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Ion-triggered calcium hydroxide microcapsules for enhanced corrosion resistance of steel bars

机译:离子触发氢氧化物微胶囊,用于增强钢筋的耐腐蚀性

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摘要

Herein, we synthesized Ca(OH)(2) microcapsules with ion-responsive shells composed of cross-linked poly-ionic liquids (CPILs). By exchanging PF6- with Cl- in water, the hydrophobic poly-ionic liquids (PILs) on the shell are converted to hydrophilic channels. The encapsulated Ca(OH)(2) can permeate through the hydrophilic channels and release OH-. Meanwhile, the Cl- content can be reduced. The release rate of Ca(OH)(2) is influenced by the content of monomers and concentration of Cl- ions in water. SO42- can also trigger the release of Ca(OH)(2) from the microcapsule. With these microcapsules, Q235 steel exhibited promising corrosion resistance in simulated seawater. These results indicate that encapsulation of corrosion inhibitors is highly desirable for enhanced corrosion resistance of steel bars and the proposed approach can be used to encapsulate various corrosion inhibitors and functional materials for a wide range of applications.
机译:在此,我们用由交联聚离子液体(CPIL)组成的离子响应壳合成Ca(OH)(2)微胶囊。 通过将PF6与水交换,壳体上的疏水聚离子液体(Pils)转化为亲水通道。 包封的Ca(OH)(2)可以通过亲水通道渗透并释放OH-。 同时,可以减少CL-内容。 Ca(OH)(2)的释放速率受到水中单体含量和水中浓度的影响。 SO42-也可以从微胶囊中触发Ca(OH)(2)的释放。 利用这些微胶囊,Q235钢在模拟海水中表现出有希望的耐腐蚀性。 这些结果表明,用于增强钢筋的耐腐蚀性的腐蚀抑制剂的封装,并且该方法可用于包封各种腐蚀抑制剂和各种应用的功能材料。

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  • 来源
    《RSC Advances》 |2018年第69期|共9页
  • 作者单位

    Shenzhen Univ Guangdong Prov Key Lab Durabil Marine Civil Engn Sch Civil Engn Shenzhen 518060 Peoples R China;

    Chinese Acad Sci Inst Chem State Key Lab Polymer Phys &

    Chem Beijing 100190 Peoples R China;

    Shenzhen Univ Guangdong Prov Key Lab Durabil Marine Civil Engn Sch Civil Engn Shenzhen 518060 Peoples R China;

    Chinese Acad Sci Inst Chem State Key Lab Polymer Phys &

    Chem Beijing 100190 Peoples R China;

    Shenzhen Univ Guangdong Prov Key Lab Durabil Marine Civil Engn Sch Civil Engn Shenzhen 518060 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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