期刊
ACS APPLIED NANO MATERIALS
卷 5, 期 1, 页码 1408-1418出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c03953
关键词
functionalized Ti3C2Tx; carbon nanotubes; waterborne polyurethane; protective construction coatings; anticorrosion performance
资金
- Natural Science Foundation of Henan Province [212300410336]
- Program for Science and Technology Innovation Talent in Universities of Henan Province [20HASTIT016]
- Key Scientific and Technological Project of Henan Province [202102310605, 212102210215]
The silanized Ti3C2Tx/carbon nanotube (CNT) nanocomposite has been developed as a shielding layer for waterborne polyurethane (WPU) coatings to enhance their anticorrosion properties. The functionalized surfaces of Ti3C2Tx and S-CNTs form an effective shielding layer in the coating, effectively preventing the penetration of corrosive electrolytes, demonstrating improved performance after 120 days of immersion.
Two-dimensional Ti3C2Tx flakes have been studied as nanofillers in anticorrosive coatings, but their poor dispersion and interfacial interaction in coatings limit their application. In this study, we report silanized Ti3C2Tx/carbon nanotube (CNT) nanocomposite as a shielding layer for waterborne polyurethane (WPU) coatings, which makes the WPU coatings have enhanced anticorrosion properties. [3-(2-Aminoethylamino)-propyl] trimethoxysilane (AEAPTMS) is used to make the Ti3C2Tx surface electropositive, and sodium dodecylbenzene sulfonate (SDBS)-functionalized CNTs (S-CNTs) with negative charges on the surface are used to form highly dispersed composite nanofillers with Ti3C2Tx through electrostatic interaction. The functionalized surfaces of Ti3C2Tx and S-CNTs form an effective shielding layer in the coating, which effectively prevents the penetration of corrosive electrolytes. The results reveal that the AEAPTMS-functionalized Ti3C2Tx (A-Ti3C2Tx) and S-CNTs synergistically enhanced the anticorrosion performance of the WPU coatings. After 120 days of immersion, the impedance of the A-Ti3C2Tx/S-CNTs/WPU composite coating at 0.01 Hz is still 4.2568 x 10(7) Omega cm(2). This improved performance depends on the good dispersibility and interface compatibility of the surface-functionalized Ti3C2Tx and S-CNTs in the coating layer. The prepared coating described in this study presents a great potential for practical protective coating applications like medical apparatus and instruments.
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