
Box-Behnken法优化玉米全粉生物可降解片材的制备与性能
王宁, 侯瑞, 付嘉琪, 周博
Box-Behnken法优化玉米全粉生物可降解片材的制备与性能
Preparation and Performance of Biodegradable Corn Flour Sheets Optimized by Box-Behnken Method
以玉米全粉、增塑剂邻苯二甲酸二辛酯(DOP)、CO2树脂等为原料制作生物可降解片材,并优化其工艺条件。通过单因素确定研究增塑剂DOP添加量、CO2树脂和乙烯醋酸乙烯酯共聚物(EVA)的质量比、甘油、玉米全粉的添加对片材的断裂伸长率和撕裂强度影响较为显著。针对生物可降解片材影响较大的3个因素采用响应面Box-Behnken法进行分析,最终确定影响因素的次序为:甘油添加量>玉米全粉添加量>增塑剂DOP添加量。最佳工艺参数为玉米全粉添加量55 g、增塑剂DOP添加量2 mL、甘油添加量4 mL,此条件下所制得的生物可降解片材撕裂强度为3.456 N/mm,土埋90 d后生物可降解性能明显。
The article uses corn flour, plasticizer dioctyl phthalate (DOP), CO2 resin, and other materials to produce biodegradable sheet materials as a substitute for plastic, and optimizes the processing conditions. The addition of plasticizers DOP, the mass ratio of CO2 resin to ethylene vinyl acetate copolymer (EVA), as well as the addition of glycerol and corn flour, were studied through single factor determination, and their effects on the elongation at break and tear strength of the sheet were significant. The response surface Box-Behnken method was used to analyze the three factors that have a significant impact on biodegradable sheets. The final order of the influence factors was determined as follows: Glycerol addition>corn flour addition>plasticizer DOP addition. The optimal process parameters were 55 g corn flour addition, 2 mL plasticizer DOP addition, and 4 mL glycerol addition. Under these conditions, the tear strength of the biodegradable sheets produced was 3.456 N/mm, after 90 days of soil burial, the biodegradability performance was significant.
Whole corn flour / Biodegradable sheet / Elongation at break / Tear strength
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