Electroactive shape memory performance of polyurethane/graphene nanocomposites |
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| Affiliation: | 1. Department of Polymer Science & Engineering, Pusan National University, Busan 609-735, Republic of Korea;2. School of Materials Science and Engineering, Pusan National University, Busan 609-735, Republic of Korea;3. Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea;1. School of Chemical and Environment Engineering, North University of China, Taiyuan 030051, People’s Republic of China;2. School of Science, North University of China, Taiyuan 030051, People’s Republic of China;1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150080, People''s Republic of China;2. Department of Astronautical Science and Mechanics, Harbin Institute of Technology, Harbin, 150001, People''s Republic of China;1. Science and Technology on Advanced Composites in Special Environments Laboratory, Harbin Institute of Technology, Harbin 150080, China;2. Composite Materials and Structures Laboratory, Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA;3. Composite Material Research Laboratory, Department of Mechanical Engineering, University of New Orleans, LA 70148, USA;1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, PR China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, PR China;3. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, PR China |
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| Abstract: | A series of electroactive shape memory polyurethane (SMPU) nanocomposites were synthesized from poly(tetramethylene ether) glycol (PTMG), 4,4-methylenebis(phenyl isocyanate) (MDI) and 1,3-butandiol (1,3-BD) with the addition of various amounts of thermally reduced graphenes (TRG) which were chemically modified with allyl isocyanate (iTRG). The effects of iTRG on electroactive shape recovery behaviors as well as the conventional direct heat actuated SMPU material have been studied in terms of morphological, thermal, mechanical, electrical properties and thermomechanical cyclic behavior. It was found that significant increases in electrical conductivity and temperature were obtained high iTRG contents (>2%) to electrically actuate the nanocomposite, along with large increases in glass transition temperature (Tg) and initial modulus with a dramatic drop in elongation at break. |
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| Keywords: | Polyurethane nanocomposites Thermally reduced graphene (TRG) Electroactive Shape memory behavior |
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