用玉米淀粉与过硫酸铵反应制备了氧化淀粉胶黏剂,再与二羟甲基双氰胺( DMDCD)进行交联反应,制备了一种交联改性氧化淀粉胶黏剂。 采用红外光谱对样品进行了表征,并讨论了交联改性对氧化淀粉胶黏剂耐水性和贮存稳定性的影响。 实验结果表明:DMDCD 改性提高了淀粉胶黏剂的耐水性与贮存稳定性;当过硫酸铵质量分数为淀粉质量的 1. 5% ,DMDCD 质量分数为淀粉质量的 3% 时,交联改性氧化淀粉胶黏剂的贮存稳定性在 45 d 以上,其耐水时间、黏度分别为 102 h 和 1680 mPa·s;红外分析证实了 DMDCD 与氧化淀粉发生了交联反应。

A new crosslinking modification oxidized starch adhesive was prepared using corn starch and ammonium persulfate as main materials, and crosslinking with dimethylol dicyandiamide (DMDCD). The product was characterized by FT-IR. The water resistance and storage stability of the crosslinking modification oxidized starch adhesive were also discussed. The results showed that DMDCD improves the water resistance and storage stability of oxidized starch adhesive; when the amount of ammonium persulfate is 1. 5% of corn starch by mass, the amount of DMDCD is 3% of corn starch by mass, the modified starch adhesive can keep for 45 days at room temperature, and its water resistance is 102 h and its viscosity is 1680 mPa·s. FT-IR spectrum indicated that DMDCD was crosslinked with oxidized starch.