ABSTRACT
Research in smart self-healing materials for corrosion protection continues to flourish in recent years since our last review summary [1]. New developments in the advanced micro/nanocapsules have been one of the major focuses; significant work has been done in exploring choices of materials to form the shell, i.e. the micro/nanocontainer, as well as the variety of core contents to be encapsulated inside the container. This chapter intends to mainly give a concise review of the shell materials, including polymer, inorganic, and polyelectrolyte-based micro/nanocapsules. Moreover, respective specific self-healing mechanisms and chemical contents possibly encapsulated will also be discussed, which in some investigations have involved more than one stimulus, potentially enhancing the anticorrosion efficacy. Finally, technological possibilities of self-healing coatings have always been the ultimate goal of research, so in this short chapter, selective examples of technological applications will be described, and remarks will be provided for the current status and future trend.
