POLYMER
·
2026
·
IF 5.1
Xiaojie Jiang,Binzhe Tan,Dongya Guo,Jun Zheng,Yiduan Lou,Yu Lin
Two-dimensional MXene materials have exhibited considerable promise for electromagnetic interference (EMI) shielding due to their excellent electrical conductivity. However, achieving excellent mechanical properties and high EMI shielding effectiveness (SE) simultaneously in such composite materials with the lowest content of MXene remains a continuing challenge. Herein, delignified wood (DW) aerogel with porous structure was obtained by the sodium chlorite method, and the ternary composite film of polyimide (PI)/MXene/DW was fabricated by sequential vacuum impregnation of MXene and polyamide acid solution, followed by hot pressing and thermal imidization. The introduction of PI significantly improves the mechanical properties of the composite film, exhibiting the tensile strength and modulus of 88.97 MPa and 2.93 GPa, respectively. The composite film exhibits the EMI SE of 15.2 dB in the X-band range with the MXene content of only 7 wt% and the thickness of 0.3 mm, corresponding to a high SE/ t of 50.7 dB/mm. Moreover, the composite film shows stable EMI shielding performance even after exposing in a variety of harsh environments and good flame retardancy properties. Therefore, the resulting composite film exhibits excellent EMI shielding and flame retardancy performance, which provides the potential applications in aerospace and related fields.
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·8937-8944
·
IF 9.9
Zhang Ruijie,Sun Yajing,Jiao Fei,Li Lin,Geng Dechao,Hu Wenping
As a new paradigm of material science, two-dimensional (2D) heterostructured composites have attracted extensive interests because of combining the collective advantages and collaborative characteristics of individual building blocks. Molybdenum disulfide (MoS 2 ) has demonstrated great promise as a low-cost substitute to platinum-based catalysts for electrochemical hydrogen production. However, the broad adoption of MoS 2 is hindered by its limited number of active sites and low inherent electrical conductivity. One of the promising methods to further activate MoS 2 is coupling engineering. Here, we demonstrate for the first time the synthesis of 2D MXene-MoS 2 nanocomposites through chemical vapor deposition (CVD) approach, thus leading to precise design in structure type and orientation. The computational results show that nanocomposites have metallic properties. Owing to their unique 2D/2D structure, MXene-MoS 2 nanocomposites exhibit more active catalytic sites, resulting in higher electrochemical performance, as inherited from parent excellent characteristics, and a much lower overpotential of ∼ 69 mV at a current density of 10 mA·cm −2 is achieved. This work paves the way to employ CVD method by coupling engineering to construct 2D nanocomposites for energy storage applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-13
·
IF 2.8
Guo Yitong,Du Jingyang,Hu Meihua,Wei Bin,Su Taichao,Zhou Aiguo
In this paper, the thermoelectric (TE) performance of Bi 2 Te 3 was improved by the incorporation of Mo 2 C MXene, which is a novel two-dimensional material with moderate TE performance. The TE properties of Mo 2 C MXene were characterized from bulk samples bonded with 5 wt% Al sintered by spark plasma sintering (SPS) at 623 K for 6 min. Due to the very weak TE performance of Al, the performance of Mo 2 C MXene/Al composite reflects that of Mo 2 C MXene. It is an N-type conductor with the Seebeck coefficient of − 9.25 µV/K at 600 K. This is the first report to characterize the TE performance of Mo 2 C MXene bulk samples. Thereafter, Bi 2 Te 3 /Mo 2 C MXene composite powders were prepared from Mo 2 C MXene powers and precursors of Bi 2 Te 3 by hydrothermal method at 453 K for 24 h. The bulk samples of Bi 2 Te 3 incorporated with Mo 2 C MXene was obtained by SPS at 523 K for 7 min. The composites are N-type conductors. The electrical conductivity was remarkably increased with the content of Mo 2 C MXene, while the thermal conductivity slightly decreased. The sample with 5 vol% Mo 2 C MXene showed the optimal thermoelectric properties, and its ZT value was 0.26 at 473 K. At 450 K, the ZT value (~ 0.25) of that sample was 78.6% higher than that of Bi 2 Te 3 (~ 0.14). This is the first report on regulating TE performance by the incorporation of Mo 2 C MXene, a 2D material with intrinsic TE performance.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Wenwen Li,Qi Fan,Chunxiao Chai,Yiran Chu,Jingcheng Hao
Wearable piezoresistive sensors have attracted tremendous attention recently, which can be applied for health monitoring and human-computer interaction. MXenes, possessing high metallic conductivity and large specific surface area, are often used as the conductive filler in hydrogels and organohydrogels for piezoresistive sensors. However, the environmental instability of MXene composites caused by the easy oxidation of MXene is a long-standing issue which needs to be solved urgently. Herein, taking advantage of phase transfer achieved by cationic surface active ionic liquid 1-vinyl-3-dodecylimidazolium bromide ([VC 12 Im]Br), we combine Ti 3 C 2 T x with hydrophobic ionic liquid to fabricate Ti 3 C 2 -MXene ionogel successfully, which exhibits high compressibility (2.97 MPa), high conductivity (0.908 mS/cm) and long-term stability (40 days). And the wearable piezoresistive sensor based on Ti 3 C 2 -MXene ionogel shows rapid response time (100 ms), high sensitivity (6.47 kPa −1 ) and wide detection range, thus can be used to monitor the tiny movements of human body parts, recognize vocalizations and handwriting. This preparation method develops a new path to fabricate Ti 3 C 2 -MXene ionogel with long-term stability and high sensitivity for wearable electronic devices.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 10
·6619-6629
·
IF 3.9
Yunsheng Da,Qiqi Qu,Ling Kong,Qiang Liu,Menghan Zhu,Yiming Du,Xingyou Tian,Yanyan Liu,Hua Wang
Next-generation wearable electromagnetic interference (EMI) materials need to be provided with oxidation resistance, lightness, and flexibility. In this study, a high-performance EMI film with synergistic enhancement of Zn2+@Ti3C2Tx MXene/cellulose nanofibers (CNF) was found. The unique Zn@Ti3C2Tx MXene/CNF heterogeneous interface facilitates the loss of interface polarization, making the total electromagnetic shielding effectiveness (EMI SET) and shielding effectiveness per unit thickness (SE/d) of the films reach 60.3 dB and 5025 dB mm−1, respectively, in the X-band at the thickness of 12 μm ± 2 μm, significantly exceeding that of other MXene-based shielding materials. In addition, the coefficient of absorption gradually increases with the increasing CNF content. Moreover, under the synergistic effect of Zn2+, the film shows excellent oxidation resistance (maintaining stable performance after 30 days), greatly exceeding the previous test cycle. Furthermore, the mechanical performance and flexibility of the film are greatly enhanced (tensile strength at 60 MPa, and maintaining stable performance after 100 times bending tests) due to the CNF and hot-pressing process. Therefore, with the enhancement of the EMI performance, high flexibility and oxidation resistance under high temperature and high humidity conditions, the as-prepared films have wide practical significance and broad application prospects in a series of complex applications, such as flexible wearable fields, ocean engineering fields and high-power device packaging fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 6
·958
·
IF 5.3
Xiaofang Liu,Hongchi Xie,Shi Zhuo,Yuanhong Zhou,Mohamed S. Selim,Xiang Chen,Zhifeng Hao
For a long time, the emergence of microbial drug resistance due to the abuse of antibiotics has greatly reduced the therapeutic effect of many existing antibiotics. This makes the development of new antimicrobial materials urgent. Light-assisted antimicrobial therapy is an alternative to antibiotic therapy due to its high antimicrobial efficiency and non-resistance. Here, we develop a nanocomposite material (Ru@MXene) which is based on Ru(bpy)(dcb)2+connected to MXene nanosheets by ester bonding as a photothermal/photodynamic synergistic antibacterial material. The obtained Ru@MXene nanocomposites exhibit a strengthened antimicrobial capacity compared to Ru or MXene alone, which can be attributed to the higher reactive oxygen species (ROS) yield and the thermal effect. Once exposed to a xenon lamp, Ru@MXene promptly achieved almost 100% bactericidal activity againstEscherichia coli(200 μg/mL) andStaphylococcus aureus(100 μg/mL). This is ascribed to its synergistic photothermal therapy (PTT) and photodynamic therapy (PDT) capabilities. Consequently, the innovative Ru@MXene can be a prospective non-drug antimicrobial therapy that avoids antibiotic resistance in practice. Notably, this high-efficiency PTT/PDT synergistic antimicrobial material by bonding Ru complexes to MXene is the first such reported model. However, the toxic effects of Ru@MXene materials need to be studied to evaluate them for further medical applications.Keywords:MXene;Ru complex;PTT/PDT;antimicrobial
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 6
·1330
·
IF 5
Kun Hou,Yafeng Yang,Hu Zhou,Xiangmeng Chen,Shengbo Ge
Water pollution has spurred the development of membrane separation technology as a potential means of solving the issue. In contrast to the irregular and asymmetric holes that are easily made during the fabrication of organic polymer membranes, forming regular transport channels is essential. This necessitates the use of large-size, two-dimensional materials that can enhance membrane separation performance. However, some limitations regarding yield are associated with preparing large-sized MXene polymer-based nanosheets, which restrict their large-scale application. Here, we propose a combination of wet etching and cyclic ultrasonic-centrifugal separation to meet the needs of the large-scale production of MXene polymers nanosheets. It was found that the yield of large-sized Ti3C2TxMXene polymers nanosheets reached 71.37%, which was 2.14 times and 1.77 times higher than that prepared with continuous ultrasonication for 10 min and 60 min, respectively. The size of the Ti3C2TxMXene polymers nanosheets was maintained at the micron level with the help of the cyclic ultrasonic-centrifugal separation technology. In addition, certain advantages of water purification were evident due to the possibility of attaining the pure water flux of 36.5 kg m−2h−1bar−1for the Ti3C2TxMXene membrane prepared with cyclic ultrasonic-centrifugal separation. This simple method provided a convenient way for the scale-up production of Ti3C2TxMXene polymers nanosheets.Keywords:Ti3C2TxMXene;yield;polymers nanosheets;cyclic ultrasonic-centrifugal separation
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 19
·10337-10345
·
IF 11.9
Zhongguo Wang,Xiong-Fei Zhang,Lian Shu,Jianfeng Yao
Hydrogels fabricated from top-down wood nanotechnology have attracted a lot of attention. Herein, two-dimensional and conductive MXenes are utilized as fillers and functional agents to impart a wood hydrogel with multifunctionality. Specifically, a wood substrate was directly converted into a wood hydrogel using an inorganic ZnCl2 solution system. ZnCl2 has a dual role in promoting the exfoliation and dispersion of MXenes, and simultaneously inducing the rearrangement of cellulose fibers. An extensive hydrogen bonding network between cellulose and MXenes can be constructed, and the ionic coordination between Zn2+ ions and hydroxyl groups serves as a secondary cross-linked network for the composite hydrogel. Enabled by the MXenes and Zn2+ ions, the as-prepared wood hydrogel presents well-preserved anisotropy, superior mechanical performance, high conductivity and extreme temperature tolerance. Moreover, the wood hydrogels demonstrate huge potential in the healthcare monitoring applications of human motion detection, temperature sensing and photothermal conversion. This study provides a simple strategy for developing wood hydrogel sensor systems with high conductivity and a wide temperature range response.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuhong Cui,Baoluo He,Shenghua Xue,Zhuo Chen,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Improving the tribological performance of water via designing nanomaterials as lubricant additive has garnered mounting interest. In this work, the poly-(N-isopropylacrylamide) microgel is grafted onto Fe 3 O 4 nanoparticles surface (Fe 3 O 4 @PNA) via free radical polymerization. Then, the Fe 3 O 4 @PNA can self-anchored on the MXene nanosheets via hydrogen bonding interaction to obtain MXene@Fe 3 O 4 @PNA composite. The as-prepared MXene@Fe 3 O 4 @PNA can effectively reduce friction and wear when used as a water-based lubricant additive. Compared with pure water, the average coefficient of friction (COF) and wear volume decrease by 61% and 78.7%, respectively. The lubrication mechanism was analyzed by focused ion beam technique-TEM (FIB-TEM) and X-ray photoelectron spectroscopy (XPS). The outstanding tribological performance of MXene@Fe 3 O 4 @PNA is attributed to the synergistic lubrication effect of MXene and Fe 3 O 4 @PNA. Interlayer shear of MXene and spherical Fe 3 O 4 @PNA can make MXene@Fe 3 O 4 @PNA play a full role of sliding friction and rolling friction mechanism, which can induce tribo-chemical reactions to form a protective film on the contact area of the friction pair. In addition, the hydrophilic groups of the MXene@Fe 3 O 4 @PNA can adsorb a large number of water molecules and form a hydration layer, reducing the agglomeration of nanosheets and acting as a boundary lubrication film. Moreover, the as-prepared MXene@Fe 3 O 4 @PNA exhibit excellent photothermal conversion performance in both underwater environment and dry state. Based on this characteristic, infrared light can be collected efficiently and stored quickly. Then, convert and utilize it. Therefore, the multifunctional MXene@Fe 3 O 4 @PNA has a broad application prospect as a water-based intelligent lubrication additive.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yixin Zeng,Peng Wang,Baoluo He,Shujuan Liu,Qian Ye,Feng Zhou
Marine biological pollution is a worldwide problem that poses a significant challenge in marine engineering. MXene nanosheets and zwitterionic polymers are promising materials for marine anti-biofouling and have attracted much attention. Herein, we self-assembled the polydopamine layer on the surface of MXene nanosheets (MXene-PDA), and then introduced the zwitterionic polymer (PEIS) by Michael addition reaction onto the PDA layer to obtain the zwitterionic polymer-functionalized MXene nanosheets (MXene-PEIS). The as-prepared MXene-PEIS exhibits excellent antifouling performance through the cooperative antifouling effect between the MXene nanosheets and the zwitterionic polymer PEIS (the antibacterial rate improved by 88 % and there was a 98 % decrease in microalgae adhesion density). Moreover, the nanocomposite antifouling coatings (MXene-PEIS/SP) were obtained by blending the as-prepared MXene-PEIS nanosheets with self-polishing coatings. The results show that MXene-PEIS/SP coatings have good antifouling performance due to the synergy between MXene, PEIS, and self-polishing coatings.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hanwen Zhang,Liuxue Shen,Xiaodong Geng,Jianxin Zhang,Yue Jiang,Hongting Ma,Quanli Liu,Kai Yang,Junlin Ma,Nan Zhu
Sodium superionic conductor (NASICON) structured polyanionic materials have recently attracted great attention for robust crystal structures. However, inherent properties of NASICON presents poor electrical conductivity and low energy density. Herein, non-stoichiometric synthesized strategy is used for acquiring N 3.5 MTP, effectively suppressing voltage hysteresis. Besides, as-fabricated N 3.5 MTP grains in-situ grow on MXene-rGO aerogels by sol–gel synthesis approach obtaining N 3.5 MTP@MXene-rGO. MXene-rGO aerogel as an excellent conductive matrix can effectively avoid agglomeration of Na 3.5 MnTi(PO 4 ) 3 particles and alleviate volume change of the lattice during sodium ion intercalation/deintercalation. Moreover, cross-linked network of N 3.5 MTP@MXene-rGO provides fast electron transfer and ion transport rates. The above synergistic effect and contribution of pseudocapacitance make it an excellent discharge capacity of 189 mA h g −1 at 50 mA g −1 for N 3.5 MTP@MXene-rGO, long cycles of 5000 cycles, as well as 98 mA g −1 at −30 °C (50 mA g −1 ). Prospectively, this study provides an effective strategy for improving electrochemical performance of NASICON-type cathode for sodium batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Na Chu,Chunjia Luo,Xushuai Chen,Liuxin Li,Chaobo Liang,Min Chao,Luke Yan
With the development of electronic products to miniaturization and high frequency, high-performance flexible electromagnetic interference (EMI) shielding materials are urgently needed to deal with electromagnetic pollution. Two-dimensional transition metal carbide/polyimide (Ti 3 C 2 T x MXene/PI) films were synthesized by in situ polymerization and a simple scratch method in this paper. The Ti 3 C 2 T x MXene nanosheets give the films good EMI shielding effectiveness (SE) and electrical conductivity . Specifically, the film with a thickness of 0.11 mm (Ti 3 C 2 T x content of 30 wt%) exhibits an EMI SE of 34.73 dB and a specific EMI SE (SE/thickness) of 315.73 dB/mm in the frequency range of 8.2–12.4 GHz (X-band). In addition, the films have a tensile strength of 67.58 MPa, and a high decomposition temperature of 510 ℃ in N 2 atmosphere. Therefore, we believe that the prepared Ti 3 C 2 T x /PI films with good comprehensive performance have enormous potential in the field of lightweight and flexible EMI shielding materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）