Effect of carboxyl methyl cellulose on the adhesion properties of sodium silicate wood adhesive
Carboxyl methyl cellulose (CMC) was used to improve the bonding capacity of sodium silicate (Na2SiO3) wood adhesive in this study. Compared with Na2SiO3 wood adhesive without CMC, the bonding strength of Na2SiO3 wood adhesive with 7.5% CMC increased by 56.3% in dry state, while its water resistance did not improve. The improved performance of CMC/Na2SiO3 wood adhesive was supported by its strengthened molecular structure, enhanced thermal stability, beneficial changes in flexibility of Na2SiO3 wood adhesive from the analysis results using Fourier transform infrared spectroscopy, thermogravimetric analyzer, and scanning electron microscopy. The improvement effect of CMC on the structure and properties of the adhesive indicates that CMC can be used to prepare environmentally friendly Na2SiO3 wood adhesive with high performance.