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Research Article

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

Hang Chen1, Guangze Yang1, Yingzhi Sun1, Yichao Xu2( ), Mingjie Liu1,3( )
Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Research Institute for Frontier Science, Beihang University, Beijing 100191, China
International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China
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Graphical Abstract

Mechanical stretching-assisted salting out treatment for the preparation of ethylenediamine tetraacetic acid calcium disodium complex (EDTA-Ca)@polyvinyl alcohol (PVA) fiber (EPVAF) displaying ultrahigh mechanical and vibration transmission performance.

Abstract

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.

Keywords

poly (vinyl alcohol) (PVA) nanofibersoriented structureultrastrong and stiffmechanical vibration transmissionsalting outcontinuous production

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Nano Research
Volume 17 Issue 4,
April 2024
Pages 3156-3163
DOI: 10.1007/s12274-023-6075-2
Cite this article:
Chen H, Yang G, Sun Y, et al. Continuous preparation of strong and tough PVA nanocomposite fibers by mechanical stretching-assisted salting-out treatment. Nano Research, 2024, 17(4): 3156-3163. https://doi.org/10.1007/s12274-023-6075-2
Topics:
NanocompositesNanofibersNanostructured materials

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Received: 12 July 2023
Revised: 06 August 2023
Accepted: 07 August 2023
Published: 13 September 2023
© Tsinghua University Press 2023
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