JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2021
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IF 8.067
Ting Hu,Yuejun Ouyang,Zhi-Hui Xie,Liang Wu
Current corrosion-resistant layered double hydroxide (LDH) coating on Mg alloy is usually in situ grown in autoclave by hydrothermal methods under high temperature and high-pressure conditions, which is unfavorable for industrial application. We report that an inhibitor (2-mercaptobenzothiazole, MBT) incorporated composite (MgAl-LDH/MBT) coating can be in situ deposited on bare AZ31 Mg alloy surface with the assistance of a chelating agent (ethylenediaminetetraacetic acid) under a relatively low temperature (95 °C) and ambient pressure by a one-pot method. The successful formation of LDH/MBT composite coating is confirmed by a series of characterizations, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and energy dispersive spectroscopy (EDS). The corrosion resistance of the composite coating is evaluated by means of hydrogen evolution measurement, electrochemical impedance spectroscopy (EIS), Tafel polarization curves, and neutral salt spray test. The tests show that the LDH/MBT composite coating has a very low corrosion current density (1.73 10 −8 A cm −2 ), an extremely high charge transfer resistance (2.336 MΩ cm 2 ), and does not show any corrosion pits even after 15 d of exposure to a NaCl solution or 7 d of exposure to salt fog environment, manifesting the good and robust corrosion protection. Lastly, the deposition and corrosion protection mechanisms of the MgAl-LDH/MBT composite coating are also discussed and proposed based on the EDS characterization of the coating after long-time exposure.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Jie Wu,Siyi Li,Bingqiao Yang,Hui Shao,Shaoxian Song,Feifei Jia,Mildred Quintana
Improving the flotation efficiency of molybdenite fines is a challenging job worldwide. In this work, sodium 2-Mercaptobenzothiazole (MBT) was explored as a potential collector to recover molybdenite fines efficiently. The flotation behaviors were estimated by micro-flotation tests. The interaction mechanism was probed by contact angle, Scanning Electron Microscope and Energy Dispersive Spectrometer (SEM-EDS), Zeta potential, X-ray Photoelectron Spectroscopy (XPS), adsorption capacity and density functional theory (DFT) calculation. The flotation tests revealed that MBT effectively improved the floatability of molybdenite fines at pH of 2 – 12, which exhibited stronger collecting ability than kerosene in the flotation of molybdenite fines. Contact angle, Zeta potential and adsorption capacity results revealed MBT enhanced the hydrophobicity of molybdenite surfaces, thus improving the flotation of molybdenite. SEM-EDS and adsorption energy results suggested MBT was more favorable to adsorb on edges (-268.87 kJ/mol) than that on faces (-40.09 kJ/mol). XPS and DFT calculation further demonstrated that N 2p and S 3p orbitals within MBT complexed with Mo 4d orbitals of two Mo atoms on edges to form a bidentate model. MBT had a good prospect of substituting kerosene in the flotation of molybdenite fines.
研究领域:
矿物加工
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2010
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IF 2.6
Chunyuan Song,Zhuyuan Wang,Jing Yang,Ruohu Zhang,Yiping Cui
A detailed method for preparation of 2-mercaptobenzothiazole (MBT)-labeled immuno-Au aggregates as a novel Raman probe for SERS-based immunoassay has been proposed in this paper. The formation kinetics of gold aggregates induced by MBT and the impact of the amount of labeled reporter on the aggregation, as well as the fabrication of MBT-labeled immuno-Au aggregates were characterized comprehensively by UV–vis spectrophotometer . Meanwhile, a chain-like morphology of aggregates was monitored by TEM images. Experimental results show that this Raman tag can act as an efficient label and an enhanced Raman signal of SERS-based immunoassay can be obtained successfully with this novel probe. This work shows the method for the preparation of immune probe for SERS-based immunoassay using MBT as reporter and provides a reference for the preparation of immune probe with other Raman markers for multi-channel SERS-based immunoassay.
研究领域:
分析化学
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纳米技术
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生物传感器
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免疫分析
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Xiaoqiang Li,Xin Zhang,Xiaorui Zhang,Hao Lu,Jian Wang,Siyuan He,Xiaoxiao Duan,Yongsheng Ren
2-Mercaptobenzothiazole (MBT), a widely utilized metal corrosion inhibitor in industrial production processes, has become a typical persistent organic pollutant (POP) in the circulating water of coal chemical pipelines. In this study, Fe/Mn bimetallic MOF materials supported on carbon fiber paper (PC) were employed for the first time as an electro-Fenton cathode (Fe/Mn@MPC) in a heterogeneous electro-Fenton system, achieving efficient degradation of MBT. Specifically, this novel cathode enabled 96.35 % removal of MBT within 2 h. The uniformly rough fiber morphology presented by the Fe/Mn@MPC cathode results in an increased electrochemically active surface area and reduced resistance. Remarkably, it maintains a very stable catalytic activity over a wide pH range (3–11) and after 10 h of continuous operation, which confirms that the bimetallic synergistic effect enhances the stability of the system. EPR and quenching experiments identified hydroxyl radicals as the primary active species. Based on HPLC-MS results, MBT degradation pathways involving sulfur oxidation intermediate cleavage and benzothiazole ring detachment were proposed. This work presents a promising cathode design for the treatment of thiol-containing wastewater and offers new insights into the efficient remediation of coal chemical wastewater.
研究领域:
环境科学
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材料科学
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电化学
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水处理
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污染控制
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2021
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IF 5.161
Chunling Li,Xiyu Zhao,Cheng Meng,Tengfang Zhang,Shuangqing Sun,Songqing Hu
The stimuli-responsive release could reduce the waste of the corrosion inhibitor and realize the accurate repair of corroded region. In this work, hollow mesoporous organosilica nanoparticles (HMON) were first synthesized by silica-etching chemistry tailoring method. Then, HMON were encapsulated with 2-mercaptobenzothiazole (MBT) corrosion inhibitor molecules to build an intelligent corrosion inhibitor system, i.e., MBT@HMON. The microstructure and frame composition of the synthesized HMON were characterized. After the successful encapsulation of MBT into HMON, the release kinetics of MBT from HMON under different dithiothreitol (DTT) concentration and pH conditions were investigated. Finally, the corrosion inhibition performance of MBT@HMON for copper alloy was evaluated in 3.5 wt% NaCl solution by weight loss test and electrochemical impedance spectroscopy (EIS). The results show that the controlled release of corrosion inhibitor MBT from HMON could be realized by tuning the redox and pH conditions of corrosion medium. When the appropriate concentration of MBT@HMON was added into the corrosion medium (1.6 g·L −1 in this work), the corrosion of cooper alloy was greatly inhibited. This simple and general strategy of introducing corrosion inhibitors loaded HMON directly into the corrosion medium offers a new prospect for the application of nanocontainers in the intelligent corrosion protection of metallic materials.
研究领域:
材料科学
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腐蚀科学
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纳米技术
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化学工程
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
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2024
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IF 6.1
Qian Ye,Xin Chen,Xiaozhi Zhang,Xinnan Wang,Yuhong Cui,Shujuan Liu,Feng Zhou
Herein, the anti-corrosive polymer brush functionalized MXene (P-MBTS 2 MA@MXene) was successfully prepared via surface-initiated polymerization. First, the dopamine initiator (DA-Br) can self-assemble onto MXene nanosheets formation of initiator modified MXene (PDA-Br@MXene) via spontaneous oxidative polymerization, then the corrosion inhibitor MBT derivative MBTS 2 MA monomer was grafted onto MXene nanosheets through surface-initiated atom transfer radical polymerization (SI-ATRP) to obtain polymer brush P-MBTS 2 MA functionalized MXene (P-MBTS 2 MA@MXene). The prepared P-MBTS 2 MA@MXene served as lubricant additive, manifesting good tribological properties with a low COF of 0.098 % and 94.8 % wear-reduction, which is attributed to the shielding effect and protective film formed by P-MBTS 2 MA@MXene. Additionally, the grafting P-MBTS 2 MA endows MXene nanosheets with improved anti-corrosion property, which prevents further corrosion of the metal surface via releasing corrosion resistance molecule MBT.
研究领域:
材料科学
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化学工程
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纳米技术
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2020
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IF 6.215
Jiahao Dong,Weihao Pan,Jing Luo,Ren Liu
In this work, a novel type of two-shell structured inhibitor-loaded polyaniline (PANI) microcapsule was fabricated for efficient corrosion protection of carbon steel. In our strategy, modified SiO 2 nanoparticles were used to stabilize an oil phase containing aniline, photo-crosslinkable monomer and crosslinker. Upon UV irradiation, the monomer and crosslinker underwent polymerization and converted into the first shell of microcapsules, which endows sufficient stability and robustness to the microcapsules. The subsequent polymerization of aniline at the oil/water interface contributed to the second layer of the microcapsules shell, which functioned as anticorrosion filler and pH-sensitive gatekeeper of the microcapsules to realize the responsive release of the incorporated inhibitor simultaneously. Corrosion inhibitor (2-mercaptobenzothiazole, MBT) was encapsulated into the prepared polyaniline microcapsules and pH-responsive release of MBT from the microcapsule was demonstrated. The anti-corrosion performance of the epoxy embedded with MBT loaded polyaniline microcapsules was achieved by the combination of the passivation of the steel surface by PANI and the on-demand release of MBT during the corrosion process, thus affording dual corrosion protection for the mild steel. The results showed that MBT loaded polyaniline microcapsules exhibited significantly enhanced corrosion protection of carbon steel than unloaded polyaniline microcapsules as well as MBT, demonstrating a synergistic inhibition effect of MBT and PANI.
研究领域:
材料科学
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腐蚀工程
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Corrosion Communications
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2021
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IF 0
Miaomiao Cui,Demian I. Njoku,Bowen Li,Lihui Yang,Zuankai Wang,Baorong Hou,Ying Li
This article employed a layer-by-layer approach to modify the interfacial boundary of halloysite clay nanotubes (HNTs) using (poly (diallyldimethylammonium chloride)) (PDDA) and poly (styrene sulfonate) (PSS) polyelectrolytes to form core (inhibitor-loaded HNTs)-shell (polyelectrolytes layers (PDDA/PSS)) structured smart microcapsules or micro-containers. Responses of the smart microcapsules to changes in pH (H + ), Cl − , OH − and H 2 O during the release of the loaded inhibitor (2-mecaptobenzothiazole inhibitor (2-MBT)) coupled with the number of PDDA/PSS polyelectrolytes layers ( n ) required to obtain optimal response were characterized. The anticorrosion efficacies of several organic compounds were screened to identify the most suitable inhibitor for the protection of Al alloy 2024 in 3.5 wt.% NaCl. 2-MBT which exhibits the best inhibition efficiency was successfully loaded into the HNTs lumen as demonstrated by TGA and DSC results. The release profiles of 2-MBT reveal that the sensitivity of the smart microcapsules to the various external stimuli decreased in the following order: pH > Cl − > H 2 O > OH − ; and three-layered polyelectrolyte (3n) displays the highest sensitivity amongst the studied layer numbers (n). The release profiles were fitted to the Pappas and Weibull's models which describe the release mechanisms. Compatibility of the smart microcapsules with epoxy coating coupled with the anticorrosion effect on Al alloy 2024 substrate were evaluated by means of long-term salt spray and immersion tests.
研究领域:
材料科学
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腐蚀工程
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纳米技术
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表面工程
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涂层技术
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化学工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）