CERAMICS INTERNATIONAL
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2024
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IF 5.1
Jiangtao Li,Xiaoxia Hu,Junpeng Jiang,Anran Guo,Liwen Yan,Haiyan Du,Linlin Guo,Jiachen Liu
Ceramic fiber fabric embrittlement at 1200 °C, resulting in poor tensile strength. In order to improve the tensile strength of ceramic fiber fabric after high temperature heat treatment. In this study, gradient coating is sprayed on the surface of ceramic fiber fabric by adjusting the composition of two kinds of slurry. The structure and property of ceramic fiber fabric with different coating are thoroughly investigated. The pore size of Al 2 O 3 -SiC porous transition layer is less than 1 μm, which limits the infiltration of the high-emission coating into the ceramic fiber fabric. A weak bond is formed between the ceramic fiber fabric and the porous transition layer, which induces the crack deflection. The flexibility of ceramic fiber fabric after heat treatment is significantly improved. After being heated by butane flame at 1200 °C for 20 min, the tensile strength of fiber fabric with gradient coating is double that of raw ceramic fiber fabric. The silicone cross-links to form a network, which improves the bonding strength of the gradient coating. Due to the high emissivity and low thermal conductivity of the gradient coating, the temperature of the ceramic fiber fabric is below 900 °C when heated by the butane flame.
研究领域:
材料科学
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涂层技术
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产品关联
DOI
高影响因子
STAR Protocols
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2023
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IF 0
Wenjun Chen,Jiahao Tang,Siying Gou,Yuanhu Xu,Junlong Sun,Qing Zhu,Bo-Tian Liu
Summary In this protocol, we present a modified gradient coating strategy for zinc anodes. We describe steps for synthesizing electrodes, measuring electrochemistry, and assembling and testing batteries. The protocol can be applied for broadening design ideas of functional interface coating. For complete details on the use and execution of this protocol, please refer to Chen et al. (2023). 1
研究领域:
材料科学
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电化学
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能源存储
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DOI
PubMed
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zhiqing Hu,Li Zhang,Lili Ren,Jiang Zhou
Gradient refractive index coatings have attracted significant attention in the field of optics due to their antireflective performance over a broad range of wavelength and incident angle. Herein, single layer coatings with various refractive indices were prepared using suspensions of zwitterionically charged chitin nanofibers (ZC-ChNFs) containing different amounts of sodium dihydrogen citrate (SDCA) via layer-by-layer self-assembly. Subsequently, the coatings with different gradient refractive indices were fabricated by stacking the single layers together. Effects of the number of the stacked layers and the changes of gradient refractive index on antireflective performance of the coatings were investigated. The results showed that the gradient refractive index coating with five layers and a quadratic change in refractive index with downward opening yielded gains of 6.6 % at 550 nm and 7.6 % at 650 nm in the transmittance (vertical incidence) of a glass slide, and the transmittance gain of a glass slide coated with this coating reached 8 % at light incident angle of 45°. This work not only demonstrates that SDCA can be used as pore generation agent to reduce refractive index of ChNF coatings, but also offers a feasible pathway to construct gradient refractive index coatings possessing excellent broadband and omnidirectional antireflective performance using ChNFs.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhenbo Wang,Wenwei Qiu,Hujun Huang,Xiaocheng Huang,Xiangcong He,Minghui Jin,Ruhao Zhang,Xiao Shi,Wenna Liu,Yumin Ye
Omniphobic liquid-like surface (LLS) offers excellent dynamic liquid repellency owing to the highly mobile polymer chains mediating at the solid–liquid interface. These polymer chains, often achieved by surface grafting, are not durable against abrasion or oxidation, which seriously hinders their practical application. Here we report a new vapor-based approach to create transparent nanogradient coating for LLSs with unprecedented mechanical strength and durability. The nanogradient coating is composed of a sandwich structure with an ultrathin primer, a rigid bulk, and a nanocomposite surface with abundant polydimethylsiloxane-like chains, all of which achieved via sequential plasma polymerization of a linear and a cyclic siloxane. The plasma-polymerized cyclic siloxane enables coating good mechanical strength while the plasma-polymerized linear siloxane confers coating sub-nanometer roughness and excellent dynamic liquid repellency. The resultant coating exhibits contact angle hysteresis < 5° towards many low-surface-energy liquids, as well as good mechanical strength with the hardness exceeding 1 GPa and superior durability enduring 100,000 cycles of abrasion. The coating also survived industrial standard thermal and accelerated UV-aging tests without losing its liquid repellency and transparency. The reported method is facile, scalable, and substrate-independent, offering exciting new opportunities towards industrial fabrication and real-world application of LLS.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Jiaquan Miao,Yizhou Shen,Jie Tao,Xiaofei Zeng,Senyun Liu,Zhen Wang
Composites used in aircraft are vulnerable to mechanical and thermal damage during particle impact at high speeds. In this paper, a series of gradient polyurethane silica coatings with different silica particle sizes and concentration gradients were prepared on epoxy resin matrix composites by pneumatic spraying process. The results of corundum impact and thermal insulation performance experiments indicated that multi-layer gradient coatings improved the particle impact resistance and thermal insulation. The damage was reduced to <1 % of surface damage area and thickness loss under the protection of enhanced gradient coatings, showing excellent particle impact resistance. Under unidirectional heating conditions, the temperature difference between the heating plate and the sample surface was four times that of the unprotected sample, from 2.2 °C to 9.4 °C, and the total thermal conductivity of the protected sample was reduced by 91.73 %. The coatings remained intact under high-speed particle collision of 300 A plasma flow, which verified the protection performance of the coatings simulating the situation that the coatings were impacted by particles and heated simultaneously. The as-prepared gradient coatings can effectively enhance the anti-impact and thermal insulation performance of composites, exhibiting wide application prospects.
研究领域:
材料科学
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航空航天工程
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2025
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IF 6.6
Yine Ren,Zhongqiang Yu,Wen Sun,Kaixin Xu,Junzhe Fan,Lida Wang,Zhengqing Yang,Guichang Liu,Qian Wang,Junhai Luo
Simultaneously improving the corrosion protection performance and mechanical stability of coatings is a challenge in the preparation of superhydrophobic coatings. In this paper, a novel controlling sedimentation method is developed to prepare multifunctional superhydrophobic gradient coatings. The prepared gradient coating exhibits excellent superhydrophobicity with a contact angle of 156° with great chemical stability and wear resistance after the immersion of pH = 1H 2 SO 4 and pH = 10 NaOH solution for 60 days and 180 times of sandpaper grinding. In addition, a persistent high corrosion resistance to 10 wt% H 2 SO 4 solutions, and no cracking occurred after 240 cycles of -60 – 140 °C cold-thermal shock. This research has positive implications for the development and application of corrosion-protective organic coatings of heat exchanger equipment in the harsh environment of desulfurized flue gas, it can be applied to actual industrial production.
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产品关联
DOI
高影响因子
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