DAP超分子水凝胶驱动自修复水泥基材料

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (5): 1502-1509.

DAP超分子水凝胶驱动自修复水泥基材料

陈伟¹, 李玥^1,2, 刘翔^1,2, 唐焱杰^1,2, 唐佩¹

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.武汉理工大学材料科学与工程学院,武汉 430070

收稿日期:2021-12-26 修回日期:2022-03-08 出版日期:2022-05-15 发布日期:2022-06-01
通讯作者: 唐佩,博士,研究员。E-mail:pei-tang@whut.edu.cn
作者简介:陈伟(1976—),男,博士,教授。主要从事生态建筑材料的研究。E-mail:chen.wei@whut.edu.cn
基金资助:
国家自然科学基金(51972248,52072279);湖北省自然科学基金计划(ZRMS2020001673);深圳市科技计划项目协同创新专项(CJGJZD20200617102601003);中央高校基本科研业务费专项资金资助(WUT:2021IVA102)

DAP Supramolecular Hydrogel Driven Self-Healing Cement-Based Materials

CHEN Wei¹, LI Yue^1,2, LIU Xiang^1,2, TANG Yanjie^1,2, TANG Pei¹

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Received:2021-12-26 Revised:2022-03-08 Online:2022-05-15 Published:2022-06-01

摘要/Abstract

摘要： 为了延长混凝土的使用寿命,发展了一种2,6-二[N-(羧乙基羰基)氨基]吡啶(DAP)超分子水凝胶驱动自修复水泥基材料和诱导羟基磷灰石自修复技术。DAP超分子水凝胶通过负载NH₄H₂PO₄,在碱性条件下实现修复剂的智能化响应释放。将负载修复剂的DAP超分子水凝胶和中空玻璃管复合制备自修复构件,并开展了裂缝修复和护筋性能试验。结果表明:经过28 d的修复,0.592 mm宽的裂缝表面被修复,修复产物为羟基磷灰石;加入修复构件后,能够减缓钢筋锈蚀。在裂缝处,自修复成分释放后生成的修复产物使得裂缝的底部被填堵,阻隔了有害离子和气体的入侵通道。

关键词: 水泥, 裂缝, 自修复, 羟基磷灰石, 超分子水凝胶, 钢筋锈蚀

Abstract: In order to prolong the service life of concrete, a 2,6-bis [N-(carboxyethyl carbonyl) amino] pyridine (DAP) supramolecular hydrogel driven self-healing cement-based material and hydroxyapatite self-healing technology were developed. In alkaline environment, the DAP supramolecular hydrogel loaded with NH₄H₂PO₄ can realize the releasing of repair agent intelligently. DAP supramolecular hydrogel loaded with repair agent was encapsulated in a hollow glass tube and used to prepare self-healing component, and experiments of healing crack and rebar protection were carried out. The results show that the crack surface with a width of 0.592 mm is repaired after 28 d of healing. The healing product is hydroxyapatite. The self-healing component delays the rebar corrosion. The repair agent is released at the cracks and the generated healing products fill the cracks, thus blocking the intrusion channels of hazardous ions and gas.

Key words: cement, crack, self-healing, hydroxyapatite, supramolecular hydrogel, rebar corrosion

中图分类号:

TQ172

陈伟, 李玥, 刘翔, 唐焱杰, 唐佩. DAP超分子水凝胶驱动自修复水泥基材料[J]. 硅酸盐通报, 2022, 41(5): 1502-1509.

CHEN Wei, LI Yue, LIU Xiang, TANG Yanjie, TANG Pei. DAP Supramolecular Hydrogel Driven Self-Healing Cement-Based Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1502-1509.

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