SBIR Phase I: Polyaniline Epoxy Primer with Related Topcoat: the Anticorrosion Coating System of a Barrier to Cations with a Barrier to Anions

这个小企业创新研究一期项目的更广泛的影响/商业潜力是将下一代防腐涂料推向市场，比目前的防腐涂料具有更高的保护效率和更环保的环境。在世界范围内，腐蚀的直接成本占一个国家GDP的3-5%。为了减少巨大的经济损失，迫切需要开发更有效的防腐技术。目前使用的最有效的防腐颜料是重金属颜料，如铬酸盐、铅化合物和锌/锌化合物。环境、健康和安全方面的考虑正在推动消除重金属颜料。该涂层基于导电聚合物分散体。导电聚合物的使用开辟了一系列新的应用领域。但导电聚合物的可加工性差，阻碍了静电耗散、电磁干扰屏蔽、防静电纤维、导电油墨、碳粉和粘合剂等应用的增长。本项目中导电聚合物分散体的成功开发也可能使导电聚合物得到更广泛的应用。金属的腐蚀是一种产生阳离子和阴离子的电化学反应过程，并因环境中具有侵略性的阴离子而加速。一般认为，有机涂层在涂层与环境界面处起着阻隔水和氧的作用。我们已经确定屏障涂层的限制因素是它们对离子电流的抵抗力。本研究建议开发一种重金属无离子屏障防腐涂料体系：导电聚合物纳米粒子环氧底漆加面漆。底漆和面漆的结合对阴离子和阳离子都形成了屏障，从而抑制了电化学腐蚀反应，从而为金属提供了有效的腐蚀保护。如果本研究成功，它将展示离子屏障涂层的工作原理，以及如何制备离子屏障防腐涂层，并导致下一代防腐涂层-离子屏障防腐涂层。

The broader impact/commercial potential of this Small Business Innovation Research Phase I project is in bringing the next generation of anticorrosion paints to market, with higher protection efficiency and greater environmental friendliness than the current anticorrosion paints. The direct cost of corrosion accounts for 3-5% of a country's GDP worldwide. To reduce the huge economic lost, it is highly desirable to develop more effective anticorrosion technologies. The most effective anticorrosion pigments in use today are heavy metal pigments, such as chromates, lead compounds, and zinc/zinc compounds. Environmental, health, and safety concerns are driving the elimination of heavy metal pigments. The coating is based on conductive polymer dispersion. The use of conductive polymers has opened up a range of new applications. But the poor processibility of conductive polymers has stymied the growth of applications such as electrostatic dissipation, electromagnetic interference shielding, static resistant fibers, conductive inks, toners, and adhesives, etc. Successful development of conductive polymer dispersion in this project may also enable these broader applications of conductive polymers. Corrosion of metals is an electrochemical reaction process that produces both cations and anions, and accelerates by the aggressive anions in the environment. Generally it is assumed that organic coatings act as barriers to water and oxygen at the coating - environment interface. We have determined that the limiting factor in barrier coatings is their resistance to the ionic current. The present proposal suggests developing a heavy metal free ion barrier anticorrosion coating system: conductive polymer nano-particle pigmented epoxy primer with a topcoat. The combination of the primer and topcoat constructs a barrier to both anions and cations, that inhibits the electrochemical corrosion reaction, therefore, provides efficient corrosion protection to the metal. If present proposed research succeeds, it will demonstrate how an ion barrier coating works, and how to formulate an ion barrier anticorrosion coating, and lead to the next generation of anticorrosion coating - the ion barrier anticorrosion coatings.