TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Klein, Stephanie Elisabeth A1 - Alzagameem, Abla A1 - Rumpf, Jessica A1 - Korte, Imke A1 - Kreyenschmidt, Judith A1 - Schulze, Margit T1 - Antimicrobial Activity of Lignin-Derived Polyurethane Coatings Prepared from Unmodified and Demethylated Lignins JF - Coatings N2 - Due to global ecological and economic challenges that have been correlated to the transition from fossil-based to renewable resources, fundamental studies are being performed worldwide to replace fossil fuel raw materials in plastic production. One aspect of current research is the development of lignin-derived polyols to substitute expensive fossil-based polyol components for polyurethane and polyester production. This article describes the synthesis of bioactive lignin-based polyurethane coatings using unmodified and demethylated Kraft lignins. Demethylation was performed to enhance the reaction selectivity toward polyurethane formation. The antimicrobial activity was tested according to a slightly modified standard test (JIS Z 2801:2010). Besides effects caused by the lignins themselves, triphenylmethane derivatives (brilliant green and crystal violet) were used as additional antimicrobial substances. Results showed increased antimicrobial capacity against Staphylococcus aureus. Furthermore, the coating color could be varied from dark brown to green and blue, respectively. KW - brilliant green KW - demethylation KW - triphenylmethane dyes KW - polyurethane coatings KW - lignin KW - antimicrobial activity KW - crystal violet UN - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-45737 SN - 2079-6412 SS - 2079-6412 U6 - https://doi.org/10.3390/coatings9080494 DO - https://doi.org/10.3390/coatings9080494 VL - 9 IS - 8 PB - MDPI CY - Basel ER -