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以优化红稗多糖提取工艺并研究红稗多糖溶液流变学特性为研究目的。方法:以红稗多糖提取率为响应值,选定4因素(超声时间、料液比、水提时间、水提温度),根据中心组合(BoxBenhnken)试验设计原理采用4因素3水平的响应面分析法;通过测定不同条件处理下红稗多糖的黏度变化,对红稗多糖的流变性进行研究。试验结果表明:超声辅助提取红稗多糖最优条件为超声时间25 min、料液比1:38 mg/m L、水提温度80℃、水提时间1.7 h,试验结果多糖实际提取率为23.82%;红稗多糖黏度随温度的升高,热处理时间增加,Vc、H_2O_2和金属离子(Na~+、Ca~(2+)、Al~(3+))添加量的增加而下降,随红稗多糖浓度的增大而升高,在强酸或强碱条件下,黏度下降。
In order to optimize the extraction process of polysaccharides from Barnyardgrass and to study the rheological properties of polysaccharides from Barnyardgrass Methods: According to the design principle of Boxenhnken experiment, 4 factors and 3 levels of response surface were selected according to the extraction rate of polysaccharides of Erythromyces cerevisiae. Four factors (ultrasonic time, ratio of solid to liquid, water extraction time, water extraction temperature) Analytical method; Through the determination of different conditions under the viscosity of the red alhna polysaccharide changes, the red alder polysaccharide rheological properties. The results showed that the optimum conditions of ultrasound-assisted extraction of polysaccharides were as follows: ultrasonic time 25 min, solid-liquid ratio 1:38 mg / m L, water extraction temperature 80 ℃ and water extraction time 1.7 h. The actual extraction rate of polysaccharides was 23.82 %. The viscosity of the polysaccharide of Echinochloa crusgalli decreased with the increase of temperature, the time of heat treatment, the addition of Vc, H_2O_2 and metal ions (Na ~ +, Ca ~ (2 +), Al ~ (3+) Elymus polysaccharide concentration increased and increased in strong acid or alkali conditions, the viscosity decreased.