• bi-hybrid coatings: polyaniline-montmorillonite filler in organic-inorganic polymer matrix

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     a bi-hybrid composite is represented by an organic-inorganic (o-i) filler dispersed in an o-i matrix. polyaniline-montmorillonite, as a nanocomposite filler, was synthesised by two independent processes: (1) montmorillonite was surface-modified with a conducting polymer, polyaniline, during the in-situ oxidation of aniline or (2) montmorillonite was pre-treated with aniline, then the aniline was polymerised and the polyaniline subsequently produced penetrated the montmorillonite structure. the organic-inorganic polymer matrix was formed in two independent steps: (1) inorganic building units were formed in situ by the sol-gel process, (2) followed by organic polymeric matrix formation by polyaddition reactions of epoxy groups with amines. polyaniline-montmorillonite filler was added to the reaction system between these two steps, i.e. when the inorganic structures of the o-i matrix have already been formed but prior to formation of the organic polymeric matrix. two different o-i matrices were prepared from functionalised organosilicon precursors and oligomeric amines. 3-[(glycidyloxy)propyl]trimethoxysilane reacted with α,ω-oligo(propylene oxide) diamine and diethoxy[3-(glycidyloxy)propyl]-methylsilane reacted with α,ω-oligo(propylene oxide) triamine. the resulting bi-hybrid coatings, the o-i filler dispersed in the o-i matrix, were characterised by atomic-force and optical microscopies, and also by tensile tests. the filler composition affected both the mechanical and surface properties of the coatings.

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