Phosphorylation of Lignin with Phytic Acid Improves Thermal Stability and Flame Retardancy Performance
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United States of America Patent
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Mar 27, 2025
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Sep 17, 2024
filing date -
Sep 17, 2024
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Abstract
Kraft lignin was modified with phytic acid (C6H18O24P6 PHA), a bio-based reagent with high amount of phosphorus, in a facile solvent-free reaction at low temperature, to produce a novel reactive bio-based flame retardant. The thermochemical properties of the fabricated lignin derivative were comprehensively analyzed by advanced tools, such as 1H NMR, 31P NMR, HSQC-NMR, XPS, ICP-AES, TGA, and DSC. A smoke detector and limiting oxygen index investigated the flame retardancy behavior of modified lignin used for coating wood samples.
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