Accession Number : ADA582365


Title :   Carbon Nanotube Thermal Interfaces Enhanced with Sprayed on Nanoscale Polymer Coatings


Descriptive Note : Journal article


Corporate Author : GEORGIA INST OF TECH ATLANTA SCHOOL OF MATERIALS SCIENCE AND MECHANICAL ENGINEERING


Personal Author(s) : Taphouse, John H ; Bougher, Thomas L ; Singh, Virendra ; Abadi, Parisa P ; Graham, Samuel ; Cola, Baratunde A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a582365.pdf


Report Date : 20 Feb 2013


Pagination or Media Count : 10


Abstract : Vertical carbon nanotube (CNT) forests bonded at room temperature with sprayed on nanoscale polymer coatings are found by measurement to produce thermal resistances that are on a par with those of conventional metallic solders. These results are achieved by reducing the high contact resistance at CNT tips, which has hindered the development of high performance thermal interface materials based on CNTs. A spray coating process is developed for depositing nanoscale coatings of polystyrene and poly-3-hexylthiophene onto CNT forests, as a bonding agent that mitigates thermal resistance by enhancing the area available for heat transfer at CNT contacts. Resistances as low as 4:9 +/- 0:3 mm2 K W(expn -1) are achieved for the entire polymer coated CNT interface structure. The suitability of the spray coating process for large-scale implementation and the role of polymer and CNT forest thickness in determining the thermal resistance are also examined.


Descriptors :   *CARBON NANOTUBES , *COATINGS , *POLYMERS , ROOM TEMPERATURE , SCANNING ELECTRON MICROSCOPY , SPRAYS , SYNTHESIS(CHEMISTRY) , THERMAL PROPERTIES


Subject Categories : Physical Chemistry
      Refractory Fibers
      Coatings, Colorants and Finishes
      Plastics


Distribution Statement : APPROVED FOR PUBLIC RELEASE