芭蕉芋氧化淀粉的制备与性质

采用正交法考察了淀粉悬浮液浓度、过氧化氢与催化剂用量、反应温度和反应时间对芭蕉芋过氧化氢氧化淀粉中羧基含量的影响，并比较了相同氧化剂用量下次氯酸钠、高锰酸钾、过氧化氢氧化淀粉的羧基含量和黏度。结果表明，制备芭蕉芋过氧化氢氧化淀粉的最佳反应条件为pH=7，淀粉悬浮液浓度46％，过氧化氢12％，硫酸铜0．048％，反应时间3h，反应温度50℃，在此条件下，制备的氧化淀粉羧基含量可达0．92％；次氯酸钠氧化效率高于过氧化氢和高锰酸钾；低羧基含量时次氯酸钠氧化淀粉的黏度大于过氧化氢和高锰酸钾氧化淀粉。

Preparation and Properties of Oxidized Canna Starch

The effects of concentration of starch slurry,amount of hydrogen peroxide and the catalyst,reaction temperature and time on carboxyl content of oxidized canna starch were investigated by orthogonal experiments.The carboxyl content and viscosity of starches oxidized by sodium hypochlorite,potassium permanganate and hydrogen peroxide were compared at the same mass fraction.The results showed that the carboxyl content of the oxidized starch was the largest,as high as 0.92% under the conditions of pH 7,catalyst...