Preparation and exploration of multifunctional wood coating based on an interpenetrating network system of CO2-polyurethane and natural bio-based benzoxazine

Exploration of multifunctional wood coating based on an interpenetrating network system of rosin-CO2-based polyurethane and mussel bionic rosin-based benzoxazine

“…Furthermore, the bands at 1538 cm −1 correspond to the N–H group in carbamate, and the band at 1712 cm −1 corresponds to the CO group in carbamate. 30 The characteristic bands of the BZ ring are located at 1260 cm −1 , 1064 cm −1 (asymmetric and symmetric stretching of C–O–C), 1110 cm −1 (symmetric stretching vibrations of C–N–C), and 945 cm −1 (out-of-plane bending of H–C–H), 31 indicating the synthesis of mussel biomimetic rosin-based BZ (Fig. S4, ESI†).…”

Recent Advances in Bio-Based Wood Protective Systems: A Comprehensive Review

“…Good flame-retardant performance has also been associated with the natural compound benzoxazine (BZ) [84]. BZ can be mixed with polyurethane to create an interpenetrating network system, with excellent hydrophobicity values and improved resistance both to acids and to basic substances, compared with the reference polyurethane.…”

Finishing properties of bleached and unbleached bio-polyurethane wood coating

“…The researchers found that gradually adding pyrolytic lignin to MDI overcame the issue of a brittle polymer and made it more suitable for use as a protective coating. Meanwhile, the research conducted by Piao et al (2022) primarily concentrated on the synthesis and performance evaluation of CO2-based PU wood coatings. This involved significant adjustments and modifications to enhance various functional properties, including heat resistance, acid and alkali resistance, hydrophobicity, and flame retardancy, aiming to develop more multifunctional characteristics.…”