乳化剂十六烷基三甲基溴化铵对木材用淀粉胶粘剂使用性能的影响

Effect of CTAB on the application performance of starch-based wood adhesive

摘要:

研究了乳化剂十六烷基三甲基溴化铵（CTAB）的添加对木材用淀粉胶粘剂粘接性能、粘度、流动性、贮藏稳定性的影响，并对其作用机理进行了初步探讨。实验结果表明，CTAB的添加会导致木材用淀粉胶粘剂压缩剪切强度的小幅下降，但可以降低淀粉胶粘剂的粘度，明显改善玉米淀粉胶粘剂的流动性，提高淀粉胶粘剂的贮藏稳定性；CTAB添加量以占淀粉干基质量1.5%为宜，其所改性的木材用淀粉胶粘剂具有良好的使用性能。差示扫描量热仪（DSC）和扫描电子显微镜（SEM）分析可知CTAB的作用机理可能是阻碍了淀粉分子的聚集，从而抑制了淀粉的短期回生和长期回生。

Abstract:

The effects of cetyl trimethyl ammonium bromide (CTAB) on shear strength, viscosity, mobility and storage stability of starch-based wood adhesive were studied. The action mechanisms of CTAB were preliminarily discussed. It was showed that, although CTAB addition resulted in slight decrease in shear strength of starch-based wood adhesive, the mobility and the storage stability of adhesive could be improved significantly. 1.5%(w/w, dry starch basis) of CTAB led to good application performance of starch-based wood adhesive. The results of differential scanning calorimeter(DSC) and scanning electron microscopy (SEM) suggested that action mechanisms of CTAB might be to hinder the aggregation of starch molecules, which inhibited the short-term and long-term retrogradation of starch.