pH-Responsive Self-Healing Anticorrosion Coating Based on a Lignin Microsphere Encapsulating Inhibitor,Industrial & Engineering Chemistry Research

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pH-Responsive Self-Healing Anticorrosion Coating Based on a Lignin Microsphere Encapsulating Inhibitor
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-04 , DOI: 10.1021/acs.iecr.9b05743
Zhiyou Tan _{1,

2} , Shan Wang _{1,

2} , Zhuorong Hu _{1,

2} , Weilong Chen _{1,

2} , Zhencai Qu _{1,

2} , Changan Xu _{1,

2} , Qian Zhang _{1,

2} , Kun Wu ₁ , Jun Shi ₁ , Mangeng Lu ₁

Affiliation

In this work, we offered a facile strategy to produce lignin microspheres (LMS) with loading of benzotriazole (BTA) inhibitors, which were released as the pH changed. The morphological and compositional characterizations demonstrated that the BTA inhibitors were efficiently encapsulated in the LMS whose load was up to 15.5 wt %. Tests of crossed scratches of coatings indicated that the [email protected]/pure waterborne epoxy resin (WEP) had a good self-healing property. By the electrochemical impedance spectroscopy test, the long-term anticorrosion property of [email protected]/WEP composites was 1 order of magnitude higher than that of WEP, which indicated that [email protected] greatly improved the corrosion resistance. The highly effective anticorrosion should be attributed to the pH-responsive release behavior of BTA from LMS, which actively protected the steel substrate. The enhanced anticorrosion and the controlled release of BTA enlarged the high value-added applications of lignin.

中文翻译：

基于木质素微球包封抑制剂的pH响应型自修复防腐涂料

在这项工作中，我们提供了一种简便的策略来生产载有苯并三唑（BTA）抑制剂的木质素微球（LMS），该抑制剂随pH的变化而释放。形态学和组成特征表明，BTA抑制剂被有效地包封在LMS中，其负载量高达15.5wt％。涂层的划痕试验表明，[电子邮件保护] /纯水基环氧树脂（WEP）具有良好的自修复性能。通过电化学阻抗谱测试，[电子邮件保护] / WEP复合材料的长期防腐性能比WEP高1个数量级，这表明[电子邮件保护] / WEP复合材料的耐蚀性大大提高。高效的防腐作用应归因于BMS从LMS的pH响应释放行为，积极保护钢基材。BTA的增强防腐性和受控释放扩大了木质素的高附加值应用。

更新日期：2020-02-04

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