Frontiers in Plant Science
·
2024
·
IF 4.1
Zhang Huilan,Yuan Meng,Gao Yameng,Su Pengfei,Jia Huiling,Tang Caiguo,Meng He,Wu Lifang
1. The powdery mildew inhibitor KTP is composed of 1 g/L kaolin, 2 g/L nanotitanium dioxide and 8% (v/v) liquid paraffin.2. KTP is formed by hydrogen bonding and electrostatic attraction between components.3. The prevention effects of KTP in the pot and field experiments were 98.45% and 83.04%, respectively.4. The yield of wheat increased significantly after the control of powdery mildew by KTP.5. KTP delayed the germination of powdery mildew spores on the leaf surface and inhibited the formation of mycelia.
研究领域:
植物病理学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2021
·Vol. 18
·期 4
·1065-1073
·
IF 2.382
Liu Haitao,Cao Hailin,Huang Yudong,Shao Pengcong,Yan Yiwu
An ambient-curable hybrid resin (ACHR) terminated with trimethoxysilane functional groups, synthesized through a simple ring-opening reaction between 3-glycidyloxypropyltrimethoxysilane (KH560) and 4,4′-methylenebis (cyclohexylamine) (PACM), was applied to the surface of a transparent organic polymer to produce a robust, flexible, and transparent protective hybrid film, moisture cured at room temperature. The structure, morphology, and optical, mechanical, and thermal properties of the obtained hybrid film were evaluated. The hybrid film allowed the transmittance of more than 87% of visible light (at 600 nm), maintaining almost the same high transparency as bare PET film. The unique flexible segments and rigid segments in the inorganic–organic hybrid structure of the film realized superior resistance to bending and scratching. The hybrid film-coated PET demonstrated excellent flexibility, with an extremely low bending radius, illustrated by wrapping around a 1-mm mandrel bar without cracking. In addition, the hybrid film exhibited superior pencil hardness (of 2H) and excellent wear durability, i.e., no scratching after being subjected to 200 abrasion cycles using #0000 steel wool under a 19.6 kPa load. The robust, flexible, and transparent protective film developed here, and its simple and efficient preparation method, should have extensive application prospects.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Kun Cui,Fan Xu,Bingyu Tian,Mengyao Liu,Yingying Yao,Haolin Li,Ping Wen,Rui Dong,Mingjin Fan
The poor wear resistance of titanium alloy makes it challenging to develop high-performance lubricating materials. For the characteristic of highly designable structure, ionic liquids (ILs) are the potential lubricants with excellent physicochemical properties and lubricating performance. Herein, three protic phosphorus-based ionic liquids (PPILs) were designed and synthesized with the exploration of their interfacial lubrication behavior and interaction mechanism on the titanium substrate. The as-synthesized IL lubricants exhibit optimal tribological properties on steel-titanium friction pairs even at high load and temperature. The surface analysis showed that IL can form the lubricating protective film on the titanium-based metal surface, effectively reducing the adhesive wear . Combined with surface analysis techniques (SEM, XPS , FIB-TEM and TOF-SIMS), the lubrication mechanism was discussed systematically.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 6
·1042
·
IF 2.467
Li Feng,Shengtao Zhang,Yujie Qiang,Yue Xu,Lei Guo,Loutfy H. Madkour,Shijin Chen
The anticorrosion effect of thiazolyl blue (MTT) for copper in 3% NaCl at 298 K was researched by electrochemical methods, scanning electron-microscopy (SEM), and atomic force microscopy (AFM). The results reveal that MTT can protect copper efficiently, with a maximum efficiency of 95.7%. The corrosion inhibition mechanism was investigated by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectral (FT-IR), and theoretical calculation. The results suggest that the MTT molecules are adsorbed on metal surface forming a hydrophobic protective film to prevent copper corrosion. It also indicates that the MTT and copper form covalent bonds. The molecular dynamic simulation further gives the evidence for adsorption. The adsorption isotherm studies demonstrate that a spontaneous, mixed physical and chemical adsorption occurs, which obeys Langmuir adsorption isotherm. The present research can help us better understand the corrosion inhibition process and improve it.
研究领域:
材料科学
·
电化学
·
表面科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Juan Qiu,Xiang Gao,Guiqiu Li,Kanglu Feng,Kangwei Gongsun,Chunchao Chen,Changming Bu,Houyi Ma
An approach to fabricate protective film on copper substrate utilizing molybdate or tungstate assisted by dithiol was proposed. The fabricated films exhibited double-layer structure. The top layer was an organic layer primarily composed of interconnected dithiol molecules through disulfide bonds originating from the oxidation of molybdate or tungstate. The Cu 2 S bottom-layer formed as a result of the cleavage of C-S bonds subsequent to the adsorption of dithiol molecules onto the copper matrix. The molybdate participated the film via MoO x and MoS x . Although no tungstate species were detected in the film, the oxidizing effect of tungstate facilitated a conversion of dithiol molecules into polymers, resulting in a significantly thicker surface layer. The corrosion protection efficiencies of the films reached 99.7 % and 99.8 %, respectively, attributed to the incorporation of molybdate or tungstate additives. Theoretical calculations provided valuable insights into the process of film formation and elucidated the relationship between film structure and anti-corrosion performance.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Chunyan Tang,Xingwang Zhao,Jinglei Lei,Lingjie Li
Background Due to the highly-active chemical and electrochemical properties, magnesium alloys are easily damaged in harsh environments. So surface films that can provide durable protection are highly desired in applications of magnesium alloys. Methods The film was prepared by the hydrothermal treatment in lanthanum-nitrate solution and the chemical modification in stearic-acid solution. The film was characterized by FESEM, AFM, XPS, FTIR, Raman, CA, high-speed camera, electrochemical polarization and impedance methods. Various mechanical, physical and chemical durability tests were used to comprehensively evaluate the film durability. Findings The as-prepared film has brome-like morphology and is composed of (hydr)oxides/stearates of Mg and La. The film-coated magnesium alloy surface has a static WCA of 154.7 ° and a SA of 6.0 °, showing superhydrophobicity and low-adhesion. The as-prepared film demonstrates durable self-cleaning function and high corrosion resistance of 150 kΩ cm 2 . More importantly, various durability tests confirm that the as-prepared film can provide durable protection for magnesium alloys, which is expected to play an important role in harsh-environment applications of magnesium alloys.
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
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 42
·19726-19736
·
IF 3.3
Xingxin Xu,Hualiang Huang
In this work, Ca(H2PO4)2 was used as a green corrosion inhibitor for AZ91D magnesium alloy in 3.5 wt% NaCl solution. The corrosion inhibition behavior and mechanism were analyzed using electrochemical tests, high-definition video measuring microscopy, scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD). The electrochemical testing results showed that the optimal corrosion inhibition concentration of Ca(H2PO4)2 was 0.6 g L−1, and the highest corrosion inhibition efficiency was 89.29% after 48 h immersion in the corrosive medium. Optical microscopy and SEM images showed that an obvious protective film formed on the Mg alloy surface in solution inhibited with Ca(H2PO4)2. EDS and XRD results showed that the protective layer was composed of Mg(OH)2 + MgHPO4 + Ca3PO4, and MgHPO4 played a major role. The precipitation mechanism of Ca(H2PO4)2 as a corrosion inhibitor was proposed.
研究领域:
材料科学
·
电化学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.039
Yang Zhou,Lei Guo,Zhiheng Zhao,Sisi Zheng,Yue Xu,Bin Xiang,Savaş Kaya
The inhibition performance of domperidone on the corrosion of copper in different concentration of HCl solution has been investigated by electrochemical, weight loss, and surface analysis, and theoretical calculation methods. Results indicate that domperidone was found to be an effective inhibitor with the inhibition efficiency as high as 98.5% when the HCl concentration was 0.01 M, and the corrosion rate of copper increased with the increment of HCl concentration from 0.001 to 1 M. The potentiodynamic polarization results revealed that domperidone can be seen as a mixed type inhibitor when the HCl concentration was high (1 and 0.1 M), while it acted as a cathodic inhibitor for copper at low HCl concentrations (0.01 and 0.001 M). The potentiodynamic polarization results revealed that domperidone can be seen as mixed-type or cathodic inhibitor as the HCl concentration changes. Scanning electron microscopy studies indicated the formation of protective films of inhibitor molecule on copper surface. Besides, density functional theory-based quantum chemical calculations and molecular dynamics simulations showed the electronic structure of domperidone and its optimized adsorption configuration on copper surface, which could account for the experimental findings.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2024
·Vol. 12
·期 8
·1716-1727
·
IF 6.3
Meng Yan,Wen Xiangli,Cheng Jie,Bai Pengpeng,Meng Yonggang,Tian Yu
Most studies of liquid lubricants were carried out at temperatures below 200 °C. However, the service temperature of lubricants for aerospace and aeroengine has reached above 300 °C. In order to investigate the friction mechanism and provide data for high temperature lubrication, the friction and wear properties of chlorophenyl silicone oil (CPSO)-lubricated M50 steel and Si 3 N 4 friction pairs were investigated herein. Ball-on-disk experimental results show that the lubrication performance of CPSO varies significantly with temperature. Below 150 °C, coefficient of friction (COF) remains at 0.13–0.15 after the short running-in stage (600 s), while the COF in the running-in stage is 0.2–0.3. At 200 °C and above, the running-in time is much longer (1,200 s), and the initial instantaneous maximum COF can reach 0.5. Under this condition, the COF gradually decreases and finally stabilizes at around 0.16–0.17 afterwards. This phenomenon is mainly due to the different thickness of boundary adsorption film. More importantly, the wear rate of M50 steel increases significantly with the temperature, while the wear rate barely changes at temperatures above 200 °C. The anti-wear mechanism is explained as tribochemical reactions are more likely to occur between CPSO and steel surface with the increased temperature, generating the FeCl 2 protective film on the metal surface. Accordingly, FeCl 2 tribochemical film improves the lubrication and anti-wear capacity of the system. At high temperatures (200–350 °C), FeCl 2 film becomes thicker, and the contact region pressure becomes lower due to the larger wear scar size, so the wear rate growth of M50 steel is much smaller compared with that of low temperatures (22–150 °C). The main findings in this study demonstrate that CPSO lubricant has good anti-wear and lubrication capacity, which is capable of working under temperatures up to 350 °C.
研究领域:
材料科学
·
摩擦学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2021
·Vol. 10
·期 3
·398-410
·
IF 6.167
Cheng Hao,Zhao Wenjie
Novel two-dimensional (2D) Nb 2 C nanosheets were successfully prepared through a simple lultrasonic and magnetic stirring treatment from the original accordion-like powder. To further study their water-lubrication properties and deal with common oxidation problems, Nb2C nanosheets with different oxidation degrees were prepared and achieved long-term stability in deionized water. Scanning electron microscope (SEM), transmission electron microscope (TEM), scanning probe microscope (SPM), X-ray powder diffraction (XRD), Raman, and X-ray photoelectron spectrometer (XPS) experiments were utilized to characterize the structure, morphology, and dispersion of Nb 2 C nanosheets with different degrees of oxidation. The tribological behaviors of Nb 2 C with different degrees of oxidation as additives for water lubrication were characterized using a UMT-3 friction testing machine. The wear scars formed on the 316 steel surface were measured using three-dimensional (3D) laser scanning confocal microscopy. The tribological results showed that a moderately oxidized Nb 2 C nanosheet, which owned the composition of Nb 2 C/Nb 2 O 5 /C, displayed excellent tribological performance, with the friction coefficient (COF) decreasing by 90.3% and a decrease in the wear rate by 73.1% compared with pure water. Combining the TEM and Raman spectra, it was shown that Nb 2 O 5 nanoparticles filled in the worn zone, and the layered Nb 2 C and C were adsorbed into the surface of the friction pair to form a protective lubricating film. This combined action resulted in an excellent lubricating performance.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 5
·期 11
·1509-1515
·
IF 4.446
Hong Yun Yue,Zhan Li Han,Liang Liang Tao,Yao Fa Zhang,Lan Wang,Xiang Nan Li,Yan Hong Yin,Wei Guang Yang,Shu Ting Yang
Graphical Protective additive : Diphenyl ether (DPE) is investigated as a film-forming additive to improve the cyclic stability of LiNi 0.5 Mn 1.5 O 4 at high voltage and elevated temperature (55 °C). A robust and uniform film is generated on the LiNi 0.5 Mn 1.5 O 4 surface, alleviating the subsequent electrolyte decomposition and protecting LiNi 0.5 Mn 1.5 O 4 from transition metal dissolution and structural destruction. Diphenyl ether (DPE) is investigated as a film-forming additive to improve the cyclic stability of LiNi 0.5 Mn 1.5 O 4 at high voltage and elevated temperature (55 °C). Addition of DPE in the baseline electrolyte significantly improves the capacity retention of LiNi 0.5 Mn 1.5 O 4 at elevated temperature. Its capacity retention increases from 41.2 % at the baseline electrolyte to 90.5 % after 0.1 vol% DPE is added to the baseline electrolyte in 100 cycles. Calculations demonstrate that DPE is oxidized preferentially to the baseline electrolyte. The experimental results show that a robust and uniform film is generated on the LiNi 0.5 Mn 1.5 O 4 surface, alleviating the subsequent electrolyte decomposition and protecting LiNi 0.5 Mn 1.5 O 4 from transition metal dissolution and structural destruction.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Feng Yang,Jiayu Wei,Shihui Qiu,Chengbao Liu,Li Cheng,Haichao Zhao
The corrosion inhibition effect of polylevodopa (poly-(L-DOPA)) on Q235 carbon steel in 1 M HCl was studied owing to its low cytotoxicity and special structure. Electrochemical measurements show that the corrosion inhibition efficiency increases with the increase of poly-(L-DOPA) concentration and the immersion time. When the concentration of poly-(L-DOPA) is 300 mg/L, the corrosion inhibition efficiency can reach 97%. Confocal laser scanning microscopy (CLSM) and field emission scanning electron microscope (FESEM) proved that poly-(L-DOPA) has a good corrosion inhibition effect on Q235 carbon steel immersed in 1 M HCl. Poly-(L-DOPA) adsorbs on the surface of Q235 carbon steel to form a protective film, and followed the Langmuir adsorption isotherm.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）