Preparation and characterizations of a chitosan-based medium-density fiberboard adhesive with high bonding strength and water resistance

Xiaodi Ji; Bin Li; Bingnan Yuan; Minghui Guo

doi:10.1016/j.carbpol.2017.08.100

Preparation and characterizations of a chitosan-based medium-density fiberboard adhesive with high bonding strength and water resistance

Carbohydr Polym. 2017 Nov 15:176:273-280. doi: 10.1016/j.carbpol.2017.08.100. Epub 2017 Aug 24.

Authors

Xiaodi Ji¹, Bin Li², Bingnan Yuan³, Minghui Guo⁴

Affiliations

¹ Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China. Electronic address: mingduzhiwang@163.com.
² Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China. Electronic address: ok4545ok0@163.com.
³ Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China. Electronic address: 13766842078@163.com.
⁴ Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, PR China. Electronic address: gmh1964@126.com.

PMID: 28927608
DOI: 10.1016/j.carbpol.2017.08.100

Abstract

An efficient method was developed for preparing medium-density fiberboard (MDF) adhesives with high performance, using chitosan as the main component and glutaraldehyde as a crosslinking agent. The effects of glutaraldehyde content on the bonding strength and water resistance were investigated. The results indicated that the optimum internal bonding strength (IB, 1.22MPa), modulus of elasticity (MOE, 3162.69MPa), modulus of rupture (MOR, 29.10MPa), water absorption (WA, 22.23%) and thickness swell (TS, 26.17%) of the MDF complied with the requirement of the Chinese national standard for MDF. The chitosan-based adhesive was characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and X-ray diffractometry (XRD). The thermal stability and water holding capacity of the chitosan-based adhesives were influenced by the extent of crosslinking. The excellent properties were attributed to the network structure of the chitosan-based adhesives, formed by crosslinking of chitosan with self-polymerized glutaraldehyde or glutaraldehyde monomers through CN bonds.

Keywords: Bonding strength; Chitosan; Glutaraldehyde; MDF adhesive; Water resistance.