PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yadong Yu,Lei Chen,Ding Weng,Jiadao Wang,Chaolang Chen,Awais Mahmood
Ice accretion is detrimental for the safety of transmission lines, aircraft, and buildings, which may also result in economic loss. In this study, a thin polytetrafluoroethylene (PTFE) coating on the aluminum substrate was fabricated by electrostatic attraction self-assembly technique and proposed for large-scale deicing application. The shear-force F i c e analysis on deicing and related ice adhesion is conducted while interfacial toughness between solid-ice interfaces was also measured. Moreover, the surface morphology, wettability of the PTFE coated aluminum plate was also characterized. It was observed that the critical bonded length L c between ice and PTFE coated surface is about 2.85 cm. When the bonded length L was higher than this value, the shear-force of dislodging ice could stay constant at about 50 N for the first deicing cycle. From the second deicing cycle, the constant shear-force is increased to 70 N and kept constant for at least ten cycles. Meanwhile, the surface roughness and water contact angle kept on increasing along with the loss of PTFE nanoparticles during icing-deicing cycles. Ultimately, An ice layer with the size of 98 cm × 96 cm×1 cm (L × w×h) was developed on the surface of PTFE coated aluminum substrate for the demonstration of its fracture and falling off under ice’s weight.
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
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Jinheng Zhang,Fei Cheng,Lin Wang,Yang Xu,Ziteng Zhou,Xinyu Liu,Yunsen Hu,Xiaozhi Hu
Aluminum alloy and carbon fiber reinforced plastic (Al-CFRP) composite are usually applied to the lightweight design and manufacture of important field equipment due to the lightweight and high strength . However, the high performance and industrialization of Al-CFRP composites are restricted by degumming issues caused by poor wetting and compatibility, and weak mechanical occlusion of bonding interface between epoxy resin and substrates. In this study, anodizing treatments with three temperatures were employed to etch Al substrate surface for various pore structure , CFRP panels were grinded to create a strong CFRP/epoxy bonding interface to compare the performances changing resulting from treatments on Al substrate surface. Resin pre-coating (RPC) technique was used to eliminate the originally existing defect caused by macromolecular epoxy at the root of porous Al substrate in common adhesive bonding . The carbon nanotubes (CNTs) were utilized to improve the bonding interfaces and adhesive layers. The single lap shear results showed the best shear strength of anodized specimen at 30 °C was up to 23.4 MPa improved by 268.9 % than base. Failure modes exhibited the weaker debonding failure at Al/epoxy interface was converted into dominated fiber fracture and delamination failure of CFRP after combined surface treatments. These results indicate associative treatments of anodizing at 30 °C and CNTs-contained RPC are effective and contribute to developing a solution in industrial application of high-performance Al-CFRP composites.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiumei Li,Renli Fu,Ran Lu,Yunjia Hu,Wencong Huang,Guoping Bei,Guangming Liu,Bingjie Xie,Xuhai Liu
Creating high-precision conductive lines on alumina substrates is a significant challenge in advanced circuit manufacturing, which is constrained by complex processes and environmental sustainability. We present a laser-assisted copper activation pretreatment for alumina metallization. The selective activation has been achieved both on the surface and in the holes of alumina ceramics through the synergistic coupling between laser-textured surface regions and copper-active particles. High-resolution metallization layers with excellent surface quality are then produced on the alumina surface using simple electroless copper plating (ECP), demonstrating excellent stability and weldability. The optimized conductive layers exhibit a sheet resistivity of approximately 1.1 mΩ/□ and a minimum line width of 50 μm. Additionally, this technique is compatible with through-ceramic-via (TCV) sidewall metallization, enabling both circuit patterning and vertical interconnection on the substrate. This new approach offers significant benefits over traditional methods, including a simplified workflow, reduced chemical hazards, and superior resolution, making it promising for multi-layer wiring and through-hole vertical interconnection in ceramic-based high-density circuit substrates.
研究领域:
先进电路制造
·
材料科学
·
表面工程
·
微电子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Li Meng,Mingzhong Li,Zhenyu Xu,Tianlan Chen,Meiwan Chen,Joana Vaz Pinto,Bruno Veigas,Man-Kay Law
Precise temperature control and measurement are crucial for in vitro nucleic acid denaturation, especially in melting curve analysis (MCA). However, the inherent cumbersome multi-step calibration process required to obtain an accurate spatial temperature gradient can be a major limitation for the study of MCA on existing microfluidic chips. This work proposes to obtain a highly linear temperature gradient with a functional substrate for achieving high-resolution MCA on a digital microfluidics (DMF) platform. Taking advantage of the high thermal conductivity of aluminum, we employ a thin trapezoidal aluminum plate as the DMF substrate to compensate for the uneven heat transfer caused by temperature differences at different substrate positions and the ambient environment. We further pattern a banded superhydrophilic thread on the superhydrophobic surface to passively achieve a liquid thread by driving the mother droplet through the electrowetting on dielectric (EWOD) effect. With a heater and a cooler positioned at the opposite ends of the substrate, we can create a highly linear (simulated R 2 = 1 and experimental R 2 = 0.9998) temperature gradient from 40°C to 90°C across the liquid thread, requiring only temperature calibration at the two end points. The elimination of laborious temperature calibration steps can effectively enable rapid, continuous and reliable nucleic acid amplification as well as MCA on DMF. The high temperature accuracy also ensures simultaneous multiple hybrid DNA detection for rapid one-time discrimination of single nucleotide mutations in KRAS gene targets. This innovation underscores the DMF platform's potential in the realms of biomedical research and clinical diagnostics.
研究领域:
生物医学工程
·
微流控技术
·
分子诊断学
·
生物化学
·
遗传学
·
芯片实验室技术
·
临床诊断学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jian Xu,Xin Liu,Zikang Yu,Hongjin Zhang,Zixiang Zhang,Yun Mou,Mingxiang Chen,Yang Peng,Qing Wang
Laser-driven white lighting is believed to be a future-oriented high-brightness solid-state light (SSL) source, which is confronted with a severe challenge in developing a laser-driven color converter with efficient thermal management. Herein, a unique architecture of phosphor-in-glass film bonded with a microchannel cooling (PiGF-MC) converter was proposed to enable high luminescence saturation for high-brightness laser-driven white lighting. The PiGF consisted of yellow-emitting Y 3 Al 5 O 12 :Ce 3+ (YAG) was sintered on an alumina substrate and then soldered on a liquid-cooled microchannel radiator, which realizes outstanding heat dissipation performance of laser-driven PiGF. The PiGF-MC converter possesses luminance saturation threshold under a high laser power density of 21 W mm −2 , 2.3 times that of the traditional PiGF-alumina converter (∼9 W mm −2 ). High-brightness laser-driven white light is achieved by the PiGF-MC with a high luminous flux of 2953 lm@21 W mm −2 , and long-term stable optical performance is simultaneously realized. The working temperatures of laser-driven PiGF-MC are all lower than 200 °C under various laser powers. This finding demonstrates the broad prospect of the proposed PiGF-MC converter architecture for next-generation high-brightness laser-driven white lighting.
研究领域:
光学
·
材料科学
·
热能工程
·
照明技术
✓ 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）