Continuous preparation of strong and tough PVA nanocomposite fibers by mechanical stretching-assisted salting-out treatment  

作　　者：Hang Chen Guangze Yang Yingzhi Sun Yichao Xu Mingjie Liu 

机构地区：[1]Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education,School of Chemistry,Beihang University,Beijing 100191,China [2]Research Institute for Frontier Science,Beihang University,Beijing 100191,China [3]International Research Institute for Multidisciplinary Science,Beihang University,Beijing 100191,China

出　　处：《Nano Research》2024年第4期3156-3163,共8页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Project(No.2022YFA1503000);the National Natural Science Foundation of China(Nos.22161142021 and 22175010).

摘　　要：Polymer composite fibers with superior properties such as excellent combined strength and toughness and biocompatibility can be used in high-tech applications of braided protective devices and smart wearable,however the research of high-performance polymer composite fiber remains in the infant stage.Here we present a strategy to produce strong and tough anisotropic polymer nanocomposite fibers with orientedly aligned salt rods using mechanical stretching-assisted salting-out treatment.The prepared nanocomposite fibers have a tensile strength of up to 786±2.7 MPa and an elongation at break of 81%,and the anisotropic fibers exhibit good transmission of mechanical vibration in the longitudinal direction with high resolution.During the fabrication process,the salt builds up into oriented rods during the directional salting process,and the polymer is confined to the 150 nm domain between the rods after the solvent is completely evaporated,giving the nanocomposite fibers superior mechanical properties.The presented strategy can be applied to the continuous mass production of nanocomposite fibers and is also generalizable to other polymer nanocomposites,which could extend the applicability of nanocomposite fibers to conditions involving more demanding mechanical loading and mechanical vibration transmission.

关 键 词：poly(vinyl alcohol)(PVA)nanofibers oriented structure ultrastrong and stiff mechanical vibration transmission salting out continuous production 

分 类 号：TB33[一般工业技术—材料科学与工程]