CHEMICAL PAPERS
·
2020
·Vol. 74
·期 7
·2123-2131
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IF 1.68
Zhai Xueying,Guo Jingdong,Zhang Wenshu,Yang De’an
In this study, the zeta potential on the surface of copper powder was adjusted by changing the pH value and adding cetyltrimethylammonium bromide (CTAB). Silica sol was coated directly on copper powder through physical adsorption. The as-prepared SiO 2 -coated copper powders were mixed with organic vehicle and screen printed on low-temperature co-fired ceramic substrate to form copper films. The binder-burn-out process of the films was carried out at 550 °C for 1 h in N 2 /H 2 O atmosphere and then sintered at 910 °C for 1 h in N 2 atmosphere. The results proved that zeta potential had a major effect on the coating morphology of SiO 2 -coated copper powder. The SiO 2 -coated copper powder with a weight ratio of 1% showed a uniform and smooth surface. When the CTAB concentration was 1 × 10 –4 mol/L, the copper powder exhibited the highest zeta potential of 98.2 mV, and the copper film had the best conductivity with a sheet resistance of 1.8 mΩ/□.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuwei Ye,Wei Liu,Zhiyong Liu,Haichao Zhao,Liping Wang
Novel trianiline-containing sol-gel hybrid coatings were prepared by one-step electrodeposition technology on the surface of Q235 steel. The chemical component, microstructure of the as-prepared coatings were measured by FTIR, UV-vis, SEM. The effects of deposition time on the thickness, contact angle (CA) and surface roughness of coatings were investigated. The results showed that the modified silica coatings exhibited an excellent hydrophobic nature. By comparing with various deposition times (100, 300, 500, 700 s) under the deposition potential of -1.5 V, the coating under the deposition time of 500 s presented the best anti-corrosion effectiveness for bare steel substrate in 3.5 wt.% NaCl solution as verified by Tafel curves and electrochemical impedance spectroscopy (EIS).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Haochen Zhou,Mengbiao Liang,Ting Chen,Yiyuan Peng,Wenkui Wu,Youpeng Li,Mengdi Zhao,Chunxian Guo,Zhixiang Xie
All-inorganic perovskite nanocrystals (NCs) offer excellent optoelectronic properties but suffer from poor stability under environmental factors such as water, oxygen, and heat, which limits their broader applications. To address this, we developed a two-stage heating method to synthesize cruciform CsPbBr3 NCs, followed by embedding them in a silica matrix to enhance both fluorescence and stability. The CsPbBr3 NCs measured 30.5 nm in length and 28.5 nm in width. Coating with SiO2, derived from 3-aminopropyl triethoxysilane (APTES) with an APTES/Pb molar ratio of 2.0, increased the photoluminescent quantum yield (PLQY) from 65% to 87%. The CsPbBr3@SiO2 composite retained 27% of its fluorescence after 210 min in ethanol, while the pristine CsPbBr3 NCs were almost fully quenched. After storage in water for 24 h, the PL intensity was 43.5% for the CsPbBr3@SiO2 composite and 3.6% for uncoated NCs. At 398 K, the composite retained 31% of its PL while uncoated NCs were nearly fully quenched. The CsPbBr3@SiO2-based white-light-emitting diode (WLED) exhibited a color rendering index (CRI) of 40.4, a correlated color temperature (CCT) of 5218 K, and a luminous efficiency of 35 lm/W, covering 134.5% of the NTSC color gamut, demonstrating excellent potential in WLED applications.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yuwei Ye,Zhiyong Liu,Wei Liu,Dawei Zhang,Haichao Zhao,Liping Wang,Xiaogang Li
This paper provided a novel coating system for Q235 steel using electrodeposited oligoaniline modified silica coating (E-M-SiO 2 ) as a pre-process coating, which was prepared by one step coelectrodeposition of a mixture of tetraethyl orthosilicate (TEOS) and N,N′-Bis(4′-(3-triethoxysilylpropylureido)-phenyl)-1,4-quinonenediimine (TSUPQD). Microstructure, contact angle, electroactivity and anticorrosion performance were investigated by FTIR, UV–vis, AFM, SEM, OCA20 contact angle analyzer, CV and CHI-660E electrochemical workstation. The CA test indicated, in comparison with pure silica and sol–gel modified silica hybrid coatings, the electrodeposited modified silica coating exhibited a super hydrophobic performance. The CV test illustrated that the special redox property of aniline trimer was maintained in these modified silica hybrid coatings. More importantly, the anticorrosion effectiveness for Q235 steel in 3.5% NaCl solution was improved by the addition of oligoaniline modified silica as the pre-process coating. By comparison, it turned out that the epoxy/E-M-SiO 2 coating system presented the lowest i corr value and the highest |Z| 0.01Hz value. The corrosion protection mechanism was the synergistic effect of super hydrophobic nature of E-M-SiO 2 pre-process coating and special catalytic capability of aniline trimer unit, which effectively restrained the permeation of corrosion medium and induced the formation of passive films consisted of α-Fe 2 O 3 and Fe 3 O 4 on the Q235 surface.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Rui Fan,Ying Huang,Xiaopeng Han,Xuanyi Peng
To obtain high performance composites for thermal management fields, we adopt a new route to prepare the graphite flakes (Gf)/aluminum (Al) composites via vacuum pressure infiltration process. In this study, aluminum nitride (AlN) particles were used as supporting particles to obtain infiltration pathways for the penetration of the molten Al matrix. Gf, starch , urea and AlN were mixed evenly in the mass ratio of 1: 0.035: 0.058: 0.3 and then sintered at 330 °C to prepare porous preforms. It was observed that these substances had excellent chemical compatibility using characterization equipment. The improvement of the thermal transfer and mechanical properties of the composites for silicon coating was also studied. When the volume fraction of graphite was about 54%, compared with the samples without coating, the samples with SiC coating displayed an excellent thermal conductivity (TC) of 467.8 W/m·K and a promising bending strength of 58.8 Mpa, which increased about 82.1 and 238.0%, respectively. The coefficient of thermal expansion (CTE) of composites also decreased about 23.3% from 2.19 × 10 −5 K −1 to 1.68 × 10 −5 K −1 from room temperature to 380 °C.
研究领域:
材料科学
·
热管理工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2015
·
IF 3.005
Beibei Li,Xiaoyan Liu,Xinying Zhang,Wenbo Chai
Stainless steel mesh with its high compressive strength, anti-chemical erosion and not readily stained with water properties has been used in the application of oil–water separation. This study describes a facile method for fabricating both highly hydrophobic and superoleophilic meshes by coating silica particles. After the modification of silica particles, the stainless steel mesh became more hydrophobic and oleophilic. The water contact angle on the modified mesh was up to 135.3°, while the oil droplets could penetrate the mesh rapidly. The modified meshes could separate oil from water effectively without depending on any extra power or chemical agent. It could be a good potential candidate in the employment of oil–water separation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2016
·
IF 5.154
Yuhang He,Houbin Li,Liguo Ou,Fuyuan Ding,Zhan Zhan,Yuye Zhong
In order to improve the corrosion resistance and dispersiveness of aluminium pigments in aqueous media, SiO 2 -coated aluminium was prepared and polyacrylic acid brushes were grafted on its surface. A decrease in hydrogen generation indicated that the corrosion resistance was improved by the SiO 2 coating, while the polyacrylic acid brushes improved dispersiveness. The d (0.5) (particle size of 50% volume fraction) values of the SiO 2 -coated aluminium sample and that of the sample with the polyacrylic acid brushes grafted on it were 41 μm and 29 μm, respectively. We believe that thus modified aluminium will find use in water-based paints and printing inks.
研究领域:
材料科学
·
表面化学
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产品关联
DOI
高影响因子
IONICS
·
2012
·Vol. 19
·期 5
·739-745
·
IF 1.288
Yao Jinhan,Shen Chaoqi,Zhang Pinjie,Gregory Duncan H.,Wang Lianbang
Thin SiO 2 shell consisting of nano-SiO 2 particles can be deposited on to LiMn 2 O 4 through the facile hydrolysis of tetraethoxysilane (TEOS) as a solution in either methanol or ethanol. The structure and surface morphologies of the modified and pristine materials were characterized by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The choice of solvent (methanol vs. ethanol) for TEOS hydrolysis has a profound effect on the physical and electrochemical properties of the resultant SiO 2 -coated LiMn 2 O 4 . Coated LiMn 2 O 4 demonstrated an improved cycling ability compared to the uncoated counterpart. Moreover, samples coated using a TEOS–methanol solution showed better cycling ability in extended potential windows and at an elevated temperature than that coated using ethanol.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Chunyuan Jiang,Xinrui Zhang,Haizhen Ji,Jie Zhang,Xingjian Li,Shoufang Xu,Faqiang Li,Yinwen Li
Fluorine/silicon-free waterborne polyacrylate/nano-ZnO composite cotton fabric coatings (EPSAs) were developed to address the potential environmental and health risks posed by traditional fluorine-containing finishing agents. A molecular bridge constructed by 1,6-hexanediol diacrylate (HDDA) formed a crosslinked network, promoting synergistic directional alignment of tert-butyl and long-chain alkyl groups to create a low-surface-energy chemical hydrophobic barrier. Meanwhile, the polyvinyl alcohol (PVA) modified nano-ZnO not only improved the dispersibility of nano-ZnO, but also enhanced its mechanical stability through the hydrogen bonding interaction and interpenetrating network structure between PVA molecular chains and the polyacrylate main chains. Additionally, the PVA-modified nano-ZnO and polyacrylate jointly constructed a micro-nano rough structure on the fiber surface. This effectively inhibited water adsorption and enhanced impermeability. This hierarchical synergistic effect enabled the optimized EPSA 4 coating membrane to achieve 5.4 % water absorption over 7 d while the coated cotton fabric demonstrated a 128° water contact angle with 2.5 h effective water impermeability that remained stable after 50 washing cycles. Additionally, the coating significantly enhanced the cotton fabric's UPF value from 30.5 to 93.3 and achieved antimicrobial efficiencies of 99.98 % against Escherichia coli and 99.95 % against Staphylococcus aureus . By retaining their inherent breathability, this innovative coating system provided cotton fabrics with long-term hydrophobicity, antimicrobial functionality, and UV resistance, offering an environmentally sustainable multifunctional textile solution for applications including medical protective garments, outdoor technical textiles, and other sectors requiring integrated performance and eco-friendly characteristics.
研究领域:
材料科学
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纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Feiyan Huang,Zhuoting Zhao,Zhiqin Yang,Fang He,Hongguang Sun,Yuexiang Li,Zhenxing Wang
Rare earth mining produces a large amount of acidic oily wastewater, which causes serious environmental pollution. Developing an acid-resistant oil–water separation membrane is an effective way to solve the above problems. In this work, we successfully construct a protein-induced silica coating on polyvinylidene fluoride (PVDF) membrane with the aid of adhesion protein for highly efficient separation of acid emulsion. The obtained coating is composed of ovalbumin (OVA), tannic acid (TA), TiO 2 , and SiO 2, which can endow the PVDF membrane with excellent underwater superoleophobicity and desirable acid resistance. Moreover, the modified membrane has excellent anti-oil-adhesion property, which can keep withstand fouling even an oil droplet is continuously squeezed into the membrane for 2 h under acidic conditions. The outstanding anti-oil-adhesion property is due to the bound water of the multilayer coating, which is confirmed by low field-nuclear magnetic resonance (LF-NMR). The flux recovery can reach up to 98 % and oil rejection rate can reach up to 99.7 % toward strongly acidic emulsion. In addition, the multilayer coating also possesses good stability, which can withstand ultrasonic treatment and washing. Considering the mild preparation process without expensive/complex equipment and the desirable performance, this strategy may become a powerful tool for preparing acid-resistant membranes for efficient treatment of acidic emulsion.
研究领域:
环境科学
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材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2021
·
IF 3.627
Dong-Guang Liu,Ting-Ting Yang,Yu-Lan Liu,Lai-Ma Luo,Yu-Cheng Wu
Tritium permeation is an essential challenge that should be solved in fusion reactors. In this study, the inner wall SiO 2 coating of the 316L stainless steel pipeline for tritium permeation barrier (TPB) is prepared by slurry-spraying method. The microstructure, phase composition, thermal shock resistance, and hydrogen permeation resistance of the SiO 2 coating are investigated. Results show that the coating is amorphous SiO 2 , and the coating is bonded well to the substrate and the thickness of the coating is about 10–15 μm. After six thermal shock treatments, the SiO 2 coating exhibit good thermal shock resistance stability below 700 °C. Results from the hydrogen penetration test indicate that the hydrogen resistance capability of the SiO 2 coating is 16-fold higher than that of the 316L stainless steel substrate. Hydrogen resistance is also 6-fold more stable than that of 316L stainless steel. These characteristics improve significantly the hydrogen resistance performance of the 316L stainless steel substrate.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Haitang Yang,Yanping Yang,Xueqiang Cao,Xiaozhong Huang,Yang Li
A Yb 2 SiO 5 /mullite/Si tri-layer environmental-barrier-coating (EBC) were coated on SiC f /SiC substrates via Air Plasma Spraying (APS). The thermal cycle tests (TCT) were conducted under thermal corrosive condition of vapor-oxygen (50 vol% H 2 O and 50 vol% O 2 ) with thermal shock from 1200 °C to 200 °C. Microstructures, weight loss and bonding strength of the samples were systemically investigated after 101, 396, 606 and 700 TCT cycles respectively. The results show that the corner of the tri-layer coating peel off from the sample with weight loss of 1.3% after 700 TCT cycles. The bonding strength between substrate and tri-layer coatings gradually decreases to 6.79 MPa (approximately 55.2% of virgin specimens) after 700 cycles due to thermal shock induced cracks distributed horizontally within Si layers and between Si layer and outer layers.
研究领域:
材料科学
·
航空航天工程
✓ 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）