein the single-wall carbon nanotubes are presented om a weight fraction F, and wherein the electrical conductivity of the composite is:
- i) at least 5 Siemens per centimeter (S/cm) when F≧
0.5, ii) at least 1 S/cm when 0.5>
F≧
0.1, iii) at least 1×
10−
4 S/cm when 0.1>
F≧
0.004 iv) at least 6×
10−
9 S/cm when 0.004>
F≧
0.001, and v) at least 3×
10−
16 S/cm when 0.001>
F≧
0.0001.
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Accused Products
Abstract
The invention relates to a composite comprising a weight fraction of single-wall carbon nanotubes and at least one polar polymer wherein the composite has an electrical and/or thermal conductivity enhanced over that of the polymer alone. The invention also comprises a method for making this polymer composition. The present application provides composite compositions that, over a wide range of single-wall carbon nanotube loading, have electrical conductivities exceeding those known in the art by more than one order of magnitude. The electrical conductivity enhancement depends on the weight fraction (F) of the single-wall carbon nanotubes in the composite. The electrical conductivity of the composite of this invention is at least 5 Siemens per centimeter (S/cm) at (F) of 0.5 (i.e. where single-wall carbon nanotube loading weight represents half of the total composite weight), at least 1 S/cm at a F of 0.1, at least 1×10−4 S/cm at (F) of 0.004, at least 6×10−9 S/cm at (F) of 0.001 and at least 3×10−16 S/cm (F) plus the intrinsic conductivity of the polymer matrix material at of 0.0001. The thermal conductivity enhancement is in excess of 1 Watt/m-° K. The polar polymer can be polycarbonate, poly(acrylic acid), poly(acrylic acid), poly(methacrylic acid), polyoxide, polysulfide, polysulfone, polyamides, polyester, polyurethane, polyimide, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinyl pyridine), poly(vinyl pyrrolidone), copolymers thereof and combinations thereof. The composite can further comprise a nonpolar polymer, such as, a polyolefin polymer, polyethylene, polypropylene, polybutene, polyisobutene, polyisoprene, polystyrene, copolymers thereof and combinations thereof.
-
Citations
14 Claims
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1. A composite comprising single-Well carbon nanotubes, at least one polar polymer selected from the group consisting of polycarbonate, poly(acrylic acid), poly(methacrylic acid), polyoxide, polysulfide, polywulfone, polyamide, polyester, polyurethane, polyimide, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinyl pyridine), poly(vinyl pyrrolidone), copolymers thereof, and combinations thereof, and at least one nonpolar polymer, wherein the single-wall carbon nanotubes are present in the composite in an amount in the range of about 0.01 wt % and 20 wt % of the composite, wherein the composite has an electrical conductivity and wherein the single-wall carbon nanotubes are presented om a weight fraction F, and wherein the electrical conductivity of the composite is:
-
i) at least 5 Siemens per centimeter (S/cm) when F≧
0.5,ii) at least 1 S/cm when 0.5>
F≧
0.1,iii) at least 1×
10−
4 S/cm when 0.1>
F≧
0.004iv) at least 6×
10−
9 S/cm when 0.004>
F≧
0.001, andv) at least 3×
10−
16 S/cm when 0.001>
F≧
0.0001. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for forming a composite comprising single-wall carbon nanotubes, at least one polar polymer selected from the group consisting of polycarbonate, poly(acrylic acid), poly(methacrylic acid), polyoxide, polysulfide, polysulfone, polyamide, polyester, polyurethane, polyimide, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinyl pyridine), poly(vinyl pyrrolidone), copolymers thereof, and combinations thereof, and at least one non-polar polymer, comprising:
-
a) dispersing the single-wall carbon nanotubes, the at least one polar polymer, and the at least one non-polar polymer in a solvent to make a nanotube-polymer suspension; and
b) removing the solvent from the suspension to form a nanotube-polymer composite wherein the single-wall carbon nanotubes are present in the composite in an amount in a range of about 0.01 wt % and about 20 wt % of the composite, wherein the composite has an electrical conductivity and wherein the single-wall carbon nanotubes are present in a weight fraction F, and wherein the electrical conductivity of the composite is;
i) at least 5 Siemens per centimeter (S/cm) when F≧
0.5,ii) at least 1 S/cm when 0.5>
F≧
0.1.iii) at least 1×
10−
4 S/cm when 0.1>
F≧
0.004,iv) at least 6×
10−
9 S/cm when 0.004>
F≧
0.001, andv) at least 3×
10−
16 S/cm when 0.001>
F≧
0.0001. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
Specification
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- Resources
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Current AssigneeSamsung Electronics Co. Ltd.
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Original AssigneeCarbon Nanotechnologies, Inc. (Wisepower Co., Ltd.)
-
InventorsRoylance, Margaret E., Tiano, Thomas M., Smith, Kenneth A., McElrath, Kenneth O.
-
Primary Examiner(s)CHOI, LING SIU
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Application NumberUS10/389,256Publication NumberTime in Patent Office900 DaysField of Search524/496, 524/495, 423/447.3, 423/447.2, 423/445.R, 423/445.BUS Class Current524/496CPC Class CodesB82Y 10/00 Nanotechnology for informat...B82Y 30/00 Nanotechnology for material...C08K 7/24 inorganicH01B 1/24 the conductive material com...Y10S 977/753 with polymeric or organic b...
