Issue 36, 2022

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

Abstract

Polyurethane (PU) prepared by blending rosin base and CO2-polyol already has good mechanical properties and hydrophobic effect and has powerful benefits in acid and alkali resistance and salt resistance. In this study, mussel bionic rosin-based benzoxazine (BZ) was synthesized using dehydroabietylamine, catechol, and paraformaldehyde. Mixing BZ into PU can endow the resulting PU/BZ with special effects such as zero curing shrinkage, excellent mechanical behavior, and flame retardancy through a 3D interpenetrating network system. From the results, the modulus of rupture (MOR) and modulus of elasticity (MOE) of PU wood coatings are 97.04 and 2601.97 MPa, respectively; in contrast, the PU/BZ wood coatings exhibited higher values of MOR and MOE of 110.87 and 2738.11 MPa. PU/BZ wood coatings show higher flexural strength and elastic modulus. They are also stronger than PU coatings in terms of acid/alkali and aging resistance. At the same time, the coating is endowed with flame retardant properties, and the LOI is 30.2 due to the presence of BZ. Thus, PU/BZ can be a versatile and practical wood coating. The interpenetrating network system of PU/BZ has an innovative impact on the preparation of wood coatings.

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

Supplementary files

Article information

Article type
Paper
Submitted
20 Jūl. 2022
Accepted
17 Aug. 2022
First published
17 Aug. 2022

J. Mater. Chem. B, 2022,10, 6939-6945

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

X. Piao, H. Guo, Y. Cao, Z. Wang and C. Jin, J. Mater. Chem. B, 2022, 10, 6939 DOI: 10.1039/D2TB01535H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements