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Study on the effect of ultrasonication time on transport properties of polyurethane/organoclay nanocomposite coatings

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Abstract

In this study, a series of polyurethane (PU)/organically modified montmorillonite (OMMT) clay nanocomposites were synthesized by in situ polymerization technique through an ultrasonication-assisted process at various processing times. Wide angle X-ray diffraction (WAXD) was employed to investigate the effect of processing time on degree of delamination of clay platelets. In order to evaluate the effect of ultrasonication time on transport properties of the PU/OMMT composites, diffusion coefficient and maximum water uptake were determined through a water permeation test. Electrochemical impedance spectroscopy (EIS) was carried out to analyze the barrier properties and to evaluate the corrosion performance of these composite coatings on carbon steel panels. It was found that by increasing sonication time, the barrier property of nanocomposites against diffusion of water molecules was improved. This is due to further separation of clay platelets and enhancement of the traveling pathways for water molecules.

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Acknowledgments

This study has been supported by Research and Development Centre of Bandar Imam petrochemical complex. The authors would thank Dr. A. Ashrafi, Mr. M. Sadeqzadeh, and Dr. D. Zaarei for helpful suggestions and comments. Also, the authors gratefully acknowledge the support of Mr. Sherafati from Bajak Paint Co. Ltd.

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Authors and Affiliations

  1. Technical Inspection Engineering Department, Petroleum University of Technology, Abadan, Iran

    M. Heidarian, M. R. Shishesaz & M. Nematollahi

  2. Polymer Engineering Department, Amirkabir University of Technology, Tehran, Iran

    S. M. Kassiriha

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  1. M. Heidarian
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  2. M. R. Shishesaz
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  3. S. M. Kassiriha
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  4. M. Nematollahi
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Correspondence to M. Heidarian.

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Heidarian, M., Shishesaz, M.R., Kassiriha, S.M. et al. Study on the effect of ultrasonication time on transport properties of polyurethane/organoclay nanocomposite coatings. J Coat Technol Res 8, 265–274 (2011). https://doi.org/10.1007/s11998-010-9297-7

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  • DOI: https://doi.org/10.1007/s11998-010-9297-7

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