Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications  

作　　者：Ki‑Hyun Ryu Jeong‑Gil Kim Dongju Lee Seo Gyun Kim Bon‑Cheol Ku Jun Yeon Hwang Kwang‑Un Jeong Nam Dong Kim Dae‑Yoon Kim 

机构地区：[1]Functional Composite Materials Research Center,Korea Institute of Science and Technology,Wanju 55324,Republic of Korea [2]Carbon Composite Materials Research Center,Korea Institute of Science and Technology,Wanju 55324,Republic of Korea [3]Department of Polymer‑Nano Science and Technology,Department of Nano Convergence Engineering,Jeonbuk National University,Jeonju 54896,Republic of Korea [4]Department of Chemical and Biomolecular Engineering,Korea Advanced Institute of Science and Technology,Daejeon 34141,Republic of Korea

出　　处：《Advanced Fiber Materials》2023年第2期514-526,共13页先进纤维材料（英文）

基　　金：supported by Korea Institute of Science and Technology(KIST)Open Research Program(ORP)and K-Lab Program,and grants from Mid-Career Researcher Program(2021R1A2C2009423);Korea Government MSIT(2021R1R1R1004226);Korea Research Institute for defense Technology planning and advancement(DAPA KRIT-CT-21-014).

摘　　要：Monofilament type of polyaromatic amide(PA)and carbon nanotube(CNT)composite fibers is presented.A concept of a lyotropic liquid crystal(LLC)constructed via a spontaneous self-assembly is introduced to mitigate the extremely low com-patibility between PA and CNT.These approaches provide an effective co-processing route of PA and CNT simultaneously to fabricate the uniform,continuous,and reliable composite fibers through a wet-spinning.Interestingly,the addition of a small amount PA into the dope solution of CNT governs the LLC mesophase not only in a spinneret stage but also in a coagulant region.Thus,the developed PA/CNT composite fibers have the high uniaxial orientational order and the close interfacial packing compared to the pure CNT fibers.The PA/CNT composite fibers achieve the outstanding tensile strength,electrical conductivity,and electrochemical response,while maintaining a lightweight.They also exhibit the chemical,mechanical,and thermal robustness.All of these advantages can make flexible,sewable,and washable PA/CNT composite fibers ideal nanocomposite materials for use in next-generation information and energy transporting system by replacing conventional metal electrical conductors.

关 键 词：Carbon nanotube Aramid polymer Liquid crystal Composite fiber Electrical wire 

分 类 号：TB383[一般工业技术—材料科学与工程]