Smart waterborne composite coating with passive/active protective performances using nanocontainers based on metal organic frameworks derived layered double hydroxides

Chengliang Zhou; Hongjian Zhang; Xinyu Pan; Ji Li; Bo Chen; Wenjing Gong; Qi Yang; Xiaohu Luo; Hongbo Zeng; Yali Liu

doi:10.1016/j.jcis.2022.03.088

Smart waterborne composite coating with passive/active protective performances using nanocontainers based on metal organic frameworks derived layered double hydroxides

J Colloid Interface Sci. 2022 Aug:619:132-147. doi: 10.1016/j.jcis.2022.03.088. Epub 2022 Mar 23.

Authors

Chengliang Zhou¹, Hongjian Zhang², Xinyu Pan², Ji Li³, Bo Chen², Wenjing Gong⁴, Qi Yang⁴, Xiaohu Luo⁵, Hongbo Zeng⁶, Yali Liu⁷

Affiliations

¹ College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China; Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
² College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China.
³ College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China; SINOPEC Beijing Research institute of Chemical Industry, Beijing, 100013, PR China.
⁴ Technology Center, Zhuzhou Lince Group Co., Ltd, Zhuzhou, Hunan 412001, PR China.
⁵ College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China; Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, 558000, PR China. Electronic address: luoxiaohu4812350@163.com.
⁶ Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada. Electronic address: Hongbo.Zeng@ualberta.ca.
⁷ College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China; Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China. Electronic address: yaliliu@hnu.edu.cn.

PMID: 35381482
DOI: 10.1016/j.jcis.2022.03.088

Abstract

Functional surfaces and coatings with excellent anticorrosion performances are of great significance for numerous engineering applications. However, developing waterborne coatings with long-term anticorrosion properties remains challenging. In this study, we developed a multifunctional nanocontainer for a waterborne coating matrix, using zeolitic imidazolate framework (ZIF)-derived layered double hydroxides (LDHs) as the gatekeepers for benzotriazole (BTA)-encapsulated mesoporous silica nanoparticles (MSNs-BTA). The LDHs outer layer and the ZIF intermediate layer endowed the MSNs-BTA@ZIF-LDHs nanocontainer with excellent compatibility, dispersion, and pH-responsive controllable release properties in the waterborne coating matrix. The waterborne epoxy composite coatings showed excellent passive and active anticorrosion performances, well-characterized by electrochemical impedance spectroscopy (EIS), permeation experiments, neutral salt spray (NSS) tests, and the scanning vibrating electrode technique (SVET). This excellent corrosion protection performance can be attributed to two factors: before corrosion, the MSNs-BTA@ZIF-LDHs served as passive nanofillers against corrosive media, significantly improving the barrier properties of the composite coatings; after the occurrence of corrosion, the MSNs-BTA@ZIF-LDHs acted as pH-responsive nanocontainers and released pre-loaded BTA corrosion inhibitors, preventing further damage to the exposed metal substrate. This study provides new insights into the development of multifunctional anticorrosion surfaces and coatings for various engineering applications.

Keywords: Layered double hydroxides; Mesoporous silica nanoparticles; Nanocontainers; Waterborne coatings; Zeolitic imidazolate framework.