Novel crystalline and thermally stable chitosan-chromone based polymers: Synthesis and characterization

Herein, simple, cheap and eco-friendly methods were employed for the modification of chitosan-chromone (Chs-Chr) polymer via inclusion with beta-cylcodextrine (beta-CD), and doping with ZnO nanopar-ticles (NPs) to give (pseudopolyrotaxane) and (Chs-Chr/ZnO NPs) composite, respectively. The structural and morphological characterizations of the novel synthesized derivatives were confirmed by utilizing FT-IR, XRD and SEM analysis, respectively. The optical properties of the synthesized polymers were also investigated. Furthermore, their thermal stability was investigated by thermal gravimetric analysis (TGA). FT-IR and XRD results indicate the complete formation of (Chs-Chr) polymer, good interaction with ZnO NPs, and successful insertion through beta-CD rings. The released results confirmed that the promising new approach of the synthesis route anchored in modifying (Chs-Chr) polymer by beta-CD or ZnO NPs drastically enhanced the thermal stability and optical features of the synthesized polymers making it more suitable for a wide range of industrial uses. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study employed simple, cheap, and eco-friendly methods to modify the chitosan-chromone (Chs-Chr) polymer by inclusion with beta-cyclodextrine (beta-CD) and doping with ZnO nanoparticles (NPs) to form (pseudopolyrotaxane) and (Chs-Chr/ZnO NPs) composite, respectively. The FT-IR, XRD, and SEM analysis confirmed the structural and morphological characteristics of the synthesized derivatives. The modification significantly enhanced the thermal stability and optical properties of the polymers, making them suitable for a wide range of industrial applications.