The invention discloses a long-
afterglow material based on waste PET and a preparation method and application thereof.Organic luminescent substance crown
alkene serves as luminescent molecules and is fused and doped into recycled waste PET, the waste PET is upgraded and reconstructed into a persistent luminescent
polymer element, PET macromolecular chains are folded front and back to form regular lamellas, and the lamellas are uniformly distributed on the surface of the waste PET, so that the long-
afterglow material based on the waste PET is obtained. Excitons are stabilized, and
oxygen in the
atmosphere is prevented from being quenched. Due to the planar and
rigid structure of the
polycyclic aromatic hydrocarbon, intramolecular movement can be inhibited, so that non-radiative decay channels are reduced, and the ultra-long
afterglow effect is realized. According to the long-afterglow material,
pollution of waste materials is reduced, upgrading and recycling of resources are achieved, upgrading and recycling steps are simple and convenient, cost is low, the preparation process is easy to scale, economical and efficient, and the long-afterglow material has good industrial popularization prospects and has important application value in the technical field of plastic upgrading and recycling.