Sustainable Chitosan-Aminated Starch Blends as Innovative Materials for Advanced Optical Applications

IF 4.7 3区工程技术 Q2 ENGINEERING, ENVIRONMENTAL

Journal of Polymers and the Environment Pub Date : 2024-12-10 DOI:10.1007/s10924-024-03462-8

Amritha Radhakrishnan, Unnikrishnan Gopalakrishna Panicker

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Abstract

The development of bio-based polymer blends for optoelectronic applications constitutes a pivotal and sustainable approach in the domain of materials science. In this work, biopolymer films, having a low bandgap and high optical conductivity, have been developed using chitosan and aminated starch, through a casting route. Initially, aminated starch synthesised by reductive amination was subjected to the evaluation of its structural, optical, thermal, and morphological features. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-visible ), field emission scanning electron microscopy (FE-SEM), contact angle evaluation, mechanical studies, biodegradability evaluation, and thermal examinations were executed to evaluate the functional performance of the blends, duly assisted by computational analysis. FE-SEM confirmed the homogeneity, while XRD indicated the amorphous nature of the blends. Thermogravimetric analysis (TGA) highlighted the increase in thermal stability with an increase in the aminated starch content in the blends. The UV-visible measurements indicated high optical conductivity (7 × 10⁹ S/cm) and increased absorption coefficient (56 mm⁻¹) for an optimized blend with high aminated starch content. The energy band gap has been found to reach 2.3 eV, which makes the system a potential candidate for various optoelectronic applications. Computational analysis based on density functional theory (DFT) has been found to support the experimental observations effectively.

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来源期刊

Journal of Polymers and the Environment 工程技术-高分子科学

CiteScore

9.50

自引率

7.50%

发文量

297

审稿时长

9 months

期刊介绍： The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.