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Zhang S, Liu Y, Lv S, Cheng J, Liao B, Pang P, Chen L, Deng Z, Tian Y, He L. Surface modification of low-background polymers by applying nitrogen ion implantation for electronic substrates of rare event detection. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2022.110700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Trung VQ, Hung HM, Van Khoe L, Duc LM, Bich Viet NT, Linh DK, Huong VT, Dat ND, Yen Oanh DT, Luong NX, Chinh NT, Thai H, Tuyet Lan HT, Van CL, Ţălu Ş, Trong DN. Synthesis and Characterization of Polypyrrole Film Doped with Both Molybdate and Salicylate and Its Application in the Corrosion Protection for Low Carbon Steel. ACS OMEGA 2022; 7:19842-19852. [PMID: 35721967 PMCID: PMC9202266 DOI: 10.1021/acsomega.2c01561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Polypyrrole (PPy) films doped with molybdate and salicylate have been successfully electropolymerized on low carbon steel in aqueous solutions containing both molybdate and salicylate in a one-step process that did not require any pre-treatment of the steel substrate. Salicylate-doped PPy films were synthesized in the same way for comparison. The steel surface was rapidly inhibited and the PPy-based films were formed on it easily. The PPy-based films were characterized by Fourier transform infrared, scanning electron microscopy, energy dispersive X-ray, and thermal gravimetric analysis methods. The corrosion protection performance of the coatings was investigated with electrochemical impedance spectroscopy, open circuit potential (OCP), salt spray test, and Tafel polarization. It was found that in the presence of both molybdate and salicylate as dopants, the films on steel could present a better corrosion resistance than PPy film doped with only salicylate. The self-healing property of PPy-based films was observed on the OCP measurement with the fluctuation of rest potential. The salt spray test results showed that the PPy film doped with both salicylate and molybdate was more salt-resistant than the PPy film doped with only salicylate. The results suggest that the PPy coatings doped with both molybdate and salicylate are potential for application as metallic anti-corrosion coatings.
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Affiliation(s)
- Vu Quoc Trung
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan
Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Ha Manh Hung
- Faculty
of General Education, Hanoi University of
Mining and Geology, Duc Thang Ward, BacTu Liem District, Hanoi 100000, Vietnam
| | - Le Van Khoe
- Faculty
of Natural Sciences, Hong Duc University, 565 Quang Trung, Dong Ve Ward, Thanh Hoa City 100000, Vietnam
| | - Le Minh Duc
- Branch
of National Institute of Occupational Safety and Health & Environmental
Protection in Central of Vietnam, 178 Trieu Nu Vuong, Hai Chau, Da Nang 540000, Vietnam
| | - Nguyen Thi Bich Viet
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan
Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Duong Khanh Linh
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan
Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Vu Thi Huong
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan
Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Nguyen Dang Dat
- Faculty
of Chemistry, Hanoi National University
of Education, 136 Xuan
Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Doan Thi Yen Oanh
- Publishing
House for Science and Technology, Vietnam
Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Ngo Xuan Luong
- Faculty
of Natural Sciences, Hong Duc University, 565 Quang Trung, Dong Ve Ward, Thanh Hoa City 100000, Vietnam
| | - Nguyen Thuy Chinh
- Institute
for Tropical Technology, Vietnam Academy
of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Hoang Thai
- Institute
for Tropical Technology, Vietnam Academy
of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Hoang Thi Tuyet Lan
- Faculty
of Basic Sciences, University of Transport
and Communications, No 3 Cau Giay Street, Hanoi 100000, Vietnam
| | - Cao Long Van
- Institute
of Physics, University of Zielona Góra, Prof. Szafrana 4a, Zielona Góra 65-516, Poland
| | - Ştefan Ţălu
- The
Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, 15 Constantin Daicoviciu Street, Cluj-Napoca 400020, Cluj
county, Romania
| | - Dung Nguyen Trong
- Institute
of Physics, University of Zielona Góra, Prof. Szafrana 4a, Zielona Góra 65-516, Poland
- Faculty of Physics, Hanoi National University
of Education, 136 Xuan Thuy, Cau giay, Ha Noi 100000, Vietnam
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Vu Quoc T, Do Ba D, Tran Thi Thuy D, Nguyen Ngoc L, Nguyen Thuy C, Vu Thi H, Khanh LD, Doan Thi Yen O, Thai H, Long VC, Talu S, Nguyen Trong D. DFT study on some polythiophenes containing benzo[ d]thiazole and benzo[ d]oxazole: structure and band gap. Des Monomers Polym 2021; 24:274-284. [PMID: 34512118 PMCID: PMC8425698 DOI: 10.1080/15685551.2021.1971376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 08/18/2021] [Indexed: 02/07/2023] Open
Abstract
The content of this paper focuses/shed light on the effects of X (X = S in P1 and X = O in P2) in C11H7NSX and R (R = H in P3, R = OCH3 in P4, and R = Cl in P5) in C18H9ON2S2-R on structural features and band gaps of the polythiophenes containing benzo[d]thiazole and benzo[d]oxazole by the Density Function Theory (DFT) method/calculation. The structural features including the electronic structure lattice constant (a), shape, total energy (Etot) per cell, and link length (r), are measured via band gap (Eg) prediction with the package of country density (PDOS) and total country density (DOS) of material studio software. The results obtained showed that the link angle and the link length between atoms were not changed significantly while the Etot was decreased from Etot = - 1904 eV (in P1) to Etot = - 2548 eV (in P2) when replacing O with S; and the Etot of P3 was decreased from Etot = - 3348 eV (in P3) when replacing OCH3, Cl on H of P3 corresponding to Etot = - 3575 eV (P4), - 4264 eV (P5). Similarly, when replacing O in P1 with - S to form P2, the Eg of P1 was dropped from Eg = 0.621 eV to Eg = 0.239 eV for P2. The Eg of P3, P4, and P5 is Eg = 0.006 eV, 0.064 eV, and 0.0645 eV, respectively. When a benzo[d]thiazole was added in P1 (changing into P3), the Eg was extremely strongly decreased, nearly 100 times (from Eg = 0.621 eV to Eg = 0.006 eV). The obtained results serve as a basis for future experimental work and used to fabricate smart electronic device.
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Affiliation(s)
- Trung Vu Quoc
- Faculty of Chemistry, Hanoi National University of Education, Cau Giay, Hanoi
| | - Dai Do Ba
- Nguyen Trai High School, Ba Dinh, Hanoi, Vietnam
| | | | - Linh Nguyen Ngoc
- Faculty of Training Bachelor of Practice, Thanh Do University, Kim Chung, Hoai Duc, Hanoi Vietnam
| | - Chinh Nguyen Thuy
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi, Vietnam
| | - Huong Vu Thi
- Faculty of Chemistry, Hanoi National University of Education, Cau Giay, Hanoi
| | - Linh Duong Khanh
- Faculty of Chemistry, Hanoi National University of Education, Cau Giay, Hanoi
| | - Oanh Doan Thi Yen
- Publishing House for Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi, Vietnam
| | - Hoang Thai
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi, Vietnam
| | - Van Cao Long
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
| | - Stefan Talu
- Technical University of Cluj-Napoca, The Directorate of Research, Development and Innovation Management (DMCDI), Cluj county, Romania
| | - Dung Nguyen Trong
- Institute of Physics, University of Zielona Góra, Zielona Góra, Poland
- Faculty of Physics, Hanoi National University of Education, Cau Giay, Hanoi, Vietnam
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Abstract
Friction stir alloying (FSA) of commercially pure Cu with Ni, Zn, and Mg is implemented in the current study. Mechanical and microstructural aspects of the successfully fabricated alloy structure have been examined. Energy dispersive X-ray spectroscopy revealed a uniform distribution of alloying elements and coalescence at the atomic level. The compositional and grain size heterogeneity is managed in the stir zone, allowing for microstructural control with FSA. Thus, the present study is essential for the development of novel materials whose fabrication requires temperature well below the melting point of base metals. The alloying process is found to be accompanied by ultra-refined grains, with the smallest grain size being ~0.44 μm. The fabricated alloy managed to retain the FCC phase, and no brittle intermetallic compounds formed, according to X-ray diffraction. The fabricated alloy exhibits maximum and average microhardness enhancements of 18.4% and 6%, respectively. Tensile properties have also been investigated and correlated with microstructural morphology. A shift toward grain bimodality has also been documented, which is a highly sought-after property nowadays, especially to overcome the strength-ductility trade-off.
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