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Comparative studies on corrosion protection properties of polyimide-silica and polyimide-clay composite materials

Authors

  • Tsao-Cheng Huang,

    1. Department of Chemistry, Center for Nanotechnology at CYCU, Chung-Yuan Christian University, Chung Li, Taiwan 32023, Republic of China
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  • Chi-Fa Hsieh,

    1. Chemical System Research Division, Chuang Shan Institute of Science and Technology, Tao-Yuan, Taiwan 32599, Republic of China
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  • Tzu-Chun Yeh,

    1. Department of Chemistry, Center for Nanotechnology at CYCU, Chung-Yuan Christian University, Chung Li, Taiwan 32023, Republic of China
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  • Cheug-Ling Lai,

    1. Department of Chemistry, Center for Nanotechnology at CYCU, Chung-Yuan Christian University, Chung Li, Taiwan 32023, Republic of China
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  • Mei-Hui Tsai,

    1. Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung, Taiwan 411, Republic of China
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  • Jui-Ming Yeh

    Corresponding author
    1. Department of Chemistry, Center for Nanotechnology at CYCU, Chung-Yuan Christian University, Chung Li, Taiwan 32023, Republic of China
    • Department of Chemistry, Center for Nanotechnology at CYCU, Chung-Yuan Christian University, Chung Li, Taiwan 32023, Republic of China
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Abstract

Comparative studies on corrosion protection properties of polyimide-silica-clay composites were studied in this article. A series of polyimide-silica (PIS), polyimide-clay (PIC), and polyimide-silica-clay composites (PISC) materials, consisting of an organo-soluble polyimide (ODA-BSAA) matrix, inorganic silica particles prepared through the sol–gel reaction of tetraethyl orthosilicate (TEOS) and dispersed nanolayers of inorganic montmorillonite clay, were successfully prepared by solution dispersion technique. Then, all samples were characterized by FTIR, powder X-ray diffraction patterns, transmission electron microscopy, and 29Si solid-state NMR. The main focus of this article is the comparison of the corrosion protection properties of PIS, PIC, and PISC composite materials. Normally, the aspect ratio of clay is higher than silica. Superior dispersion of clay platelets into a polymer matrix may effectively increase the length of diffusion pathways for oxygen and water. The effects of the materials composition on the corrosion protection performance, gas barrier, and optical properties, in the form of both coating and film, were also studied by electrochemical corrosion measurements (e.g., corrosion potential, polarization resistance, corrosion current, and impedance spectroscopy), gas permeability analysis, and UV-visible transmission spectroscopy. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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