Environment-friendly wood fibre composite with high bonding strength and water resistance.

Xiaodi Ji,Tat Thang Nguyen,Minghui Guo,Xueqi Chen,Yue Dong

doi:10.1098/rsos.172002

Abstract

With the growing depletion of wood-based materials and concerns over emissions of formaldehyde from traditional wood fibre composites, there is a desire for environment-friendly binders. Herein, we report a green wood fibre composite with specific bonding strength and water resistance that is superior to a commercial system by using wood fibres and chitosan-based adhesives. When the mass ratio of solid content in the adhesive and absolute dry wood fibres was 3%, the bonding strength and water resistance of the wood fibre composite reached the optimal level, which was significantly improved over that of wood fibre composites without adhesive and completely met the requirements of the Chinese national standard GB/T 11718-2009. Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) characterizations revealed that the excellent performance of the binder might partly be due to the amide linkages and hydrogen bonding between wood fibres and the chitosan-based adhesive. We believe that this strategy could open new insights into the design of environment-friendly wood fibre composites with high bonding strength and water resistance for multifunctional applications.

Highlights

With a rapidly developing economy, the demand for woodbased materials has been increasing in China, but China is a country that does not have large forestry resources
The influence of the mass ratio of solid content in adhesive and absolute dry wood fibres on the performance of the wood fibre composites is shown in figure 2
During the second stage corresponding to the mass ratio in the range from 3% to 5%, the mechanical performance of wood fibre composites deteriorated with increasing mass ratio

Summary

Introduction

With a rapidly developing economy, the demand for woodbased materials has been increasing in China, but China is a country that does not have large forestry resources. The juxtaposition of the increasing need for wood-based materials and the short supply has caused wide concerns for the people of China. There are large amounts of residual forest products being produced in China [1], most of which were dispersed or combusted. Using forest residue as a raw material.

Methods

Results

Conclusion