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Luo X, Zhen D, Deng Q, Guo M, Mao H, Dai H, Xie ZH, Zhong J, Liu Y. Corrosion inhibition activity of a natural polysaccharide from Dysosma versipellis using tailor-made deep eutectic solvents. Int J Biol Macromol 2024; 268:129220. [PMID: 38191116 DOI: 10.1016/j.ijbiomac.2024.129220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 12/21/2023] [Accepted: 01/02/2024] [Indexed: 01/10/2024]
Abstract
In this work, a total of 18 types of choline chloride, betaine, and L-proline-based deep eutectic solvents (DESs) were synthesized to determine the extraction yield of a natural polysaccharide (PSA) from Dysosma versipellis using an ultrasound-assisted extraction method. Results indicate that the choline-oxalic acid-based DES has the best extraction yield for PSA due to the proper physical-chemical properties between PSA and DES. To evaluate the optimal extraction conditions, a response surface methodology was carried out. Under the optimal conditions, the extraction yield of PSA reaches 10.37 % (± 0.03 %), higher than the conventional extraction methods. Findings from FT-IR and NMR suggest that the extracted PSA belongs to a neutral polysaccharide with (1 → 6)-linked α-d-glucopyranose in the main chain. Interestingly, results from various electrochemical measurements show the extracted PSA exhibits excellent corrosion inhibition performance for mild steel (MS) in a 0.5 M HCl solution, with 90.8 % of maximum corrosion inhibition efficiency at 210 mg L-1. SEM and XPS measurements reveal the formation of a protective layer on the MS surface. The adsorption behaviour of extracted PSA well obeys the Langmuir adsorption isotherm containing the chemisorption and physisorption. Additionally, theoretical calculations validate the experimental findings.
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Affiliation(s)
- Xiaohu Luo
- Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyan 558000, PR China; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Deshuai Zhen
- Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyan 558000, PR China; School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, PR China; State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Qiuhui Deng
- School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, PR China
| | - Meng Guo
- Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyan 558000, PR China
| | - Haili Mao
- School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, PR China
| | - Homg Dai
- Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyan 558000, PR China.
| | - Zhi-Hui Xie
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, PR China.
| | - Junbo Zhong
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong 637002, PR China
| | - Yali Liu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
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