Real-time assessment of carbon nanotube alignment in a polymer matrix under an applied electric field via polarized Raman spectroscopy |
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| Institution: | 1. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA;2. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA;1. Dipartimento di Ingegneria Meccanica e Industriale, Università degli Studi di Brescia, Via Branze 38, 25123 Brescia, Italy;2. Istituto per lo Studio delle Macromolecole, Consiglio Nazionale delle Ricerche, Via De Marini 6, 16149 Genova, Italy;1. Department of Materials Science and Engineering;2. Department of Mechanical Engineering University of Michigan, Ann Arbor, Michigan, U.S.A.;1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China;2. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China;1. School of Materials Science and Engineering, Linyi University, Linyi 276000, Shandong, China;2. School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong 266580, China;1. Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece;2. Institute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, 15341 Ag. Paraskevi Attikis, Athens, Greece |
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| Abstract: | A technique has been developed utilizing polarized Raman spectroscopy to measure alignment of carbon nanotubes in situ in a polymer matrix under an applied electric field. Previous studies of alignment have been restricted to optically transparent solvents or polymerized specimens that prevent accurate analyses of alignment dynamics in polymers. The effects of electric field strength on the degree of alignment and the time to achieve an aligned state are discussed. The use of in situ, real-time polarized Raman spectroscopy provides a non-invasive technique for assessing carbon nanotube alignment, which can assist in determining processing conditions to improve the mechanical and electrical properties of aligned nanocomposites. |
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| Keywords: | Carbon nanotube Raman spectroscopy Electric field Process monitoring |
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