Dispersion Of CNTs Research Articles

Effect of carbon nanotube on the mechanical properties of short carbon fiber reinforced polyether-ether-ketone

Additive manufacturing provides a quick and cost-effective way for the fabrication of complex composite structures. Additively manufactured short carbon fiber reinforced polyether-ether-ketone (SCF/PEEK) is a promising thermoplastic composite material due to its excellent designability, ease of manufacture, and good recyclability. However, the mechanical properties of 3D printed SCF/PEEK are unsatisfactory due to the layer-by-layer forming process. In this study, CNTs were introduced to 3D printed SCF/PEEK, and the influence mechanism of CNTs on the mechanical properties was analyzed and discussed in depth. The results showed that the introduction of CNTs could effectively enhance the tensile modulus of 3D printed SCF/PEEK, whilst it led to a decrease in the tensile strength and interlaminar shear strength of the composites. This was mainly related to the poor dispersion and agglomeration of CNTs. The modulus of 3D printed SCF/PEEK reached about 5.17 GPa, representing a 95.1% increase.

Enhancing mechanical properties and microstructure evolution of hybrid AZ61-5SiC-0.5CNTs composite during equal channel angular pressing

Equal channel angular pressing (ECAP) is one of widely used severe plastic deformation methods for improving performance of metallic materials. In this work, the effects of the ECAP on the microstructural evolution and mechanical properties of the AZ61–5SiC-0.5CNTs composite were studied systematically. The results revealed that ECAP can effectively reduce the porosity of the AZ61–5SiC-0.5CNTs composite, refine grains, weaken basal texture, and promote the further dispersion of CNTs, which can optimize the microstructure of the composite. However, the large shear effect of ECAP also leads to the destruction of the structural integrity of the CNTs and thus reduces the strengthening effect. Due to the combined effects of grain refinement, porosity changes, texture evolution, and structural damage of CNTs, the composites reached the highest strength after 2 ECAP passes at 250 ℃. The yield and tensile strengths were increased to 383 MPa (+11.0 %) and 445 MPa (+8.0 %), respectively, while the elongation was marginally reduced, but remained around 6 %.

Effects of boron nitride nanoplates on the dielectric and mechanical properties of carbon nanotubes/silicone rubber composites

AbstractCarbon nanotubes (CNTs) have aroused great attentions in silicone rubber (SR) composites due to the excellent electrical and mechanical properties. However, the distribution of CNTs is not ideal because of the agglomeration effect of nanomaterials. Incorporating different dimensional nanofillers may be a solution. In this work, two‐dimensional boron nitride (BN) was added to fabricate CNTs/BN/SR composites. The results showed that BN could benefit the dispersion of CNTs and improve the dielectric and mechanical behaviors of the composites. Large dielectric constant (5.35, 92% more than pure SR) with extremely low loss tangent (0.00108) was obtained in the SR composites incorporated with 2 wt% CNTs and 5 wt% BN. High tensile stress (836 kPa) and elongation at break (332%) were also achieved, with a low elastic modulus of 557 kPa. Besides, the CNTs/BN/SR composites had thermal stability up to 400°C. Thus, enhanced dielectric and mechanical properties were achieved in CNTs/BN/SR composites by incorporating different dimensional nanofillers, which have great potential applications in dielectric elastomer composites.

The Synergistic Effect of Carbon Black/Carbon Nanotube Hybrid Fillers on the Physical and Mechanical Properties of EPDM Composites after Exposure to High-Pressure Hydrogen Gas.

This study investigated the synergistic effect of carbon black/multi-wall carbon nanotube (CB/MWCNT) hybrid fillers on the physical and mechanical properties of Ethylene propylene diene rubber (EPDM) composites after exposure to high-pressure hydrogen gas. The EPDM/CB/CNT hybrid composites were prepared by using the EPDM/MWCNT master batch (MB) with 10 phr CNTs to enhance the dispersion of CNTs in hybrid composites. The investigation included a detailed analysis of cure characteristics, crosslink density, Payne effect, mechanical properties, and hydrogen permeation properties. After exposure to 96.3 MPa hydrogen gas, the hydrogen uptake and the change in volume and mechanical properties of the composites were assessed. We found that as the MWCNT volume fraction in fillers increased, the crosslink density, filler-filler interaction, and modulus of hybrid composites increased. The hydrogen uptake and the solubility of the composites decreased with an increasing MWCNT volume fraction in fillers. Moreover, after exposure to hydrogen gas, the change in volume and mechanical properties exhibited a diminishing trend with a higher MWCNT volume fraction. We conclude that the hybridization of CB and CNTs formed strong filler-filler networks in hybrid composites, consequently reinforcing the EPDM composites and enhancing the barrier properties of hydrogen gas.

Novel Enhancement Opportunities in the Thermal and Electrical Conductivity of α-Al-CNTs+AgNPs Nanocomposites

In this study, effort was made to develop novel, cutting-edge composite materials consisting of conducting Al-CNTs and green synthesis silver nanoparticles (AgNPs). Spark plasma sintering (SPS) and very intense ball milling were used to develop the composites. The nanocomposites' microstructure, thermal and electrical conductivity were determined. Al-4%CNTs was refined into finer grains when AgNPs are present. The Al-4%CNTs+2%Ag.NPs composite produces a higher dislocation density because of the production of sub-grain. Al-AgNPs + CNTs can be used to make conductors with a high aspect ratio and lower contact resistance at the CNT junctions. It was established that enhanced electrical and thermal conductivity can be obtained using the developed AgNPs from sustainable materials to increase the dispersion of CNTs in Al for the production of high tensile conductors.

Carbon fiber reinforced composites with self‐sensing and self‐healing capabilities enabled by CNT‐modified nanofibers

AbstractCarbon fiber reinforced polymer (CFRP) composites with self‐sensing and self‐healing capabilities was developed in this work. Uniform dispersion of CNTs within a core‐shell nanofiber structure was achieved through a combination of electrospinning and subsequent surface spraying of CNTs. The resulting core‐shell nanofibers were incorporated into CFRP composites using a vacuum‐assisted resin transfer molding process. Mechanical testing demonstrated improved mechanical properties in the composites treated with CNT spraying. Real‐time, precise monitoring of structural damage was enabled through the measurement of electrical signal changes caused by composite deformation in static loading experiments. Furthermore, self‐healing experiments demonstrated that the thermally conductive network formed by CNTs facilitated more uniform heat transfer within the composites. During the healing process, resistive heating of damaged specimens was applied, resulting in a remarkable healing efficiency of 95.2%. The experiments indicate that the composite developed in this paper possess excellent self‐sensing and self‐healing capabilities.Highlights Damage self‐sensing and self‐healing CFRP composites were developed. CNTs‐modified nanofibers were applied to endow the composite specific abilities. Resistivity signals were collected for real‐time damage monitoring. The self‐healing efficiency of the designed composite reached up to 95.2%. Self‐sensing and self‐healing occurred autonomously within closed‐loop structure.

Enhanced thermal shock resistance of low‐carbon Al2O3‐C refractories via CNTs/MgAl2O4 whiskers composite reinforcement

AbstractThe CNTs/MgAl2O4 whiskers composite reinforcement was prepared by catalytic carbon‐bed sintering and added to low‐carbon Al2O3‐C refractories to enhance the thermal shock resistance of refractories. The effects of Ni(NO3)2·6H2O content on the phase and microstructure of CNTs/MgAl2O4 were investigated. The nano‐indentation technology was used to quantitatively evaluate the effect of CNTs/MgAl2O4 on the thermal shock resistance of low‐carbon Al2O3‐C refractories, and the toughening mechanism of CNTs/MgAl2O4 on refractories was further investigated. The results revealed that the inner and outer diameters of the CNTs were approximately 5.69 and 16.26 nm, respectively. The CNTs winded around interlocking structural MgAl2O4 whiskers with a high aspect ratio (>100), which was beneficial to the dispersion of CNTs in the refractory matrix. The thermal shock resistance of low‐carbon Al2O3‐C refractories was significantly improved by adding 3.0 wt.% of CNTs/MgAl2O4 (named C3). The specific fracture energy of refractory matrix and residual strength ratio of C3 reached 141 N·m−1 and 39.2%, which were 29.4% and 97.0% higher than those of the blank sample (109 N·m−1 and 19.9%), respectively. This is because the refractory matrix was significantly reinforced by CNTs and MgAl2O4 whiskers, promoting the occurrence of “bridging” and “crack deflection” and the generation of microcracks in the refractory matrix.

The growth of in-situ CNTs on slag to enhance electromagnetic interference shielding effectiveness of cement-based composite

The present work focused on growth of in-situ CNTs on slag through polymer pyrolysis chemical vapor deposition method (PP-CVD) for improving the electromagnetic interference shielding effectiveness of cement-based composite. The results indicated that numbers of in-situ CNTs were uniformly anchored on the slag particles after PP-CVD treatment, the density and aspect ratio of in-situ CNTs were increased, as the mass ratio of melamine to nickel acetylacetonate increased. However, when the mass ratios exceeded the critical value, amorphous carbons, in contrast to CNTs, were generated on slag particles. The EMI shielding effectiveness (SE) results showed that the EMI SEtotal of the in-situ CNT/slag cement-based composite reach up to 55 dB, much higher than that of the composite with addition of CNTs/slag powder (which were prepared by a combination of surfactant and ultrasonic methods with commercial CNTs), due to the higher electrical conductivity of the former resulted from the improved dispersion of CNTs within the cement-based composite.

One-pot synthesis of a CdS–MoS2 / CNTs nano-composite for photocatalytic hydrogen production under visible light

The need to meet growing energy demands of global society in a sustainable fashion requires the development of techniques and processes to reduce dependence on fossil fuels and transit to renewable energy sources. Environmentally benign technologies for alternative fuel production in the form of hydrogen can be developed via heterogenous photocatalysis, a process based on utilization of solar energy. To this end, a cadmium sulfide (CdS) based photocatalyst was developed, doped with MoS2 in a one-pot solvothermal synthesis technique, and coupled with multi-walled carbon nanotubes (MWCNTs) as a carbonaceous support. The material exhibiting the highest rate of hydrogen evolution, CM5C3, involved a MWCNTs loading of 3% and MoS2 loading of 5%. Compared to pure CdS synthesized with the same adapted procedure, the 3% CNT loading improved the rate of hydrogen production by nearly 7-fold, and the optimal 5% MoS2 loading further improved the performance by 60%. CM5C3, achieved an apparent quantum efficiency of 7.34%, a 26-fold increase compared to pure CdS. FESEM and HRTEM imaging confirmed the nanorod-like growth of CdS–MoS2 on the CNT surface, with elemental mapping confirming homogenous dispersion of MoS2 and CNTs. In addition, lattice fringe spacings indicated the presence of cubic and hexagonal CdS growing predominantly along the (111) and (002) planes respectively, in addition to MoS2 distributed throughout the crystal lattice. XRD analysis confirmed the presence of hexagonal and cubic CdS, however, MoS2 phases were not registered perhaps due to the low concentration present in the bulk of the material. XPS survey scans showed the presence of C, Cd, Mo, and S only, with trace oxygen impurities. Peak deconvolution indicated the presence of characteristic peaks for CdS and MoS2, in addition to evidence of the presence of Cd–C bonds, indicating strong CdS heterojunctions to the CNT surface.

Advancements in Laser Powder Bed Fusion of Carbon Nanotubes-Reinforced AlSi10Mg Alloy: A Comprehensive Analysis of Microstructure Evolution, Properties, and Future Prospects

Laser powder bed fusion (L-PBF) stands out as a promising approach within the realm of additive manufacturing, particularly for the synthesis of CNT-AlSi10Mg nanocomposites. This review delves into a thorough exploration of the transformation in microstructure, the impact of processing variables, and the physico-mechanical characteristics of CNT-AlSi10Mg nanocomposites crafted via the L-PBF technique. Moreover, it consolidates a substantial corpus of recent research, proffering invaluable insights into optimizing L-PBF parameters to attain the desired microstructures and enhanced properties. The review centers its attention on pivotal facets, including the dispersion and distribution of CNTs, the formation of porosity, and their subsequent influence on wear resistance, electrical and thermal conductivity, tensile strength, thermal expansion, and hardness. In line with a logical progression, this review paper endeavors to illuminate the chemical composition, traits, and phase configuration of AlSi10Mg-based parts fabricated via L-PBF, juxtaposing them with their conventionally manufactured counterparts. Emphasis has been placed on elucidating the connection between the microstructural evolution of these nanocomposites and the resultant physico-mechanical properties. Quantitative data culled from the literature indicate that L-PBF-produced parts exhibit a microhardness of 151 HV, a relative density of 99.7%, an ultimate tensile strength of 70×103 mm3N.m, and a tensile strength of 756 MPa.

Improving the strength-ductility synergy of carbon nanotubes reinforced Cu matrix composites through interfacial regulation

How to strengthen the interface bonding and alleviate the contradiction between the strength and ductility of metal matrix composites is a long-standing open issue. Herein, continuous and uniform nano Cu coating was decorated onto the CNTs and used to tailor the interface between CNTs and Cu matrix of CNTs reinforced Cu matrix composite. It is found that coating Cu on CNTs not only can promote the dispersion of CNTs and strengthen the CNTs-Cu interface but also lead to the uniform strain distribution of the fabricated composite and the formation of dislocation deleted region in the interfacial area, resulting in better strength-ductility synergy than uncoated CNTs reinforced Cu matrix composite. Moreover, with precoating Cu on CNTs, the proportion of strength contribution from load transfer strengthening to the overall strength improvement can be increased from 14% to 26.5%. The findings can guide the development of Cu matrix composites with high mechanical performances.

A sensitive, selective non-enzymatic electrochemical detection and kinetic study of glucose over Pt nanoparticles/SWCNTs/NiO ternary nanocomposite

BackgroundThe coupling of inorganic metal nanoparticles, semiconductor-based metal oxide nanostructures, and carbon nanomaterials is a promising strategy to fabricate efficient electrochemical sensors. Herein, we successfully designed a sensitive and selective electrochemical glucose sensor using Pt nanoparticles (PtNPs) decorated single-wall carbon nanotubes (SWCNTs) and nickel oxide (NiO) nanostructure-based composite materials. MethodsThe nanocomposite was synthesized without applying any dispersant or stabilizer using simple ultrasonication and photo-reduction techniques. Significant findingsThe morphology of nanocomposite reveals a homogenous dispersion of CNTs and PtNPs over the NiO nanostructure. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) demonstrated that the ternary nanocomposite-modified glassy carbon electrode (Pt@CNTs/NiO/GCE) displayed enhanced catalytic activity compared to CNTs/NiO/GCE, NiO/GCE or bare GGE electrodes. Kinetics studies indicated that the glucose electrooxidation using Pt@CNTs/NiO modified GCE followed irreversible diffusion-controlled kinetics with a transfer co-efficient value (α) ≈ 0.50. Amperometric sensing investigation revealed excellent sensitivity (149.36 µA mM−1 cm−2) and a lower limit of detection value (2.16 µM). The currently fabricated sensor electrode showed appropriate selectivity in the presence of various organic and inorganic species with outstanding repeatability, reproducibility, and sensor stability. The newly fabricated nanocomposite can represent a promising electro-catalyst for the efficient sensing of glucose and other biomolecules by the electrochemical approach.

(Invited) Designer Polymer Dispersants for Sorting, and Assembly of Carbon Nanotube Arrays

Conjugated polymers have been extensively utilized to isolate semiconducting single walled carbon nanotubes (s-CNTs) in organic solvents creating a high-purity s-CNT “ink”. To overcome inter-CNT π–π interactions to individualize and disaggregate s-CNTs, typically dispersing agents are necessary. Solution deposition of s-CNTs from these inks onto target substrates to create a monolayer of CNT arrays is actively being explored to fabricate FETs with superior performance compared to conventional silicon and gallium arsenide-based FETs. A wide range of deposition and alignment of s-CNTs on substrates has been explored by methods such as Langmuir-Blodgett/Schaefer, vacuum filtration, electric fields, shear, evaporation, 3D printing, and at liquid/liquid interfaces. While significant progress has been made in deposition and alignment of CNTs on wafer-scale, achieving a controllable pitch in a perfectly aligned dense array of CNTs is still a challenge.Following the initial discovery of dispersants such as aromatic conjugated polymers which interact non-covalently with CNTs and sort CNT soot into high-purity, electronics-grade s-CNT inks, the vast community now uses polymers such as polyfluorene and polythiophene homo and copolymers with other monomers. We have focused in this study on revisiting some of the design rules for these conjugated polymer dispersants to incorporate additional functions such as self-assembly dictated pitch control and improving the yield and selectivity of the sorting process. We have investigated ABA triblock copolymers where B is the conjugated block and A is a non-conjugated coil block to study its effect on dispersion and sorting of CNTs. Though these types of ABA di and triblocks have been investigated in the literature for modulation of the photophysical properties of the B block, their use for sorting of s-CNTs is largely unexplored. In this study, Arc CNT or HiPCO soot was mixed with the ABA triblock at various B block: CNT ratio’s and its dispersion and sorting characteristics were studied. Our studies show that the A coil block greatly improves the sorting efficiency while maintaining the semiconducting selectivity. The selectivity of the ABA triblocks towards s-CNT chiralities is similar to the conjugated B block alone. Furthermore, the ABA architecture allows for much lower degree of polymerization for the B block that what is commonly accepted in the literature. Our results show a generalizable polymer dispersant design where the pitch of the assembled CNT arrays can be potentially controlled.

Effect of surface modification and sodium dodecyl sulfate (SDS) on thermal properties of PMMA/SWCNT nanocomposites

ABSTRACTIn this study, the single-walled carbon nanotube (p-SWCNTs) and poly (methyl methacrylate) (PMMA) polymer nanocomposites were prepared by solution casting method. The effects of functionalization and sodium dodecyl sulfate (SDS) on the thermal properties of PMMA/p-SWCNT nanocomposites were investigated. Samples were characterised using BET, FTIR-ATR, SEM, DTA/TG, DSC, TEM and AFM. Morphological analyses showed that changes in the structure of SWCNTs with modification occurred and CNTs were tubular structure, homogeneously dispersed and nano-sized. Functionalised SWCNTs increased the first mass loss (Tmax1), the second mass loss (Tmax2) and glass transition temperatures (Tg) of PMMA. SDS assisted both better dispersion of CNTs and interaction between PMMA and CNTs. While PMMA/p-SWCNT-OH (0.1 wt.%) had the highest thermal stability in SDS-free medium, PMMA/SDS/p-SWCNT-O-APTS (0.1 wt.%) had the highest thermal stability in SDS medium. The maximum increases at Tmax1 and Tmax2 temperatures of nanocomposites were calculated as 49 and 13°C for PMMA/SDS/p-SWCNT-O-APTS (0.1 wt.%), respectively.

Synthesis, characterization, thermophysical properties and shape stability of paraffin/CNTs nanocomposite phase change materials

Paraffin/carbon nanotube (Pa/CNTs) nanocomposite with different CNTs lengths was prepared in order to investigate the change of thermophysical properties of paraffin phase change material (PCM). For this purpose, CNTs were first treated with sulfuric and nitric acids, which reduced the length of CNTs. Then, for complete dispersion of CNTs in paraffin, secondary functionalization was done using dodecylamine and they were added to paraffin with different wt.%. In order to stabilize the shape of paraffin, composites were inserted into graphene aerogel by vacuum impregnation method. Experiments showed that with the increase in the wt.% of CNTs, the thermal conductivity of composites increases, and the highest increase of 26.92% was observed for the composite containing 1 h refluxed CNTs with 1.2 wt.% in solid paraffin. Also, with an increase in the wt.% of CNTs, the latent heat of melting and solidifying of the composite increased, but the specific heat decreased. The absorption capacity of paraffin by graphene aerogel was investigated and the maximum absorption capacity was observed for the composite containing 1 h refluxed CNTs with 0.6 wt.% which showed 36.11% increase compared to the pure paraffin. In addition, by performing the leakage test, it was observed that the GA/Pa/CNTs structure has very good shape stability.

Electrochemical behavior of GNP/CNT porous composite for supercapacitor

Herein, we systematically demonstrate the synergistic behavior of GNP/CNT composite as an electrode material. Uniform dispersion of CNTs effectively inhibits the restacking of GNP sheets, resulting in enhanced specific surface area, porosity, and conductivity. Moreover, CNT intercalation provides a porous and interconnected network for electrolyte ion transportation. As a result, GNP composite having 1.0 wt% multi-walled carbon nanotube (MWCNTs) shows specific capacitance up to 143 Fg−1 at 5 mVs−1, an improvement of 150% compared to pristine GNPs. The improved electrochemical performance implies that the proposed composite electrode is a promising candidate for supercapacitor application.

Effects of Orientation and Dispersion on Electrical Conductivity and Mechanical Properties of Carbon Nanotube/Polypropylene Composite.

The orientation and dispersion of nanoparticles can greatly influence the conductivity and mechanical properties of nanocomposites. In this study, the Polypropylene/ Carbon Nanotubes (PP/CNTs) nanocomposites were produced using three different molding methods, i.e., compression molding (CM), conventional injection molding (IM), and interval injection molding (IntM). Various CNTs content and shear conditions give CNTs different dispersion and orientation states. Then, three electrical percolation thresholds (4 wt.% CM, 6 wt.% IM, and 9 wt.% IntM) were obtained by various CNTs dispersion and orientations. Agglomerate dispersion (Adis), agglomerate orientation (Aori), and molecular orientation (Mori) are used to quantify the CNTs dispersion and orientation degree. IntM uses high shear to break the agglomerates and promote the Aori, Mori, and Adis. Large Aori and Mori can create a path along the flow direction, which lead to an electrical anisotropy of nearly six orders of magnitude in the flow and transverse direction. On the other hand, when CM and IM samples already build the conductive network, IntM can triple the Adis and destroy the network. Moreover, mechanical properties are also been discussed, such as the increase in tensile strength with Aori and Mori but showing independence with Adis. This paper proves that the high dispersion of CNTs agglomerate goes against forming a conductivity network. At the same time, the increased orientation of CNTs causes the electric current to flow only in the orientation direction. It helps to prepare PP/CNTs nanocomposites on demand by understanding the influence of CNTs dispersion and orientation on mechanical and electrical properties.

Highly conductive polystyrene/carbon nanotube/PEDOT:PSS nanocomposite with segregated structure for electromagnetic interference shielding

Highly conductive polymer nanocomposites (CPNs) are promising alternatives to metals for electromagnetic interference (EMI) shielding applications. However, constructing a well-established conductive network within a polymer matrix using conventional processes is still challenging. This research aimed to improve the EMI shielding performance of CPNs by developing highly conductive segregated structures through a facile innovative dispersion mixing process. The nanocomposites were fabricated by dispersing polystyrene beads (PS), CNT, and PEDOT:PSS in deionized water, followed by vacuum filtration, solvent treatment, and hot press molding. The employed technique effectively constructed a highly conductive network in the PS/CNT nanocomposite, resulting in the lowest ever reported percolation threshold of 0.009 vol% among CNT-based segregated structures. Moreover, adding PEDOT:PSS to the nanocomposite as an additional constituent significantly promoted the conductive network by improving the dispersion of CNTs and the interparticle contact. The PS/CNT/PEDOT:PSS (100:2:4 w/w/w) exhibited a high electrical conductivity of 2.352 S/cm with notable specific EMI shielding effectiveness (SE) of 55.7 dB/mm (with dominant absorption mechanism), which is among the best performance reported for CNT-based conductive segregated structures, to the best of our knowledge. In brief, this work proposed a novel approach of using a facile, cost-effective, and eco-friendly method to fabricate highly CPNs for EMI shielding applications.

Dispersion of Carbon Nanotubes Improved by Ball Milling to Prepare Functional Epoxy Nanocomposites

There has been an increase in interest in developing functional polymer composites based on green chemistry principles. The purpose of this study was to investigate the preparation of functional epoxy/carbon nanotube nanocomposites using ball milling methods. In contrast to mechanical mixing, ball milling promoted good dispersion of CNTs within the epoxy matrix, thereby improving their mechanical properties and electrical conductivity. In epoxy nanocomposites with ball milling, Young’s modulus and tensile strength were increased by 653% and 150%, respectively, when CNT loading was 1.0 vol%. Additionally, the ball milling of CNTs improves their dispersion, resulting in a low percolation threshold at 0.67 vol%. The epoxy/CNT film sensor that was produced using the ball milling approach not only exhibited high reliability and sensitivity to mechanical strains and impact loads, but also possessed the ability to self-detect damage, such as cracks, and accurately locate them. This study marks a notable milestone in the advancement of functional epoxy/CNT composites through the ball milling approach.

Highly flexible and multifunctional CNTs/TPU fiber strain sensor formed in one-step via wet spinning

Elastic conductive fiber, owing to its soft and stretchable capability, makes it an ideal material for a wearable strain sensor. However, the incompatibility between the ultra-stretchable polymer matrix and the rigid inorganic conductors results in poor stretchability, low conductivity stability, and complex operation process. To overcome these drawbacks, high-stretched carbon nanotubes/thermoplastic polyurethane (CNTs/TPU) composite fibers have been fabricated through wet spinning in a simple one-step approach. By introducing rotating aqueous dispersion of CNTs as coagulating bath, the squeezed out TPU spinning solution could sufficiently adhere surrounding CNTs during double diffusion process of solvent and non-solvent medium. It has been demonstrated that the strain performance, strain sensing performance, and stability could be promoted by optimizing the rotation speed of the solidification bath. After being drafted and solidified in the bath with a rotation speed of 800 r/min (S-8), the obtained fiber has exhibited an outstanding working strain range of 200%, short response time of ≈ 0.18 s, and cyclic strain sensing performance. Besides, the obtained fiber has also exhibited exceptional Joule heating performance.