Application Of Aggregation-induced Emission Mechanism In Fluorescent Functional Coatings

In order to turn traditional coatings into a new type of intelligent material that not only has anti-corrosion and aesthetic effects but also has the ability to respond to the environment and other monitoring performance,researchers have made a lot of research.Epoxy resin and inorganic filler montmorillonite are the main materials used to prepare coatings.When they are given a special fluorescence property—Aggregation Induced Luminescence?AIE?properties,not only can they be studied by studying changes in the fluorescence intensity of coatings,changes in coating can also provide new ideas for the intelligent research of other similar traditional materials.The main research contents and results of this paper are as follows:?1?We have synthesized a new polymer induced emission?AIE?resin called TPE-EPOXY resin for this problem.The principle is to use TPE-2CH₂NH₂ amino structure and epoxy resin ring-opening polymerization,and the AIE cured coatings were prepared.According to the constraints of the intramolecular rotation?RIR?mechanism,the structural changes inside these polymers are directly reflected in the increase or decrease of the fluorescence intensity of the cured coating,and thus the preparation,curing and aging processes of AIE polymer resins and coatings can be observed in real-time.The experimental results in this chapter provide an easy way to solve the relationship between internal structure and polymer material properties.Moreover,the prepared AIE polymer resin has the potential to expand the application fields of the AIE mechanism.?2?Further exploring of the use of fluorescent epoxy resin in coatings are mainly to study the role of fluorescent coatings in the curing process,gas response process,organic-inorganic hybrid coating distribution process and brine corrosion process.Firstly,a one-step alkali addition method was used to synthesize fluorescent epoxy resin.TPE-2CH₂Br molecules were introduced into the reaction process to provide the aggregation-induced luminescence function?AIE?for the the epoxy resin.The results show that the self-synthesized fluorescent resin can show its internal structure change during the curing process,repeated response to ambient temperature,sensitivity to xanthene gas and ammonia gas through the change of fluorescence intensity.And it also show some unique advantages in observation of the distribution of montmorillonite,talcum and mica powder for hybrid coatings,and the feasibility of replacing EIS in the study of corrosion process.?3?We successfully designed and synthesized a novel water-dispersed AIE-gen,and then systematically studied its aggregation-induced luminescence properties.In addition,montmorillonite was modified by ion exchange synthesis method.And AIE-gen,which intercalates into sodium montmorillonite,can impart luminescent properties to montmorillonite.The modified fluorescent montmorillonite hybird coating can emit light under CFM and clearly shows the distribution state of the inorganic powder in the polymer matrix.In addition,the principle of repeated temperature response and corrosion process of the cured composite coating was studied in detail by fluorescein PL-spectroscopy to show that it has operability in future applications such as high-performance smart coatings.