Characterization of structure and corrosion resistivity of polyurethane/organoclay nanocomposite coatings prepared through an ultrasonication assisted process

被引：87
作者：
Heidarian, M. [1 ]
Shishesaz, M. R. [1 ]
Kassiriha, S. M. [2 ]
Nematollahi, M. [1 ]
机构：
[1] Petr Univ Technol, Tech Inspect Engn Dept, Abadan, Iran
[2] Amir Kabir Univ Technol, Dept Polymer Engn, Tehran, Iran
来源：
PROGRESS IN ORGANIC COATINGS | 2010年 / 68卷 / 03期
关键词：
Nanocomposite coating; Sonication; Electrochemical impedance spectroscopy; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; LAYERED SILICATE NANOCOMPOSITES; POLYURETHANE/CLAY NANOCOMPOSITES; ORGANIC COATINGS; PERFORMANCE; CLAY; POLYMERIZATION; NANOCLAY; EIS;
D O I：
10.1016/j.porgcoat.2010.02.006
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
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.%. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：180 / 188
页数：9
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