APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Peng Wang,Yong Wang,Qingbo Xu,Qian Chen,YanYan Zhang,Zhenzhen Xu
Conductive cotton fabrics are widely used in electromagnetic shields and soft sensors because of their excellent softness and comfort. Generally, conductive cotton fabrics are prepared by depositing an inorganic conductive coating or an organic conductive polymer coating on them. However, due to the complex structure of cotton fabrics, these conductive coatings easily fall off and fracture under external forces, resulting in a sharp decline in the conductive properties of the finished fabrics. In the present work, L-cysteine was used as a binder to immobilize Ag NPs on cotton fabric. Ag NPs were covered by PEDOT:PSS to prevent them from falling off and cracking. As a result, the surface resistance of finished fabric was arrived at 8.7 Ω/sq. The finished fabric also exhibited excellent electromagnetic shielding effectiveness, with an electromagnetic shielding reached at 27.1 dB. Moreover, the composite coating significantly improved the durability of electrical conductivity and electromagnetic shielding properties of the finished fabric. In addition, mist polymerization was used to retain the inherent properties of the cotton fabric. We believe that the proposed method provides a new direction for the preparation of conductive cotton fabrics with a high stability.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2023
·
IF 8
Yunsheng Da,Qiang Liu,Ling Kong,Yiming Du,Xingyou Tian,Yanyan Liu,Hua Wang
In this work, a high-performance electromagnetic interference (EMI) latent curing epoxy composites with combination of modified Fe 3 O 4 and carboxylic carbon nanotube (CNTs) were prepared by magnetic orientation. The unique heterogeneous interface among magnetic nanoparticles and conductive nanowires facilitates the loss of interface polarization, the wave absorbance and the dipole polarization, makes EMI SE T of the material reach respectively 45.86 dB in X-band at the thickness of 2 mm ± 0.1 mm, significantly exceeding that of other epoxy-based shielding materials. In addition, the composites show excellent thermal capacity reaching 1.59 W/m·K. What's more, the oriented epoxy mixture can be preserved at room temperature for 40 days maintaining a low viscosity state without curing, which has a strong practical application prospect in the field of electronic packaging 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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xinxin Li,Min Yang,Wenjing Qin,Changshun Gu,Lei Feng,Zhenhao Tian,Hanying Qiao,Junji Chen,Jianxing Chen,Shougen Yin
With the development of wearable intelligent devices, flexible textiles integrate high-performance sensing, electromagnetic shielding and Joule heating show broad application prospects. However, it is still difficult to improve all the performance simultaneously through simple methods. Here, we have prepared MXene/PU composite fiber film with multilayer porous network structure by using the electrospinning spraying alternate operation process. This film has ultra-high sensitivity (GF= 77,751), super large detection range (400%) and ultra-low detection limit (0.05%). Secondly, the multilayer fiber film has excellent EMI shielding performance (EMI SE=38 dB), and the EMI shielding capacity of the multilayer film can still exceed the commercial standard when it is stretched to 20%. Finally, the multilayer fiber film shows better Joule heating performance, including lower voltage drive (2 V) and faster thermal response (12 s). The excellent performance of the composite come from the synergistic effect of MXene and the unique multi-layer porous network structure. Among them, MXene provides excellent conductivity, electrothermal and electromagnetic shielding performance. The layered porous network structure can store the strain in advance and form a parallel circuit, which improves the sensing range, increases the transmission path of electromagnetic waves , and realizes the homogeneity of Joule heating. In addition, the outer PU slows down the invasion of oxygen, thus slows down the oxidation of MXene, and ensures the performance of materials in a long time. The multilayer fiber film has been proved to be suitable for sensing at low temperature, and has broad application prospects in wearability.
研究领域:
材料科学
·
电子工程
·
纺织科学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Teng Zhou,Xiao Zhan,Kunlan Diao,Jiajia Du,Yuhuan Xu,Jingyu Du,Renyuan Yang,Shuhao Qin,Daohai Zhang
With the continuous development of electronic products, polymers with EM shielding have received widespread attention. In this study, Fe 3 O 4 @RGO was prepared by the hydrothermal synthesis method, which solved the problems of Fe 3 O 4 precipitation and RGO stacking. Using it as a precursor, Fe 3 O 4 @RGO/PAM conductive hydrogel was prepared. The research shows that the conductivity of this hydrogel reaches 16.2 S/m at a thickness of 0.3 cm, and the maximum EMI SE is 27.1 dB. Among them, RGO can form a conductive framework, and Fe 3 O 4 can optimize the impedance matching and provide additional magnetic loss. The combined effect of the two makes the hydrogel have excellent EMI SE. In addition, PAM-based hydrogels have good thermal stability, crystallinity, water content, and mechanical properties.
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 RESEARCH BULLETIN
·
2022
·
IF 5.6
Wenjun He,Gang Chen,Chao Li,Xiaohong Chen,Yaowei Chen,Mengyuan Xiong,Xinsheng Niu,Ming Zhu,Xiaoyan Li
The miniaturization and integration of next-generation electronic devices are accompanied by a substantial increase in electromagnetic interference (EMI) and heat generation, which requires light and thin EMI shielding materials. Herein, we attempt to tackle this challenge by designing a heterogeneous membrane using carbon nanotubes (CNTs) and magnetite (Fe 3 O 4 ) nanorods. The polymer-coated Fe 3 O 4 uniformly adsorbs on the surface of the polyaniline (PANi) coated CNTs, forming a self-supporting composite membrane with vertical CNTs under a magnetic field. Due to the entanglement of the CNTs, the vertical alignment is more effective in the top region of the membrane than in the bottom, resulting in an asymmetric structure that is beneficial to EMI absorption. When electromagnetic waves are incident from the top surface, high-absorption electromagnetic shielding is obtained due to multiple attenuations and absorption-reflection losses. The vertical orientation and heterogeneous CNTs network structure of the membrane also enable stable heat dissipation.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 93
·90002-90009
·
IF 3.289
Zhifan Zhang,Wenhui Dang,Chengjun Dong,Gang Chen,Yude Wang,Hongtao Guan
Carbon nanotubes (CNTs)@MnOOH core–shell nanocomposites, in which the CNTs core is uniformly coated with a shell of MnOOH nanoflakes, were successfully synthesized using a facile hydrothermal method. The appearance of sodium dodecyl benzene sulfonate (SDBS) plays a key role in forming the unique CNTs@MnOOH core–shell. A high dielectric loss tangent value was observed for the samples with/without SDBS. Significantly, the CNTs@MnOOH core–shell nanocomposites exhibit an electromagnetic shielding effectiveness of 13–15 dB in the frequency range of 8–18 GHz, which can be attributed to the improved absorption loss, resulting from the increased electrical conductivity, and the improved impedance matching of the core–shell structure. Moreover, the increasing interfaces between the MnOOH and CNTs favor the electromagnetic attenuation performance. Our findings strongly confirm that the CNTs@MnOOH core–shell nanocomposites can be considered as a potential candidate for electromagnetic applications.
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 & DESIGN
·
2016
·
IF 3.997
Pengfei Lv,Wenzheng Xu,Dawei Li,Quan Feng,Yixin Yao,Zengyuan Pang,Lucian A. Lucia,Qufu Wei
In this work, bacterial cellulose was successively functionalized by magnetron sputtering and RF reactive sputtering with copper (Cu) and Al 2 O 3 to endow it with unique anti-oxidation electromagnetic shielding properties while concomitantly improving hydrophobic, mechanical, and thermal properties. The surface topographies and chemical properties of BC/Cu/Al 2 O 3 nanocomposites were examined by different analysis instruments to conclusively testify that metal-based nanoparticles were evenly deposited on the surfaces. This sandwich structure of the nanocomposites enhanced their thermal stability, hydrophobicity , mechanical properties , and electromagnetic interference (EMI) shielding effectiveness (SE). EMI effects of these nanocomposites were also investigated by the four-point probe, uniaxial testing machine and a vector network analyzer (VNA). The results indicated that the sandwich nanoscale materials showed good mechanical properties (41.3 Mpa) and excellent EMI shielding (65.3 dB).
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Junqing Chen,Zhaodong Zhu,Hui Zhang,Shiyu Fu
Biomass-based multifunctional electromagnetic shielding materials have attracted extensive interest in academia and industry due to the sustainability of biomass and the environmental adaptability of multifunctional materials. After removing lignin and hemicellulose wood become a porous substrate with aligned cellulose , which is a good platform for building cellulose-based materials. In this work, a cellulose composite with sandwich-like structure was constructed by in-situ polymerization of aniline on delignified wood and coating a PDMS/CNT layer. Benefiting from the natural porous hierarchical structure and the constructed multilayer continuous conductive network, the PDMS/CNT/PANI WA exhibits excellent electrical conductivity (18.6 S/m) and electromagnetic shielding performance (shielding efficiency value of 26 dB at the X band (8.2–12.4 GHz)). The synergistic effect of PANI and CNT endowed the material with excellent flame retardancy (HRR, THR and HRC decreased by 84 %, 53.4 % and 83.3 %) and significant antibacterial activity . Moreover, PDMS imparts a water contact angle of 105° to the material, which acts as a protective layer, further improves the durability of the material. This work provides a new strategy for developing sustainable and multifunctional electromagnetic shielding materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
YueChao Zhao,Fei Fang
To reduce energy consumption, personal thermal management device has attracted great attention. Developing flexible fibers with low thermal conductivity or low emissivity is crucial but is still a great challenge. In this work, we developed a flexible and versatile composite textile with excellent passive and active heating capabilities. Via designing of the pore morphology and solid phase network, the aerogel textile of TPU/SiO 2 (named as T-textile) is obtained with a low thermal conductivity of 0.037 W/mK. The T-textile also exhibits high flexibility with a fracture strain of 580%, while the low ductility is usually an issue for aerogel textures. Meantime, the conductive textile of TPU/Ag (S-textile) is fabricated with a low infrared emissivity of 0.40 and a high electric conductivity of 248.99 S/mm. The S-textile also possesses excellent electromagnetic shielding capability (above 75 dB). The simulated skin (∼27.4 °C) covered with layers of ST (S + T) and STT (S + T + T) textiles could be warmed to 32.6 °C and 35 °C, respectively. Also, with only 0.6 V, the simulated skin covered with S-textile could be heated to 50 °C, while with the TS textile (the ST textile flipped), it is 58 °C. The composite textile offers a combined solution for thermal insulation , Joule heating, flexibility, breathability and electromagnetic shielding capability, making it a smart personal thermal management device for complex scenarios.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Shangwei Song,Haitao Li,Peiwen Liu,Xianghe Peng
Cellulose , a shining star of nano-dimensional self-assembled unit materials, has perfect biocompatibility, mechanical toughness, low density, and powerful modification potential characteristics, all of which make cellulose and its derivatives gained wide attention in various applications, especially for the expanding market for microwave absorption (MA) and electromagnetic interference (EMI) shielding. In this paper, the latest research progresses of cellulose and its derivatives in MA and EMI shielding, including the state-of-the-art design concepts, synthetic strategies, and electromagnetic characters, were summarized. Different types of cellulose-based electromagnetic components have been classified according to their electromagnetic mechanism of action (shielding or absorption), filler properties (dielectric, magnetic or electrical conductivity), and structural expression (film or aerogel). The benefits stemming from its applications are analyzed, providing novelties and unique perspectives for relevant research. Finally, the main obstacles and bottlenecks for further applications were analyzed, and the trend and prospects of cellulose material's future research were proposed.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 2
·1-17
·
IF 21.8
Jia Fengfeng,Lu Zhaoqing,Huang Tao,Xu Mingyuan,Xu Xiaoxu,Guo Zizhan,Wang Shan,Dong Jiayue,Kou Yajie,Hua Li
The extensive use of wireless communication devices has resulted in severe electromagnetic interference (EMI), which has driven the need for advanced EMI shielding materials. In this study, a twin-coated skeleton hybrid aerogel was constructed from para -aramid nanofibers ( p -ANFs), MXene (Ti 3 C 2 T x ) flakes, and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) chains via a freeze-drying route. The robust chains of p -ANFs established a skeleton with a unique porous structure and reversible compressibility. The twin-coated cloth was composed of 28 wt% PEDOT:PSS and 20 wt% MXene, which endowed the PEDOT:PSS/MXene/ p -ANFs hybrid aerogel with efficient EMI shielding properties. The shielding effectiveness (SE) and specific shielding effectiveness (SEE/t) in the X band (8.2–12.4 GHz) reached 41.27 dB and 3063.7 dB·cm 2 ·g −1 , respectively. Interestingly, the EMI shielding capacity was controlled by the PEDOT:PSS and MXene contents and the PEDOT:PSS/MXene ratio. Moreover, the twin-coated hybrid aerogel exhibited outstanding compressive resilience, with a maximum compressive stress of 61.72 kPa under strain of 60% after 500 cycles. In addition, the relationship between the structure deformation and power coefficient of aerogels was constructed. Thus, this study provides a feasible route for fabricating aerogels with compressibility and efficient EMI shielding performance. Graphical
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 & DESIGN
·
2019
·
IF 5.77
Lulu Xu,Ye Xiong,Baokang Dang,Zhangning Ye,Chunde Jin,Qingfeng Sun,Xiaohong Yu
Lightweight aerogels with superior cavities have attracted great interest in the field of electromagnetic wave absorbing materials. In this work, a hierarchical porous wood aerogel modified with Fe 3 O 4 /ZIF-67 (Fe 3 O 4 /ZIF-67@WA) with high compressibility and low-density was fabricated by in-situ anchoring of magnetic Fe 3 O 4 /ZIF-67 rhombohedral dodecahedron in naturally delignified wood aerogel. Combining the advantages of both aerogels and magnetic Fe 3 O 4 /ZIF-67 particles, Fe 3 O 4 /ZIF-67@WA reveals excellent compression-resilience and efficient microwave absorption performance. It possesses a maximum reflection loss (RL) of about −23.4 dB at a low thickness of 1.5 mm and a specific electromagnetic shielding effectiveness of up to ~156.3 dB cm 3 g −1 . Moreover, the composites exhibit a broad absorption bandwidth under an ultrahigh frequency of 13.5–18.0 GHz. In view of those excellent absorbing effects, the prepared green magnetic Fe 3 O 4 /ZIF-67@WA is likely to be used as a lightweight shielding material against electromagnetic radiation, especially for smart building and miniaturized device applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）