Tanning capacity of Tessmannia burttii extracts: the potential eco-friendly tanning agents for the leather industry

Abstract In the present study, tannins from stem and root barks of Tessmannia burttii Harms ( Caesalpiniaceae ), a plant species abundantly growing in Tanzania other parts Africa, were investigated for their suitability hides tanning. Tannin powder was extracted at selected temperatures (30, 50 80 °C) influence each temperature on crosslinking capacity evaluated. The interaction mechanism between hide collagen studied by Differential Scanning Calorimetry (DSC), trinitrobenzensulfonic (TNBS) acid assay amino hydrolysis methods. Extraction showed low tannins. However, extract obtained °C exhibited best performance terms gap size T onset peak . bark yield higher than that bark, but both within recommended ranges. tannin content (61%) T. above value (10%), whereas its total phenolic flavonoic found to be commercial Acacia mearnsii tannin. study cross-linking parameters as function pH occur via covalent basic groups. bonds not resistant hydrolysis. observed indicated belong condensed tannin, similar A. (black wattle), source used this reference. Findings depict extracts are auspicious eco-friendly alternative vegetable overcome use chromium salts leather industry. Graphical abstract