Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics

Abstract The current study used sustainable and green approaches to convey polymer composites with desired optical properties. The extracted green tea dye (GTD) enriched with ligands was used to synthesize zinc metal complexes. Green chitosan biopolymer incorporated with green synthesized metal comp...

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Main Authors: Dyari M. Mamand, Sarkawt A. Hussen, Shujahadeen B. Aziz
Format: Article
Language:English
Published: Nature Portfolio 2025-01-01
Series:Scientific Reports
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Online Access:https://doi.org/10.1038/s41598-024-75953-6
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author Dyari M. Mamand
Sarkawt A. Hussen
Shujahadeen B. Aziz
author_facet Dyari M. Mamand
Sarkawt A. Hussen
Shujahadeen B. Aziz
author_sort Dyari M. Mamand
collection DOAJ
description Abstract The current study used sustainable and green approaches to convey polymer composites with desired optical properties. The extracted green tea dye (GTD) enriched with ligands was used to synthesize zinc metal complexes. Green chitosan biopolymer incorporated with green synthesized metal complex using casting technique was used to deliver polymer composites with improved optical properties. The FTIR-ATR was used to identify the functional groups of the GTD, pure CS, and functional groups surrounding the synthesized zinc metal complex. Distinguished ATR bands were observed in green tea dye spectra, such as OH, C = O, and NH functional groups ascribed to various polyphenols. The ATR bands of the zinc metal complex compared to GDT established that GDT is crucial to capturing zinc cations and producing the Zn2+-metal complex. The broadness of the bands observed in CS-based composites inserted with the Zn2+- metal complex confirms strong interaction among the components of polymer composites. The XRD achievements confirm that CS films with different Zn2+- metal complex concentrations transferred to an amorphous composite. The XRD pattern of composite films establishes that the zinc metal complex scarified the crystalline phases of chitosan. Linear optical properties such as absorption, refractive index (n), and optical dielectric parameters were improved. The absorption edge of the composite’s films shifted to lower photon energies. Various models were used to determine the optical band gap. The band gap drops from $$\:5.3\:to\:\approx\:\:1.5\:\text{e}\text{V}$$ when chitosan is loaded with a 36% Zn2+-metal complex. The Spitzer-Fan method is used to get the dielectric constant, and the Drude Lorentz oscillator model was used to calculate vital optical parameters, including N/m*, τ, and µ opt . The W-D single oscillator model was used to determine the E o and E d parameters. The values of optical moments (M −1 and M −3 ) were calculated with the help of the W-D model. The oscillator’s strength ( $$\:{S}_{0}$$ ) and wavelength ( $$\:{\lambda\:}_{0}$$ ) were determined via the Sellmeier model using the linear refractive index. The first-order nonlinear ( $$\:{\chi\:}^{\left(1\right)}$$ ), second-order non-linear ( $$\:{\chi\:}^{\left(2\right)}$$ ) and third-order nonlinear optical susceptibility ( $$\:{\chi\:}^{\left(3\right)}$$ ) were determined for all the films.
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spelling doaj-art-bf1a21985a384b4f9883c4128d67b9f12025-01-26T12:24:45ZengNature PortfolioScientific Reports2045-23222025-01-0115112810.1038/s41598-024-75953-6Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristicsDyari M. Mamand0Sarkawt A. Hussen1Shujahadeen B. Aziz2Department of Chemistry, College of Science, University of RaparinHameed Majid Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of SulaimaniTurning Trash to Treasure Laboratory (TTTL), Research and Development Center, University of SulaimaniAbstract The current study used sustainable and green approaches to convey polymer composites with desired optical properties. The extracted green tea dye (GTD) enriched with ligands was used to synthesize zinc metal complexes. Green chitosan biopolymer incorporated with green synthesized metal complex using casting technique was used to deliver polymer composites with improved optical properties. The FTIR-ATR was used to identify the functional groups of the GTD, pure CS, and functional groups surrounding the synthesized zinc metal complex. Distinguished ATR bands were observed in green tea dye spectra, such as OH, C = O, and NH functional groups ascribed to various polyphenols. The ATR bands of the zinc metal complex compared to GDT established that GDT is crucial to capturing zinc cations and producing the Zn2+-metal complex. The broadness of the bands observed in CS-based composites inserted with the Zn2+- metal complex confirms strong interaction among the components of polymer composites. The XRD achievements confirm that CS films with different Zn2+- metal complex concentrations transferred to an amorphous composite. The XRD pattern of composite films establishes that the zinc metal complex scarified the crystalline phases of chitosan. Linear optical properties such as absorption, refractive index (n), and optical dielectric parameters were improved. The absorption edge of the composite’s films shifted to lower photon energies. Various models were used to determine the optical band gap. The band gap drops from $$\:5.3\:to\:\approx\:\:1.5\:\text{e}\text{V}$$ when chitosan is loaded with a 36% Zn2+-metal complex. The Spitzer-Fan method is used to get the dielectric constant, and the Drude Lorentz oscillator model was used to calculate vital optical parameters, including N/m*, τ, and µ opt . The W-D single oscillator model was used to determine the E o and E d parameters. The values of optical moments (M −1 and M −3 ) were calculated with the help of the W-D model. The oscillator’s strength ( $$\:{S}_{0}$$ ) and wavelength ( $$\:{\lambda\:}_{0}$$ ) were determined via the Sellmeier model using the linear refractive index. The first-order nonlinear ( $$\:{\chi\:}^{\left(1\right)}$$ ), second-order non-linear ( $$\:{\chi\:}^{\left(2\right)}$$ ) and third-order nonlinear optical susceptibility ( $$\:{\chi\:}^{\left(3\right)}$$ ) were determined for all the films.https://doi.org/10.1038/s41598-024-75953-6ChitosanGreen Tea PolyphenolMetal complexXRD and ATR-FTIRUV-vis and optical properties
spellingShingle Dyari M. Mamand
Sarkawt A. Hussen
Shujahadeen B. Aziz
Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics
Scientific Reports
Chitosan
Green Tea Polyphenol
Metal complex
XRD and ATR-FTIR
UV-vis and optical properties
title Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics
title_full Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics
title_fullStr Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics
title_full_unstemmed Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics
title_short Green approach to synthesis polymer composites based on chitosan with desired linear and non-linear optical characteristics
title_sort green approach to synthesis polymer composites based on chitosan with desired linear and non linear optical characteristics
topic Chitosan
Green Tea Polyphenol
Metal complex
XRD and ATR-FTIR
UV-vis and optical properties
url https://doi.org/10.1038/s41598-024-75953-6
work_keys_str_mv AT dyarimmamand greenapproachtosynthesispolymercompositesbasedonchitosanwithdesiredlinearandnonlinearopticalcharacteristics
AT sarkawtahussen greenapproachtosynthesispolymercompositesbasedonchitosanwithdesiredlinearandnonlinearopticalcharacteristics
AT shujahadeenbaziz greenapproachtosynthesispolymercompositesbasedonchitosanwithdesiredlinearandnonlinearopticalcharacteristics