将聚苯胺封装在多孔MIL-101中以实现高性能防腐蚀。

Encapsulating polyaniline within porous MIL-101 for high-performance corrosion protection.

作者信息

Ren Baohui, Li Yanqiang, Meng Dongli, Li Jingjun, Gao Shuiying, Cao Rong

机构信息

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002 Fuzhou, PR China; School of Physical Science and Technology, ShanghaiTech University, 200031 Shanghai, PR China; University of Chinese Academy of Sciences, 100049 Beijing, PR China; Fujian College, University of Chinese Academy of Sciences, 350002 Fuzhou, PR China.

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002 Fuzhou, PR China; University of Chinese Academy of Sciences, 100049 Beijing, PR China; Fujian College, University of Chinese Academy of Sciences, 350002 Fuzhou, PR China.

出版信息

J Colloid Interface Sci. 2020 Nov 1;579:842-852. doi: 10.1016/j.jcis.2020.06.127. Epub 2020 Jul 5.

DOI:10.1016/j.jcis.2020.06.127

PMID:32679381

Abstract

The metal corrosion possesses a serious threat to the safety and loss of property. The anticorrosion study on metal-organic frameworks (MOFs) remains rarely reported. Therefore, it is desirable to build MOFs-based anticorrosion coating with long-term corrosion resistance. Herein, we prepared a novel MOF-polymer anticorrosion composite PANI@MIL-101 by encapsulating polyaniline (PANI) within the pores of MIL-101 with in-situ polymerization of aniline monomer. The N adsorption-desorption and transmission electron microscopy (TEM) of PANI@MIL-101 illustrate that PANI is successfully encapsulated in the pores of MIL-101 with in-situ polymerization. PANI@MIL-101 was dispersed in epoxy resin (EP) to prepare anti-corrosive coatings. The Tafel potentiodynamic polarization measurements and electrochemical impedance spectroscopy show that PANI@MIL-101/EP coating system has superior corrosion protection with the lowest i value and the highest |Z| value compared with MIL-101/EP coating, PANI/EP coating and EP coating. A possible anticorrosion mechanism of PANI@MIL-101 was discussed. This work reveals that MOF-polymer composite materials are superb candidates for high-performance corrosion protection.

摘要

金属腐蚀对安全和财产损失构成严重威胁。关于金属有机框架（MOF）的防腐研究报道仍然很少。因此，期望构建具有长期耐腐蚀性的基于MOF的防腐涂层。在此，我们通过苯胺单体的原位聚合将聚苯胺（PANI）封装在MIL-101的孔内，制备了一种新型的MOF-聚合物防腐复合材料PANI@MIL-101。PANI@MIL-101的N吸附-脱附和透射电子显微镜（TEM）表明，通过原位聚合，PANI成功地封装在MIL-101的孔中。将PANI@MIL-101分散在环氧树脂（EP）中制备防腐涂层。塔菲尔电位动力学极化测量和电化学阻抗谱表明，与MIL-101/EP涂层、PANI/EP涂层和EP涂层相比，PANI@MIL-101/EP涂层体系具有优异的防腐性能，i值最低，|Z|值最高。讨论了PANI@MIL-101可能的防腐机理。这项工作表明，MOF-聚合物复合材料是高性能防腐的极佳候选材料。