Patent
Inkjet printing of conductive carbon nanotubes
| العنوان: | Inkjet printing of conductive carbon nanotubes |
|---|---|
| Patent Number: | 9,984,785 |
| تاريخ النشر: | May 29, 2018 |
| Appl. No: | 13/278710 |
| Application Filed: | October 21, 2011 |
| مستخلص: | Systems and methods for forming conductive materials. The conductive materials can be applied using a printer in single or multiple passes onto a substrate. The conductive materials are composed of electrical conductors such as carbon nanotubes (including functionalized carbon nanotubes and metal-coated carbon nanotubes), grapheme, a polycyclic aromatic hydrocarbon (e.g. pentacene and bisperipentacene), metal nanoparticles, an inherently conductive polymer (ICP), and combinations thereof. Once the conductive materials are applied, the materials are dried and sintered to form adherent conductive materials on the substrate. The adherent conductive materials can be used in applications such as damage detection, particle removal, and smart coating systems. |
| Inventors: | Roberson, Luke B. (Titusville, FL, US); Williams, Martha K. (Titusville, FL, US); Gibson, Tracy L. (Melbourne, FL, US); Tate, LaNetra C. (Oviedo, FL, US); Snyder, Sarah J. (Terre Haute, IN, US); Fortier, Craig R. (Cocoa, FL, US) |
| Assignees: | The United States of America as Represented by the Administrator of NASA (Washinton, DC, US) |
| Claim: | 1. A method of forming a conductive material comprising: applying a conductive ink with a printer in single or multiple passes onto a substrate; wherein the conductive ink comprises an electrical conductor selected from the group consisting of: carbon nanotubes, graphene, a polycyclic aromatic hydrocarbon, metal nanoparticles, an inherently conductive polymer (ICP) wherein the ICP is not PEDOT, ionic liquid, and combinations thereof; and drying the conductive ink on the substrate to form an adherent conductive material on the substrate; wherein (i) the conductive ink is applied in at least 10 passes; or (ii) the conductive ink comprises uncoated carbon nanotubes, functionalized carbon nanotubes, or metal-coated carbon nanotubes in suspension in a polar solvent comprising a detergent, ionic liquid, or anti-agglomeration agent; or (iii) the method further comprises sintering the adherent conductive material on the substrate at a temperature of 130-170° C.; or (iv) the substrate is magnetic before the applying step; or (v) during the applying step, a magnetic field is applied to the conductive ink from a source other than the substrate; wherein the adherent conductive material has a surface resistivity of less than 100 Ohms/square; wherein the adherent conductive material comprises a plurality of layers, wherein each layer is formed by applying a conductive ink in at least one pass, wherein at least two adjoining layers comprise different electrical conductors or different combinations of electrical conductors. |
| Claim: | 2. The method of claim 1 wherein one layer comprises carbon nanotubes without an inherently conductive polymer, and an adjacent layer comprises an inherently conductive polymer. |
| Claim: | 3. A method of producing a wire comprising a damage detection layer, the method comprising: obtaining a wire comprising a core conductor surrounded by an insulator; and applying a conductive ink with a printer in multiple passes onto the insulator; wherein the conductive ink comprises an electrical conductor selected from the group consisting of: carbon nanotubes, graphene, a polycyclic aromatic hydrocarbon, metal nanoparticles, an inherently conductive polymer (ICP), ionic liquid, and combinations thereof; and drying the conductive ink on the substrate to form the adherent conductive material on the insulator; wherein the adherent conductive material is adapted to be used in detecting damage to the wire. |
| Claim: | 4. The method of claim 3 further comprising applying an insulator material over the adherent conductive material to form an outer insulator layer over the adherent conductive material. |
| Patent References Cited: | 6312303 November 2001 Yaniv et al. 7569160 August 2009 Oldenzijl et al. 7572743 August 2009 Rinzler et al. 7821079 October 2010 Cho et al. 8062697 November 2011 Yaniv et al. 2004/0013597 January 2004 Mao et al. 2004/0197546 October 2004 Rinzler et al. 2004/0241896 December 2004 Zhou et al. 2006/0126175 June 2006 Lu et al. 2007/0151744 July 2007 Chen 2008/0212246 September 2008 Tanaka et al. 2009/0072013 March 2009 Natekar et al. 2010/0102280 April 2010 Ford et al. 2010/0170695 July 2010 Tsotsis 2011/0011629 January 2011 Trigwell et al. 2011/0048772 March 2011 Han 2012/0052436 March 2012 Law et al. 2012/0147448 June 2012 Yaniv et al. WO 2008/092696 August 2008 |
| Other References: | Shi, et al., “A Conducting Polymer Film Stronger Than Aluminum,” Science (1995), 267, p. 994-996. cited by applicant Wang, et al., “Carbon nanotube screen-printed electrochemical sensors,” Analyst (2004), 109, p. 1-2. cited by applicant Huang, et al., “Self-organizing high-density single-walled carbon nanotube arrays from surfactant suspensions,” Nanotechnology 15 (2004), p. 1450-1454. cited by applicant Kordas, et al., “Inkjet Printing of Electrically Conductive Patterns of Carbon Nanotubes,” Small (2006), 2, No. 8-9, p. 1021-1025. cited by applicant Beecher, et al., “Ink-jet printing of carbon nanotube thin film transistors,” Journal of Applied Physics 102 (2007), 043710. cited by applicant “Copper Powder Consolidation Techniques.” Industrial: Powder Metallurgy-. Copper Development Association, Inc., n. d. Downloaded from web Apr. 30, 2014. URL http://www.copper.org/resources/properties/129_6/consolidation.htmlTest. cited by applicant |
| Primary Examiner: | Talbot, Brian K |
| Attorney, Agent or Firm: | Ford, Michelle L. Dvorscak, Mark P. |
| رقم الانضمام: | edspgr.09984785 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |