纤维/淀粉复合处理对生物质缓冲包装材料性能的影响

Effect of fiber/starch compound treatment on mechanical properties of biomass cushion packaging material

优良的成型状态及微观结构可以有效提高生物质纤维淀粉基包装材料的综合物理性能,为进一步提高材料物理使用性能,降低加工难度,对其主要原材料中的稻草纤维进行洗水、碱化处理,淀粉进行综合塑化处理。针对不同的处理组合进行了发泡成型实验以及相应材料制品的抗压强度、拉伸强度、静态压缩性能测试实验,根据实验数据对纤维、淀粉的最佳处理水平进行了定量分析:材料的抗压(拉伸)强度随着纤维碱处理程度的上升先增大后减小,最佳纤维碱处理为碱溶液浓度8%浸泡4h(6%-4h),最佳塑化剂浓度为8%(质量分数)的甘油、乙二醇混合塑化剂。最后,结合SEM图像分析了纤维处理/淀粉塑化对生物质缓冲包装材料微观结构及物理性能的影响机理。

Excellent state of material molding and microstructure can enhance the physical properties of biomass packaging material based fiber and starch efficiently.Therefore,the main raw materials were further processed in this study and processing technologies were improved accordingly.Corn starch was plasticized by ethylene glycol and glycerol.Straw fiber was further processed through washing with water and alkaline treatment. Foam molding tests were conducted according to the different treatment combinations,so were the tests of stat-ic compression,tensile properties and packages stacking.The results of quantitative analysis showed that the treated materials had a more notable influence on the comprehensive performance.The optimum processing technology about raw materials corresponding to specific mechanical property was obtained according to the tests analysis.Through SEM analysis,the influence mechanism of starch,fiber processing on the micro-struc-ture of material and outer physical and chemical properties were also studied.