摘要
Abstract
Porous starch is a modified hollow starch. It can be produced by hydrolyzing raw starch with enzymes at the temperature lower than starch gelatinization. It is widely used as a sorbent in many industries such as food, medicine, agriculture, cosmetics paper making due to its high efficiency, no toxicity and safety. In the conditions of ultrasonic collaborate with microwave, the traditional method of enzyme hydrolysis com starch was improved. The single factor and orthogonal experiment Llg (3 ) were designed to investigate the influence of temperature, time, as well as ultrasonic power to oil absorption rate. The results show that the best absorption rate was under the condition of; microwave power 150 W, ultrasonic power 400 W, temperature 561 and reaction time 45 min, a -amylase enzyme 8 U/g, glucoamy-lase and a - amylase ratio 6:1, citric acid buffer liquid pH 5.4. SEM verified honeycomb like structure and abundance surface hole with uniformed hole density. The diameter of the hole was very small but moderate. The surface area was increased and the granules were all kept well.关键词
超声波/微波/双酶联用/多孔淀粉Key words
ultrasonic/ microwave/ double enzyme coupled/ porous starch分类
轻工纺织
