Pine Bark Tannin-Based Resins for Wood Composite Applications.

ABSTRACT: This study investigates the viability of using tannins extracted from pine barkspecifically Pinus ponderosa (PT), Pinus radiata (RT), and a commercial maritime pine bark tannin (CT)as a substitute for phenol in phenol-resorcinol-formaldehyde (PRF) resins. Tannins were hot-water-extracted from bark and characterized by TGA, FTIR, ESI-MS, and NMR, revealing distinct differences in chemical structure, molar mass, and thermal stability. Resin systems were prepared using PRF, tannin, and tannin-PRF hybrids (1:1) and were (i) evaluated for adhesive properties by lap shear tests and (ii) incorporated into hot-pressed wood composites (50:50), followed by characterization of thermal, mechanical, rheological, and water absorption properties. The PRF and PT-PRF resins showed excellent

SUBMITTER: Ahmed S 

PROVIDER: S-EPMC12676310 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature