Halloysite Nanotubes as Nano-Carriers of Corrosion Inhibitors in Cement Formulations

Materials
Monica TonelliFrancesca Ridi

Abstract

The ingress of water, as a vehicle for many harmful substances, is the main cause of all the major physical and chemical degradation processes affecting concrete buildings. To prevent damage and protect concrete surfaces, coatings are generally used. Cement-based coatings in particular can act as a physical barrier and reduce the permeability of surfaces. In case of chloride-induced corrosion, corrosion inhibitors are also generally used, and nano-carriers have been proven to provide a long-term protective effect. In this work, we designed a surface protection cementitious coating enhanced with nano-silica and halloysite nanotubes (HNTs). HNTs were loaded with a corrosion inhibitor, benzotriazole (BTA), and used as nano-reservoir, while nano-silica was used to improve the structure of the protective coating and to strengthen its adhesion to the surface of application. The cementitious coatings were characterized with a multi-technique approach including thermal and spectroscopic analysis, scanning electron microscopy, specific surface area and pore size distribution, and Vickers hardness test. The release of BTA was monitored through UV-vis analysis, and the transportation of BTA through coated mortars was studied in simulated ...Continue Reading

References

Apr 2, 2010·ACS Applied Materials & Interfaces·Elshad AbdullayevYuri Lvov
Jul 1, 2011·Chemical Communications : Chem Comm·Dmitry G Shchukin, Helmuth Möhwald
Oct 7, 2015·Advanced Materials·Yuri LvovRawil Fakhrullin
Jun 21, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Elshad Abdullayev, Yuri Lvov

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Citations

Jan 22, 2021·Physical Chemistry Chemical Physics : PCCP·Giovanni FerraroPiero Baglioni

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Methods Mentioned

BETA
scanning electron microscopy
Infrared Spectroscopy

Software Mentioned

AUTOVICKERS ® Remet

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