Effects of emulsifier on the bonding performance and freeze-thaw stability of starch-based wood adhesive

摘要

In this study, different emulsifiers were used to improve the bonding performance and freeze-thaw stability of renewable starch-based wood adhesive. The improved bonding performance and freeze-thaw stability were supported by the enhanced shear strength, grafted parameters, and viscosity stability after repeated freeze-thaw cycling. ζ-Potential determination, differential scanning calorimetry and pulsed nuclear magnetic resonance analysis indicated that the emulsifiers improve the grafting of vinyl acetate monomers into the starch bonds via free radical vinyl polymerization and hinder the aggregation of starch molecules. Among the emulsifiers tested, sodium dodecyl sulfate showed the highest improvement in the bonding performance and freeze-thaw stability of starch-based wood adhesives.