Accession Number : AD1025137


Title :   STIR: Microwave Response of Carbon Nanotubes in Polymer Nanocomposite Welds


Descriptive Note : Technical Report,01 Feb 2015,31 Oct 2015


Corporate Author : Texas Engineering Experiment Station College Station United States


Personal Author(s) : Green,Micah J ; Saed,Mohammad ; McFerrin,Artie


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1025137.pdf


Report Date : 28 Jan 2016


Pagination or Media Count : 19


Abstract : Thrust 1 of the STIR project examines the heat response of polymer composites loaded with carbon nanotubes (CNTs) to microwave irradiation. This involves (1) a study of how CNT loading affects dielectric properties of polymer composites and (2) a study of how CNT loading affects the heating response to microwave radiation. Our hypothesis is that the heating of CNTs alone is not the only factor; rather, the formation of resistive (rather than capacitive) percolating CNT networks is the dominant factor in the interaction of the sample with the microwave field and the subsequent heat evolution. Thrust 2 of the STIR project examines the effects of microwave heating of CNT-based adhesives at welds between polymer films. We hypothesize that localized CNT heating at an interface allows for polymer mobility across the interface can allow the weld to become as strong as the bulk polymer sample. We investigate such welds in both bonded polymer films and printed polymer filament structures. For our experimental system, we choose polylactic acid (PLA) as a model polymer, given its common application in additive manufacturing. 1-3 For the nanofiller, we utilize multi-walled carbon nanotubes.


Descriptors :   carbon nanotubes , polymers , NANOCOMPOSITES , manufacturing , diffusion , heating , microwaves , WELDS , dielectric properties , polymeric films , radiation , adhesives , Calorimetry , thermal images , heat transfer , frequency , FORWARD LOOKING INFRARED SYSTEMS


Subject Categories : Refractory Fibers
      Laminates and Composite Materials
      Thermodynamics
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE