Type of Document	Thesis
Author	Wang, Sheng
Author's Email Address	shengwangtracy@hotmail.com
URN	etd-07112005-164744
Title	Characterization and Analysis of Electrical Conductivity Properties of Nanotube Composites
Degree	Master of Science
Department	Industrial and Manufacturing Engineering, Department of
Advisory Committee	Advisor Name Title Zhiyong Liang Committee Chair Ben Wang Committee Member Chuck Zhang Committee Member James Simpson Committee Member
Keywords	EMI Conductivity Buckypaper Nanotube composites Resistivity
Date of Defense	2005-07-08
Availability	unrestricted
Abstract Carbon nanotubes have attracted tremendous attention in both industrial and academic world due to their incomparable attributes in various areas since their first discovery. In recent years, as one of the most distinctive applications, conductive carbon nanotube composites have been investigated. Comparing with traditional materials, conductive nanocomposites have several advantages including extra-low threshold of particle content, no degradation of mechanical properties, ability to absorb magnetic interference, and tunable conductivity. The main objectives of this thesis were to develop a comprehensive electrical resistivity measurement system which can cover resistivity range from 10E-6 to 10E18 §Ùcm and understand the relationship between their nanostructure and electrical resistivity. The resistivity of various nano-materials produced at FACCT including random and aligned buckypaper (BP), direct mixing and casting samples, BP composites, and multi-scale composites were investigated and characterized. It was found that less than 1% tube loading can make resistivity of neat resin drops more than five orders. Electrical resistivity of MWNT/Epon862 composites decreases with the increase of tube loading. Also, good tube dispersion can help the formation of electrical conductive network. Electrical resistivity of random BP composite is as low as 3.92E-2 §Ùcm. The low resistivity of BP composites, BP/Carbon fiber(CF)/Epon862 composite and MWNT/CF/SC79 multi-scale composite make them very good candidates for EMI shielding materials.
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