title: High-Performance Carbon Nanotube/Polymer Composite Fiber from Layer-by-Layer Deposition.
abstract: So far, preparation of high-performance carbon nanotube (CNT)/polymer composites still faces big challenges mainly due to the limited control of CNT dispersion, fraction, and alignment in polymers. Here, a new "layer-by-layer deposition" method is put forward for preparing CNT/polymer composite fibers using poly(vinyl alcohol) (PVA) as an exemplary polymer. This is based on the continuous production of a hollow cylindrical CNT assembly from a high temperature reactor and its shrinking by a PVA-containing solution and deposition on a removable substrate wire. The in situ mixing of the two composite components at the molecular level allows CNTs to disperse and PVA to infiltrate into the fiber efficiently. As a result, remarkable effects of the CNT reinforcement on the PVA matrix are observed, including a strength improvement from ∼50 to 1255 MPa and electrical conductivity from ∼0 to 1948 S cm(-1). The new method offers good controllability of CNT dispersion and fraction in the polymer matrix, variability for making composite fibers using different polymers, and suitability for scaled up production. This study thus provides a new research direction for preparing CNT-reinforced composites and future performance maximization.
authors.affiliation: Nano Carbon Research Center, School of Mechanical and Power Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P. R. China.
authors.forename: Min Le
authors.initials: ML
authors.lastname: Wu
authors.affiliation: School of Materials Science and Engineering, Shanghai Jiao Tong University , 800 Dong Chuan Road, Shanghai 200240, P. R. China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Nano Carbon Research Center, School of Mechanical and Power Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P. R. China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Nano Carbon Research Center, School of Mechanical and Power Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P. R. China.
authors.forename: Hang
authors.initials: H
authors.lastname: Zhan
authors.affiliation: Nano Carbon Research Center, School of Mechanical and Power Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Qiang
authors.affiliation: Nano Carbon Research Center, School of Mechanical and Power Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, P. R. China.
authors.forename: Jian Nong
authors.initials: JN
authors.lastname: Wang
keywords: carbon nanotubes; composite fiber; high performance; large scale production; layer by layer