RSC Advances
·
2022
·Vol. 12
·期 16
·9836-9844
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IF 4.036
Zixu Ma,Beibei Yang,Junjiao Yang
Magnetic materials are being increasingly used in anti-counterfeiting coatings, but the dark colors of magnetic materials greatly limit their applications. This necessitates the development of light-colored magnetic materials. In this study, the heterogeneous precipitation method was used to deposit a layer of titanium dioxide (TiO2) on the surface of magnetic spherical metal particles, followed by the deposition of a layer of Ag by the reduction method, in order to achieve a light color. In the experiment, the particles were initially coated with a few tens of nanometers of TiO2 with a strong shading effect, followed by a further coating of Ag of the same thickness with a similar shading performance. Not only did this achieve a lighter color, but there was no reduction in the magnetic properties of the material after the application of the coating. Scanning electron microscopy (SEM), scanning electron microscopy and energy-dispersive spectroscopy (SEM-EDS), X-ray diffractometry (XRD), and other methods were used to study the changes in morphology and composition before and after the magnetic material was coated. A magnetic tester was used to study the changes in magnetic strength before and after the magnetic material was coated.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
IF 3.752
De-xin CHEN,Ye-qing HE,Qi-wei WANG,Wei LI,Zhi-xin KANG
A facile method was proposed to prepare stretchable silver-based composite coatings with excellent conductivity and stability for flexible electronics. Silver coating was firstly deposited on thermoplastic polyurethane (TPU) elastomer rubber surface via two-component spraying technique, then the superhydrophobic surface was obtained by one-step electrodeposition of cerium compounds (CeM) and graphene nanosheets (GNS) to produce Ag/CeM/GNS composite coatings. The obtained Ag/CeM/GNS composite coatings maintained high conductivity after experiencing bending cycles and stretching cycles. Furthermore, the as-prepared Ag/CeM/GNS composite coatings showed excellent self-cleaning and anti-fouling properties, and the corrosion resistance has improved significantly compared to the original Ag coating. In addition, the Ag/CeM/GNS composite coatings could drive the circuit normally in the states of tensile, bending and twisting deformation, showing excellent mechanical stability and applicability. As a result, it is believed that the prepared Ag/CeM/GNS composite coatings with excellent conductivity and stability have promising applications for flexible electronics in harsh conditions.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Zhicheng Ding,Chenghao Zhang,Yang Liu,Chun Li,Xiaoqing Si,Zongjing He,Zhiquan Wang,Jian Cao
AlN metallization substrates hold broad application potential in the field of electronic packaging due to their high thermal conductivity and unique electrical insulation properties. The present work reports a method for preparing Ag coatings by directly pressing and sintering micro-Ag particles on the AlN surface in air without additional brazing fillers or pre-treatment. The in-situ formation of the Ag-containing Al 2 O 3 interlayer (~200 nm) is critical for the interfacial bonding at the AlN/Ag interface. The diffusion of Ag particles into Al 2 O 3 not only enhances the interfacial adhesion of the Ag layer but also improves thermal conductivity. Notably, AlN/Ag exhibits a high bonding strength of 67.6 MPa with an excellent thermal conductivity of 178.7 W·m -1 ·K -1 at 950°C. The Ag layer demonstrates superior surface hardness and electrical conductivity at 900°C due to its high density and low grain boundary density.
研究领域:
材料科学
·
电子封装技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Yalin Zhu,Yu Chi,Shuen Liang,Xuan Luo,Keping Chen,Chunrong Tian,Jianhua Wang,Lin Zhang
Fast heat transfer is very important for practical application of phase change materials . Herein, a novel kind of silver coated nanoencapsulated phase change materials (NanoPCMs) with high thermal conductivity were prepared, and their properties were examined. Dopamine surface activation was carried out on silica nanocapsules containing n-octadecane, followed by electroless plating in Tollen's reagent. Chemical composition and crystallinity of the original silica nanocapsules, polydopamine modified NanoPCMs, and silver coated NanoPCMs were characterized by FT-IR, XPS , and XRD methods . Microstructure and morphology of these NanoPCMs were observed by SEM and TEM. Phase change property, thermal stability, thermal reliability, and thermal conductivity of these NanoPCMs were measured by DSC , TG, thermal cycling test, and laser flash methods, respectively. Although the mass-based latent heats decline obviously after silver plating due to high density of metallic Ag, the volume-based latent heats only exhibit minor decrease. These NanoPCMs crystallize mainly based on heterogeneous nucleation and show low supercooling, by introducing n-octacosane as nucleating agent . Moreover, they can keep constant phase change properties during multiple melting/solidifying thermal cycles. Most importantly, the apparent thermal conductivity of the silver coated NanoPCMs increases significantly from 0.246 to 1.346 W/m K. Owing to these excellent properties, the silver coated NanoPCMs are promising for thermal energy storage and thermo-regulation applications.
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
Science China-Technological Sciences
·
2023
·Vol. 66
·期 10
·2797-2807
·
IF 4.6
Jiang Miao,Xiao Chao,He XuSheng,Du HuiChao,Wang YanYan,Ding Xin,Zhang Xian,Li XiaoFei,Zheng Kang,Liu XiangLan,Chen Lin,Tian XingYou
In hot environments, the human body shows an efficient capability to maintain a stable temperature by benefiting from sweating behavior. Inspired by this skin perspiration strategy, in this study, we demonstrated an innovative polyimide foam (PIF)-based mimetic skin with excellent cooling capability by integrating a silver coating and reusable hydrogel for the first time. Because of the hybrid thermal dissipating system, the successive silver coating quickly transferred heat to the inside of the polyacrylamide hydrogel. Meanwhile, the hydrogel absorbed a large amount of heat due to its large enthalpy and effectively dissipated heat to the environment through the evaporation of moisture, similar to the sweating of skin. Thus, the temperature of the skin-like film was reduced by 25.4°C compared with pure PIF under a high-power laser heating source. Identical and remarkable cooling effects were also obtained in mobile phone and battery applications, far better than commercially available thermally conductive polyimide (PI). This outstanding performance paves a new way for the thermal management application of PI in wearable electronics, microprocessors, and flexible electronics.
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
Nanomaterials
·
2023
·Vol. 13
·期 4
·624
·
IF 5.3
Nuo Chen,Kexin Sun,Huicong Liang,Bingyan Xu,Si Wu,Qi Zhang,Qiang Han,Jinghai Yang,Jihui Lang
A novel engineered carbon cloth (CC)-based self-cleaning membrane containing a Cu:TiO2and Ag coating has been created via hydrothermal and light deposition methods. The engineered membrane with chrysanthemum morphology has superhydrophilic and underwater superoleophilic performance. The cooperativity strategy of Cu doping and Ag coating to the TiO2is found to be critical for engineering the separation efficiency and self-cleaning skill of the CC-based membrane under visible light due to the modulated bandgap structure and surface plasmon resonance. The CC-based membrane has excellent oil–water separation performance when Cu is fixed at 2.5 wt% and the Ag coating reaches a certain amount of 0.003 mol/L AgNO3. The contact angle of underwater oil and the separation efficiency are 156° and 99.76%, respectively. Furthermore, the membrane has such an outstanding self-cleaning ability that the above performance can be nearly completely restored after 30 min of visible light irradiation, and the separation efficiency can still reach 99.65% after 100 cycles. Notably, the membrane with exceptional wear resistance and durability can work in various oil–water mixtures and harsh environments, indicating its potential as a new platform of the industrial-level available membrane in dealing with oily wastewater.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Guannan Yang,Pengyu Wang,Yu Liu,Shuzhou Lu,Bo Luo,Tao Lai,Shiwo Ta,Tingyu Lin,Jiye Luo,Yu Zhang,Chengqiang Cui
Ag-coated Cu particles (Cu@Ag particles) are highly anticipated bimetallic materials with wide electronic applications. However, it is still crucially challenging to obtain well-covered Ag shells and facilitate the synthetic process, and the sintering/migration behaviors of Cu@Ag particles are also poorly understood. In this study, we develop a facile Ag coating method for Cu@Ag particles with the assistance of double complexing agents. Electrochemical analysis reveals that the complexing effect can effectively reduce the potential difference of the Cu-Ag replacement reaction, and thereby improve the coating quality. Cu@Ag particles with compact and uniform Ag shells are obtained, with Ag contents as low as ~10 at%. The as-prepared Cu@Ag particles show significantly improved oxidation resistance and reliable sintering property. Moreover, the Cu@Ag particles exhibit superior ion migration resistance even better than both Cu and Ag particles under an oxygen-containing environment. The results could provide helpful basis for understanding the synthesis, sintering and migration processes of Cu@Ag particles. The comprehensive performance of Cu@Ag particles makes them a promising interconnected material in future electronic industry.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Xue Wang,Tingjun Wang,Chengsheng Gui,Hanxiang Guo,Haili Chen
s Bamboo is a sustainable and renewable material. However, its high hydrophilicity and nutrient-rich composition make it highly susceptible to microbial colonization. In this study, a simple two-step strategy was employed to fabricate stable nano-silver particles (AgNPs) containing polymer composites on bamboo surfaces to enhance antibacterial and anti-mold properties. L-3,4-dihydroxyphenylalanine (L-DOPA) was modified onto the bamboo surface via self-polymerization, providing catechol groups capable of chelating and reducing Ag⁺ ions in situ to form AgNPs. The incorporation of polyethyleneimine (PEI) into the L-DOPA could further promote AgNPs formation and enhance stability of the composite coating. The resulting BT/L-D/PEI/Ag sample was systematically characterized by SEM, XRD, FTIR, XPS, EDS, and water contact angle measurements. The results confirmed that L-D/PEI/Ag polymer composites were successfully coated onto the bamboo surface, and the BT/L-D/PEI/Ag exhibited a significantly enhanced silver loading (6.68 wt%) compared to the BT/L-D/Ag (2.97 wt%), corresponding to a 125 % increase. The modified surface showed improved hydrophobicity with a contact angle of 94.7°, effectively inhibiting microbial adhesion. Antibacterial tests revealed that the BT/L-D/PEI/Ag achieved complete (100 %) inhibition against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), as well as superior antifungal activity against Aspergillus niger ( A. niger ). The synergistic interaction between L-D, PEI and Ag formed an efficient antimicrobial coating, providing a promising strategy for the development of high-value, antimicrobial bamboo materials for sustainable construction and consumer products.
研究领域:
材料科学
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表面工程
·
纳米技术
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抗菌技术
·
可持续材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Central South University
·
2019
·Vol. 26
·期 6
·1443-1448
·
IF 0.973
Tang Yi-qun,Liu Xi,Huang Xiao-bing,Ding Xiang,Zhou Shi-biao,Chen Yuan-dao
Li 2 FeSiO 4 is deemed to be a potential candidate for large-scale applications because of its abundance, low cost and high safety, etc. Unfortunately, its low conductivity, resulting in poor rate performance, has become a main obstacle to its applications in power battery and energy storage system. In this work, C-Ag coated Li 2 FeSiO 4 is introduced to improve the innate electronic conductivity and Li-ion diffusion ability. The results demonstrate that Li 2 FeSiO 4 /C/Ag composite exhibits better electrochemical performance. It possesses a specific discharge capacity of 152, 121, 108 mA∙h/g at 0.2 C , 5 C and 10 C , respectively. At the same time, the Li 2 FeSiO 4 /C/Ag composite shows good cycle stability and a capacity retention ratio of 97.9% after 100 cycles at 1 C .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Gui Yang,Xiaoyuan Zhang,Jingzhan Zhu,Fengmei Su,Yuezhan Feng,Youxin Ji,Chuntai Liu,Changyu Shen
Developing stretchable electromagnetic interference (EMI) shielding wearable fabrics is crucial in light of the increasing electromagnetic pollution. However, achieving satisfactory stretchable shielding ability is challenging due to the significant difference in modulus between the elastic matrix and rigid conductive network. In this study, a dual wrinkled conductive network with macro-wrinkles on the surface of fabric and micro-wrinkles on the surface nanofiber was constructed by in situ anchoring silver coating onto a pre-stretched thermoplastic polyurethane (TPU) electrospinning fabric. The unique geometric dual-wrinkled structure not only enhances the EMI shielding performance from 57.9 dB to 77.8 dB by reinforcing multiple reflecting/scattering. More importantly, it can protect the conductive network from damage during stretching, achieving stretchable EMI shielding performance with maintaining effective shielding of 36 dB under 100 % tensile deformation. Notably, the EMI shielding performance can be restored to the initial level after strain recovery and still holds over 65 dB even after cyclic stretching for 500 times. Additionally, the dual-wrinkled structure imparts stretchable Joule heating and photothermal conversion abilities to the fabric enabling controllable personal thermal management. With its excellent hydrophobicity, gas permeability, and mechanical stretchability, the dual-wrinkled EMI shielding fabric holds significant prospects for the next generation of wearable electronics.
研究领域:
材料科学
·
电子纺织品
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2024
·
IF 2.3
Yu Tianlong,Song Gendi,Tian Wenjie,Liu Tingting,Yan Mengying,Wu Bei,Lu Shixiang
Superwetting materials play a crucial part in the fields of chemistry and materials science and draw increasing attention. Among the various applications, superwetting materials demonstrated up-and-coming potential in oil spill remediation. Herein, we report on the preparation of silver-coated copper mesh via a facile chemical deposition and annealing treatment approach that requires neither complex devices nor modification with toxic organic molecules. The resulting sample exhibited remarkable water repulsion (water contact angle of ~ 158° and sliding angle of ~ 1°) and oil affinity (oil contact angle of ~ 0°), contributing to superior separation ability toward various oil–water mixtures (hexane, toluene, benzene, chloroform, tetrachloromethane, kerosene, gasoline, diesel) or effectively cleaning up the floating or underwater oil spill. Moreover, the resulting silver-coated superhydrophobic/superoleophilic copper (Ag-coated SS Cu) mesh demonstrated great durability upon the water flow impact or the abrasion test and was able to continuously separate the toluene–water mixtures over 20 times with an efficiency over 97%. In addition, the sample readily prevented surface fouling via self-cleaning process and exhibited antibacterial ability toward Escherichia coli , Staphylococcus aureus , and Bacillus subtilis as witnessed by the corresponding bacteriostatic circle (11.38 ± 0.76 mm, 12.65 ± 0.68 mm, and 12.87 ± 0.72 mm, respectively) in the Petri dish.
研究领域:
材料科学
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化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 8
·期 1
·1-12
·
IF 23.2
Hao Changxiang,Chen Junde,Chen Yonghao,Jiang Chengwei,Wang Ziqiang,Pan Tingting,Cheng Xing,Tian Yanqing
Array-patterned anisotropic conductive films (A-ACFs) possessing periodically arranged conductive particles distributed in curable resins can have high circuit-bonding precision; however, the preparation of A-ACFs is a challenging work. On the other hand, the traditional electrolysis coating of metal on polymer cores as the conductive particles needs long preparation steps. Herein, a new simplified approach uses polyaniline (PANI) as an intermediate layer to wrap the polystyrene (PS) microspheres and also chelate silver to prepare silver-coated PS microspheres (PS@PANI@Ag). Through a series of experimental regulation, neat PS@PANI@Ag microspheres with an average diameter of 4.73 ± 0.13 μm possessing a silver layer of about 65 nm and weight percentage of 23.6% were prepared. For developing A-ACFs, an approach is loading the prepared particles into the microcavities with a diameter of 6 μm and depth of 4 μm in silicon template through rubbing assembly process, transferring these particles onto the surface of a kind of chosen polymerizable acrylate resin to keep their periodicity, and embedding these particles in the polymeric resin films. These A-ACFs were used to bond indium-tin-oxide (ITO) and flexible-printed circuits (FPC) with 200-μm spacing to achieve low connection resistance of 1.78 ± 0.03 Ω/0.4 mm 2 and high insulation resistance over 200 MΩ. After aging at 85 °C and 85% relative humidity condition for 120 h, the connection resistance change is less 9.8%, showing the bonded device’s good environmental stability. The anisotropic property was also demonstrated using a homemade device through turning LEDs on or off. Therefore, the conductive particles’ and A-ACFs’ preparation methods may provide new insights for ACFs’ designing strategy and application in industry. 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
危险品化学品经营许可证（带存储）