摘要
本文探讨了催化剂的种类、次氯酸钠的用量和反应时间对芭蕉芋淀粉氧化反应的影响。结果表明:氧化淀粉中的羧基随次氯酸钠的用量和反应时间的增加而增加,但粘度不断下降。有效氯为2%时,淀粉中羰基含量最高。使用催化剂A可制备羧基和羰基含量都较大的氧化淀粉,使用KI则可制备羧基少而羰基含量高的氧化淀粉。
The effects of kinds of catalysts, amounts of sodium hypochlorite and reaction time on oxidation of the Canna starch were investigated.The results show that the contents of carboxyl groups in oxidized starches increased with the increase of the charge of sodium hypochlorite and the reaction time,but the viscosity of the starches decreased.The contents of carbonyl groups in the starches were maximum at the concentration(2%) of effective chlorine.The starches with high carboxyl and carbonyl contents were obtained using catalyst A and low carboxyl but high carbonyl contents could be prepared using KI.
出处
《造纸科学与技术》
2005年第2期13-15,共3页
Paper Science & Technology
基金
福建省自然科学基金项目E0310017
