Materials Today Physics
·
2025
·
IF 9.7
Xu Zhou,Xiao-Ai Ye,Jia-Qi Zhu,Gui-Gen Wang
Conductive hydrogels with water-enriched pores have shown great potential in electromagnetic wave protection and flexible wearable electronics. However, hydrogel with high water content often results in some challenges such as water loss and low-temperature freezing. In this study, porous gelatin/ChCl/MXene Ti 3 C 2 T x (GCM) hydrogels were prepared via a facile one-pot method. The introduction of ChCl forms abundant hydrogen bonds in GCM hydrogels, which endows the hydrogels long-term anti-drying (30 days) and anti-freezing abilities (−30 °C). Due to the synergistic effects of the porous structure, highly conductive MXene and water molecules, the electromagnetic interference (EMI) shielding effectiveness (SE) reach up to 108 dB in the X-band. Significantly, the effect of water molecules on EMI SE is quantified by adjusting the water content in hydrogel. Moreover, the gelatin-based hydrogel exhibits super-elasticity (0.25 MPa at 80 % strain) and demonstrates no significant decrease in EMI SE after 500 compression cycles. Finally, the excellent pressure-sensing properties of GCM hydrogel enable sensitive and reliable detection in human motion and smart coding. Therefore, the developed GCM hydrogel demonstrates promising application prospects in the fields of EMI shielding and sensing for wearable electronic devices.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ze-Long Bao,Wen-Hao Geng,Song-Yi Zhang,Peng-Fei Qian,Li-Chao Jing,Xuan-Chen Liu,Tong-Yu Li,Yu-Long Guo,Ru-Yu Chang,Hong-Zhang Geng
Ubiquitous electromagnetic waves have a negative effect on precision instruments and damage human health. Therefore, multifunctional and versatile flexible transparent conductive films, which can solve the challenge of microelectronic device encapsulated and protected in harsh conditions (e.g., extreme temperature) in specific scenarios, are demanded to process electromagnetic shielding and electric heating properties. Herein, AgNWs/MXene@Ni/PET films were fabricated by MXene template-guided electrochemical deposition of nickel nanosphere as flexible transparent conductive films. The films exhibit excellent optoelectrical properties (9.8 Ω/sq @ transparency 80.3%), splendid EMI shielding performances (35.1 dB), outstanding electric heating performance (85°C at 4 V), and rapid heating capability (reaching the saturation temperature with 40 s), which are potential to be widely applied under the complex surrounding as electromagnetic shielding and electric heating. Noticeably, nickel nanosphere are regarded as resistor-capacitor circuit model on the surface of MXene, forming the structure of the capacitor. Furthermore, magnetic nickel nanospheres have synergistic effect with dielectric MXene and AgNWs, defined Dielectric-Magnetic-Dielectric synergistic absorption. In addition, Ni nanosphere generate dielectric dipole interactions with MXene, to enhance the capability of absorbing EMW. Finally, this work has the potential to be conducive to practical and commercial applications as flexible transparent electromagnetic interference and electric heating devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dongao Liu,Lei Li,Quanxin Gong,Gui Du,Yuhua Xue,Guisheng Li,Shengjuan Li
Developing high-performance and cost-effective microwave-absorbing materials for large-scale production is crucial in addressing the current electromagnetic pollution problem. This has become a focus of scientific research. This study proposes a cost-effective freeze-thaw method to enable large-scale production of MXene-based flexible films. This method streamlines the preparation process and produces ultrathin flexible MXene/CNF composite films with a multidimensional layered structure. The multidimensional layered structure provides additional scattering and reflecting paths for electromagnetic waves, increasing the interaction time between electromagnetic waves and the material. Additionally, the redistributed interfacial charge enhances the dielectric loss and electromagnetic shielding performance for the shielding material, thereby improving microwave absorption efficiency. Owing to these advantages, the MXene/CNF composite films prepared using the freeze-thaw method exhibit excellent electromagnetic shielding and mechanical properties. The conductivity of the composite film can reach 165.9 S cm −1 with a shielding effectiveness of 54.7 dB, and a high efficiency of 99.74 %. According to the simulations using a finite element method (FEM), the arrangement and rotation angles of all CNF layers significantly affect the electromagnetic shielding effectiveness of the MXenen/CNF composite films.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Yuntong Wen,Hao Bian,Yongpeng Ran,Yonghao Xie,Minmin You,Huimin Wen,Liyun Shi,Jingquan Liu,Zude Lin
The 2D Ti 3 C 2 T x MXene anchored with magnetic particles has garnered significant attention due to its superior electromagnetic shielding performance and low reflection coefficient. However, current research on MXene-anchored magnetic particles faces several challenges, including complex fabrication processes, difficulty in controlling compositional ratios, the predominant use of spherical magnetic particles. In this work, by employing surfactants, FeCo alloy and Ni flakes were uniformly anchored onto MXene, the preparation process of the composite is simple and facilitates better control over the ratios of individual samples. Due to the unique structure formed by the intercalation of FeCo alloy and Ni flakes within the MXene layers, M-FC-N-35 exhibits an average electromagnetic shielding effectiveness of 61.2 dB within the Ku-band and maintains a reflection coefficient as low as 0.69. Additionally, the M-FC-N-35 composite was applied to the surface of the temperature sensor casing. It was found that under an electromagnetic field strength of 200 V/m and within a frequency range of 6–18 GHz, the temperature measurement deviation was reduced to 9.35 % of that of the sensor without the shielding material, demonstrating high electromagnetic interference resistance. This work provides guidance for simplifying the fabrication process of MXene composites with magnetic metals and enriching the system of electromagnetic shielding materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jinqiu Chen,Xingman Hu,Zhuguang Nie,Yang Feng,Shuhua Qi,Rumin Wang
The development of flexible, thin, multifunctional materials represents a strategic advancement for the creation of next-generation wearables that offer both electromagnetic shielding and thermal management. This study introduces the fabrication of a multilayer MXene/polyimide (MXene/PI) composite film , demonstrating significant electromagnetic shielding effectiveness (EMI SE) and photothermal conversion efficiency through a layer-by-layer casting technique. When the MXene content is 29.7 wt%, the alternating multilayer MXene/PI composite film can reach a high EMI SE of 23.3 dB at 0.26 mm thickness, and when the MXene content is 45.7 wt%, the EMI SE can reach a maximum of 40.7 dB, which has a significant advantage over other materials. This superior performance exceed that of alternative materials, owing to the multilayer MXene construction that magnifies electromagnetic wave reflection losses. Furthermore, the film displays a rapid and sensitive photothermal response under laser irradiation , achieving temperatures up to 93°C at a 0.5 W/cm 2 density. Impressively, at 0.4 W/cm 2 , it maintains a stable long-term saturation temperature over 40 cycles, showing its potential in applications such as photothermal sensors, personal heating, and muscle protection.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Yunzhongze Hu,Yang Zhang,Saihua Li,Gongyu Liu,Xiaosu Yi,Xiaoling Liu
The application of carbon fiber reinforced plastics (CFRPs) in various industries significantly increased the need for sustainable recycling of carbon fiber (CF) to enhance economic efficiency. In this study, we prepared lightweight multifunctional flame-retardant Ti 3 CNT x /Ammonium Polyphosphate (APP)/Polyethyleneimine (PEI)/reclaimed carbon fiber (MArCF) nonwoven veils with superior Electro-Magnetic Interference (EMI) shielding effectiveness (SE) using a combination of multiple vacuum-assisted filtration, improved etching, and delamination strategies, followed by annealing treatments. The resulting MArCF nonwoven veils exhibited an impressive EMI SE of a maximum of 72.65 dB, with a SSE/t value reaching 10730 dB cm 2 g −1 . Moreover, the MArCF nonwoven veil demonstrated excellent flame retardance properties, with a substantial decrease of 63 % in Heat Release (HR) capacity, 60 % in Total Heat Release (THR), and 83.15 % in Heat Release Rate (HRR). The modified veils also exhibited excellent Joule heating and photothermal properties, indicating a promising potential for multifunctional reinforcement in composites.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiang Dong,Guo-wei Dai,Le Xie,De-long Li,Zhiyu Sun,Song Liu
Fire alarm systems are essential for protecting lives and properties from fire hazards. However, most of the existing fire alarm nanopapers rely on the resistance reduction after heating, which requires direct contact with the flame. In this study, we present a novel fire alarm nanopaper (CMPA) based on heat-triggered shape recovery. The CMPA is composed of hydroxypropyl methyl cellulose (HPMC) as the matrix and 2D nanomaterials M(OH)(OCH 3 ) as fillers. When the temperature of CMPA exceeded the glass transition, the thrice-folded CMPA-1.0 flattened in 30s and connected to the alarm circuit based on its conductive surface. According to the results, the CMPA-1.0 with a thickness of about 0.2 mm had an efficient electromagnetic shielding of 42.1 dB. Moreover, the CMPA-1.0 self-extinguished rapidly after being ignited with its original shape preserved. The peak heat release rate of CMPA-1.0 was 108.9 W/g, which was 61.9 % lower than that of HPMC. Furthermore, the thermal conductivity of CMPA-1.0 reached to 0.317 W m −1 K −1 , which was 40.8 % higher than that of HPMC, reducing the heat accumulation effectively. This work shows that CMPA is an ideal material for sensitive and safe early fire alarm, and the strategy based on heat-triggered shape recovery is promising in fire alarm application.
研究领域:
材料科学
·
消防安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yunzhongze Hu,Minqiang Jiang,Xiaoye Cong,Gongyu Liu,Xiaosu Yi,Xiaoling Liu
In recent years, the demand for efficient and flexible electromagnetic (EMI) shielding has increased dramatically to ensure the stability of electronic devices and protect the body from electromagnetic radiation due to the development of wearable electronics and fifth-generation network communication(5G). Nonwovens made from short-cut recycled carbon fibre have shown potential for use in the EMI shielding area due to their economic and ecological benefits. However, achieving lightweight, high-efficiency, and flexible electromagnetic shielding remains challenging. To address this problem, we constructed a lightweight multifunctional recycled carbon fibre (rCF)/ Ti 3 C 2 T x / Poly (3,4-ethylene dioxythiophene): poly (styrene sulfonate) (PEDOT: PSS) nonwoven fabric with double-layered structure, high electromagnetic shielding efficiency (EMI SE), photothermal effect and good Joule heating performance via simple double vacuum-assisted filtration and hot-pressing strategy. Different sizes of Ti 3 C 2 T x flakes were prepared using improved mild etching, ultrasonic and vortex fluid power-focused delamination (PFD) methods. The rCF/Ti 3 C 2 T x /PEDOT: PSS (MPrCF) nonwoven fabric showed superior conductivity (96.18 S/cm), a favourable EMI shielding efficiency of 63.3 dB, and excellent absolute shielding efficiency of up to 13,900 dB cm 2 *g −1 with only 0.25–0.35 mm thickness due to the unique porous double layered lamination structure and high conductivity. In addition, the new MPrCF veil exhibited superior joule heating and photothermal performance with a saturated temperature of up to 290.2 °C at 5v voltage and 112.3 °C at 300 mW/m 2 light intensity. This new rCF veil shows great potential applications in composite reinforcement fields as a lightweight and scalable electromagnetic shielding material.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 12
·2307492
·
IF 13.3
Xue Bi,Kunpeng Song,Ye-Tang Pan,Camila Barreneche,Henri Vahabi,Jiyu He,Rongjie Yang
A dodecahedral superstructure consisting of a single layer of Janus spheres containing ZIF-67 nanodots is prepared by in situ polymerization, with ZIF-67 and bio-based phytic acid (PA) as templates and dopants. It is used to improve the flame retardant, electromagnetic (EMI) shielding, and thermal conductivity properties of polyurea (PUA). By adding 5 wt% polyaniline@cobalt phytate-2.0 (PANI@Co-PA-2.0), the peak of heat release rate and the peak of smoke production rate are reduced by 54.9 and 59.9%, respectively. The peak of CO and CO 2 production also decreased by 46.2 and 53.1%, respectively. A decrease in the absorption intensity of aliphatic and aromatic volatiles is also observed. The fire safety of PUA is greatly improved. In addition, PUA/PANI@Co-PA-2.0 exhibits an EMI shielding capability of 22.4 dB with the help of reduced graphene oxide, which confirms the possibility of PUA material application in the field of electromagnetic shielding. The 5 wt% filler increases the tensile strength of the PUA matrix to 6.3 MPa, and the composite material obtains good thermal conductivity. This work provides a viable method for the preparation of a flame-retardant, conductive, and electromagnetic refractory PUA substrate.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 15
·5191-5201
·
IF 7.059
Tiantian Bai,Yan Guo,Hu Liu,Gang Song,Dianbo Zhang,Yaming Wang,Liwei Mi,Zhanhu Guo,Chuntai Liu,Changyu Shen
High-performance electromagnetic (EM) shielding and absorption materials are in great demand due to the increasing electromagnetic pollution problem in current society. In this study, a lightweight biomass-derived cellulose carbon aerogel (CCA) was prepared via facile carbonization of a cellulose aerogel (CA) under a moderate temperature. Interestingly, the conductivity of CCA could be easily adjusted through changing the carbonization temperature, and higher conductivity was achieved for CCA treated at a higher carbonization temperature due to the differences in the carbon crystal size and carbonization degree of the carbon materials. As a result, the EM shielding performance of CCA is effectively enhanced through increasing the carbonization temperature due to the simultaneously improved dielectric loss and reflection loss, and a superior special shielding effectiveness of 117 dB cm3 g−1 was obtained for CCA700. In addition, based on the good balance between the impedance match and attenuation capacity of CCA640, it displays excellent EM absorption performance, with a minimum reflection loss (RL) of −51.24 dB and a wide effective absorption bandwidth (RL < −10 dB) of 7.68 GHz. Finally, it should be noted that a porous structure is also beneficial for the absorption and dissipation of microwaves through multiple reflections and scattering between adjacent cell walls. In conclusion, the suitable carbonization temperature and special porous structure are the key factors for tuning the EM shielding and absorption capacity of CCA, which will provide an important reference for its practical application in information and military areas.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yanting Wang,Ting-Ting Li,Bing-Chiuan Shiu,Xuefei Zhang,Hao-Kai Peng,Ching-Wen Lou,Jia-Horng Lin
With the increase of electromagnetic radiation pollution, there is an urgent need to develop lightweight, ultra-thin, and high electromagnetic shielding composite film to eliminate unwanted electromagnetic interference. Herein, based on the layer-by-layer assembly strategy, a simple solution dip coating method was used to achieve the combination of two-dimensional transition metal (MXene) and nanofiber film, thereby constructing a conductive composite film with a unique undulating structure. The silicon-containing hydrophobic layer imparted excellent hydrophobic properties to the composite film while maintained the stability of the sandwich structure. The contact angle (CA) of the composite film with ultra-thin thickness (29um) was 125.49° and the conductivity was as high as 71.91 S/cm. The hydrophobic treatment would not damage the flexibility and mechanical properties of the composite film. In particular, the average shielding effectiveness (SE) and SSE/t could as high as 28.82 dB and 12422.41 dB cm 2 g −1 , due to the layered structure formed by the connection of countless MXene nanosheets is beneficial to promote multiple absorption and reflection. This layer-by-layer assembly strategy provides a facile route in fabricating light-weight, flexible and ultrathin composite film for high-performance electromagnetic shielding, which is of great significance for broadening the practical application of MXene-based conductive materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
Zhouping Sun,Jiali Chen,Xichen Jia,Guoqing Wang,Bin Shen,Wenge Zheng
Though conductive polymer composite (CPC) foams have been investigated widely for electromagnetic interference (EMI) shielding owing to their low density and high EM absorption, fabricating high-performance CPC foams through a simple and easy-to-scale preparation process, as well as exploring new approach to achieve the shielding enhancement of CPC foams under mild conditions for meeting some special circumstances that needing higher shielding effectiveness (SE) in a short time, is still of great importance. In this work, multifunctional polyimide/carbon nanotube composite foams (PIF/CNT) were manufactured by the combination of effective chemical-foaming method and simple solution dip-coating approach. The resultant PIF/CNT with ultralow density exhibited the integration of excellent performances on absorbing-dominant EMI shielding with the extreme-temperature adaptability, flame retardancy , thermal insulation , infrared stealth and Joule-heating functions. On the other hand, the idea of humidifying-enhanced EMI shielding is proposed, and the EMI SE of wetted PIF/CNT samples can be massively improved due to the easy adsorption of strongly polar water molecules on the open-cell foam skeleton with hydrophilic poly (vinyl pyrrolidone). By the humidifying-drying cycles to enhance or restore the SE performance, our PIF/CNT material can be adjusted within a certain SE range to achieve intelligent electromagnetic response, providing another important guide for the design of novel intelligent EMI shields.
研究领域:
材料科学
·
电磁学
✓ 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）