International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chun Feng,Lijuan Zhu,Yaqiong Cao,Yin Di,Zongxue Yu,Guhui Gao
This study reports a new strategy for enhancing the anti-corrosion properties of epoxy coatings. For this purpose, beta-cyclodextrin-graphene oxide (β-CD-g-GO) nanosheets were synthesized via anchoring beta-cyclodextrin on a graphene oxide surface in the presence of 3-glycidoxypropyltrimethoxysilane (KH560). The structure of the material was characterized by SEM, EDX, XRD, FT-IR and TGA. The inclusion of 2 wt. % GO and β-CD-g-GO nanosheets in epoxy resin remarkably enhanced the corrosion protection performance of the material relative to that of pure epoxy coating. Electrochemical impedance spectroscopy (EIS) measurements revealed that the impedance of the epoxy coating was improved after the addition of 2 wt. % GO and β-CD-g-GO nanosheets. The most pronounced improvement in the properties of the epoxy coating was obtained using β-CD-g-GO nanosheets. Scratches tests confirmed the reduced steel substrate corrosion in the case of epoxy coating that included β-CD-g-GO nanosheets compared to the corrosion obtained for other samples.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xinchen Pan,Yunfan Zhang,Ying Zhang,Mingyu Yang,Zhanwei Yang,Yakun Liu,Ping Zhang,Zhiwei Han,Xin Wang,Yongsheng Fu
Nanodiamonds (NDs) prepared by the explosion method possess very large surface energies, resulting in serious agglomerates, limiting their further application. Herein, we employed the strong shearing action of hydroxyl ion (OH–) to induce the hydrolysis of esters between the ND primary particles, generating the carboxyl and hydroxyl groups, breaking hard agglomeration of NDs, and successfully constructed electrical double layers on the surface of NDs via deprotonation of surface oxygen-containing groups induced by the strong shearing action of hydroxyl ion (OH–), leading to a significant increase of zeta potential absolute value (−54.2 mV), achieving the long-term stable (200 days) monodispersion of NDs (m-NDs). The as-obtained m-NDs, as efficient nanofillers, were added into the waterborne epoxy (WEP) to produce a composite coating of m-NDs/WEP, displaying a considerable improvement in anticorrosion performance. The results of electrochemical impedance spectroscopy show that the |Z|f = 0.01 Hz of m-NDs/WEP is nearly 3 orders of magnitude higher than that of pure WEP after 168 h of immersion. The excellent anticorrosion performance of m-NDs/WEP can be ascribed to the excellent compatibility, electrical insulation property, and physical barrier behavior of m-NDs, inhibiting the infiltration of corrosive medium. The molecular dynamics simulation reveals that m-NDs have good barrier properties against a corrosive medium.
研究领域:
材料科学
·
化学工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Bingtao Bao,Jianhua Wu,Hao Liu,Mingjin Xue,Jianmin He,Hanzhong Ren,Yiting Xu,Birong Zeng,Weiang Luo,Lizong Dai
Polyaniline (PANI) is considered as one of the most promising corrosion inhibitors because of its unique redox and environmental stability. Pyridine and its derivatives can chelate metal ions during corrosion, forming an inert protective layer on the metal surface to achieve the anticorrosion effect. Therefore, polyaniline is combined with pyridine together to achieve deep anticorrosion in this work. 4-((2,2′:6′,2″-terpyridin)-4′-yl)aniline (TPY) and 1,3,5-benzenetricarbonyl chloride (TMC) were applied to synthesize a novel corrosion inhibitor N1, N3, N5-tri (4-((2,2′: 6′, 2′-tri-pyridine)-4′-yl) phenyl) benzene-1,3,5-tri-formamide (TBT). Then, TBT was in situ loaded onto the PANI surface to obtain the composite TPANI. The TPANI was successfully dispersed in epoxy resin (EP) at various dosages to prepare composite coatings. Electrochemical impedance spectroscopy and salt fog tests were employed to evaluate the performance of the coatings. After experimentation, we discovered that when the TPANI content was 0.25 wt%, the impedance value remained stable at 5.83 × 10 9 Ω cm 2 after immersing the coatings in a 3.5 wt% NaCl solution for 28 days. In contrast, the EP coating exhibited a resistance decrease ranging from 9.56 × 10 9 to 7.8 × 10 8 Ω cm 2 within the same soaking time, decreasing by an order of magnitude, while the TPANI-0.25% coating still maintaining a high order of magnitude. These results indicated that the TPANI filler effectively preserved long-term stability and provided persistent protection against corrosion. The protective mechanism of TPANI composite coatings was further elucidated through detailed analysis. Overall, the incorporation of TPANI into the epoxy resin yielded promising results, demonstrating its potential as an effective corrosion inhibitor for protective coatings.
研究领域:
材料科学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Li Guan,Weibin Yu,Muhammad Rehman Asghar,Weiqi Zhang,Huaneng Su,Chunsheng Li,Lei Xing,Qian Xu
Efficient methanol oxidation reaction is the first requirement of the electrocatalyst of a Direct methanol fuel cell (DMFC), which is determined by its catalyst material and preparation method. In this work, a novel electrocatalyst used in anode is prepared by using graphene aerogel (GA) as a supporting material with platinum and Nafion binder by spray coating. The physical and chemical properties of the electrocatalyst are examined with scanning electron microscope (SEM), Electrochemical impedance spectroscopy (EIS), and polarization curves. The SEM results show that graphene aerogel based electrocatalysts possess a three-dimensional structure with uniform dispersion of nanostructure, which enlarges the activation area of the electrocatalyst and produces more protons and electrons. Moreover, the well-developed porous structure provides a less resistance and smooth pathway for protons to reach the cathode. The results show that with 10 % GA and 50 % Nafion as binder, the current density reaches at the value of 42.62 mW·cm −2 respectively, which is 13.5 % higher than the maximum power density of 37.56 mW·cm −2 of traditional carbon-catalyst layer (C-CL) electrode. Moreover, when temperature increases from 50 to 70 ℃, the novel catalytic layer electrode (GA-CL) doped with GA as an additive delivers 95.8 % increment in power density.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Bin Chen,Jun Ma,Lin Gu,Shuan Liu,Haichao Zhao,Haibin Yu,Jianmin Chen
Electro-active maleic acid capped trianiline (MTA) was synthesized by reaction of maleic anhydride with trianiline (TA). Photopolymerization of aromatic acrylate (PAA) and MTA were applied on Q235 carbon steel to afford oligoaniline containing electroactive coatings. The anticorrosion behavior of photo-cured coatings with 1 wt% and 2.5 wt% MAT was investigated in 3.5% NaCl solution via potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). It was observed that acrylate containing MTA coatings exhibited better corrosion resistance than the pure aromatic acrylate coating did.
研究领域:
材料科学
·
腐蚀与防护
·
高分子化学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2019
·Vol. 31
·期 10
·04019237
·
IF 1.984
Yongshan Tan,Hongfa Yu,Wanli Bi,Nan Wang,Na Zhang
A new type of material, magnesium oxysulfate cement (MOSC), has attracted widespread attention as an environmentally friendly and low-energy inorganic green cementitious material due to its outstanding performance. In this study, electrochemical impedance spectroscopy (EIS) and in situ X-ray diffraction (XRD) were used to characterize the hydration behavior and process of MOSC. EIS was also used to investigate the effect of fly ash (FA) on the hydration behavior of MOSC. Mercury intrusion porosimetry (MIP), backscattered scanning electron microscopy (BSE), and scanning electron microscopy (SEM) were used to study the evolution of the pore structure and micromorphology of MOSC incorporated with FA. The results show that the resistance values (?1) in the equivalent circuit for MOSC increase with increasing curing time. The incorporation of FA can affect the resistance values for each element in the equivalent circuit. In the early stages of hydration (1 day and 2 days), high-volume FA can reduce the degree of hydration of MOSC paste. At the later stages of hydration, the resistance values (?1) increase with increasing FA content. The MIP, BSE, and SEM results also show that the porosity of MOSC decreases with increasing FA content; the incorporation of FA can significantly improve the morphology of MOSC, resulting in a denser microstructure. This study shows that the electrochemical impedance spectroscopy is a powerful technique to investigate the hydration behavior and process of MOSC, and the results also indicate that FA is a good mineral admixture used as a partial substitute for MOSC cementitious materials.
研究领域:
材料科学
·
硅酸盐工程
·
建筑材料
·
无机非金属材料
·
绿色建材
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 36
·50899
·
IF 3.125
Lingli Ni,Shanshan Li,Yongtao Liu,Xiaowu Jiang,Peng Cai,Liangdong Feng,Shizhong Zhang,Xiaoyan Gao
The development of eco-efficient and environmental friendly active anti-corrosion coatings for metallic substrates represents a fundamental milestone in many engineering applications. Herein, a new type of active corrosion protection coating was successfully synthesized simply based on waterborne polyurethane (WPU) and nanocontainer of Ce 3+ modified palygorskite (Ce-PAL). Particularly, the nanocontainer of Ce-PAL was achieved via a facile and green process by cation exchange in water. Inductively coupled plasma atomic emission spectrometry (ICP) revealed that Ce 3+ had successfully incorporated into PAL nanofibers with a loading amount of 10.334 g/kg. The salt immersion test, electrochemical potentiodynamic measurements and electrochemical impedance spectroscopy (EIS) demonstrated that the incorporation of Ce-PAL only with 2 wt% into WPU led to a significant improvement of their corrosion protection properties. Finally, according to the results of scanning electron microscopy with energy dispersive X-ray spectroscopy, the active anti-corrosion mechanism of Ce-PAL/WPU coating was proposed.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Weilu Liu,Yukai Ma,Guoxiang Sun,Shupiao Wang,Jiayin Deng,Hong Wei
A novel electrochemical biosensor was developed for ultrasensitive determination of testosterone from femtomolar to micromolar levels via electrochemical impedance spectroscopy (EIS) measurements. The sensor features a nanosized molecularly imprinted polymer (MIP) film that was electrochemically grafted on a graphene-oxide sheets modified electrode . The detection mechanism of this senor is explained via the change of the interfacial impedance that derived from the recognition of the target molecule. Due to the nanosheet structure as well as the high surface area of graphene-oxide, the sensitivity of the MIP sensor is enhanced remarkably. Under an optimized condition, a wide linear range from 1 fM to 1 µm (1×10 −15 –1×10 −6 mol L −1 ) and a detection limit of 0.4 fM (4.0×10 –16 mol L −1 ) was obtained. This composite film presented a good selectivity over structurally similar steroid hormones , and a long term stability in room temperature for the detection of testosterone. Considering these advantages, the MIP/GO electrochemical biosensor could be a substitute of testosterone immunosensor, and may be further extended to the detection of other endogenous substances.
研究领域:
生物传感技术
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Xueying Qiao,Maochao Wei,Dong Tian,Fangquan Xia,Peipei Chen,Changli Zhou
A green and facile electrochemical approach to synthesize novel cadmium/aluminum layered double hydroxides on a glassy carbon electrode (Cd/Al-LDHs/GCE) was proposed. The morphology and structure of Cd/Al-LDHs were characterized by scanning electron microscopy, energy dispersive spectrometer, powder X-ray diffraction. The results indicated that Cd/Al-LDHs were successfully prepared. Cyclic voltammetry and electrochemical impedance spectroscopy were employed to investigate the electrochemical behaviors of Cd/Al-LDHs/GCE. The Cd/Al-LDHs was served as an electrochemical probe in the detection of anthracene . And the Cd/Al-LDHs electrochemical response was greatly suppressed in presence of anthracene. A sensitive and convenient electrochemical method was developed for the determination of anthracene. The linear range and detection limit were 0.1–100.0 pM and 0.5 fM respectively. The method was successfully applied to determine anthracene in cloud-rain water samples of Mount-Taishan. This work provides a promising strategy for polycyclic aromatic hydrocarbons analysis at a very low concentration.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 4
·1727-1737
·
IF 3.442
Peng Guangchun,Qiao Qianqian,Jin Lei,Zhang Bowei,Wang Yi,Huang Kang,Yao Qiong,Zhang Dongjiu,Zhang Zhan,Fang Tao,Wu Junsheng,He Yedong
A novel CeO 2 /MgAl 2 O 4 composite coating, fabricated via a cathode plasma electrolytic deposition (CPED) technique followed by hydrothermal synthesis, was developed in this study to explore its potential application as corrosion protection for AZ31 magnesium alloys. The microstructure observed through scanning electron microscopy indicated that reducing the duty cycle of the power source within a reasonable range during the CPED process was beneficial to form a uniform and dense MgAl 2 O 4 coating, which served as an ideal adhesive matrix for a uniform CeO 2 coating as the outermost layer. The results of electrochemical impedance spectra and neutral salt spray tests showed that the decoration of the CeO 2 layer significantly improved the corrosion resistance of the CeO 2 /MgAl 2 O 4 composite coating compared to the single MgAl 2 O 4 coating and bare substrate. Cross-cut tests revealed that the adhesion of the MgAl 2 O 4 coating and the CeO 2 /MgAl 2 O 4 composite coating were both excellent due to the strong binding between the MgAl 2 O 4 coating and the substrate.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Luntao Wang,Leping Deng,Dawei Zhang,Hongchang Qian,Cuiwei Du,Xiaogang Li,Johannes M.C. Mol,Herman A. Terryn
A shape memory composite (SMC) coating with a self-healing ability was prepared by a facile method based on a thermoresponsive shape memory polymer (SMP) that utilized carnauba wax microparticles as the healing agent. Damages to the SMC coating was healed via heating, which triggered a two-step healing mechanism consisting of defect closure through a shape memory effect at 65 °C and then defect sealing by molten wax at 90 °C. The surface morphologies of the scratched and healed coatings as well as a wax-free SMP coating were first studied by optical stereomicroscopy and scanning electron microscopy (SEM). To assess the recovery of the coating’s barrier properties, macroscopic and localized information was obtained by electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM), respectively. The healing performance was also evaluated by comparing the macroscopic morphologies of the intact, damaged and healed coatings after long-term immersion. The results from both tests were in agreement and confirmed the key roles of carnauba wax microparticles in the complete recovery of the barrier properties of initially damaged coatings upon thermally assisted self-healing.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2014
·Vol. 21
·期 2
·1-7
·
IF 1.897
Zheng Tao,Ren Shitong,Zhou Qian,Li Qian,Zhang Liaoyun,Li Huayi,Lin Yuan
Hyperbranched poly(glycidol) (HPG) containing hydroxyl groups is firstly synthesized via anionic polymerization, and then reacts with thionyl chloride to form chlorine end-terminated hyperbranched poly(glycidol) (HPG-Cl). Different ionic liquid polymers are synthesized from the reaction of HPG-Cl with N-methylimidazole and then anion exchange with hexafluorophosphoric acid and sodium tetrafluoroborate. The structure and properties of the obtained ionic liquid polymers are characterized by 1 H NMR, ATR-FTIR, DSC and TGA, respectively. Ionic conductivity of the polymer electrolytes composed of ionic liquid polymer and lithium bis(trifluoromethanesulfonimide) (LITFSI) is investigated by electrochemical impedance spectroscopy. The results show that the ionic conductivity of the prepared ionic liquid polymer electrolyte can reach 3.5 × 10 −4 Scm −1 at 30 °C when the weight ratio of ionic liquid polymer ([HPG-MeIm]BF 4 ) to lithium salt (LiTFSI) is 4.5.
研究领域:
材料科学
·
电化学
✓ 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）