Issue 32, 2010

Clay nanotubes for corrosion inhibitor encapsulation: release control with end stoppers

Abstract

Halloysite clay tubes of 50 nm diameter and ca. 1000 nm length were analyzed as potential nanocontainers for loading, storage and induced sustained release of chemical agents. Halloysite is a natural aluminosilicate mineral with hollow cylindrical geometry and submicron size. Halloysite nanotubes loaded with the corrosion inhibitor benzotriazole can be admixed into paint to improve its anticorrosion performances as well as the coating tensile strength. Corrosion protection of such coating was evaluated by direct exposure of the coated metal (copper) to highly corrosive media. Loading and release characteristics of benzotriazole from these nanotubes were optimized. Benzotriazole release kinetics correspond to the time needed for the formation of a metal protective layer through copper complexation. For formation of the tube end stoppers, benzotriazole loaded halloysite was exposed to the solution of Cu(II) ions, and kinetics of the stopper complex formation was analyzed. Tunable release of benzotriazole was achieved by controlling the strength of the stopper complexes, and the release time may be varied from ten to hundreds of hours. A possibility for the tube on/off release switch was demonstrated.

Graphical abstract: Clay nanotubes for corrosion inhibitor encapsulation: release control with end stoppers

Supplementary files

Article information

Article type
Paper
Submitted
23 Mar 2010
Accepted
08 May 2010
First published
30 Jun 2010

J. Mater. Chem., 2010,20, 6681-6687

Clay nanotubes for corrosion inhibitor encapsulation: release control with end stoppers

E. Abdullayev and Y. Lvov, J. Mater. Chem., 2010, 20, 6681 DOI: 10.1039/C0JM00810A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements