Self-sensing fluorescence polymer composites for chemical degradation protection and monitoring

Abstract

The development of epoxy-based composites with the combination of protective and self-sensing capabilities continues to be a challenge in particular with respect to chemical and UV degradation. A promising approach is to fabricate these composites with phosphors particles, which provide the needed self-sensing characteristics. In this context, Y3Al5O12:Ce3+ (YAG:Ce) particles at different concentrations have been introduced into an epoxy polymer matrix, further placed in a laminate structure. The system was then exposed to specific degradation environments, including sulfuric acid and ultraviolet (UV) irradiation. The effects of these exposure treatments on the structural, mechanical, and optical properties of composites were investigated. A correlation between the variation of the physical-chemical parameters of the samples and the presence of YAG:Ce particles was observed, which demonstrate the self-sensing capabilities of the system. It is also demonstrated that fiberglass reinforced epoxy layered structures act as a good protective coating in sulfuric acid solution, while these layers degrade under UV irradiation. These findings provide a suitable platform for the development of coatings allowing to protect, detect and monitor corrosion in pipes and tanks under different industrial conditions.