Shin Hun Yi Jo Seong Mu Kim Sung-Soo 2024-01-12T02:35:21Z 2024-01-12T02:35:21Z 2022-11-23 2022-11 0926-6690 https://pubs.kist.re.kr/handle/201004/75936 A chemically mild methodology was demonstrated to obtain decomposed lignin products via oxidative depolymerization. We effectively produced light-colored lignin materials with low molecular weight and narrow molecular weight distribution by simple agitation at ambient temperature and pressure in the presence of potassium tert-butoxide and gaseous oxygen. This oxidative depolymerization dissociated various lignin bonding structures and oxidized aliphatic hydroxyl groups of lignin, expanding conjugated system within the depolymerized lignin molecules. This chemical transformation resulted in the generation of effective chromophoric moieties to enhance the UV absorption property of the resulting depolymerized products, which showed a significant improvement in the sun protection capability. English Elsevier BV Oxidative depolymerization of kraft lignin assisted by potassium tert-butoxide and its effect on color and UV absorption Article 10.1016/j.indcrop.2022.115539 1 Industrial Crops and Products, v.187 Industrial Crops and Products 187 N scie scopus 000877803800106 Agricultural Engineering Agronomy Agriculture Article SUNSCREEN PERFORMANCE FRACTIONATION COMPOSITES CONVERSION CHEMICALS SOLVENT Lignin Oxidation Depolymerization Decolorization UV protection