Plackett-Burman联合Box-Behnken试验优化柑橘皮渣吸水树脂的制备工艺

Optimization of Synthesis of Superabsorbent Resin based on Citrus Peel by Plackett Burman and Box-Behnken Designs

为实现柑橘皮渣资源化利用,以柑橘皮渣为原料,在超声辅助下,通过碱化、醚化和交联反应制备吸水树脂。在单因素试验基础上,采用Plackett-Burman试验筛选出高岭土用量、超声交联时间与NaOH质量分数为显著影响柑橘皮渣吸水树脂吸水倍率的因素;通过Box-Behnken Design响应面试验得到最佳工艺为:高岭土用量为0.07 g、超声交联时间为53 min、NaOH质量分数为35%,最佳工艺条件下柑橘皮渣吸水树脂的吸水倍率的试验值为63.65,与理论预测值65.05的相对误差为2.15%,差别不大。采用该方法优化出的柑橘皮渣吸水树脂的制备工艺稳定可靠,可为柑橘皮渣的综合利用提供参考。

In order to improve the resource utilization level of citrus peel,in this paper,citrus peel is used as raw material to prepare superabsorbent resin by alkalization,etherification and crosslinking reaction under ultrasonic conditions.The key factors affecting water absorption of the superabsorbent resin selected out by plackett-burman design on the basis of single-factor experiments were the dosage of kaolin,ultrasonic time of crosslinking reaction and sodium hydroxide dosage.The optimization synthesis condition was carried out by using Box-Behnken design.The results showed that the optimal synthesis condition was as follows:the dosage of kaolin 0.07 g,ultrasonic time of crosslinking reaction 53 min and concentration of NaOH solution 35%,under the optimum condition,the measured results of water absorption rate was 63.65 and its forecasting results 65.05.The relative error between the forecasting results and measured results is 2.15%.Optimization of synthesis of superabsorbent resin based on citrus peel by plackett burman and box-behnken designs was stability and reliability,which can provide reference for comprehensive utilization of citrus peel.