阳离子交换树脂催化水解制备纳米纤维素工艺条件的响应面优化

Optimization of Cation Exchange Resin Catalytic Hydrolysis of Nanocellulose Crystal Using Response Surface Mehtodology

采用阳离子交换树脂催化水解制备纳米纤维素,并运用响应面分析法对影响纳米纤维素得率的3个主要影响因素即时间、温度和催化剂比例进行优化.通过建立数学模型的方式对各因素及其相互之间的交互作用进行了分析.研究表明:温度与时间、催化剂比例之间的关系比较接近二次多项式模型,模型校正决定系数为95.92%,相关系数为98.22%.催化剂比例与反应温度的交互作用不显著,催化剂比例与反应时间交互作用较不显著,而反应温度与时间具有较好的交互作用.经优化其最佳工艺条件为:时间为180 min、温度为45℃、催化剂比例为9∶1(质量比),纳米纤维素的得率为50.03%,与理论预测值(50.12%)较好吻合.表明模型是合理有效的.

Nanocellulose crystal was prepared by cation exchange resin catalytic hydrolysis. The three main influencing factors of the yield of nanocellulose crystal, time, temperature and the ratio of activator were optimized by response surface methodology. The establishment of mathematical model of each factor and its interaction be-tween each other were analyzed. The results showed： the relationship between temperature and time, catalyst ratio was close to the two polynomial model, the model correction coefficient was 95. 92% , and the model correlation coefficent was 98.22% . The interactions between the ratio of activator and temperature weret significant,and the interactions between temperature and time were significant. The optimum technological conditions by optimized were ： the time was 180 min, the temperature was 45 °C ,the ratio of activator was 9：1 ,and the yield of nanocellu-lose crystal was 50. 03% . The results agreed with the theoretical Predicition well, which showed that the medel was reasenable and effective.