催化氧化木薯淀粉的结构与胶粘性能

考察了催化剂硫酸亚铁对氧化木薯淀粉的绝对分子量及其分布、羧基和羰基含量以及其胶粘性能的影响。结果表明,催化氧化使木薯淀粉的氧化降解时间减少到0.5 h,羧基和羰基含量分别增加了105%和12%以上。用高效凝胶渗透色谱与多角度激光光散射仪联用技术分析氧化淀粉的结果表明,催化氧化淀粉的绝对分子量比无催化氧化淀粉的小,且分布均匀。由催化氧化淀粉制得的淀粉胶粘剂的固含量达28.9%,干燥15 m in时粘接强度达57 N。

Structure and Adhesive Properties of Oxidized Cassawa Starch

Effects of catalyst FeSO_(4) on molecular mass distribution,contents of carboxyl and carbonyl groups,and adhesive properties of the oxidized starches were investigated.The results show that the catalyst reduced the oxidation time of cassawa starch to 0.5 h,and increased the carboxyl and carbonyl contents in the oxidized starches by more than 105% and 12%,respectively.Gel Permeation Chromatography analysis showed that the molecular mass of the oxidized starch prepared with the catalyst was smaller,and the molecular mass distri-(bution) was more uniform than that of the starches(oxidized) without a catalyst.The solid content of the adhesive prepared by catalytically oxidized starch was as high as 28.9%.The adhesive strength of the adhesive was(57 N) after drying for 15 min.