期刊
MATERIALS
卷 12, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/ma12111776
关键词
kraft lignin; polymer; corrosion resistant; iron; acid inhibition
类别
资金
- National Key R&D Program of China [2017YFB0308000]
- National Natural Science Foundation of China [31570566, 31500489, 31800499]
- Key Research and Development Program of Shandong Province [2017GSF17130]
- Foundation of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control of China [KF201717]
A novel lignin-based quaternary ammonium material (lignin-DMC) with excellent corrosion resistant behavior was synthesized by grafting DMC (methacrylatoethyl trimethyl ammonium chloride) onto kraft lignin. The structure and anti-corrosion performance of lignin-DMC was investigated using many methods, for instance the scanning electron microscope (SEM), atomic force microscopy (AFM), charge density analysis, molecular weight analysis, electrochemical methods. Fourier-transform infrared spectroscopy (FT-IR) confirmed the formation of the lignin-DMC. The experiment results indicated that maximum corrosion inhibition efficiency (87.65%) occurred at a concentration of 75 mg/L via weight loss measurement. Polarization curves indicated that lignin-DMC was a mixed-type inhibitor with an efficient anti-corrosion performance in an acid medium. Electrochemical impedance spectroscopy (EIS) results indicated that lignin-DMC could create a shielding effectiveness and achieve a protective effectiveness in the HCl solution. Moreover, lignin-DMC displayed a physical and chemical adsorption process between 20 KJ/mol and 40 KJ/mol, which followed the Langmuir adsorption isotherm model.
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