ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xin-Xin Dong,Yuan-Ming Cao,Cheng Wang,Bin Wu,Mi Zheng,Yang-Biao Xue,Wei Li,Bin Han,Min Zheng,Zuo-Shan Wang,Ming-Peng Zhuo
Multifunctional and long-term stable wearable heating systems have attracted extensive attention from experts, yet smart textiles that only rely on harvesting the body’s heat without additional energy still face huge challenges in practical applications. Herein, we rationally prepared the monolayer MXene Ti3C2Tx nanosheets via an in situ hydrofluoric acid generation method, which was further employed to construct a wearable heating system of MXene @ polyester polyurethane blend fabrics (MP textile) for the passive personal thermal management through a simple spraying process. Owing to the unique two-dimensional (2D) structure, the MP textile presents the desired mid-infrared emissivity, which could efficiently suppress the thermal radiation loss from the human body. Notably, the MP textile with an MXene concentration of 28 mg/mL exhibits a low mid-infrared emissivity of 19.53% at 7–14 μm. Significantly, these prepared MP textiles demonstrate an enhanced temperature of more than 6.83 °C compared with those of favorably traditional fabrics, involving the black polyester fabric, pristine polyester polyurethane blend fabric (PU/PET), and cotton, suggesting a charming indoor passive radiative heating performance. The temperature of real human skin covered by MP textile is 2.68 °C higher than that covered by cotton fabric. Impressively, these prepared MP textiles simultaneously possess attractive breathability, moisture permeability, mechanical strength, and washability, which provide new insight into human body temperature regulation and physical health.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
·
IF 10.9
Leini Wang,Gang He,Wenhao Wang,Xiaofen Xu,Shanshan Jiang,Elvira Fortunato,Rodrigo Martins
The homojunction based on Ti 3 C 2 T x MXene-doped In 2 O 3 and indium oxide as the channel layer is realized in high-performance metal oxide thin film transistors (TFTs). Doping of MXene into In 2 O 3 results in n-type semiconductor behavior, realizing tunable work function of In 2 O 3 from 5.11 to 4.79 eV as MXene content increases from 0 to 2 wt.%. MXene-doped In 2 O 3 -based homojunction TFT presents optimal performance with electron mobilities of greater than 27.10 cm 2 /(V s) at 240 °C, far exceeding the maximum mobility of 3.91 cm 2 /(V s) for single-layer In 2 O 3 TFTs. The improved performance originates from boosting of a two-dimensional electron gas (2DEG) formed at carefully engineered In 2 O 3 /MXene-doped In 2 O 3 oxide homojunction interface. Besides, the transformation in conduction mechanism leads to better stability of MXene-doped In 2 O 3 homojunction devices compared to undoped bilayer In 2 O 3 . Low-frequency noise further illustrates that doping MXene into In 2 O 3 helps to reduce the device trap density, demonstrating excellent electrical performance. A resistor-loaded unipolar inverter based on In 2 O 3 /0.5% MXene-In 2 O 3 TFT has demonstrated full swing characteristics and a high gain of 13. The effective doping of MXene into constructed homojunction TFTs not only contributes to improved stability, but also provides an effective strategy for designing novel homojunction TFTs for low-cost oxide-based electronics.
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Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 2
·1-15
·
IF 20.1
Miao Baoji,Cao Yange,Zhu Qingsong,Nawaz Muhammad Asif,Ordiozola Jose Antonio,Reina Tomas Ramirez,Bai Zhiming,Ren Junna,Wei Fengchun
The signal crosstalk and electromagnetic interference (EMI) problems direly need to be resolved in the rapid development of modern microwave communication technology for a better working frequency and transmission power of electronic systems. Where the new absorbing materials such as molybdenum disulfide (MoS 2 )/titania (TiO 2 )/Ti 2 CT x and MoS 2 /Ti 2 CT x composites could meet the requirement of “thin, strong, light weight, and wide band” for excellent absorbing performance. In this work, a lighter Ti 2 CT x material was selected as the matrix, and MoS 2 was in-situ grown on Ti 2 CT x matrix by traditional hydrothermal method and microwave solvothermal method. The fabricated composite exhibited synergic effect of two-dimensional heterostructural interface and double dielectric elements, where a small amount of TiO 2 and a certain proportion of MoS 2 jointly improve the impedance matching of the composite material. In here, the extreme reflection loss (RL min ) can reach − 54.70 dB (with a frequency of 7.59 GHz, 3.39 mm thickness), and the maximum effective absorption bandwidth (EAB max ) can reach 4 GHz. Polyethylene glycol 200 was used as the solvent instead of water to make Ti 2 CT x less oxidized during the composite process, where the microwave heating would attain fast speed, short time, high efficiency, and uniform product. Since, the MoS 2 /Ti 2 CT x composite without oxidizing possessed a wider effective absorption bandwidth (EAB) at a thinner thickness, thus resulting in the excellent microwave absorption performance and confirming the validity and rationality of new microwave absorption materials.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Quan-Fu Li,Xu Chen,Hai Wang,Ming Liu,Hui-Ling Peng
Wearable non-invasive sensors facilitate the continuous measurement of glucose in sweat for the treatment and management of diabetes. However, the catalysis of glucose and sweat sampling are challenges in the development of efficient wearable glucose sensors. Herein, we report a flexible wearable non-enzymatic electrochemical sensor for continuous glucose detection in sweat. We synthesized a catalyst (Pt/MXene) by the hybridization of Pt nanoparticles onto MXene (Ti3C2Tx) nanosheets with a broad linear range of glucose detection (0–8 mmol/L) under neutral conditions. Furthermore, we optimized the structure of the sensor by immobilizing Pt/MXene with a conductive hydrogel to enhance the stability of the sensor. Based on Pt/MXene and the optimized structure, we fabricated a flexible wearable glucose sensor by integrating a microfluidic patch for sweat collection onto a flexible sensor. We evaluated the utility of the sensor for the detection of glucose in sweat, and the sensor could detect the glucose change with the replenishment and consumption of energy by the body, and a similar trend was observed in the blood. An in vivo glucose test in sweat indicated that the fabricated sensor is promising for the continuous measurement of glucose, which is essential for the treatment and management of diabetes.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yue Tian,Ying Li,Chuqiao Hu,Yaqian Yang,Di Chen,Guozhen Shen
Weak-light detection technology is widely used in various fields, including industry, high-energy physics, precision analysis, and reflection imaging. Metal–semiconductor–metal (MSM) photodetectors demonstrate high detectivity and high response speed and are one of the suitable structures for the preparation of weak-light detectors. However, traditional MSM photodetectors tend to exhibit high dark currents, which are not conducive to performance improvement. Here, a MXene–Cs3Bi2I9–MXene weak-light detector is proposed. Based on the MXene–Cs3Bi2I9 Schottky junctions, the dark current is reduced by 2 orders of magnitude and the responsivity is significantly improved compared with the traditional Cr/Au–Cs3Bi2I9–Cr/Au MSM photodetector. The device demonstrates excellent photodetection capacity with a photoresponsivity of 6.45 A W–1, a specific detectivity of 9.45 × 1011 Jones, and a fast response speed of 0.27/2.32 ms. Especially, the device yielded a superior weak-light detectable limit of 10.66 nW cm–2 and demonstrated excellent optical communication capability. Moreover, such a flexible device shows little degradation in photodetection performance after extreme bending for 4500 cycles, proving remarkable bending endurance and flexibility. The obtained results highlight the great potential of such Cs3Bi2I9/MXene devices as a stable and environmentally friendly candidate for weak-light detection.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kaili Gong,Lian Yin,Congling Shi,Xiaodong Qian,Keqing Zhou
It is challenging that the functionalized MXene-based nanofillers are designed to modify the inherent flammability and poor toughness of epoxy polymeric materials and further to facilitate the application of EP composites. Herein, silicon-reinforced Ti 3 C 2 T x MXene-based nanoarchitectures (MXene@SiO 2 ) are synthesized by simple self-growth method, and its enhancement effects on epoxy resin (EP) are investigated. The as-prepared nanoarchitectures realize homogeneous dispersion in EP matrix, indicating well performance-enhancing potential. The incorporation of MXene@SiO 2 achieves improved thermal stability for EP composites with higher T -5% and lower R max values. Moreover, EP/2 wt% MXene@SiO 2 composites obtain a 30.2% and 34.0% reduction in peak heat release rate (PHRR) and peak smoke production rate (PSPR) compared to those of pure EP, respectively, also achieving a 52.5% fall in smoke factor (SF) values and increased yield and stability of chars. The dual char-forming effects of MXene@SiO 2 nanoarchitectures, including the catalytic charring of MXene and the migration of SiO 2 to induce charring, are accounted for the results, as well as lamellar barrier effects. Additionally, EP/MXene@SiO 2 composites achieve an enhanced storage modulus of 51.5%, along with improved tensile strength and elongation at break, compared to those of pure EP.
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2D Materials
·
2023
·Vol. 10
·期 2
·024007
·
IF 5.5
Mingtao Zhang,Meng Su,Yijing Qin,Chuntai Liu,Changyu Shen,Jun Ma,Xianhu Liu
The frequent oil spill accidents during oil exploration and transportation have caused large economic loss and catastrophic environmental disasters. Due to low cost and simplicity, adsorption and filtration materials are often chosen to deal with oil spills, but the outcomes are not satisfactory mainly because of the awfully high viscosity of crude oil. Herein a photothermal ultra-high molecular weight polyethylene/MXene composite aerogel with a high light absorption (99.97%) and water repellency (water contact angle >148°) is developed by thermally induced phase separation method. The composite aerogel endows durable hydrophobicity with which the water contact angle is more than 142° in acidic/alkaline environments, and the maximum absorption capacity of 81 g g−1. In addition, it exhibits an excellent photothermal performance, rising surface temperature to 70 °C within 60 s under 1 sun irradiation, that can drastically reduce the crude oil absorption time from 60 min to 60 s, saving 98% of absorption time and reaching a crude oil absorption capacity of 21 g g−1. More interestingly, the designed solar evaporation device with the obtained composite aerogel can achieve an evaporation rate of 1.15 kg m−2h−1 and evaporation efficiency of 74%. The designed composite aerogel opens a possible pathway for solar-powered crude oil adsorption applications.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 14
·4614-4622
·
IF 6.4
Xingmin Liu,Jinling Tong,Jijie Wang,Shaowei Lu,Dongxu Yang,Hongmei Li,Chunzhong Liu,Yutong Song
Flexible piezoelectric pressure sensors have a great application prospect in wearable electronic products due to the advantages of low cost, fast response speed and a self-powered system. However, traditional films based on piezoelectric ceramic/polymer materials face problems such as poor dispersion and insufficient polarization, which hinder the piezoelectric performance of pressure sensors. In this work, MXene was introduced to modify the surface of barium titanate (BaTiO3), which was blended with poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) matrix. An electrospinning method was adapted to fabricate BaTiO3/MXene/PVDF-TrFE composite films. This work proposed a new microscopic sensing mechanism. In addition, this MXene-modification strategy could improve the dispersion of BaTiO3 into the PVDF-TrFE matrix, increase the polarization efficiency and enhance the piezoelectric performance of the sensors. The results showed that the composite film with 0.15 wt% MXene could achieve a remarkable output voltage of 7.6 V. In addition, the tensile strength of the composite film with 0.15 wt% MXene (20.8 MPa) was 77.8% higher than that without MXene (11.7 MPa). Meanwhile, the β phase content of the composite film could reach 81.04%, and the crystallinity increased from 39.49% to 50.31%. The fabricated piezoelectric pressure sensor had a wide detection range (0.2–400 kPa) and a short response time (56 ms). Besides, even after undergoing over 5000 compression cycles, it maintained a stable piezoelectric response. This pressure sensor could quickly respond to joint movements and strenuous exercises in humans. Therefore, this pressure sensor showed great advantages and potential in the application of human motion monitoring.
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ACS Applied Electronic Materials
·
2023
·
IF 4.7
Hai Jiang,Mei Qin,Cheng Zhang,Zhiwei Weng,Jiabo Zhang,Xuan Weng
The implementation of tactile functions in array sensors has created an urgent need for high-performance force sensors with both high linearity and sensitivity so as to ensure the uniformity and accuracy of acquisition of multiple sensing units in the array sensors. In addition, it still remains challenging to fabricate exquisite geometric constructions for integrating highly sensitive materials, extraordinary sensitivity, high stretchability, wide sensing range, and flexibility into a single type of pressure/strain sensor. Herein, a sensitive flexible sensor was fabricated that was composed of mixed-dimensional MXene-based nanocomposites as piezoresistive layers and Ecoflex layers as the encapsulation. The resultant sensors with MXene (Ti3C2Tx)-ANF (aramid nanofiber)-BP (black phosphorus)-gold (Au) nanocomposites exhibited excellent electrical conductivity, ultrahigh press sensitivity of 0.4986 kPa–1 (0–1 kPa), reliable linearity (R2 = 0.998), rapid response time of 12 ms, excellent durability over 4000 cycles, and ultrahigh tensile sensitivity of 9188.583. An 8 × 8 pixel electronic skin was fabricated by the as-prepared mixed-dimensional MXene-based sensors and tested in the identification of sliding movements and surface shape, and the good performance shows great potential applications in the fields of wearable devices, human–machine interaction, and robotics.
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EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Jian-Bao Yang,Jing-Wen Wang,Guo-Chao Zhuang,Xin-Zhu Wang,Hou-Qing Wang,Ying-Jie Ma,Yang Zhang
It is critical for electromechanical polymer film to have excellent dielectric properties. In this research, two-dimensional MXene (Ti 3 C 2 T x ) nanosheets decorated with acidified carbon nanotubes (referred to here as CNT-COOH@Ti 3 C 2 T x ) were used as conductive fillers to prepare high dielectric constant acrylic resin elastomer (AE)-based percolative composite films. Physical blends of Ti 3 C 2 T x and AE (Ti 3 C 2 T x /AE) and CNT-COOH@Ti 3 C 2 T x /AE composite films with different volume fraction fillers were prepared by solution casting method, and their percolation thresholds ( f c ) were 1.38 vol% and 1.51 vol%, respectively. At 10 2 Hz, the dielectric constant of 1.42 vol% CNT-COOH@Ti 3 C 2 T x /AE is 120, which is 1.29 times that of 1.26 vol% Ti 3 C 2 T x /AE and 30 times that of AE. At the same time, the dielectric loss of 1.42 vol% CNT-COOH@Ti 3 C 2 T x /AE remains at a relatively low level (0.15 at 10 2 Hz). The significant increase in the dielectric constant of the composite is closely related to the miniature capacitor effect and interfacial polarization effect.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yixiang Chen,Xueli Fu,Yu Jiang,Wanqi Feng,Dan Yu,Wei Wang
Recently, the Ti 3 C 2 T x MXene-based flexible electronics have sparked wide attention in artificial health diagnosis, military security and human–machine interaction. High sensitivity, durability and multifunctionality are desired for strain sensors in long-term health detection. However, unevenness and low fastness of MXene and stretchable nanofibers lead to poor sensitivity and durability, building a strong interface to combine the two-dimensional (2D) MXene nanosheets uniformly along the 1D nanofibers and form a 3D connected electrical network benefits to the improvement of sensing performances. Herein, we propose a facile strategy to prepare a breathable and multifunctional all-nanofiber sensor based on MXene and styrene–butadiene–styrene (SBS) nanofibers. Firstly, the molecular chain of SBS introduces quaternary ammonium groups (NSBS) by thiol-ene click chemistry, hydrophilicity and mechanical properties of NSBS nanofibers are significantly improved, then MXene nanosheets can uniformly and firmly adsorb along with NSBS nanofibers by electrostatic interaction. The assembled MXene/NSBS sensor reaches an ultrahigh sensitivity of 62,194 in the wide detection range of 300% and stability over 3000 cycles for human joint motion, pulse and ECG signal wireless detection. Furthermore, the MXene/NSBS electrodes demonstrate temperature response and thermal management performance including Joule heating and photothermal performance. Consequently, this work indicates a promising candidate for real-time health diagnosis and artificial intelligence in next-generation multifunctional devices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Mengru Yao,Guiyin Zhang,Danchun Shao,Shan Ding,Lihua Li,Hong Li,Changren Zhou,Binghong Luo,Lu Lu
Currently, hemoperfusion is clinically the most rapid and effective treatment for removing toxins from the blood. The core of hemoperfusion is the sorbent inside the hemoperfusion device. Due to the complex composition of the blood, adsorbents tend to adsorb substances such as proteins in the blood (non-specific adsorption) while adsorbing toxins. Hyperbilirubinemia is caused by excessive levels of bilirubin in the human blood, causing irreversible damage to the patient's brain and nervous system, and even leading to death. High adsorption and high biocompatibility adsorbents with specific bilirubin adsorption are urgently needed to treat hyperbilirubinemia. Herein, poly(L-arginine) (PLA) which can specifically adsorb bilirubin, was introduced into chitin/MXene (Ch/MX) composite aerogel spheres. Ch/MX/PLA prepared by supercritical CO 2 technology had higher mechanical properties than Ch/MX and can withstand 50,000 times its own weight. The in vitro simulated hemoperfusion test showed that the adsorption capacity of Ch/MX/PLA was as high as 596.31 mg/g, which was 15.38 % higher than that of Ch/MX. Binary and ternary competitive adsorption tests showed that Ch/MX/PLA also had good adsorption capacity in the presence of a variety of interfering molecules. In addition, hemolysis rate testing and CCK-8 testing confirmed that Ch/MX/PLA had better biocompatibility and hemocompatibility. Ch/MX/PLA can meet the required properties of clinical hemoperfusion sorbents and has the ability to produce mass production. It has good application potential in the clinical treatment of hyperbilirubinemia.
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