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

机译：超声时间对聚氨酯/有机粘土纳米复合涂料传输性能的影响

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In this study, a series of polyurethane (PU)/ organically modified montmorillonite (OMMT) clay nanocomposites were synthesized by in situ polymerization technique through an uljxasonication-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 spectro-scopy (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.
机译：在这项研究中，通过超声处理辅助的原位聚合技术，在不同的加工时间下，合成了一系列聚氨酯（PU）/有机改性的蒙脱土（OMMT）粘土纳米复合材料。广角X射线衍射（WAXD）用于研究处理时间对黏土血小板分层程度的影响。为了评估超声处理时间对PU / OMMT复合材料传输性能的影响，通过水渗透测试确定了扩散系数和最大吸水率。进行了电化学阻抗光谱分析（EIS），以分析阻隔性能并评估这些复合涂层在碳钢板上的腐蚀性能。发现通过增加超声处理时间，纳米复合材料对水分子扩散的阻隔性能得到改善。这是由于粘土薄片的进一步分离和水分子行进路径的增强。

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