School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China; Joint Institute of Guangzhou University & Institute of Corrosion Science and Technology, Guangzhou University, Guangzhou 510006, China.
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China.
Int J Biol Macromol. 2023 Jun 1;239:124358. doi: 10.1016/j.ijbiomac.2023.124358. Epub 2023 Apr 5.
The Fructus cannabis protein extract powder (FP), was firstly used as a green and high effective corrosion inhibitor through a simple water-extraction method. The composition and surface property of FP were characterized by FTIR, LC/MS, UV, XPS, water contact angle and AFM force-curve measurements. Results indicate that FP contains multiply functional groups, such as NH, CO, CN, CO, etc. The adsorption of FP on the carbon steel surface makes it higher hydrophobicity and adhesion force. The corrosion inhibition performance of FP was researched by electrochemical impedance, polarization curve and differential capacitance curve. Moreover, the inhibitive stability of FP, and the effects of temperature and chloride ion on its inhibition property were also investigated. The above results indicate that the FP exhibits excellent corrosion inhibition efficiency (~98 %), and possesses certain long-term inhibitive stability with inhibition efficiency higher than 90 % after 240 h immersion in 1 M HCl solution. The high temperature brings about the FP desorption on the carbon steel surface, while high concentration of chloride ion facilitates the FP adsorption. The adsorption mechanism of FP follows the Langmuir isotherm adsorption. This work will provide an insight for protein as a green corrosion inhibitor.
首次通过简单的水提法将大麻果实蛋白提取物粉末（FP）用作绿色高效缓蚀剂。通过傅里叶变换红外光谱（FTIR）、液质联用（LC/MS）、紫外可见分光光度计（UV）、X 射线光电子能谱（XPS）、水接触角和原子力显微镜（AFM）力曲线测量对 FP 的组成和表面性质进行了表征。结果表明，FP 含有多种官能团，如 NH、CO、CN、CO 等。FP 在碳钢表面的吸附使其具有更高的疏水性和附着力。通过电化学阻抗、极化曲线和微分电容曲线研究了 FP 的缓蚀性能。此外，还研究了 FP 的缓蚀稳定性以及温度和氯离子对其缓蚀性能的影响。上述结果表明，FP 表现出优异的缓蚀效率（~98%），并且在 1 M HCl 溶液中浸泡 240 h 后，具有一定的长期缓蚀稳定性，缓蚀效率高于 90%。高温导致 FP 从碳钢表面解吸，而高浓度的氯离子有利于 FP 的吸附。FP 的吸附机制遵循 Langmuir 等温吸附。这项工作将为蛋白质作为绿色缓蚀剂提供新的见解。
