JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Qi Wang,Shaopeng Fu,Xingyao Yang,Qinghao Sun,Junwei Zhang,Yichun Peng,Rongling Zhang,Zezhou Liang,Jianfeng Li
An organic nitrogen/oxygen-rich polymer (PFN-NDIN) was prepared via Suzuki reaction between 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-bis(3-N,N- dimethylaminopropyl)-9H-fluorene (FNB) and 4,9-dibromo-2,7-bis(3-(dimethyl-amino)propyl)naphthalenediimide (NDINBr 2 ) and utilized as a new inhibitor for HRB400 steels corrosion in alkaline medium of simulated concrete pore solution. The inhibition efficiency of this inhibitor was evaluated by electrochemical techniques. The electrochemical impedance spectroscopy (EIS) results showed that the protective capacity of PFN-NDIN on HRB400 steel increased with increasing concentration to attain 92.85% efficacy with 400 ppm at 288 K. Potentiodynamic polarization (PDP) plots indicated that PFN-NDIN is effective and acts as a hybrid inhibitor. The adsorption behavior of PFN-NDIN was fitted and found to follow the Langmuir isothermal adsorption line, with discussion of the relevant thermodynamic parameters. The effect of temperature on this inhibitor's the rust-inhibiting effect was investigated. The surface was then studied, showing that the interfacial corrosion of HRB400 steel was inhibited by PFN-NDIN molecules. The relationship between PFN-NDIN molecules’ structure and the inhibition efficiency was investigated by quantum chemical calculations. Several parameters were calculated, the findings revealed that the prepared materials correlated well with their electronic contribution capability.
研究领域:
材料腐蚀与防护
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高分子化学
·
电化学
·
建筑材料科学
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表面科学
·
量子化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Yuhua Dong,Siyi Li,Qiong Zhou
The self–healing capability of epoxy coatings modified with coaxial core–shell nanofibers loaded with the corrosion inhibitor 2–mercaptobenzothiazole (MBT) was investigated using electrochemical techniques. The polyvinyl alcohol/polyvinylidene fluoride core–shell nanofibers were prepared by coaxial electrospinning. Electrochemical impedance results showed that the MBT–loaded coaxial nanofibers improved the barrier properties and decreased the corrosion activity of the coatings. Results of the Scanning Kelvin Probe technique revealed that the MBT–loaded coaxial nanofibers healed corrosion over artificial defects exposed to NaCl electrolytes. These results indicate that adding MBT–loaded coaxial nanofibers to epoxy coatings is a promising strategy toward the development of self–healing epoxy coatings.
研究领域:
材料科学
·
高分子化学
·
腐蚀与防护
·
表面工程
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2013
·Vol. 66
·期 1
·133-138
·
IF 1.66
Peng Shusen,Zhao Wenjie,Zeng Zhixiang,Li He,Xue Qunji,Wu Xuedong
In this report, hybrid silica sol–gel coating was prepared using Ce(NO 3 ) 3 (Sol-Ce) as catalyst. Structure, surface morphology and anticorrosion ability of Sol-Ce solution/coating were studied by infrared spectroscopy (IR), scanning electron microscopy, energy dispersive spectrometer (EDS), potentiodynamic scan (PDS) and electrochemical impedance spectroscopy (EIS). IR results showed that Ce(NO 3 ) 3 had a stronger influence on reactivity of alkoxysilane. EDS results revealed that the fraction of Fe in Sol-Ce coating was significantly lower than regular acid-catalyzed hybrid silica sol–gel coating (Sol-Ac) and Sol-Ac with Ce(NO 3 ) 3 -doped coating (Sol-Ac/Ce). The results of PDS and EIS demonstrated that Sol-Ce coating had better anticorrosion ability than Sol-Ac and Sol-Ac/Ce on carbon steel. The enhanced anticorrosion performance of the Sol-Ce coating might result from the following two reasons: (a) Ce(NO 3 ) 3 as a catalyst could alleviate the negative effects of low pH with using acid catalyst (dissolution of carbon steel) and (b) Ce(NO 3 ) 3 could impede corrosion of carbon steel as corrosion inhibitor.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
无机化学
·
电化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Haihua Wang,Wenjing Zhang,Yongning Ma,Guiqiang Fei,Huan Wen,Liyu Sun,Yanming Shao,Yong-Mook Kang
The compatibility between polypyrrole (PPy) and waterborne epoxy coating (EP) remains the main challenge. Here, phosphorylated poly (vinyl alcohol) (PPVA) and p-toluene sulfonic acid sodium (p-TSA) were simultaneously utilized as dopants to modify PPy and prepare water dispersible PPVA/p-TSA/PPy (PPVAT/PPy) solution. Additionally, poly (vinyl alcohol) (PVA) and TSA were also adopted to prepare PVA/p-TSA/PPy (PVAT/PPy) for comparison. Denser film with granular morphology was observed for PPVAT/PPy nanocomposite film. Compared with PVAT/PPy-40 %, the tensile strength of PPVAT-8.0 %/PPy-40 % increased from 248.8–283.9 MPa. PPVAT/PPy displayed higher compatibility and interactions with EP compared to PPy-TSA and PVAT/PPy. Compared with EP, the impedance modulus of PVAT/PPy+EP and PPVAT/PPy+EP increased from 3.17×10 5 to 1.07×10 8 and 1.62×10 9 Ω·cm 2 ; corrosion current density I corr decreased from 1.49×10 −6 to 7.72×10 -8 and 4.01×10 -9 A·cm -2 ; corrosion potential E corr displayed a positive shift of 230 mV and 269 mV, respectively. The corrosion inhibition efficiency of PPVAT/PPy+EP reached 99.83 %, which is much higher than that of PVAT/PPy+EP (93.97 %). PPVAT/PPy+EP nanocomposite coating has been proved to have preferable long-term corrosion resistance based on electrochemical impedance spectra (EIS), polarization curves and salt water spray test. The simultaneous incorporation of phosphate anions, sulfate ions and PPy into EP was beneficial to fabricate high-performance anticorrosion coating.
研究领域:
材料科学
·
高分子化学
·
腐蚀防护
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纳米复合材料
·
表面工程
✓ 已验证
DOI
高影响因子
SOLID STATE COMMUNICATIONS
·
2021
·
IF 1.804
Shaohui Su,Jiahao Yu,Xianguo Liu,Jieyi Yu
Magnetic-dielectric composites attract numerous attentions for good microwave absorption performances based on magnetic-dielectric loss mechanism and tunable electromagnetic parameters. Fe/carbon fibers are prepared through carbonization of Fe doped polyaniline nanotubes , in which Fe nanoparticles are embedded in carbon fibers. The introduction of Fe nanoparticles results in good electromagnetic impedance and proper quarter-wavelength cancellation induced, which ensure that microwave penetrate composites to the great extend and is consumed as much as possible, leading to enhanced microwave absorption performance. The minimal reflection loss of Fe/carbon fibers composites starts being less than −10 dB from 1.7 mm and is up to −44.09 dB at 6.62 GHz and 4.1 mm and the effective bandwidth reaches 6.0 GHz with 2.4 mm.
研究领域:
材料科学
·
电磁学
·
纳米复合材料
·
功能材料
·
微波工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Hanyu Huo,Ning Zhao,Jiyang Sun,Fuming Du,Yiqiu Li,Xiangxin Guo
Paramount attention has been paid on solid polymer electrolytes due to their potential in enhancement of energy density as well as improvement of safety. Herein, the composite electrolytes consisting of Li-salt-free polyethylene oxides and 200 nm-sized Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 particles interfacially wetted by [BMIM]TF 2 N of 1.8 μL cm −2 have been prepared. Such wetted ionic liquid remains the solid state of membrane electrolytes and decreases the interface impedance between the electrodes and the electrolytes. There is no release of the liquid phase from the PEO matrix when the pressure of 5.0 × 10 4 Pa being applied for 24 h. The interfacially wetted membrane electrolytes show the conductivity of 2.2 × 10 −4 S cm −1 at 20 °C, which is one order of magnitude greater than that of the membranes without the wetted ionic liquids. The conduction mechanism is related to a large number of lithium ions releasing from Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 particles and the improved conductive paths along the ion-liquid-wetted interfaces between the polymer matrix and ceramic grains. When the membranes being used in the solid-state LiFePO 4 /Li and LiFe 0.15 Mn 0.85 PO 4 /Li cells at 25 °C, the excellent rate capability and superior cycle stability has been shown. The results provide a new prospect for solid polymer electrolytes used for room-temperature solid-state lithium batteries .
研究领域:
材料科学
·
电化学
·
能源材料
·
固态电池
·
高分子电解质
·
离子传导机制
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Yang Guo,Xiaoying Guo,Haipeng Lu,Xian Jian
Developing high–efficient microwave absorbing (MA) materials with anti–corrosion (AC) properties to tackle the harsh hygrothermal marine conditions remains a challenge. Herein, we employed catalytic chemical vapor deposition and the Stöber technique to fabricate gradient multilayer interface–coupled FeNi@C@SiO 2 composites, guided by the hetero–interface engineering. The resulting composites exhibited exceptional MA properties and AC behavior. Specifically, they showcased a remarkable effective absorption bandwidth of 6.27 GHz at 1.40 mm, outperforming that of FeNi (3.80 GHz). This improved bandwidth was attributed to the electron conduction pathway provided by the C layer, which facilitated electron migration and hopping. The C@SiO 2 layer, containing defects and –OH functional groups, induced abundant dipole polarization and optimizes the impedance matching of FeNi. Furthermore, the RCS reduction value of FeNi@C@SiO 2 could reach 16.73 dB·m 2 . Moreover, the corrosion rate of FeNi@C@SiO 2 was 7.48 × 10 −11 m/s, significantly lower than that of FeNi (1.29 × 10 −10 m/s). This reduction was primarily due to the intrinsic inertness and impermeability of the C@SiO 2 layer, effectively isolating the corrosive medium from the substrate. This investigation presents a novel point of reference for the advancement of bifunctional MA materials intended to cope with extreme environments.
研究领域:
材料科学
·
纳米复合材料
·
表面工程
·
电磁功能材料
·
腐蚀防护
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Ying Yang,Pengfei Yi,Conghua Zhou,Jiarui Cui,Xiaolu Zheng,Si Xiao,Xueyi Guo,Wenyong Wang
In this work we investigate novel, agarose-based polymer electrolyte that is modified by magnetic NiO nanoparticles for solid-state dye-sensitized solar cells (DSSCs) applications. After proper treatment under an external magnetic field , the agarose electrolyte exhibits increased ionic conductivity and better penetration into the mesoporous TiO 2 photoanode film, which improves the power conversion efficiency of the DSSCs. Electrochemical impedance spectroscopy measurement is also performed to analyze the magnetic field effect on cell performance. After applying proper magnetic filed intensity, the recombination resistance and redox transport resistance in the devices are improved. This method can be possibly applied to other solid-state electrolyte materials to improve their performance and can lead to more efficient DSSCs.
研究领域:
材料科学
·
能源化学
·
纳米科技
·
光电功能材料
·
可再生能源
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）