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Fabrication of ethylcellulose/technical alkaline lignin composite film with high anticorrosion performance in NaCl, HCl, and KOH solutions

文献类型： 外文期刊

作者： Li, De-qiang 1 ; Li, Hai-Chao 1 ; Luo, Chao-bing 3 ; Chen, Sheng 1 ; Li, Xin 1 ; Xu, Feng 1 ;

作者机构： 1.Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China

2.Xinjiang Agr Univ, Coll Chem & Chem Engn, Urumqi 830052, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Hort Crops, Urumqi 830052, Peoples R China

关键词： Ethylcellulose; Lignin; Composite film; Anti-corrosion coating; Mechanical property

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）

ISSN： 0141-8130

年卷期： 2025 年 291 卷

页码：

收录情况： SCI

摘要： Technical alkaline lignin (TAL)-based composite films have been developed for anti-corrosion applications, during which one-component solvents, including acetone and ethanol, were employed. The poor solubility of TAL in the abovementioned solvents undoubtedly resulted in inhomogeneous surface micromorphology and the consequent unstable performance. The present study provides a series of ethylcellulose/TAL (EC/TAL) composite films with uniform surface microstructure by using the 1,4-dioxane/water binary solvent. EC/TAL film presents an excellent tensile stress of 26.4 MPa with an elongation at break of 26.8 %, which is better than those of EC film (18.4 MPa and 13.3 %). The addition of TAL significantly improves the thermostability of the composite films. The lignin component also contributes to the corrosion inhibition performances. In the 1 mol/L HCl electrolyte, the corrosion inhibition efficiency achieves 98.8 %, and these performances are all higher than 90 % in 3.5 wt% NaCl and 0.1 mol/L KOH solutions. All these results manifest that the 1,4-dioxane/water binary solvent can be used to form TAL-containing films. The performances of as-prepared films indicate their excellent potential as an anti-corrosion coating.

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