POLYMER
·
2023
·
IF 4.6
Kefan Fan,Kun Li,Liuwenlin Han,Zhijian Yang,Junjiao Yang,Junying Zhang,Jue Cheng
The advent of hydrogel-based flexible strain sensors has generated enormous research interest due to their outstanding biocompatibility. However, developing hydrogel-based strain sensors with high gauge factor, wide detection range and multifunctional integration is still challenging. Here, a novel multifunctional hydrogel-based strain sensor is composed of two-dimensional transition metal carbides/nitrides (Ti 3 C 2 Tx MXene) and Polyacrylamide- co -Poly- N -hydroxyethylene acrylamide/Carboxy Methyl Cellulose-Fe 3+ dual network structure (PAAm-PHEMAA/CMC-Fe 3+ ) with multiple hydrogen bonds and coordination interactions. The dual network design endowed the hydrogel-based human motion sensor with fast rebound and high tensile properties , enabling it to exhibit high sensitivity (response time ∼120 ms and gauge factor ∼1.62), and a wide detection range (0–700%), including joint movements as well as more subtle human motions (facial micro-expression changes and speech). More importantly, the hydrogel-based strain sensor exhibited excellent EMI (41 dB, X-band) and UV shielding properties (365 nm, 100%, 0.5 mm) due to the synergy of porous structure, moderate conductivity, and ionic solution environment. Moreover, it demonstrated robust adhesion (29 kPa), high shape adaptability, and self-healing capability. This innovative multi-functional flexible sensor design provides guidance for the development, research and application of high-performance flexible wearable materials.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 7
·4373-4385
·
IF 5.7
Zhang Tianyi,Song Baiqing,Yang Jie,Yuan Binbin,Ma Jianhua
Multifunctional films have potential applications in smart wearable devices and portable electronic products. Yet, it is always a challenge to ensure these materials simultaneously to have flexible, strong, and functional properties during the material preparation process. Herein, bacterial cellulose/polydopamine modified by MXene (BC/PM) multi-layer films is prepared by vacuum-assisted self-assembly. The micromorphology, phase composition, and application performance of this composite film were systematically characterized. The mechanical properties test indicates that the BC/PM multi-layer film exhibits an excellent reinforcement effect. The tensile strength and elongation of the three-layer BC/PM film reach 181.6 MPa and 8.9%, respectively. For multifunctional applications, the BC/PM multi-layer film shows remarkable electric heating and excellent photothermal properties, for example, it can be heated up to 85 °C at a constant voltage of 6 V for 20 s, and its temperature can increase from room temperature to 90 ℃ after 250 W infrared lamp is irradiated for 30 s. Furthermore, the sample has potential high sensitivity and high response speed to humidity changes. This research will provide a data basis and theoretical reference for the practical application of bacterial cellulose-based multifunctional films.
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高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Linsheng Huang,Ziyan Dong,Changhao Wu,Yue Ma,Limin Ruan,Wei Zeng,Siliang Wang,Yi Xiong,Chao Xu,Dong Liang
The wire electrical conduction is a traditional method to transfer carriers from external circuit into internal functional materials in electronic devices, yet these guest carriers suffer ineluctable dissipation on their traveling paths before contributing device performance. Hereof, a wireless electrostatic induction strategy is developed to activate native carriers just inside MXene-based electrochemical supercapacitive device for facilitating carrier utilization. Experimental and simulative results reveal that in the device domains permeated by atmospheric electric field, the native carriers are effectively excited not only in porous MXene material, but also in metallic foil substrate and ionic electrolyte, endowing a huge energy capacity of 541.6 F g − 1 , greatly larger than 258.5 F g − 1 implemented by wire conductive charge. Further, the inducing system is explored to detect the atmospheric electric field strength with the highest sensitivity of 14.42 m μA V − 1 and high linearity of 95.22% in ranging 0–1100 V m − 1 and is also utilized to sense contactless proximity stimulus with a high sensitivity of 7.01 μA m − 1 and high linearity of 97.9% in penetration depth ranging 0∼20 cm. These smart functions are also realized with prototype equipment for applicable exploration.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yingnan Yang,Haifeng Yang,Pengfei Tang,Xiaodong Li,Weimiao Wang,Guangcheng Yang
Laser induced high temperature pulse (HTP) generation has been widely used in some high-immediacy applications requiring dramatic temperature changes. Recent years researchers put interest in light-to-heat (include photothermal, light induced exothermic reaction and combination of both) materials to reduce the initiating energy of the laser ignition. However, the laser energy for realizing sufficient light-to-heat conversion is still high. MXene exhibits excellent light absorption, high light-to-heat conversion efficiency and has abundant metastable atoms which trend to undergo exothermic chemical reactions, but its incomplete oxidation affects its total heat release when the laser power is relatively high. Herein, we have prepared a ZIF-67/Ti 3 C 2 MXene intercalated membrane. It is found that porous ZIF-67 exhibits a synergistic effect on MXene and can significantly improve its physical/chemical coupled HTP by enhancing its light absorption and subsequent energy release during its oxidation. ε 2,4,6,8,10,12-(hexanitrohexaaza) cyclododecane (ε-CL-20) laser ignition experiments prove that ZIF-67/Ti 3 C 2 MXene intercalated membrane exhibits better ignition performance than pure MXene membrane by reducing both ignition threshold (151.2 mJ) and ignition delay (21 ms) at a low laser power intensity (59.7 W/cm 2 ). This work can provide an insight for the structural design of new light-to-heat membranes.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yanhua Ma,Dongzhi Zhang,Zihu Wang,Hao Zhang,Hui Xia,Ruiyuan Mao,Haolin Cai,Huixin Luan
Flexible strain sensors based on self-adhesive, high-tensile, super-sensitive conductive hydrogels have promising application in human–computer interaction and motion monitoring. Traditional strain sensors have difficulty in balancing mechanical strength, detection function, and sensitivity, which brings challenges to their practical applications. In this work, the double network hydrogel composed of polyacrylamide (PAM) and sodium alginate (SA) was prepared, and MXene and sucrose were used as conductive materials and network reinforcing materials, respectively. Sucrose can effectively enhance the mechanical performance of the hydrogels and improve the ability to withstand harsh conditions. The hydrogel strain sensor has excellent tensile properties (strain >2500%), high sensitivity with a gauge factor of 3.76 at 1400% strain, reliable repeatability, self-adhesion, and anti-freezing ability. Highly sensitive hydrogels can be assembled into motion detection sensors that can distinguish between various strong or subtle movements of the human body, such as joint flexion and throat vibration. In addition, the sensor can be applied in handwriting recognition of English letters by using the fully convolutional network (FCN) algorithm and achieved the high accuracy of 98.1% for handwriting recognition. The as-prepared hydrogel strain sensor has broad prospect in motion detection and human–machine interaction, which provides great potential application of flexible wearable devices.
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PubMed
高影响因子
Nano-Micro Letters
·
2023
·Vol. 15
·期 1
·1-14
·
IF 26.6
Xu Ting,Song Qun,Liu Kun,Liu Huayu,Pan Junjie,Liu Wei,Dai Lin,Zhang Meng,Wang Yaxuan,Si Chuanling,Du Haishun,Zhang Kai
Multifunctional architecture with intriguing structural design is highly desired for realizing the promising performances in wearable sensors and flexible energy storage devices. Cellulose nanofiber (CNF) is employed for assisting in building conductive, hyperelastic, and ultralight Ti 3 C 2 T x MXene hybrid aerogels with oriented tracheid-like texture. The biomimetic hybrid aerogels are constructed by a facile bidirectional freezing strategy with CNF, carbon nanotube (CNT), and MXene based on synergistic electrostatic interaction and hydrogen bonding. Entangled CNF and CNT “mortars” bonded with MXene “bricks” of the tracheid structure produce good interfacial binding, and superior mechanical strength (up to 80% compressibility and extraordinary fatigue resistance of 1000 cycles at 50% strain). Benefiting from the biomimetic texture, CNF/CNT/MXene aerogel shows ultralow density of 7.48 mg cm −3 and excellent electrical conductivity (~ 2400 S m −1 ). Used as pressure sensors, such aerogels exhibit appealing sensitivity performance with the linear sensitivity up to 817.3 kPa −1 , which affords their application in monitoring body surface information and detecting human motion. Furthermore, the aerogels can also act as electrode materials of compressive solid-state supercapacitors that reveal satisfactory electrochemical performance (849.2 mF cm −2 at 0.8 mA cm −2 ) and superior long cycle compression performance (88% after 10,000 cycles at a compressive strain of 30%).
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qingbo Xu,Xinyu Wang,Yanyan Zhang,Peng Wang,Zhi Liu,Qingping Song,Yanyan Sun
Conductive and thermal cotton fabrics have a great potential in the field of wearable textiles, in particular, warm textiles. However, poor durability and low wearability have hindered the practical application of conductive and thermal cotton fabrics. In this study, a cotton fabric with excellent conductive and thermal properties was prepared by coating with silver nanoparticles (Ag NPs), MXene , and polydimethylsiloxane (PDMS). The Ag NPs and MXene coatings endowed the cotton fabric with excellent conductive and thermal properties, while the PDMS coating endowed the conductive and thermal fabric with mechanical and chemical durability. As a result, the surface resistance of the finished cotton fabric reached 23.4 ± 1.7 Ω/sq, exhibiting excellent conductive properties. In addition, the temperature of the cotton fabric was improved a short time (<96.0 s) after the application of a low voltage, and the temperature increase of the fabric could be controlled by adjusting the time. Moreover, the inherent properties of the finished cotton fabric were retained to a significant extent after the finishing process. Therefore, it is believed that the fabricated cotton fabric has great potential for application in conductive and warm textiles.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Zhaomei Yang,Qingquan Lin,Guangyong Zeng,Simiao Zhao,Guilong Yan,Micah Belle Marie Yap Ang,Yu-Hsuan Chiao,Shengyan Pu
Membrane separation technology is an effective treatment for complex wastewater. However, severe membrane fouling restricts its practical application. Photocatalytic composite membranes with self-cleaning properties can efficaciously ease the membrane fouling. Herein, we constructed an advanced ternary heterojunction photocatalytic composite membrane by coupling MXene , Bi 2 MoO 6 and BiOBr nanomaterials . The prepared BiOBr/Bi 2 MoO 6 @MXene composite membrane had a high permeability (1296.91 L⋅m −2 ⋅h −1 ⋅bar −1 ) and exhibited excellent comprehensive removal ratios for antibiotics and dyes (Tetracycline hydrochloride and Ciprofloxacin: ≥90%, Congo red: >98%). During the self-cleaning performance test, the composite membrane maintained high permeability and selectivity after 5 cycles. Density functional theory calculation (DFT) analysis revealed that the enhanced photocatalytic activity was attributed to the efficient separation of electron-hole pairs between the ternary heterojunctions. This integrated membrane with both membrane separation and photocatalysis has good application prospects in the removal of various pollutants in the wastewater field.
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高影响因子
Nanoscale
·
2022
·Vol. 15
·期 6
·2624-2632
·
IF 8.307
Weijia Liu,La Li,Guozhen Shen
Frequently used aqueous electrolytes in MXene-based Zn-ion hybrid microsupercapacitors (MSCs) limit their cycling and rate stability. The use of metal and nonmetal additives in electrolytes for the performance improvement of Zn-ion MSCs is considered a valid method. Herein, we propose an additive assisted Zn(CF3SO3)2 electrolyte as a redox-active electrolyte to prepare a flexible MXene-based Zn-ion hybrid MSC by a facile spraying method, and it consists of a conductive Ti3C2Tx–LiCl current collector and a Ti3C2Tx–DMSO cathode. In the process of the current density change (from 5 A cm−3 to 30 A cm−3 and then to 5 A cm−3), the capacity retention of the as-fabricated MSC with K3Co(CN)6 additive is over 99.0%, which is higher than 96.7% for the MSC with CKNSe additive and 82.3% for the MSC without an additive. Moreover, the designed MSC with the redox-active K3Co(CN)6 electrolyte exhibits a maximal capacitance retention of 70% after 5000 cycles. Furthermore, the flexible Zn-ion MSC with the Ti3C2Tx MXene cathode and a redox-active electrolyte was used to power a Ti3C2Tx based pressure sensor; the excellent press response of the integrated system not only provides insights into the development of large capacity and long-period stable energy storage devices, but also paves a new way for the development of capacitor-sensor integrated systems.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Yu Zhang,Qiang Gao,Xianzhe Sheng,Shuai Zhang,Junjie Chen,Yan Ma,Jianbin Qin,Yongsheng Zhao,Xuetao Shi,Guangcheng Zhang
The design and fabrication of electromagnetic interference shielding films with a novel structure to eliminate undesirable electromagnetic pollution is an important research direction. However, it is still a challenge to combine and organize nanofillers in different dimensions into the structured network in polymer-based electromagnetic interference (EMI) shielding composites. In this work, a sandwich structure polyimide (PI) composite film with alternative 2D-MXene network and 1D-Silver nanowires (Ag NWs) network was prepared through the “electrospinning-immersion-hot pressing” method. With the increase of Ag NWs content, the EMI shielding effectiveness (SE) gradually increases while maintaining good flexibility and mechanical robustness. The EMI SE and the tensile strength of 150 μm thick sandwich composite film can reach up to 79.54 dB and 39.82 MPa, respectively. The prepared flexible and robust PI composite film with a sandwich structure has high EMI SE with less metal content, which can provide guidelines for the development of high-performance EMI polymeric films with potentials in wearable devices and equipment.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chunqing Yang,Dongzhi Zhang,Dongyue Wang,Huixin Luan,Xiaoya Chen,Weiyu Yan
Flexible strain sensors have significant progress in the fields of human–computer interaction, medical monitoring, and handwriting recognition, but they also face many challenges such as the capture of weak signals, comprehensive acquisition of the information, and accurate recognition. Flexible strain sensors can sense externally applied deformations, accurately measure human motion and physiological signals, and record signal characteristics of handwritten text. Herein, we prepare a sandwich-structured flexible strain sensor based on an MXene/polypyrrole/hydroxyethyl cellulose (MXene/PPy/HEC) conductive material and a PDMS flexible substrate. The sensor features a wide linear strain detection range (0–94%), high sensitivity (gauge factor 357.5), reliable repeatability (>1300 cycles), ultrafast response–recovery time (300 ms), and other excellent sensing properties. The MXene/PPy/HEC sensor can detect human physiological activities, exhibiting excellent performance in measuring external strain changes and real-time motion detection. In addition, the signals of English words, Arabic numerals, and Chinese characters handwritten by volunteers measured by the MXene/PPy/HEC sensor have unique characteristics. Through machine learning technology, different handwritten characters are successfully identified, and the recognition accuracy is higher than 96%. The results show that the MXene/PPy/HEC sensor has a significant impact in the fields of human motion detection, medical and health monitoring, and handwriting recognition.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Enxiang Jiao,Ziru Sun,Hangzhen Zhang,Yifei Wu,Yuanbiao Liu,Kai Guo,Haijun Zhang
The development of thermal interface materials (TIMs) with excellent mechanical properties and efficient heat dissipation capability has become very necessary for the next generation of integrated electronics and flexible devices. Herein, a covalently cross-linked cellulose nanofiber/MXene/single-walled carbon nanotube (CNF/MXene/SWCNT-KH550, K-CMC) nanocomposite film was successfully fabricated by vacuum-assisted self-assembly method. This unique cross-linked ternary narce-like structure greatly promoted the load transfer and energy dissipation between the components, thereby improving the mechanical properties of K-CMC nanocomposite films. CNF/MXene/2wt%SWCNT-KH550(K-CMC2) nanocomposite film exhibits superior tensile strength of 255.1 MPa and satisfactory toughness of 3.9 MJ/m 3 . Additionally, strong covalent cross-linking network also effectively promotes the transfer of phonons between the components, notably in both vertical and horizontal directions. The K-CMC2 nanocomposite film exhibits in-plane thermal conductivity of 25.06 W m −1 K −1 and through-plane thermal conductivity of 1.64 W m −1 K −1 , which enhanced 871% and 680% relative to the pure CNF film, respectively. The effective medium theory (EMT) proves that the formation of covalent cross-linked network effectively reduces the interfacial thermal resistance by 31.35%. These superior comprehensive properties endow the K-CMC nanocomposite films with great potential in the field of high power electronics.
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高影响因子
危险品化学品经营许可证（带存储）