Polymer Chemistry
·
2022
·Vol. 14
·期 3
·330-342
·
IF 5.364
Shuang Liu,Jing Yan,Junqin Shi,Xuezhuang Li,Junping Zhang,Xuanyi Wang,Ningjing Cai,Quanhai Fang,Qiuyu Zhang,Yi Yan
A series of cobaltocenium-containing polythioether type metallo-polyelectrolytes with different linkages and substituents were synthesized by photo-induced thiol–ene polymerization and subsequent click chemistry, and investigated as HCl corrosion inhibitors for mild steel. Given the similar structures of the polymer precursors and quantitative modification of the click reaction, the structure–property relationship of these polymeric corrosion inhibitors was systematically investigated. According to a weight loss experiment and electrochemistry study (potentiodynamic polarization and electrochemical impedance spectroscopy), it was found that these metallo-polyelectrolytes were potentially robust inhibitors, which could achieve inhibitive efficiency as high as 95% at a concentration as low as 10 mg L−1. More importantly, the mechanism of these inhibitors was explored by contact angle, X-ray photoelectron spectrum and molecular dynamics simulation, revealing the important role of the flexible linkage between the main-chain and charged groups, the number of charged groups, and the presence of coordination atoms in the main chain for the design of robust polyelectrolyte-type inhibitors. The current work may provide an effective method for the rational design and preparation of robust polyelectrolyte-type inhibitors, and guidance to investigate the structure–property relationship.
研究领域:
材料化学
·
腐蚀科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Surface Topography-Metrology and Properties
·
2017
·Vol. 5
·期 4
·044001
·
IF 0
Xiangyu Li,Yuwei Ye,Tong Liu,Wenru Zheng,Feng Yang,Haichao Zhao,Liping Wang
Novel quaternary ammonium cation containing tetraaniline (QATA) was successfully synthesized by condensation of amine-capped tetraaniline with 6-bromohexanoic acid, followed by quaternarization with triethylamine. The corrosion inhibition performance of QATA with their adsorption mechanisms for Q235 steel was studied in 1 M HCl solution by a series of methods such as weight loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and atomic force microscopy (AFM). The inhibition efficiency (IE%) increased with increasing concentrations of QATA, reaching a value up to 97.47% at a concentration of 150 mg l−1. Potentiodynamic polarization curves showed that the QATA affected both cathodic and anodic protection and was a mixed type inhibitor in 1 M HCl corrosive medium. Adsorption isotherm studies confirmed that the absorption of QATA on the Q235 steel surface in 1 M HCl solution obeyed Langmuir adsorption isotherm, and the adsorption process of corrosion inhibition on Q235 steel surface involved both the physical and chemical adsorption. The EDS analysis determined the adsorption of QATA molecules on the steel surface, the surface morphologies before and after immersion in 1 M HCl medium were also investigated by SEM and AFM.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
✓ 已验证
产品关联
DOI
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Jing Yan,Xuezhuang Li,Xue Zhang,Shuang Liu,Fenglin Zhong,Junping Zhang,Qiuyu Zhang,Yi Yan
Polyelectrolytes are commonly used as functional inhibitors and inhibitive coatings to protect metal from corrosion in the acidic condition. To achieve better inhibitive efficiency, both water solubility and supramolecular aggregated state of inhibitor on the metal surface should be considered in the design of robust inhibitors. Herein, a series of metallo-polyelectrolytes with cobaltocenium as the ionizable group and polyurethane as the backbone are designed and synthesized. The synthesized cobaltocenium-containing polyurethanes can be converted to waterborne polyurethane through a simple counterion exchange process. With regard to the multiple interaction between the synthesized metallo-polyelectrolytes and the metal surface as well as the inter/intramolecular hydrogen bonds between urethane groups, these cobaltocenium-containing waterborne polyurethanes display excellent anticorrosion performance. The polyurethane prepared from hexamethylene diisocyanate displays inhibitive efficiency as high as 98% at a concentration as low as 20 mg/mL toward mild steel in 4 M HCl.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2023
·
IF 4.5
Jun-lian WANG,Lu LIU,Guo-dong XU,Pei-long WANG,Guo-yong HUANG,Feng-shan YU
To seek more efficient extractant for Pd recovery from leaching solution of spent automotive catalysts, a new compound N-methyl-N-isopropyl octanthioamide (TA-813) was synthesized and characterized through FT-IR, 1 H NMR, ESI-MS and elemental analysis. Its extraction and stripping behaviors for Pd were studied. To evaluate its reusability performance, extraction−stripping cycles were carried out. Finally, TA-813 was applied to separating Pd from simulated leaching solution of spent automotive catalysts. TA-813 shows fast extraction kinetics, high extraction efficiency and specific selectivity for Pd. During extraction two TA-813 molecules coordinate with one Pd. The loaded Pd in the organic phase is efficiently stripped by neutral and acidic thiourea solutions. TA-813 shows no loss in activity after eight extraction−stripping cycles. Even from simulated leaching solution of spent automotive catalysts, in which the concentrations of some purities (La, Ce, Mg, Al) are much higher than that of Pd, Pd is still selectively extracted.
研究领域:
化学
·
材料科学
·
环境工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Juantao Zhang,Minjian Kong,Jiangtao Feng,Chengxian Yin,Danping Li,Lei Fan,Qibin Chen,Honglai Liu
A new type of the dimeric imidazolium-type amphiphile, BDBC m IB (m = 1, 4 and 8), was synthesized using the bipyridiyl as the spacer, and its inhibition performance and mechanism for the corrosion of N80 carbon steel in 1.0 mol·L −1 HCl were evaluated using chemical and electrochemical measurements, surface analyses and density functional theory (DFT) calculations. Results show that the inhibition efficiency of BDBC m IBs increases with their concentrations and the length of tail chains. BDBC 8 IB exhibits the best inhibition performance among them and its inhibition efficiency almost exceeds 90% in a wide concentration range from 1.0 × 10 −6 to 5.0 × 10 −4 mol·L −1 mol·L −1 at 25.0 °C, which attains the maximum over 95% at 5.0 × 10 −4 mol·L −1 . Moreover, three BDBC m IBs all display the high inhibition efficiency at 5.0 × 10 −4 mol·L −1 , nearly exceeding 90%, in the temperature range from 25.0 to 55.0 °C. As a mixed-type inhibitor, BDBC m IBs can retard both cathodic hydrogen evolution and anodic metal dissolution processes, since BDBC m IB molecules bear the imidazolium-based heterocycle with the electron-donating ability and the bipyridine with the electron-accepting ability, thereby facilitating the formation of a protective film on the surface of N80 carbon steel via electrostatic interactions, coordinated and back-donating bonds. The adsorption of BDBC m IBs obeys the Langmuir isothermal model. Our finding demonstrates that the introduction of the bipyridiyl at the spacer does favor improving the inhibition efficiency of such dimeric imidazolium-type amphiphiles, and meanwhile, the proper increase in the number of carbon atoms in the substituents on the imidazole rings can also enhance the inhibition efficiency.
研究领域:
材料科学
·
电化学
·
理论化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Zhe Yang,Chao Shan,Yuchen Mei,Zhao Jiang,Xiaohong Guan,Bingcai Pan
This study demonstrates a simple method to prepare zero valent iron (ZVI)-based agent (prtZVI) with outstanding reducing power via pretreating ZVI with H 2 O 2 /HCl. Characterization of the prtZVI system with 57 Fe Mössbauer spectroscopy, XRD, TEM and chemical analysis indicates that it is a well dispersed system, containing nanosized solids such as ZVI, magnetite, Fe II -associated iron oxides/(oxy)hydroxides, as well as soluble species like Fe 2+ and Cl − . Highly effective reduction of nitrate (20 mg N/L initially) by prtZVI could be realized in a broad pH range (4–10), short reaction time, and at low solid dosage, which is much superior to ZVIs pretreated by H 2 O 2 , HCl, or NaCl alone and the traditional ZVI systems as well. Long-term storage of the prtZVI system (30 d) did not pose any negative effect on the nitrate reduction. 15 N isotopic analysis reveals that NH 4 + is the major aqueous product (>95%) and N 2 is the only gaseous one. Considering the outstanding reduction efficiency, simple synthesis, and long-term stability, the prtZVI system could serve as a promising ZVI technology for reductive removal of contaminants of concern.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 2
·1985-2000
·
IF 1.5
Zhe Zhang,Le Ruan,Weipeng Zhang,Yuzeng Lyu,Wei Shang,Yuqing Wen,Xiuying Li,Ling Wu,Yanni Jiao
The triazol-3-ylamine and three different kinds of Schiff base compounds are self-assembled on bronze surface. Electrochemical impedance spectroscopy and potentiodynamic polarization measurements show that the triazol-3-ylamine and Schiff base self-assembled films can protect bronze from corrosion in 0.5 M HCl solution. The corrosion efficiency increases with the self-assembly time increasing and reaches a stable value after 8 h. The highest corrosion efficiency of the bronze electrode modified with self-assembled films reaches 95.81% after immersing in 0.005 M 2,4-Dibromo-6-[(4H-[1,2,4]Triazol-3-ylimino)-methyl]-phenol Schiff base solution for 10 h. X-ray photoelectron spectroscopy and scanning electrochemical microscope are used to characterize the inhibitive ability of the self-assembled films. Quantum chemical calculations and dynamic simulations indicate that the triazol-3-ylamine and Schiff bases molecules can absorb on the copper surface via chemisorption. The adsorption energy increases with the number of aromatic rings.
研究领域:
材料腐蚀与防护
·
物理化学
·
表面科学
·
电化学
·
计算化学
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2016
·
IF 5.154
Zhiyong Hu,Yanbin Meng,Xuemei Ma,Hailin Zhu,Jun Li,Chao Li,Duanlin Cao
Two benzothiazole derivatives, namely 2 - ( n -hexylamino)-4-(3′- N,N -dimethylamino-propyl)amino-6-(benzothiazol-2-yl)thio-1,3,5- s -triazine (BTC 6 T) and 2-( n -octylamino)-4-(3′- N,N -dimethylamino-propyl)amino-6-(benzothiazol-2-yl)thio-1,3,5- s -triazine (BTC 8 T), were synthesized to study their corrosion inhibiting effect against steel in a 1 M HCl solution. The corrosion inhibition efficiency was measured using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization , and weight loss methods. Both inhibitors offered extra stability and higher inhibition efficiencies again steel corrosion than previously reported benzothiazole family inhibitors. These inhibitors can be adsorbed onto surfaces by both physical and chemical means. Finally, quantum chemical parameters were calculated using the density functional theory method (DFT) and the correlation between the theoretical and experimental results are discussed.
研究领域:
腐蚀科学
·
材料化学
·
电化学
·
理论化学
·
表面科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANIMAL SCIENCE
·
2020
·Vol. 98
·期 10
·
IF 2.092
Sun Mingfa,Zhao Jingpeng,Wang Xiaojuan,Jiao Hongchao,Lin Hai
The supplementation of dietary limiting amino acids (AA) with crystalline AA makes the use of low-protein diets an option in poultry production. The differing absorption rates of crystalline and protein-bound AA may lead to temporally imbalanced AA in the postabsorptive period. In this study, two experiments were conducted to evaluate the effect of encapsulated L-lysine-HCl (L-Lys-HCl) and DL-methionine (DL-Met) on the laying performance of hens. In exp. 1, a total of 135 forty-seven-wk-old Hy-Line Brown hens were subjected to three dietary treatments for 8 wk: basal diet supplemented with 0.14% L-Lys-HCl and 0.17% DL-Met to satisfy the NRC (1994) total Lys and Met recommendation (control) and basal diet supplemented with encapsulated L-Lys-HCl and DL-Met at the levels of 60% (60CLM, 0.084% L-Lys-HCl and 0.102% DL-Met) or 80% of control (80CLM, 0.112% L-Lys-HCl and 0.136% DL-Met), respectively. In exp. 2, 24 fifty-five-wk-old Hy-Line Brown hens were individually reared in cages and subjected to the same treatments as in exp. 1. The plasma concentrations of free AA and nitrogen metabolites were measured 2, 4, and 6 h after fed. The results showed that dietary AA treatment had no significant influence on body weight (BW), feed intake, laying rate, egg weight, egg mass, or feed efficiency. The expression levels of AA transporters CAT-1, y+LAT1, b0,+AT, B0AT, rBAT, EAAT3, and PepT1 in the duodenum, jejunum, and ileum were not influenced (P > 0.05) by dietary treatment. There was an interaction of dietary AA treatment and time (P < 0.05) and the 80CLM hens exhibited higher concentrations of Lys (P < 0.05) than the controls at 2-h time point. In contrast, plasma Met concentration was not influenced (P > 0.05), while Cys was reduced in the 60CLM hens at every time point. The 80CLM hens had higher taurine concentrations than those receiving the control diet at every postprandial time point. In conclusion, these findings demonstrate that by using encapsulated form, the supplemental levels of synthetic L-Lys-HCl and DL-Met can be effectively reduced by approximately 20% with no negative effect on laying performance. The result suggests that encapsulated Lys and Met may ameliorate the postabsorptive AA balance and contribute to the reduced dietary AA supplemental levels.
研究领域:
动物营养学
·
家禽科学
·
氨基酸代谢
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Y.W. Liu,Y. Chen,X.H. Chen,Z.N. Yang,Y. Xie,Z. Zhang
The inhibition effect of ketoconazole (KCZ) on Q235 mild steel corrosion in 1.0 M HCl solution was studied using weight loss, electrochemical impedance spectroscopy (EIS), electrochemical noise (EN), scanning electron microscope (SEM) and energy dispersive X-ray detector (EDX). Results reveal that the inhibition efficiency increases with increasing the KCZ inhibitor concentration and the adsorption behavior of ketoconazole onto Q235 mild steel follows the Langmuir adsorption isotherm with negative value of Δ G a d s 0 , suggesting a spontaneous adsorption process . It is also found that the type of adsorption of KCZ on the mild steel surface belongs to chemisorption . New parameter of corrosion active energy C AE proposed from EN measurements which representing the electrode reaction speed exhibited the same variation trend with the corrosion rate.
研究领域:
材料科学
·
电化学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·
IF 2.9
Chenxu Wang,Erlong Yang
In the process of oil and gas exploration, the corrosion of carbon steel pipes results in substantial economic losses, numerous casualties, environmental contamination, and resource waste. The advancement of highly efficient and stable corrosion inhibitors holds significant importance for protecting carbon steel from corrosion during oil and gas exploitation. In this study, two new cationic Gemini surfactants (2CncoesT, where n = 12, 14) were synthesized through a straightforward two-step reaction. Weight-loss tests demonstrated that the inhibition efficiency (ηw%) increases with the increase in temperature. Specifically, the maximum ηw% values for 2C12coesT and 2C14coesT were 98.0% and 98.3% respectively at 85 °C. The adsorption of these surfactants conformed to the Langmuir adsorption isotherm. Electrochemical measurements suggested that the two surfactants functioned as mixed-type inhibitors. The findings obtained from scanning electron microscopy (SEM) were consistent with the experimental outcomes that 2C12coesT and 2C14coesT are efficient corrosion inhibitors for the metal in an acidic environment. The quantum chemical investigation and molecular dynamics simulation (MD) further substantiated the experimental results and offered insights for a deeper comprehension of the inhibition mechanism of Gemini surfactants.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Wenhui Chen,Tianxin Kang,Fenqi Du,Peipei Han,Meiling Gao,Peng Hu,Feng Teng,Haibo Fan
One-dimensional shaped ZnGa 2 O 4 , ZnO and ZnGa 2 O 4 /ZnO nanofibers were successfully prepared by electrostatic spinning technique and the photocatalytic degradation performance of tetracycline hydrochloride (TC-HCl) were studied. It was found that the S-scheme heterojunction formed in the ZnGa 2 O 4 /ZnO could greatly reduce the recombination of the photogenerated carriers and therefore improve the photocatalytic performance. By optimizing the ratio of the ZnGa 2 O 4 and ZnO, the largest degradation rate could reach 0.0573 min −1 , which was 20 times of the self-degradation rate of TC-HCl. It was verified that the h + played the key role in the reactive groups for the high performance decomposition of TC-HCl by capture experiments. This work provides a new method for the highly efficient photocatalytic degradation of TC-HCl.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）