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首页> 外文期刊>Progress in Organic Coatings: An International Review Journal >Characterization of structure and corrosion resistivity of polyurethane/organoclay nanocomposite coatings prepared through an ultrasonication assisted process
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Characterization of structure and corrosion resistivity of polyurethane/organoclay nanocomposite coatings prepared through an ultrasonication assisted process

机译：通过超声辅助工艺制备的聚氨酯/有机粘土纳米复合涂层的结构和耐腐蚀性的表征

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摘要

In this study, a series of castor oil based polyurethane/organically modified montmorillonite (OMMT) clay nanocomposite coatings have been successfully prepared by effective dispersing of OMMT nano-layers in polyurethane matrix through an ultrasonication assisted process. Effectiveness of ultrasonication process in de-agglomeration of clay stacks in castor oil dispersions was evaluated by optical microscopy and sedimentation test. Structure of nanocomposite coatings was investigated by wide angle X-ray diffraction (WAXD) and Fourier-transform infrared spectroscopy (FT-IR). The anticorrosive properties of nanocomposite coatings were characterized by electrochemical impedance spectroscopy (EIS), Tafel polarization study, water absorption and pull-off adhesion tests. The experimental results showed that PU/OMMT nanocomposite coatings were superior to the neat PU in corrosion protection effects. Also, it was observed that the corrosion protection of polyurethane organoclay nanocomposite coatings is improved as the clay loading is increased up to 3 wt.%.
机译：在这项研究中，通过超声辅助工艺将OMMT纳米层有效分散在聚氨酯基质中，已经成功制备了一系列蓖麻油基聚氨酯/有机改性蒙脱土（OMMT）粘土纳米复合涂料。通过光学显微镜和沉降测试评估了超声处理在蓖麻油分散体中粘土堆解聚中的有效性。通过广角X射线衍射（WAXD）和傅立叶变换红外光谱（FT-IR）研究了纳米复合涂层的结构。通过电化学阻抗谱（EIS），Tafel极化研究，吸水率和剥离粘合力测试表征了纳米复合涂层的防腐性能。实验结果表明，PU / OMMT纳米复合涂层的防腐性能优于纯聚氨酯。同样，观察到，随着粘土含量增加至3重量％，聚氨酯有机粘土纳米复合涂层的腐蚀防护得到改善。

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