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AASCIT Communications | Volume 7, Issue 1 | Dec. 10, 2020 online | Page:1-6
Nanoscale Tailoring of Wood - a Novel Material Used in Photovoltaic Cells and Glass Windows as Promising Applications in Building Materials
In the present work, wood nanocomposites were successfully prepared by lignocellulosic removal through bleaching treatment and rapidly filled the microstructure gaps with the epoxy resin. The wood composite displays a remarkable improvement in its mechanical strength and optical haze compared to native balsa wood, potentially useful for building applications and solar panels. The work utilizes a delignification process that creates promising nanoporosity in the wood cell walls resulting in chemically modified cellulose nanofibers. The method includes removal of light-absorbing Lignin - responsible for the brownish color of wood and holding cellulose and hemicellulose together. The impregnation with index matching epoxy resin was carried out and found liable for the improved strength of the wood composite. Optically transparent wood exhibited a transmittance of 70.4% and an optical haze of 68.3%, a unique property that makes it suitable for use in solar cells, as it catches more solar radiation due to the favorable angle of contact. This convenient angle of contact enhances the kinetic energy of electrons, forming a continuous path for the flow of electrons across the band gaps in silicon chips. The surface morphology and wood chemistry were examined by experimental characterization techniques including FT-IR, SEM, and Transmittance-Haze. It was observed that the bleaching process of wood decreases its lignin content and the wood color changes from dark brown to entirely white indicating no lignin content, confirmed by FTIR results. The epoxy-based matrix played a significant role in enhancing the micromechanical strength and optical properties of the synthesized wood nanocomposite. Thus, this work emphasizes more on understanding the influence of nanoscale tailoring on wood mesoporous nanostructures. As a whole, the suggestive study reveals the promising application in the prospective area of building materials.
Rinky Ghosh, Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Uttar Pradesh, India.
Neha Kanwar Rawat, Department of Chemistry, Materials Research Laboratory, Jamia Millia Islamia, New Delhi, India.
Transparent Wood Composite, Lignin, Delignification, Micromechanical Strength, Eco-friendly, Transmittance and Haze
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Arcticle History
Submitted: Mar. 13, 2020
Accepted: Apr. 9, 2020
Published: Dec. 10, 2020
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