Corrosion inhibition activity of a natural polysaccharide from Dysosma versipellis using tailor-made deep eutectic solvents

Xiaohu Luo; Deshuai Zhen; Qiuhui Deng; Meng Guo; Haili Mao; Homg Dai; Zhi-Hui Xie; Junbo Zhong; Yali Liu

doi:10.1016/j.ijbiomac.2024.129220

Corrosion inhibition activity of a natural polysaccharide from Dysosma versipellis using tailor-made deep eutectic solvents

Int J Biol Macromol. 2024 Jan 6;268(Pt 1):129220. doi: 10.1016/j.ijbiomac.2024.129220. Online ahead of print.

Authors

Xiaohu Luo¹, Deshuai Zhen², Qiuhui Deng³, Meng Guo⁴, Haili Mao³, Homg Dai⁵, Zhi-Hui Xie⁶, Junbo Zhong⁷, Yali Liu⁸

Affiliations

¹ 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.
² 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.
³ School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, PR China.
⁴ 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.
⁵ 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. Electronic address: dahong@sgmtu.edu.cn.
⁶ Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, PR China. Electronic address: zhxie@cwnu.edu.cn.
⁷ Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong 637002, PR China.
⁸ State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China. Electronic address: yaliliu@hnu.edu.cn.

PMID: 38191116
DOI: 10.1016/j.ijbiomac.2024.129220

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.

Keywords: Corrosion inhibition; Deep eutectic solvent; Polysaccharide.