High-Strength Single-Walled Carbon Nanotube/Permalloy Nanoparticle/Poly(vinyl alcohol) Multifunctional Nanocomposite Fiber

Abstract

Magnetic nanocomposite fibers are a topic of intense research due to their potential breakthrough applications such as smart magnetic-field-response devices and electromagnetic interference (EMI) shielding. However, clustering of nanoparticles in a polymer matrix is a recognized challenge for obtaining a property-controllable nanocomposite fiber. Another challenge is that the strength and ductility of the nanocomposite fiber decrease significantly with increased weight loading of magnetic nanoparticles in the fiber. Here, we report high-strength single-walled carbon nanotube (SWNT)/permalloy nanoparticle (PNP)/poly(vinyl alcohol) multifunctional nanocomposite fibers fabricated by wet spinning. The weight loadings of SWNTs and PNPs in the fiber were as high as 12.0 and 38.0%, respectively. The tensile strength of the fiber was as high as 700 MPa, and electrical conductivity reached 96.7 S m(-1). The saturation magnetization (Ms) was as high as 24.8 emu g(-1). The EMI attenuation of a fabric woven from the prepared fiber approached 100% when tested with electromagnetic waves with a frequency higher than 6 GHz. The present study demonstrates that a magnetic-field-response device can be designed using the fabricated multifunctional nanocomposite fiber.

Anticorrosive, Ultralight, and Flexible Carbon‐Wrapped Metallic Nanowire Hybrid Sponges for Highly Efficient Electromagnetic Interference Shielding

“…[7b] In general, for lightweight shielding materials, their EMI shielding performance is usually evaluated by a crucial criterion, i.e., specific SE (SSE/ t , dB cm 2 g −1 ), which is defined as EMI SE divided by mass density and thickness. [4c,5c,d] Thus, it is independent of specimen thickness. Such a parameter is highly valuable for determining the effectiveness of a foam or sponge structure by incorporating three important factors: EMI SE, density, and thickness.…”

“…In addition to high EMI shielding performance, lightweight, corrosion resistance and flexibility are other important technological requirements for effective and practical EMI shielding systems . Recently, substantial progress has been made in carbon‐based materials, 2D transition‐metal carbides (MXenes), and/or their polymer‐based composites integrated with low density and good EMI shielding effectiveness (SE, expressed in decibels, dB), such as carbon nanotubes, graphene,[2b,4b,6] and Ti 3 C 2 T x due to their versatile property tenability over wide ranges. [7b] In general, for lightweight shielding materials, their EMI shielding performance is usually evaluated by a crucial criterion, i.e., specific SE (SSE/ t , dB cm 2 g −1 ), which is defined as EMI SE divided by mass density and thickness.…”

All Fiber Based Electrochemical Capacitor towards Wearable AC Line Filters with Outstanding Rate Capability

“…Therefore, the phase angle of current commercial SCs is 0°at 120 Hz (the double frequency of the AC power standard in the United States). [1,[21][22][23][24] Presently, there has been no reported fiber-shaped AC line filter as far as we know, which is mainly due to the remained difficulty to form an oriented porous structure in fiber-shaped devices. [11][12][13][14][15][16] Butler et al deposited vertically oriented graphene sheets on aluminum foil by chemical vapor deposition (CVD) and then obtained SCs efficiently filtering a 120 Hz ripple.…”

“…[5] Fiber-shaped devices have been widely reported in the energy storage and sensor fields owing to the advantages of flexibility, adaptability, miniaturization and weavability, attracting public attention in the miniaturized electronic devices and integrated devices with high expectation. [1,[21][22][23][24] Presently, there has been no reported fiber-shaped AC line filter as far as we know, which is mainly due to the remained difficulty to form an oriented porous structure in fiber-shaped devices. Among numerous routines to produce fiber-shaped devices, wetspinning method is a simple and low-cost strategy for efficiently producing flexible fibers with ultra-long ordered structure since the as-fabricated fibers shows excellent flexibility to be bent into various shapes and even complex deformation changes such as rolling and twisting.…”

Silver-cotton nanocomposites: Nano-design of microfibrillar structure causes morphological changes and increased tenacity

“…Due to the unique properties associated with their size, nanoparticles ranging in composition from silver to various metal oxides have produced functionalized fiber with enhanced or entirely new characteristics123456. The incorporation of nanoparticles is usually achieved by direct mixing with a polymer matrix (or in - situ polymerization) followed by the spinning process.…”