COMPOSITES SCIENCE AND TECHNOLOGY
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2024
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IF 8.3
Yang Zhou,Jiahao Sun,Zhaoyang Li,Bing Zhou,Chuntai Liu,Yuezhan Feng
The integral structure design is equally crucial to the regulation of electromagnetic components in microwave absorbing materials. In this work, magnetic MXene/polyvinylidene fluoride composites with integral nacre-like structure were prepared by successive hot-pressing process to realize the layered arrangement of Ni anchored MXene (Ni@MXene). The order degree of Ni@MXene from random to orientation can be adjusted by gradually changing compression ratio. Interestingly, increasing the orientation degree of Ni@MXene effectively improves the dielectric constant, minimal reflection loss ( RL min ) and effective absorption bandwidth (EAB) of the layered composites. This is attributed to the improved loss ability by increasing the contact areas between Ni@MXene and vertically incident electromagnetic waves , inducing multiple scattering/reflection effect, and the formation of localized conductive pathways. As a result, the layered composite with optimal layered structure delivers the best electromagnetic microwave absorption performance with a RL min of −69.8 dB and an EAB of 4.77 GHz. Besides, increasing the orientation degree can also optimize the mechanical properties of the layered composites, with the maximum tensile strength and toughness of 32.6 MPa and 115.0 MJ m −3 , respectively. Therefore, this work proves the adjustability of absorption performance by changing the distribution of absorbents, and integrates the structure and function for microwave absorption materials .
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Bai-Xue Li,Zhuo Luo,Hao Sun,Qiuyan Quan,Shuai Zhou,Wei-Guang Yang,Zhong-Zhen Yu,Dongzhi Yang
Most low infrared emissivity coatings for anti-infrared reconnaissance are merely suitable for targets warmer than their surroundings, and their flexibility and wearability are unsatisfactory for dynamic stealth applications. Herein, a spectral-selective and adjustable patterned polydimethylsiloxane/MXene/nanoporous polytetrafluoroethylene metafabric with an asymmetric structure is designed, which achieves spectral selectivity of reflection/emission in mid-infrared wavebands and synchronous reflection/absorption of solar light, integrating “shielded infrared stealth” and “compensatory thermal camouflage” in temperature-change scenarios. By synergizing the low infrared emissivity of MXene and the effective heat-transfer suppression of the patterned polydimethylsiloxane, the metafabric obtains an infrared emissivity of as low as ≈28% and minimizes the radiative temperature difference between a target of 36 °C and its low-temperature surroundings even to 2.5 °C. Conversely, the metafabric adaptively unitizes its surface infrared signature with its high-temperature background via the thermal energy compensation supplied by the solar-thermal/electrothermal conversion of MXene and the powerful radiation emission of the outer polydimethylsiloxane. Besides, the metafabric creates a comfortable skin-interface microclimate by the high solar-light reflection of the nanoporous polytetrafluoroethylene and exhibits satisfactory electromagnetic interference shielding performances, mechanical flexibility, self-cleaning, and antioxidation. This work provides a new strategy for designing multifunctional thermal camouflage materials for counter-reconnaissance in changeable surroundings.
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Nanoscale
·
2024
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IF 5.8
Bingjie Wu,Zhenghui Xie,Qiwu Shi,Junlong Yang,Chul B. Park,Pengjian Gong,Guangxian Li
The complex hybrid nanostructure combining a two-dimensional (2D) conductive material and a hierarchical nanoscale skeleton plays an important role to enhance its piezoresistive sensitivity. To construct such a novel hybrid nanostructure, a piezoresistive sensor was designed with the following strategy to take the full advantages of 2D MXene and nanoscale fibrils: ethylene oxide propylene oxide random copolymer (EOPO) was grafted to ethylene-vinyl alcohol (EVOH) molecular chains and was foamed by an environmentally-friendly supercritical CO2 (scCO2) foaming technology to fabricate abundant nanoscale EVOH fibrils surrounding micropores; MXene featured as a 2D structure of nanoscale size that strongly interacted with this hierarchical nanoscale skeleton, and MXene not only convolved on nanoscale fibrils to generate bumps but also MXene covered the end of broken fibrils to build spots, and furthermore, MXene adhered on the soft EOPO embedded EVOH fibrils to form wrinkles, in which these bumps, spots and wrinkles assembled by highly conductive 2D MXene offered sufficient contacts when the hierarchical nanoscale skeleton was compressed (these contacts would then destruct when the skeleton recovered). Such an elaborated hybrid nanostructural design exploits the full potential of 2D MXene and hence achieves an ultra-high sensitivity of 6895.0 kPa−1 for this fabricated MXene piezoresistive sensor.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Na Li,Xinliang Wang,Ying Liu,Yunfeng Li,Jisheng Li,Zhihui Qin,Tifeng Jiao
Epidermal sensors capable of monitoring various physical signals are vital in wearable healthcare applications. MXene-based conductive hydrogels have become promising candidates as skin-attachable sensors for these purposes. However, due to the easy oxidation and weak combination of MXene nanosheets with network matrix, it remains challenging to construct a mechanically tough, highly conductive and skin-conformal hydrogel for reliable signal recording (especially weak electrophysiological signals). Herein, a new conductive MXene-based hydrogel is fabricated through introducing silk fibroin (SF)-modified MXene (MXene-SF) into polyacrylamide (PAM) network. It is demonstrated that the encapsulation of SF on MXene surfaces greatly improves its stability, and meanwhile induces the formation of multiple noncovalent interactions between MXene-SF and PAM chains. The resulting hydrogel exhibits high stretchability (1560 %), remarkable toughness (165 kJ/m 3 ), high conductivity (0.25 S/m) and self-adhesion. This hydrogel is high-sensitive in a large strain range for detecting various human motions. Especially, the high conformal adhesion and low interface impedance make the hydrogel bioelectrodes precisely monitor weak electrophysiological signals (e.g. electromyogram and electrooculogram), successfully achieving sign language translation and eye tracking. Additionally, the hydrogel has great thermosensitive capacities for body temperature monitoring. This study provides a general strategy for designing MXene-based hydrogels with tailored functionalities as flexible electronics.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Qingsong Zhu,Xinyu Lei,Xiaoqin Zha,Eman Ramadan Elsharkawy,Chenye Ren,Huiyuan Chang,Salah M. El-Bahy,Juanna Ren,Renjie Wang,Zeinhom M. El-Bahy,Zhanhu Guo
Ti 3 C 2 MXene (TM) has great application potential in the field of wave absorption and corrosion resistance due to its unique performance, such as high specific surface area, high electrical conductivity, excellent mechanical and good chemical stability. However, it is difficult to obtain uniformly dispersed TM in the resin matrix due to rapid agglomeration behavior. It is difficult to obtain uniformly dispersed Ti 3 C 2 MXene (TM) in the resin matrix due to rapid agglomeration behavior. Herein, a novel method is presented to improve the corrosion protection and dispersion of TM by polymerizing polyaniline (PANI) nanoparticles between layers. The waterborne epoxy (WEP) coating with PANI-TM had high mechanical properties including impact resistance, adhesion, and flexibility and wear resistance. The PANI-TM-WEP composites can effectively absorb more than 90 % of the electromagnetic waves and demonstrate a decreased glass transition temperature of WEP from 128.0 to 107.6 ℃. Moreover, the |Z| 0.01Hz value of the PANI-TM 0.5 % was 1.2369 × 10 6 Ω·cm 2 , which was one order of magnitude larger than WEP coating. The high-performance anticorrosion of PANI intercalated TM coating is attributed to the synergistic effect of impermeable TM nanosheets and passivation effect of PANI. Therefore, PANI-TM is a potential choice for applications in the fields of anticorrosion and microwave absorption.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Qiyue Jia,Hongyu Gao,Wenling Du,Jiaxin Bai,Mei Li,Jiansheng Liu,Zhanli Chai
Expediting the separation and transfer of photogenerated carriers is crucial for plasmonic materials to improve the performance of photocatalysts. However, it remains a significant challenge to strengthen the local surface plasma resonance (LSPR) through the modulation of surface functional groups. Herein, Ti 3 C 2 T x MXene is combined with two typical semiconductor materials to form Ti 3 C 2 T x /CdS (TCS) with dominated surface O x groups and Ti 3 C 2 T x /C 3 N 4 (TCN) with surface-terminated F x species. The obtained TCS composite shows a higher photocatalytic performance (96.7 %) than TCN (86.7 %) and the corresponding bare catalysts in the degradation of tetracycline within 60 min under visible-light irradiation. Moreover, the degradation rate of Ti 3 C 2 T x /CdS composite decreases by only 2.3 % after 4 cycles photocatalytic process, which is more stable than Ti 3 C 2 T x /C 3 N 4 (3.3 %) and CdS (39.3 %). The improved photocatalytic activity and stability mainly result from the enhanced LSPR effect of Ti 3 C 2 T x MXene. In particular, the better performance of TCS compared to TCN indicates that the LSPR effect is highly related to the surface-terminated [O]/[F] ratio. These results directly provide a strategy to enhance the electric field dynamics of MXene materials for improving photocatalytic performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Peng Zu,Haoning Li,Guangming Yan,Gang Zhang
In this study, Ti 3 C 2 T x layers with an average lateral size of approximately 8.3 μm were prepared. The LLM composite membranes synthesized from these layers not only possessed long and narrow mass transfer channels but also further prevented the generation of internal non-selective defects. Additionally, a strategy of compositing these Ti 3 C 2 T x layers and Al(OH) 3 was adopted. The strategy contributed to expanding the interlayer distances of the composite membranes and adjusting the in-plane stacking order, thereby facilitating the construction of mass transfer channels characterized by high permeance within the membranes. This resulted in the preparation of LLMA membranes. Among these LLMA membranes, the LLMA-1:7 composite membranes displayed outstanding performance in the sieving process. Their permeances were more than 10 times higher than those of the LLM membranes (with a thickness of 1 μm). Also, the rejection ratio for CV dye could even exceed 99 %, and the operational stability was also significantly improved. These advantages enabled them to avoid some of the shortcomings commonly found in two-dimensional (2D) separation membranes to a certain extent. In summary, the LLMA-1:7 composite membranes designed in this study demonstrated superior overall performance, compared to the majority of the previously reported 2D membranes. This research is expected to establish a solid foundation for the application of 2D MXene membranes in the field of water treatment.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yuhan Cui,Lijie Zhao,Danfeng He,Jing Sun,Jinyue Yang,Wanxia Tang,Haixia Yu,Chunhua Lou,Wendi Wang,Xinyou Zhang,Huaping Zhao
At present, it is very necessary to select and prepare suitable positive and negative electrode materials to fabricate high-performance asymmetric supercapacitors. Metal–organic frameworks (MOFs) have garnered significant attention in the energy storage field due to their high conductivity. As a branch, the zirconium organic framework (UIO-66) is a promising porous material due to its large specific surface area and abundant Zr centers. Graphene oxide (GO) and MXene are very suitable as substrate materials for conducting an MOF due to their abundant active sites and adjustable interlayer distance. The GO/MXene@NiZrP prepared through an in situ composite of GO and Mxene with the hydrothermal method and calcining method showed excellent electrochemical performance. Compared with the precursor UIO-66, the specific capacitance of the final product GO/MXene@NiZrP increases more than ten times, mainly because of its special layered porous structure, and GO/MXene@NiZrP has a larger specific surface area, pore volume, and surface defects caused by unstable Zr4+ than those of UIO-66. Using GO/MXene@NiZrP as the positive electrode and biochar (BC) as the negative electrode, an asymmetric supercapacitor, BC//GO/MXene@NiZrP, is assembled. After 10,000 cycles at a current density of 10 A g–1, the capacitance retention remains at 83.3%, showing excellent cycle stability.
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高影响因子
Journal of Energy Storage
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2025
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IF 9.8
Shuting Deng,Chenhui Wang,Zeyang Meng,Huo Yang,Wu Long,Yuxin Deng,Bo Hu,Daxiong He,Zhenggang Wang,Xichao Liang
Heterojunction electrode materials derived from MOFs have been shown to effectively improve capacity and rate performance. In this paper, ZnS/Co 9 S 8 (ZCS) heterojunction is successfully embedded in the three-dimensional spatial structure composed of cellulose fiber and MXene, forming a unique composite system by solvothermal method and electrostatic self-loading technology. ZCS particles are well dispersed to the fiber substrate and MXene, exhibited a large specific surface area of 54.80 m 2 g −1 and high level of structural defects, which providing abundant active sites for Li + . The Li ion battery prepared by ZnCoSCF@MXene (ZCSCF@MXene) exhibited high specific capacity of 1549.1 mAh g −1 at 1 A g −1 and excellent magnification performance of 632.3 mAh g −1 at 6.4 A g −1 . The outstanding performance of the ZCSCF@MXene electrode is due to multiple factors, such as the intrinsic electric field created by the ZCS heterostructure, the nitrogen-doped cellulose fiber matrix expanding the contact area between the electrode material and the electrolyte, and the MXene provides a swift route for electron transport, which not only boosts electron dynamics but also successfully prevents the aggregation of ZCS. This paper provides a reference for the composite of heterostructures with cellulose fiber, and provide a new idea for the design of negative electrode materials with high performance metal sulfide heterostructures.
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高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Jiamin Xiao,Wei Wan,Jiaxin He,Junrong Luo,Yushuang Wang,Jie Gu,Tingna Xiao,Ruqing Wan,Ye Chen,Yuejun Ouyang
The rapid advancement of flexible electronics is driving an urgent demand for polymer-based composites that synergistically possess high dielectric performance and superior mechanical properties. This study presents Ti 3 C 2 T x MXene/millable polyurethane (MPU) composite films fabricated via a combined mixing and hot-pressing approach, with a systematic investigation into the effects of MXene content on their properties. The dielectric constant increased linearly with filler content, attaining a value of 11.71 at 1 kHz for the composite with 12 wt% filler. An optimal balance was achieved at 8 wt% loading, yielding a dielectric constant of 11.13 (a 17.3 % enhancement over the neat MPU matrix value of 9.49) coupled with a low dielectric loss of 0.037. The breakdown strength peaked at 69.5 kV/mm for the 6 wt% composite (a 21.5 % improvement) and remained high at 60.2 kV/mm for the 8 wt% composite (a 5.2 % increase). Mechanical properties were significantly enhanced, with the elongation at break reaching a maximum of 682.7 % (94.8 % increase) and 614.1 % (75.3 % increase) at 10 wt% and 8 wt% loadings, respectively. Thermal stability was also enhanced, as evidenced by a 14.4 °C increase in the temperature for 5 % weight loss (to 276.1 °C) for the 10 wt% composite. Microstructural analysis revealed that the uniform dispersion of MXene enhanced interfacial polarization, the hot-pressing-induced orientation of lamellar planes elongated the electrical tree path, and a hydrogen-bonding network formed between the surface functional groups (–O, –OH) of MXene and MPU synergistically improved interfacial stress transfer and thermal stability. This work demonstrates the synergistic optimization of electrical, mechanical, and thermal properties via gradient filler content control, offering a novel strategy for designing high-performance flexible electronic materials.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Yanpei Xu,Silong Li,Shuxian Gao,Fudong Jia,Liang Guo,Jiangrong Hou,Shaowei Ma,Heya Zheng,Chuxiao Sun,Qi Wang
Prostate-specific antigen (PSA) detection is vital for early prostate cancer diagnosis, yet conventional methods suffer from sensitivity and label-dependent limitations. This study presents a surface plasmon resonance (SPR) biosensor enhanced by Ni(OH) 2 /Ti 3 C 2 T x MXene nanocomposites (NTC) for sensitive detection of total PSA (tPSA) in serum. The NTC architecture synergizes carboxyl-functionalized MXene, amplifying localized electric fields and antibody-binding sites, with Ni(OH) 2 nanoflowers that prevent MXene stacking and enhance refractive index (RI) sensitivity. Optimized via finite element modeling (50-nm Au film, 72.4 ° incident angle), the Au-NTC architecture achieved a 39.34% improvement in RI sensitivity (3064.86 nm/RIU) compared to pristine Au. Through the dual signal amplification mechanism of synergistic enhancement by nanomaterials and sandwich method with gold nanoparticles, enabled detection of tPSA in 20% serum across a wide dynamic range (0.2–160 ng/mL), fully covering the clinical risk threshold (4–10 ng/mL). The platform demonstrated an ultralow limit of detection (LOD) of 0.0361 ng/mL (0.5157 pM) and high specificity against interferons. Kinetic analysis revealed strong antigen-antibody affinity (equilibrium dissociation constant K D = 4 . 26 × 1 0 − 10 M), while batch-producible sensor chips and integrated microfluidics underscored practical applicability. This work advances label-free SPR biosensing for precision prostate cancer diagnostics, offering significant potential in point-of-care testing and early intervention strategies.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yingjie Niu,Ziqi Wang,Zhenxiang Xiong,Yuanyuan Tan,Zhijian Meng,Dejin Yan,Hui Cheng,Chenglin Yi,Kaifu Zhang
Temperature sensors play a vital role in fields such as food safety, medical diagnostics, and aerospace. However, the development of conformal temperature sensors with high sensitivity, low cost, broad detection range, and reliable performance under extreme conditions remains a significant challenge due to limitations in materials and fabrication technologies. In this study, we synthesized titanium carbide/silver (MXene/Ag) nanocomposites through electrostatic adsorption and in-situ self-reduction, and formulated a hybrid ink suitable for aerosol jet printing (AJP). The MXene/Ag-Ag-0.28 % ink, prepared with the optimal MXene/Ag and Ag mass ratio, demonstrated outstanding printability with a resolution of up to 10 μm, along with excellent electrical conductivity and mechanical durability. The printed traces achieved a conductivity as high as 2.32 × 10 7 S/m, representing a 56 % improvement over traces printed with Ag ink. Furthermore, the resistance of the printed traces changed by only 2.8 % after 1000 bending cycles, which is 3.22 times more stable than Ag traces. In addition, the printed sensors exhibited a wide temperature detection range from −50 °C to 270 °C, with a response delay as short as 90 ms and a temperature coefficient of resistance (TCR) as high as 3.03 × 10 −3 /°C at 30 °C, which is 24 % higher than that of pure Ag ink. The sensor also demonstrated reliable responsiveness under extreme conditions such as open flame and exposure to liquid nitrogen. Moreover, high-quality conformal temperature sensors were successfully fabricated on a variety of complex curved surfaces, highlighting the advanced manufacturing capabilities of AJP. Notably, conformal sensors were also integrated onto the surface of a turning tool for real-time temperature monitoring during the machining of carbon fiber reinforced polymer (CFRP). These results offer valuable insights into the potential of AJP technology for fabricating high-performance, conformal electronic sensors.
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危险品化学品经营许可证（带存储）