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Effect of montmorillonite on properties of nanocomposite coatings

机译:蒙脱土对纳米复合涂层性能的影响

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Unmodified or chemically modified montmorillonite (MMT) dispersed in water was added into the reaction mixture forming hybrid organic-inorganic (O-I) nanocomposite coating. Two basic systems made from functionalised trialkoxysilane and oligomeric diamine v. functionalised dialkoxysilane and triamine were prepared and compared. End properties depend not only on the concentration and kind of MMT used but also on the inner constitution of the O-I matrix. Already 1 wt-% of unmodified MMT influences considerably surface and mechanical properties, but the effect of chemically modified MMT is not so pronounced. This can be due to worse dispersion (scattering) of chemically modified MMT within the O-I matrix compared with unmodified one: while unmodified MMT is partially intercalated, partially exfoliated in the product, substantial amount of original, unaffected MMT clusters was found there. Solid state nuclear magnetic resonance spectroscopy confirmed the interaction of MMT platelets with the O-I matrix.
机译:将分散在水中的未改性或化学改性的蒙脱土(MMT)添加到反应混合物中,形成杂化有机-无机(O-1)纳米复合涂层。制备并比较了由官能化的三烷氧基硅烷和低聚二胺与官能化的二烷氧基硅烷和三胺制成的两个基本体系。最终性能不仅取决于所用MMT的浓度和种类,还取决于O-I基质的内部结构。未改性的MMT的1%(重量)已经对表面和机械性能产生了很大的影响,但是化学改性的MMT的效果还不那么明显。这可能是由于与未经修饰的MMT相比,化学修饰的MMT在O-I基质中的分散(散射)更糟:虽然未修饰的MMT被部分插入,部分被剥落在产品中,但在那里发现了大量原始的,未受影响的MMT簇。固态核磁共振波谱证实了MMT血小板与O-I基质的相互作用。

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