Materials Today Communications
·
2025
·
IF 4.5
Xue Zhang,Shengbin Cao,Xiaosong Liu,Tianchan Jia
Flexible sensors have garnered significant attention due to their potential applications in monitoring human physiological signals, wearable devices, and healthcare. In this study, the dip coating method was employed to fabricate a flexible piezoresistive pressure sensor based on graphene/MXene@polyurethane (PU) sponge. Leveraging the porous structure of PU sponge and the high conductivity and synergistic effects of graphene and MXene additives, this sensor can effectively monitor both small strain activities, such as speech recognition, and large strain activities, like elbow bending. Notably, this flexible pressure sensor exhibits high sensitivity (2.68 kPa −1 in the 0~15 kPa range), high stability (withstanding 8000 load cycles), a short response time (61 ms), and a wide detection range (0-100 kPa). These features endows the sensor with outstanding multifunctionality, making it highly adaptable and broadly applicable for monitoring human health vital signals, as well as for detecting motion and sound vibration.
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Materials Today
·
2025
·
IF 22
Bin Chen,Nan Jian,Junping Hu,Dianlun Wu,Yue Jiang,Xiaofeng Zhang,Jiatao Xie,Li Guo,Tao Song,Jiaen Huang,Shaojuan Luo,Wei Wei,Dongfeng Diao,Lina Li,Yingguo Yang,Deliang Zhu,Lei Wang,Yang Huang,Feng Rao
Two-dimensional (2D) MXenes are renowned for the unique feature of strong metallic conductivity, whereas the lack of semiconductive nature has become a crucial bottleneck that impedes MXenes’ rapid development in electronic devices. The challenge mainly comes from the stringent requirements for specific 2D compositions, whose synthesis and/or exfoliation techniques are too difficult to succeed. Here we proposed a facile and universal approach for fabricating semiconductive MXenes. Our demonstration showed that through hydrothermal-assisted intercalation treatment of the prototypical MXene-Ti 3 C 2 T x , shallow and deep Ti-lattice vacancies can be generated in its 2D nanosheets, weakening the original strong metallicity and even facilitating the wide-bandgap semiconductivity. Reciprocating bias polarization on the semiconductive 2D-Ti 3 C 2 T x nanosheet can induce reversible electrochemical-like migration of the surface anionic ligands, which enables high-nonlinearity and ultralow-current electrical switching capabilities for potential volatile selector applications. Our idea opens a new avenue for tuning the physical and chemical properties of MXenes, promoting their wide applications, especially in the field of 2D electronics.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Anqi Zhou,Ziyi Wu,Qiaoqiao Bai,Xianghong Zhang,Xiaowei Li,Hengxin Shen,Huimin Li,Tang Liu,Song Liu
Flexible pressure-temperature dual-functional sensors are crucial for healthcare monitoring and human-machine interfaces, yet their development is hindered by inherent signal interference. To address this challenge, this study presents a flexible, dual-functional sensor that achieves decoupled pressure and temperature detection through a novel heterogeneous sensing architecture. The device integrates a piezoresistive MXene/cellulose nanofiber/chitosan (MCC) composite film with a thermochromic PDMS layer, enabling simultaneous electrical and visual signal outputs. The MCC film exhibits high sensitivity (35.7 kPa −1 ), rapid response (0.25 s), ultralow detection limit (6.5 Pa), and excellent durability (>4400 cycles). The thermochromic layer provides reversible, color-based temperature feedback, ensuring minimal signal interference. This decoupled sensing strategy enables accurate monitoring of physiological signals—including pulse waveforms, respiration, and fracture healing—with strong correlation to clinical indicators. The sensor's simplicity, scalability, and multifunctionality position it as a promising platform for next-generation wearable healthcare technologies.
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FIBERS AND POLYMERS
·
2025
·
IF 2.3
Qu Sitian,Lin Tao,Yin Xuefeng,Xing Luyi,Li Chenyang,Peng Guoqiang
The rapid advancement of information technology has led to an increase in electromagnetic interference (EMI) issues, as electronic devices are now widely utilized, requiring materials with greater versatility. This study developed an efficient preparation method utilizing alternating vacuum filtration (AVF) technology to overcome this issue. Through the precise control of the deposition sequence of cellulose nanofibers (CNF)/Na-bentonite (NB) and MXene conductive layers, this study successfully prepared CNF/NB–MXene composite films with a well-structured alternating layered structure. The composite film exhibited a distinctive "brick–mortar" architecture, imparting favorable mechanical properties (i.e., 8.17 MPa tensile strength). Measuring 41 μm thick, the composite film exhibited a conductivity of 189.6 S m –1 , along with EMI shielding effectiveness (SE) of 34.3 dB and SE per unit thickness (SE/t) of 8365.85 dB cm –1 in the X-band. Furthermore, the composite film demonstrated a high limiting oxygen index (LOI) of 36.5% and a residual carbon content exceeding 70%, which indicated exceptional flame retardancy. Consequently, the alternating layered composite film exhibited superior EMI performance and flame-retardant performance, making it particularly advantageous in harsh environments such as high temperatures.
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IONICS
·
2025
·
IF 2.6
Ding Zhengyu,You Maoyu,Xin Binjie,Newton Amin
Supercapacitors require electrode materials that integrate high specific capacitance, and efficient ionic transport. Herein, a novel MXene/short carbon nanofiber@polyaniline (MSCPM) hybrid membrane was synthesized via chemical oxidative polymerization and vacuum-assisted filtration. By optimizing the mass ratio of MXene to short carbon nanofiber@polyaniline (SCNF@PANI), a three-dimensional hierarchical architecture was achieved, where MXene nanosheets interlocked with PANI-coated CNFs to form covalent interface bonds. This design leverages the metallic conductivity of MXenes for rapid electron transport, CNFs’ mechanical rigidity of CNFs to maintain structural integrity, and PANI’s pseudo-capacitance of PANI for enhanced energy storage. The hybrid membrane exhibited exceptional electrochemical performance, achieving a specific capacitance of 601.8 F g − 1 at 5 mV s − 1 , surpassing most reported MXene-based materials. Notably, the composite retained 81.5% of its capacitance after 10,000 cycles, demonstrating remarkable cycling stability. The synergistic integration of hydrophilic MXenes, porous CNFs, and polar PANI functionalities ensures efficient electrolyte infiltration and ion diffusion. Simultaneously, the covalent interface bonds enhance the charge transfer efficiency and structural integrity. This work establishes a scalable strategy for high-performance supercapacitor electrodes, advancing the integration of MXenes with carbon nanomaterials and conductive polymers. These design principles provide new insights into interfacial engineering for multifunctional energy storage applications, particularly in high-temperature devices.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Sen Lin,Hao Zhang,Jiuqi Sun,Xuliang Lu,Zhiwei Tuo,Zhaohua Lin,Suqian Ma,Yunhong Liang
The development of flexible materials with green actuation, rapid responsiveness, and environmental adaptability is vital for next-generation intelligent actuators. Here, we report a humidity-responsive composite film based on the synergistic assembly of agarose (AG), Ti₃C₂Tₓ MXene, and aminated multi-walled carbon nanotubes (MWCNTs-NH₂). Dual crosslinking with Ca²⁺ and glutaraldehyde (GA) yields a dense, stable, multiscale network (AMC-CG) that enhances structural integrity and water transport. The AMC-CG film exhibits excellent thermal stability and mechanical strength. Under a 35 % humidity gradient, it achieves a maximum bending angle of 166.99°, a response speed of 282.81° s⁻¹ , and a recovery speed of 42.96° s⁻¹ , maintaining performance over 500 cycles. It also shows strong anti-swelling behavior in pH-extreme solutions and retains actuation in dusty and oily environments. A soft gripper system built with AMC-CG enables autonomous object manipulation in confined spaces, highlighting its low-power, programmable, and eco-friendly potential. and expanding the application of humidity-responsive actuators toward microoperation devices and flexible actuation systems.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yangmiao Shen,Junhe Zhang,Fanglan Guan,Jianming Wang,Xin Li,Tianjiao Zhang
Since the discovery of Graphene sheets, Graphene fiber- and MXene fiber-based supercapacitors (GFSCs) have undergone significant advancements in flexible fiber power. However, a key hurdle for GFSCs to be used in the electrical textile is the bad energy density and significant performance degradation at low temperatures. Herein, vertically oriented MXene/PEDOT:PSS/RGO (MPG) hybrid fibers were attained with wet spinning method on the basis of investigating the rheological properties of MXene, PEDOT:PSS, and GO dope combined with CFD simulations. The azimuthal profile of the 2D SAXs reveals a distinct peak at 90°, with a Herman's orientation factor of 0.7. The MPG fiber containing ~42 wt% MXene achieves a balanced tensile strength of 173 MPa and an electronic conductivity of 400 S/cm. The 42 wt% MXene MPG FSCs exhibit distinguished energy density of 100 mWh cm −3 , which exceeds those of previously reported Ti 3 C 2 T x MXene-based FSCs. To enhance the low-temperature electrochemical performance of MPG FSCs, solid electrolyte nano-AgI is grafted onto the fiber surface with 60 Co γ-ray. At −0,-20, −40 and − 60 °C, the assembled MGP FSCs maintain energy densities of 59, 38, 16 mWh cm −3 and 880 μWh cm −3 respectively. Four MPG FSCs in series can light up six led for 53 s at −20 °C. These MPG FSCs exhibit their potential for wearable electronics in cold environments.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jie Gao,Li-Bo Huang,Xianghao Meng,Lei Xia,Fan Yi,Zexuan He,Zeyu Pei,Changting Hong,Guo Wang,Yuhan Wang,Zhongyi Jiang
Nanofiltration holds significant potential for mitigating water scarcity, yet reconciling high selectivity with efficient mass transfer remains a critical challenge. MXene membranes enable precise molecular sieving through interlayer spacing, while covalent organic framework (COF) membranes leverage penetrating pores for rapid mass transfer. However, MXene membranes suffer from restricted permeability and structural instability, whereas COF membranes face limitations in achieving small-sized pores and compromising sieving efficiency. Herein, we fabricate a heterostructured MXene/COF membrane by synergistically manipulating interlayer spacing of MXene with penetrating pores of COF via sequential vacuum-assisted self-assembly. Matched surface hydrophilicity and electrostatic property between MXene and COF render robust interfacial adhesion. The optimal MXene/COF membrane exhibits a water permeance of 356.6 ± 24.1 L m −2 h −1 bar −1 and a CR rejection of 99.8 %, along with excellent operational stability during 48-hour continuous filtration. The MXene/COF membrane opens a novel avenue for fabricating versatile heterostructured membranes for advanced separations.
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Materials Research Express
·
2025
·
IF 2.2
Jiale Huang,Zhiyin Cai,Jingjin Cai,Chengming Yu,Shanglin Xiang,Dongyu Cai
Printing technologies have enabled the low-cost and large-scale production of MXene-based transparent
conductive electrodes. Fabrication of inks with MXene monolayers in liquid phase for printing requires
bespoke centrifugation separation, and yield is low. MXene sediment, a byproduct of the centrifugation
separation process, is a rich source for creating concentrated MXene inks. However, removing impurities,
particularly lithium fluoride, from sediment remains a significant challenge for producing high-quality
inks. This study reported the first purification route for removing lithium fluoride from sediment by
controlling the addition of lithium fluoride during the etching of MAX precursors. This resulted in a
concentrated ink that produced large MXene monolayers. The vacuum filtered film had an ultra-high
conductivity of over 20000 S/cm. Gravure printing produced a TCE with a low sheet resistance of 560
Ω/sq and 84% transmittance, eliminating the need for annealing post-treatment.
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Smart Medicine
·
2025
·Vol. 4
·期 2
·e70006
·
IF 11.6
Zehua Gong,Linjie Chen,Xiaolei Zhou,Chunwu Zhang,Dražen Matičić,Dražen Vnuk,Zhifeng You,Linjin Li,Huaqiong Li
Osteoarthritis (OA) is a physical lubrication microenvironment-inadequate disease accompanied by a sustained chronic chemical inflammation microenvironment and the progression of articular cartilage destruction. Despite the promising OA treatment outcomes observed in the enhancement of lubrication inspired by ball bearings to reduce friction and support loads, the therapeutic effect of near-infrared (NIR) irradiation-based photothermal-responsive controlled release “smart hydrogel microspheres” on OA remains unclear. Here, we prepared MXene/NIPIAM-based photothermal-responsive injectable hydrogel microspheres encapsulating diclofenac sodium using a microfluidic system. Consequently, NIR irradiation-based photothermal-responsive controlled release “smart hydrogel microspheres” demonstrate beneficial therapeutic effects in the treatment of OA by modulating the physical lubrication and chemical chronic inflammation microenvironment, laying the foundation for the application of smart hydrogel microsphere delivery systems loaded with bioactive factors (including agents, cells, and factors) to regulate multiple pathological microenvironments in regenerative medicine.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Liu Ying,Ma Jianfeng,Guo Luyao,Xu Xinhua
Advanced sensation and actuation abilities of various living organisms in nature have inspired researchers to design bioinspired somatosensory soft actuators. However, the majority of conventional soft actuators primarily possess actuation capabilities while lacking real-time sensing signal feedback. Here, a promising strategy is reported to develop highly stretchable and conductive hydrogels for bioinspired somatosensory soft actuators, which integrate actuation and strain-sensing functions into a single materials system. The conductive hydrogels are designed and synthesized by in situ copolymerization of polydiallyldimethylammonium chloride functionalized MXene (P-MXene) nanosheets and poly N-isopropylacrylamide-co-acrylic acid (PNIPAm/PAA) hydrogels. The resulting hydrogels exhibit the dual-crosslinked conductive network and porous microstructure, enabling the seamless combination of excellent strain sensitivity, high conductivity, rapid responsiveness, high stability, and extensive stretchability. Interestingly, the anisotropic network structure, formed by electrically driven nanosheet gradient distribution of P-MXene nanosheets, endows the hydrogel with shape-programmable deformation, light-driven remote control, and self-sensing capability. As a proof-of-concept application, a soft gripper based on self-sensing hydrogel actuators has been developed, which can not only grasps, lifts, and releases objects but also detects its movement states by monitoring resistance variations. The proposed somatosensory soft actuator can offer promising perspectives for the advancement of smart soft robotics and other artificial intelligent devices.
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Polymers
·
2025
·Vol. 17
·期 11
·1493
·
IF 4.9
Na Meng,Jinxin Liu,Jialing Mi,Xuan Chen,Rong Rong,Junjie Hang,Zihan Jiang
In this study, polyethersulfone (PES)/sulfonated polyethersulfone (SPES) composite nanofiltration membranes doped with different contents of monolayer titanium carbide nanosheets (Ti3C2TX) were prepared by the nonsolvent induced phase inversion (NIPS) method. The effects of Ti3C2TXon membrane structure, separation performance and antibacterial activity were investigated systematically. The results demonstrated that the viscosity of the casting solution increased significantly with the increasing content of Ti3C2TX. In addition, the pore size of the membrane surface first decreased and then increased; porosity and hydrophilicity were optimized synchronously; and the density of negative charges on the surface increased. The M2 membrane showed a rejection rate of more than 90% for Metanil yellow (MY) and methylene blue (MEB). The order of salt ion rejection rates was magnesium sulfate (MgSO4) > sodium sulfate (Na2SO4) > sodium chloride (NaCl), and water flux reached the peak (18.5 L/m2·h·bar). The antibacterial activity of the M2 membrane was significantly enhanced, and its antibacterial rate againstBacillus subtilisincreased from 15% (M0) to 58%. This phenomenon was attributed to the synergistic mechanism of the Ti3C2TXphysical capture effect, reactive oxygen species (ROS) generation and sharp edge damage to bacterial cell membranes. This study provides theoretical support and a technical path for the development of MXene composite membranes with high separation efficiency and excellent antibacterial properties.
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