MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Meng Lei Zhou,Li Na Zhang,Yang Liu,Feng Qiang Nan
In order to obtain better quality and mechanical performances, the coating process of super-porous propellants was optimized. The mechanical performances of super-porous propellants were tested, under some conditions with different temperatures, different numbers of cladding layers, different thicknesses of the cladding layer and different ratios of inner and outer layers, through many different analytical methods including impact test, interrupted-burning test and three-dimensional video observation test. The results show that the mechanical performances of super-porous propellants are positively correlated with the temperature, the coating thickness and the ratio of the outer layer. The double-layer coating also can obtain better coating effect than the single-layer coating.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
JOURNAL OF HYDROLOGY
·
2021
·
IF 5.722
Rui Xu,Xianjun Xie,Bangxing Ren,Dionysios D. Dionysiou
Slow-release materials (SRMs) are a promising oxidant delivery technology for in situ chemical oxidation (ISCO) to remove arsenic (As) from groundwater on site. Microcapsules capable of slowly releasing ammonium persulfate (APS) have been developed and applied to aquifer Fe-coating technology. APS microcapsules and dissolved Fe(II) can be injected into an As-contaminated aquifer to boost the formation of hydrous ferric oxide or hydroxide, thus immobilizing aqueous arsenic via adsorption. This study reports on the use of microcapsules with extended release time to control the redox environment in the in situ remediation of As-contaminated groundwater and prevent the reductive dissolution of hydrous ferric oxide or hydroxide. The experimental results demonstrate that microcapsules capable of slowly releasing the APS oxidant were successfully prepared. The core–shell structure of the microcapsules in which APS was enclosed with poly(methyl methacrylate) (PMMA) was confirmed with X-ray diffraction (XRD) and X-ray photo-electron spectroscopic (XPS) analyses, and the uniform morphology of the 1-µm microcapsules was revealed by scanning electron microscopy (SEM). The life span of the APS microcapsules was estimated to be 9 days. Zero-order release kinetics could qualitatively explain the experimental curve and predict the release mechanism. The small microcapsules had satisfactory transport performance in porous media and could represent a more efficient, long-term strategy for in situ remediation of high arsenic groundwater.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
Joule
·
2024
·
IF 38.6
Chunjie Huang,Shan Tan,Bingcheng Yu,Yiming Li,Jiangjian Shi,Huijue Wu,Yanhong Luo,Dongmei Li,Qingbo Meng
Meniscus coating technique is extensively employed for fabricating large-area perovskite films. Based on this technique, there are still challenges of formamidinium lead triiodide (FAPbI 3 ) nucleation and crystallization in the film-forming process, which significantly hinders the device performance of perovskite solar cell (PSC) modules. Here, we developed a kind of meniscus-modulated blade coating method combined with solvent engineering to realize scalable, high-quality α-phase FAPbI 3 films with larger grain sizes, preferred crystal orientation, excellent uniformity, and controllable thickness. On this basis, a notable 25.31% power conversion efficiency (PCE) for small-area cells (0.09 cm 2 ) and 23.34% PCE for minimodules (aperture area: 12.4 cm 2 ) with a certified PCE of 23.09% have been achieved. Besides, this minimodule exhibited exceptional device stabilities by remaining above 93% of the initial value after 2,000 h outdoor aging testing. This work provides a very promising meniscus coating fabrication method to realize high-performance FAPbI 3 perovskite solar cells and photovoltaic modules.
研究领域:
材料科学
·
太阳能电池技术
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薄膜制备工艺
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bolin Yang,Changliu Kuang,Zhenglong Liu,Chao Yu,Chengji Deng,Jun Ding,Zhoufu Wang,Shixian Zhao
In order to effectively improve the density and oxidation resistance of ZrB 2 -SiC coating materials, HfB 2 was added into ZrB 2 -SiC system and their physical properties, oxidation resistance were explored. It was observed that the flexural strength of the spark plasma sintered sample with 8 vol% HfB 2 was 717.1 MPa, which was 162.6 % higher than that of the sample without HfB 2 (273.1 MPa). At the same time, the oxidation activation energy of the sample with 15 vol% HfB 2 was increased to 511.98 kJ/mol, showing excellent oxidation resistance. The oxidation process is that HfB 2 and ZrB 2 were oxidized prior to SiC to form HfO 2 and ZrO 2 to form a dense oxide layer on the outermost layer of the sample, and SiC reacted to form a second dense SiO 2 layer to hinder oxygen intrusion. In summary, diboride can achieve the synergistic effect of improving the oxidation resistance and structural optimization of ZrB 2 -SiC-HfB 2 coatings composites, which provides a theoretical basis for its practical application.
研究领域:
材料科学
·
高温材料
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·
IF 1.8
Pengju Chen,Peng Xiao,Tian Tian,Yang Li
Ytterbium silicate (Yb 2 Si 2 O 7 ) and lanthanum zirconate (La 2 Zr 2 O 7 ) ceramic powders were synthesized by the sol–gel method. A novel tri-layer La 2 Zr 2 O 7 /Yb 2 Si 2 O 7 /SiC environmental barrier coating was prepared on the surface of C/SiC composites to improve the service temperature of the coating (above the Si melting point, 1683 K). Results show that both Yb 2 Si 2 O 7 and La 2 Zr 2 O 7 ceramic powders had extremely high purity and were accompanied by a large number of nanoparticles. The tri-layer La 2 Zr 2 O 7 /Yb 2 Si 2 O 7 /SiC coating can efficiently prevent the oxidation failure of C/SiC composites in 1773 K air environment for more than 100 h with slight weight loss of 5.71 × 10 −3 g·cm −2 and the matching weight loss rate of 5.71 × 10 −5 g·cm −2 ·h −1 . No significant chemical reaction was observed between Yb 2 Si 2 O 7 middle and La 2 Zr 2 O 7 outer coatings during the oxidation process at 1773 K, indicating that the tri-layer La 2 Zr 2 O 7 /Yb 2 Si 2 O 7 /SiC coating had better oxidation stability in 1773 K air environment.
研究领域:
材料科学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 6
·741
·
IF 2.9
Huixian Kong,Jinhui Fu,Rentong Yu,Mingyu Wang,Jinchun Tu,Qiang Wu,Xuewei Zhang,Lina Niu,Kexi Zhang
Traditional antifouling coatings are toxic to marine life, which makes developing new environmentally friendly marine antifouling coatings imperative. Antifouling coatings that are nonadhesive and antimicrobial may provide an effective approach to achieving this goal. In this study, an organic–inorganic composite coating consisting of fluorinated polyurethane (FPU) and carboxymethyl chitosan–zinc oxide (CMC–ZnO) was prepared to achieve antifouling. The coating took advantage of the complementary bioactive effects of the low surface energy of FPU and the antimicrobial properties of CMC–ZnO. The coating showed good antifouling performance, with a survival rate forEscherichia coliof 3.15% and that forStaphylococcus aureusof 3.97% and an anti-protein adsorption rate of more than 90%. This study provides a simple method for preparing antifouling coatings using nonpolluting raw materials with minimal adverse effects on marine environments.
研究领域:
材料科学
·
环境科学
·
海洋生物学
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Haiqing Liu,Muhammad Jawad,Jingmao Zhao,Baomin Fan,Mohammad Tabish,Muhammad Mubeen,Mubashar Mahmood,Jingbao Wang
Under-film filiform corrosion (FFC) poses a significant challenge to the durability and reliability of Zn–Al–Mg-coated steel (ZM-steel), necessitating the development of advanced protective strategies. Herein, benzotriazole 5-carboxylic acid (BTC)-modified titanium zirconium (TiZr) conversion coatings (CCs) were developed as a sustainable solution to mitigate FFC, enhance corrosion resistance, and improve the adhesion of epoxy (EP) coatings on ZM-steel. Through electrochemical impedance spectroscopy, potentiodynamic polarization, FFC, and neutral salt spray (NSS) tests, the optimized BTC-TiZr CC, prepared in a Ti–Zr solution containing 0.5 g/L BTC, a treatment temperature of 25 °C, and a short immersion duration of 120 s, exhibited superior corrosion resistance, robust adhesion strength, and exceptional FFC inhibition. Metal–organic complexes (MOCs) of Ti/Zr/Zn with BTC were identified alongside mixed Ti/Zr/Zn/Al/Mg oxides and fluorides within the BTC-TiZr CC. BTC not only exerted strong corrosion inhibition efficacy for ZM-steel but also facilitated the formation of MOCs with metal ions in TiZr conversion solutions (CSs). Density functional theory calculations revealed that BTC preferentially adsorbs onto the MgZn2 phase, effectively suppressing its dissolution within the ZM layer. These findings establish BTC-TiZr CCs as a promising, environmentally friendly solution for advanced corrosion protection of ZM-steel, especially FFC suppression.
研究领域:
材料科学
·
腐蚀工程
·
表面工程
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电化学
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涂层技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Yongqiang Chen,Mao Chen,Beibei Tang,Guoqi Liu,Hongxia Li,Hailong Wang,Bingbing Fan
A uniform, dense, and well-bonded mullite/Y 2 Si 2 O 7 /ZrO 2 (MYZ) composite barrier coating was synthesized using a spraying technique followed by a two-step sintering process. The microstructure, phase composition, and thermal shock resistance of the MYZ coating were systematically investigated. The sintering process comprised two stages. In the initial stage (25–1350°C), granular mullite grains transformed into columnar crystals with progressive growth. Concurrently, a eutectic composite of mullite and Y 2 Si 2 O 7 formed and dispersed within the grain boundaries, significantly enhancing the coating's density and adhesion. In the subsequent stage (∼1400°C), ZrO 2 reacted with the eutectic composite to produce yttria-stabilized zirconia (YSZ) in situ. The YSZ phase exhibited excellent interfacial compatibility with the substrate, markedly improving the coating's high-temperature stability. As a result, the coating achieved high hardness and a coefficient of thermal expansion matching that of the SiC substrate. Remarkably, the MYZ coating withstood 20 thermal cycles between 25°C and 1200°C without noticeable interfacial damage.
研究领域:
材料科学
·
高温材料
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Siyi Li,Bin Liu,Huayang Tian,Yujie Ning,Shuo Wu,Yihan Song,Qi Wang
The practical application of photocathodic protection (PCP) technology has been hindered by its failure in darkness. In this work, The BiVO 4 /MoO 3 composites were synthesized through a simple hydrothermal method, which were used as functional fillers, and then added to polyurethane resins to prepare energy-storing PCP coatings. This achievement enabled efficient PCP even in darkness. The 304 stainless steel coated with PCP coating (PB 10 M 1 ) exhibited excellent photoelectrochemical properties as photocurrent density of 394 μA/cm 2 , and the corrosion potential decreased by about 350 mV. Furthermore, the cathodic protection effect of PB 10 M 1 could last for 15 h in the dark, showing exceptional stability, superior energy-storage ability and potential application. The superior PCP performance of BiVO 4 /MoO 3 should be attributed to the cooperative effect in heterojunction structure and electronic regulation revealed by electrochemical characterizations and DFT calculation.
研究领域:
材料科学
·
电化学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Yiqian Lv,Jingmao Zhao,Baomin Fan,Hassan Murtaza,Jingbao Wang,Weixiao Jing,Liuwei Chao
Synergistical passive barrier enhancement and active self-healing has been an emerging tactic for developing prominent anti-corrosion coatings. Herein, a cerium/2-methylimidazole metal-organic framework (Ce-MOF) was that is in-situ grown on ultrathin α-ZrP nanosheets with outstanding dispersibility. The parallel arrangement of α-ZrP-based nanosheets within the epoxy matrix was driven by shear force from blade-coating technology optimizing the coating's physical barrier and self-repairing capability. This advancement may herald a new era in designing smart coatings and offering potent protection against diverse corrosion types such as filiform corrosion.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xianmin Gong,Yi He,Liping Yan,Huilian Zhou,Yiling He,Kaijun Wei,Quangang Chen,Shijun Xu
In this study, vanadium carbide (VC) was used as the raw material to synthesize PDA-functionalized VC (P-VC). VC and P-VC were added as nanoreinforced materials to the Ni–W–B coating. The effects of the two nanomaterials on the morphology, wear resistance, and corrosion resistance of the Ni–W–B coatings were investigated and compared. The experimental results show that the surface of the Ni–W–B/P-VC coating is denser and more uniform than that of the Ni–W–B and Ni–W–B/VC coatings, and there are no obvious defects on the surface. According to the hardness test, the Ni–W–B/P-VC coating reaches the highest microhardness of 887.1 HV. According to the friction and wear tests, the Ni–W–B/P-VC coating has the shallowest scratches, the lowest average friction coefficient (COF = 0.274), and the lowest wear rate (9.578 × 10–8 mm2/N). The corrosion resistance is the best, the corrosion rate is 0.0456 mm/y, and the impedance value Rt reaches 14,501 Ω·cm2.
研究领域:
材料科学
·
表面工程
·
涂层技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Zhenlin Tang,Meihuan Gao,Haidi Li,Ziyang Zhang,Xinying Su,Yingge Li,Zhishuang Han,Xinmeng Lv,Jing He,Zaihang Zheng,Yan Liu
Nowadays, steel is one of the most significant materials in industry and daily life. Unfortunately, the defects of steel structures such as collapse at high temperature, poor corrosion resistance, and bad surface functionality have severely restricted their further application. Applying functional coatings for steel structures is considered the effective strategy for settling theses disadvantages. Inspired by nature, eco-friendly, superhydrophobic, and multifunctional-integrated coatings were fabricated on steel via one-step spraying strategy in this paper. Along with silicon dioxide (SiO 2 ) nanoparticles and epoxy resin/silicone resin (EP/SR), the coatings are jointly constituted by hydrophobic flame retardants (M-ALHP@ZIF-8) prepared via multi-stage modification. Due to the formation of micro/nano-scaled rough structure with low surface energy, the water contact angle (WCA) and water sliding angle (WSA) of as-prepared coatings can reach 162.4° ± 1.2° and 2.8° ± 0.4°. The water repellency with low water adhesion can endow the surface of steel with excellent self-cleaning, anti-fouling, and long-lasting anti-corrosion ability. Additionally, the superhydrophobic coatings have displayed good mechanical robustness, chemical stability and weather resistance, which can exhibit certain actual values. Accorded with Zn-catalyzed charring effect of flame retardants, as-prepared coatings have possessed outstanding fire protection capacity with the lowest backside temperature of 181 °C after 1 h fire impact tests. Consequently, this work has provided a facile and effective route for synchronously tackling the key challenges of poor fire protection and surface functionality for steel structures, which will be expected to pave the wide pathway for constructing multifunctional coatings in more fields.
研究领域:
材料科学
·
表面工程
·
涂层技术
·
消防安全工程
✓ 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）