PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Mustehsin Ali,Hongwei Shi,Faheem Jan,Sharjeel Ahmed,Yingwei Song,En-Hou Han
Ti 3 C 2 T x nanosheets, emerging as revolutionary 2D nanomaterials, have sparked interest in advanced applications due to their thin-layered architecture and promise as innovative nanofillers for a variety of applications. To address the oxidation and stacking of Ti 3 C 2 T x nanosheets with the polymer, a novel multifunctional Ti 3 C 2 T x -based nanocomposite is engineered by an etching method. The Ti 3 C 2 T x surface is functionalized with 3-aminopropyltriethoxysilane (APTES), and attapulgite (ATP) is implanted on the NH 2 -Ti 3 C 2 T x interface to lower the cohesive energy between nanosheets. The novel self-healing epoxy films were achieved by encapsulating self-healing components ((8-hydroxyquinoline (8-HQ) + 2-mercaptobenzothiazole (MBT)) in the ATP-based NH 2 -Ti 3 C 2 T x nanocomposite (AMQM). Inhibited AA2024-T3 surface revealed hydrophobic nature, whereas the pH sensitive coatings exhibited strong adherence to the substrate and improved compatibility and mechanical strength. The impedance of artificially scratched epoxy film rose from 0.073 M Ω cm 2 to 0.198 M Ω cm 2 (after 12 h) and from 0.027 M Ω cm 2 to 2.189 M Ω cm 2 (after 96 h) in comparison with the control samples. Simulations depict the presence of hydrogen bonds between the inhibitors and the 2024-T3 alloy, as well as twice the adsorption energy compared to the individual inhibitors. Therefore, a novel pH-sensitive self-healing coating offers a synergistic approach for promising corrosion suppression.
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Materials
·
2024
·Vol. 17
·期 18
·4499
·
IF 3.1
Siyu Wang,Dawei Xia,Xinyu Xu,Haoyang Song,Yongquan Qing
Superhydrophobic strain sensors are highly promising for human motion and health monitoring in wet environments. However, the introduction of superhydrophobicity inevitably alters the mechanical and conductive properties of these sensors, affecting sensing performance and limiting behavior monitoring. Here, we developed an alkylated MXene–carbon nanotube/microfiber composite material (AMNCM) that is simultaneously flexible, superhydrophobic, and senses properties. Comprising a commercially available fabric substrate that is coated with a functional network of alkylated MXene/multi-walled carbon nanotubes and epoxy–silicone oligomers, the AMNCM offers high mechanical and chemical robustness, maintaining high conductivity and strain sensing properties. Furthermore, the AMNCM strain sensor achieves a gauge factor of up to 51.68 within a strain range of 80–100%, and exhibits rapid response times (125 ms) and long-term stability under cyclic stretching, while also displaying superior direct/indirect anti-fouling capabilities. These properties position the AMNCM as a promising candidate for next-generation wearable devices designed for advanced environmental interactions and human activity monitoring.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Mengying Du,Guoqing Zu,Chuanyu Sun,Fan Ye,Xijia Yang
With the trend towards slimmer and smaller wearable smart electronic devices, there is a growing need for lightweight, flexible, and eco-friendly power sources. Herein, we report a wearable, self-charging energy storage device based on triboelectric nanogenerator (TENG) for energy-harvesting and zinc-ion hybrid capacitor for energy-storage. The all-fiber-structured TENG is constructed by using ethyl cellulose/polyvinylpyrrolidone (EC/PVP) as the positive friction layer and MXene-doped polyvinylidene fluoride (PVDF) with strong electronegativity as the negative friction layer via electrostatic spinning. Particularly, the TENG possesses achieving a peak power density of 830 mW m −2 at a load resistance of 10 8 Ω. In addition, MnO 2 /carbon cloth (CC) cathode, activated carbon anode and ZnCl 2 @MnSO 4 /PVA electrolyte were assembled for a zinc-ion hybrid capacitor (MA-SC), which exhibits excellent electrochemical performance, with a specific capacitance of 493.79 mF cm −2 at 2 mA cm −2 . The MA-SC demonstrates high energy density of 341.8 μWh cm −2 at power density of 5.56 mW cm −2 , which is very suitable as an energy storage device. The MA-SC and TENG can be assembled to the power textile that integrates into garments, enabling the harvest and storage of mechanical energy generated by the human body. Therefore, this integrated self-charging power textile holds great promising applications in wearable electronics.
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Polymers
·
2024
·Vol. 16
·期 6
·760
·
IF 4.7
Xiaoshuai Han,Hongyu Feng,Wei Tian,Kai Zhang,Lei Zhang,Jiangbo Wang,Shaohua Jiang
A thin, lightweight and flexible electromagnetic interference (EMI) shielding paper composite is an urgent need for modern military confrontations. Herein, a sandwich-structured EMI shielding paper composite with an easy pavement consisting of a filter paper layer, middle AgNWs/MXene layer, and polyvinyl butyral (PVB) layer was constructed by vacuum-assisted filtration, spraying and air-drying. The middle AgNWs/MXene compound endowed the filter paper with excellent electrical conductivity (166 S cm−1) and the fabricated filter paper–AgNWs/MXene–PVB composite exhibits superior EMI shielding (30 dB) with a 141 μm thickness. Remarkably, the specific EMI shielding effectiveness (SSE/t) of the filter paper–AgNWs/MXene–PVB composite reached 13,000 dB cm2g−1within the X-band frequency range. This value represents one of the highest reported for cellulose-based EMI shielding materials. Therefore, our sandwich-structured filter paper composite with superior EMI shielding performance can be used in the medical and military fields.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Anyun Li,Peiying Xie,Ying Yuan,Xiaolan Liang,Jiaming Chen,Yunhua Chen,Chaoyang Wang,Tao Wang,Li Zhou,Hongxia Liu
Developing composite carbon foams with multiple loss mechanisms and achieving stable and efficient electromagnetic wave absorption performance in harsh environments remain challenges. In this study, aqueous dispersions containing Ni2+ cellulose nanofiber (CNF) and Ti3C2Tx MXene were used to stabilize a styrene–butadiene–styrene (SBS) cyclohexane solution in the oil phase to form a Pickering emulsion gel. This gel was combined with freeze-drying and thermal annealing processes to synthesize nickel nanowires (Ni NWs) in situ within a three-dimensional pore structure at elevated temperatures, resulting in the production of C–CNF/MXene/Ni NW composite carbon foams. In this process, carbonized CNF and SBS function as three-dimensional scaffolds, while two-dimensional MXene sheets and in situ synthesized Ni NWs are uniformly integrated to establish a conductive network with heterogeneous interfaces. The resultant composite carbon foam demonstrates stable microwave absorption properties, with the C-C1M1N3 carbon foam achieving a minimum reflection loss (RLmin) of −45.2 dB at 13.6 GHz when the thickness is only 3.0 mm and a wide effective absorption bandwidth (EAB) of 7.6 GHz at the same thickness. Additionally, the carbon foam exhibited excellent hydrophobicity and lipophilicity, indicating potential for oil–water separation applications.
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Sustainable Energy & Fuels
·
2024
·
IF 5
Fuqiang Zhang,Zhiqiang Qi,Xiangsheng Han,Hongzhen Cai,Keyan Yang
Interfacial solar steam generation (ISSG) is an effective method to produce clean water through evaporating seawater actuated by solar energy. Nevertheless, developing a solar evaporator that is simultaneously simple in process and maintains good stability and high efficiency is still difficult but in great demand. Herein, an aerogel solar evaporator was prepared by cross-linking chitosan (CS) and two-dimensional transition metal carbide/nitride (MXene) nanosheets with excellent properties via a simple freeze-drying strategy. The unique three-dimensional network structure and good biocompatibility could facilitate quick transport of water from the bottom up to the evaporation surface by capillary force. MXene nanosheets combined a broad spectral response with strong solar absorption capacity, enabling the CS/MXene aerogel solar evaporator to exhibit strong light absorption, light-to-heat conversion, and water transport capabilities. The results showed that the water evaporation rate under one sun was as high as 1.80 kg m−2 h−1, with an energy conversion efficiency of 75.2%. Notably, the stability of the solar evaporator ensured stable solar water evaporation over a long period compared with most CS-based solar evaporators. Meanwhile, clean water could be continuously produced from acidic, alkaline and organic dye solutions, and saline brines. These tactics pave a new way for developing solar absorbers for solar-driven desalination.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 13
·e55161
·
IF 2.7
Haofei Sima,Bo Liu,Chunzu Cheng,Chunling Zhang
The construction of conductive network and the design of material structure are the key points of polymer-based shielding materials. Herein, we reported a MXene/PDMS composite foam material with adjustable cell structure and high efficiency electromagnetic interference (EMI) shielding. Few-layered MXene is used as a conductive filler to construct three-dimensional conductive networks by in situ chemical etching. Meanwhile, a series of polystyrene microspheres with different sizes were prepared by applying suspension polymerization method as templates to introduce different cell sizes and densities for PDMS-based materials. The density and EMI shielding performance of composites can be improved by adjusting the cell structure. Compared with the unfoamed MXene/PDMS composites, the composite foam in this work not only reduces the material density greatly but also improves the microwave absorption performance with smaller cell size. This method provides a simple and effective guide for changing material density and absorbing mechanism by introducing cell structure into polymer-based materials in the future.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yuting Yuan,Xu Zhang,Li Liu,Haofan Wang,Zhiqi Bao,Yahua Liu,Chenxiao Jiang,Bin Wu
Bipolar membrane electrodialysis (BMED) efficiently transforms salts into acids and bases, with bipolar membranes (BPMs) playing a pivotal role. This study pioneers high-performance BPMs via a layer-by-layer casting/spraying technique, incorporating sulfonated polysulfone cation-exchange layers, polydopamine-modified MXene (PDA-Ti 3 C 2 T X ) interfacial layers, and quaternized polyphenylene oxide anion-exchange layers. PDA-Ti 3 C 2 T X exhibits remarkable catalytic activity, promoting water dissociation. The BPMs exhibit exceptional interfacial compatibility, alkali resistance, and long-term durability. At 80 mA · cm −2 , the BPMs manifest reduced transmembrane voltages (1.54 ∼ 2.80 V) compared to control samples (Blank BPM: 7.70 V; 0.75 %-Ti 3 C 2 T X -BPM: 5.51 V). Post-BMED salt conversion, the 1.00 %-PDA-Ti 3 C 2 T X -BPM displays the lowest final voltage drop (9.9 V), akin to the commercial SSBP-1 (9.8 V). The 0.75 %-PDA-Ti 3 C 2 T X -BPM attains the highest OH – concentration (0.094 mol·L -1 ) and current efficiency (98.79 %), surpassing SSBP-1 (0.090 mol·L -1 , 94.47 %). The BPMs demonstrate superior energy consumption (2.00 ∼ 2.49 kWh kg −1 ) compared to SSBP-1 (2.94 kWh kg −1 ). This investigation delineates efficient and stable BPMs for BMED applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hui Li,Yuanli Yang,Min Mu,Chenqian Feng,Di Chuan,Yangmei Ren,Xiaoxiao Wang,Rangrang Fan,Jiazhen Yan,Gang Guo
Wound infection is a predominant etiological factor contributing to delayed wound healing in open wounds. Hence, it holds paramount clinical significance to devise wound dressings endowed with superior antibacterial properties . In this study, a Schiff base-crosslinked aerogel comprising sodium alginate oxide (OSA), carboxymethyl chitosan (CMCS), and Nb 2 C@Ag/PDA (NAP) was developed. The resultant OSA/CMCS-Nb 2 C@Ag/PDA (OC/NAP) composite aerogel exhibited commendable attributes including exceptional swelling characteristics, porosity, biocompatibility, and sustained antimicrobial efficacy. In vitro antimicrobial assays unequivocally demonstrated that the OC/NAP composite aerogel maintained nearly 100 % inhibition of Staphylococcus aureus and Escherichia coli under an 808 nm laser even after 25 h. Crucially, the outcomes of in vivo infected wound healing experiments demonstrated that the wound healing rate of the OC/NAP composite aerogel group reached approximately 100 % within a span of 14 days, which was significantly greater than that of the blank control group. In vitro and in vivo hemostatic experiments also revealed that the composite aerogel had excellent hemostatic properties. The results of this study demonstrate the remarkable potential of OC/NAP aerogel as a multifunctional clinical wound dressing, especially for infected wounds.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Jun Peng,Fangqing Ge,Weiyi Han,Tao Wu,Jinglei Tang,Yuning Li,Chaoxia Wang
Wearable thermoelectric devices hold significant promise in the realm of self-powered wearable electronics, offering applications in energy harvesting, movement tracking, and health monitoring. Nevertheless, developing thermoelectric devices with exceptional flexibility, enduring thermoelectric stability, multifunctional sensing, and comfortable wear remains a challenge. In this work, a stretchable MXene-based thermoelectric fabric is designed to accurately discern temperature and strain stimuli. This is achieved by constructing an adhesive polydopamine (PDA) layer on the nylon fabric surface, which facilitates the subsequent MXene attachment through hydrogen bonding. This fusion results in MXene-based thermoelectric fabric that excels in both temperature sensing and strain sensing. The resultant MXene-based thermoelectric fabric exhibits outstanding temperature detection capability and cyclic stability, while also delivering excellent sensitivity, rapid responsiveness (60 ms), and remarkable durability in strain sensing (3200 cycles). Moreover, when affixed to a mask, this MXene-based thermoelectric fabric utilizes the temperature difference between the body and the environment to harness body heat, converting it into electrical energy and accurately discerning the body's respiratory rate. In addition, the MXene-based thermoelectric fabric can monitor the state of the body's joint through its own deformation. Furthermore, it possesses the capability to convert solar energy into heat. These findings indicate that MXene-based thermoelectric fabric holds great promise for applications in power generation, motion tracking, and health monitoring.
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Advanced Science
·
2021
·Vol. 8
·期 18
·2101664
·
IF 16.806
Xianwu Huang,Jiahui Huang,Dong Yang,Peiyi Wu
MXenes as an emerging two-dimensional (2D) material have attracted tremendous interest in electrochemical energy-storage systems such as supercapacitors. Nevertheless, 2D MXene flakes intrinsically tend to lie flat on the substrate when self-assembling as electrodes, leading to the highly tortuous ion pathways orthogonal to the current collector and hindering ion accessibility. Herein, a facile strategy toward multi-scale structural engineering is proposed to fabricate high-performance MXene hydrogel supercapacitor electrodes. By unidirectional freezing of the MXene slurry followed by a designed thawing process in the sulfuric acid electrolyte, the hydrogel electrode is endowed with a three-dimensional (3D) open macrostructure impregnated with sufficient electrolyte and H + -intercalated microstructure, which provide abundant active sites for ion storage. Meanwhile, the ordered channels bring through-electrode ion and electron transportation pathways that facilitate electrolyte infiltration and mass exchange between electrolyte and electrode. Furthermore, this strategy can also be extended to the fabrication of a 3D-printed all-MXene micro-supercapacitor (MSC), delivering an ultrahigh areal capacitance of 2.0 F cm –2 at 1.2 mA cm –2 and retaining 1.2 F cm –2 at 60 mA cm –2 together with record-high energy density (0.1 mWh cm –2 at 0.38 mW cm –2 ).
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Jiang Haojie,Yuan Bin,Guo Hongtao,Pan Fei,Meng Fanmao,Wu Yongpeng,Wang Xiao,Ruan Lingyang,Zheng Shuhuai,Yang Yang,Xiu Zheng,Li Lixin,Wu Changsheng,Gong Yongqing,Yang Menghao,Lu Wei
Integration of functional fillers into liquid metals (LM) induces rheology modification, enabling the free-form shaping of LM at the micrometer scale. However, integrating non-chemically modified low-dimensional materials with LM to form stable and uniform dispersions remain a great challenge. Herein, we propose a solvent-assisted dispersion (SAD) method that utilizes the fragmentation and reintegration of LM in volatile solvents to engulf and disperse fillers. This method successfully integrates MXene uniformly into LM, achieving better internal connectivity than the conventional dry powder mixing (DPM) method. Consequently, the MXene/LM (MLM) coating exhibits high electromagnetic interference (EMI) shielding performance (105 dB at 20 μm, which is 1.6 times that of coatings prepared by DPM). Moreover, the rheological characteristic of MLM render it malleable and facilitates direct printing and adaptation to diverse structures. This study offers a convenient method for assembling LM with low-dimensional materials, paving the way for the development of multifunctional soft devices.
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