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Mechanical properties of nanocomposites reinforced by carbon nanotube sponges

Journal of Materiomics 2018年第2期4卷 157-164页

作者： Wenjie Zhao Tong Li Yupeng Li Daniel J.O'Brien Mauricio Terrones Bingqing Wei Jonghwan Suhr X.Lucas Lu Department of Mechanical Engineering University of DelawareNewarkDE 19716United States Center for Composite Materials University of DelawareNewarkDE 19716United States Weapons and Materials Research Directorate U.S.Army Research LaboratoryAberdeen Proving GroundMD 21005United States Department of Materials Science and Engineering The Pennsylvania State University104 Davey LabUniversity ParkPA 16802-6300United States Department of Physics and Center for 2-Dimensional and Layered Materials The Pennsylvania State University104 Davey LabUniversity ParkPA 16802-6300United States Research Center for Exotic Nanocarbons(JST) Shinshu UniversityWakasato 4-17-1Nagano380-8553Japan School of Mechanical Engineering&Department of Energy Science Sungkyunkwan University300 Chunchun-dongJangan-guSuwon 440-746South Korea

carbon nanotube(CNT)sponge exhibits unique porous and hierarchical structure that are beneficial to the design of ultralight and tough *** this study,CNT sponges(undoped and boron doped)reinforced polydimethylsiloxane(PDMS)composites were *** properties of the composite,including compressive modulus,rate-dependent modulus,stress relaxation behaviors,dynamic viscoelastic properties,and their dependency on temperature,were systematically investigated.A micromechanical model,Mori-Tanaka model,was validated to describe the mechanical behaviors of CNT sponge reinforced *** coupling with boron-doped CNT sponge,PDMS composites showed remarkable improvement of mechanical properties,including compressive modulus(70%),viscous modulus(243%)and damping capacity(50%).Such reinforcement effects can be controlled by the morphology of CNT sponges,as the boron-doped and undoped nanocomposites showed distinct viscoelastic *** results proved that CNT sponge reinforcement is a promising strategy to develop engineering composites with both outstanding mechanical stiffness and controllable viscoelastic performances.

关键词： carbon nanotube sponges Nanocomposite Viscoelastic Damping Micromechanics modeling

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