骨胶及黄原胶的含量变化对一次性植物秸秆降解餐具力学性能的影响

Effect of content changes of bone glue and xanthan gum on mechanical properties of disposable vegetable fiber degradable tableware

目的针对骨胶和黄原胶含量变化时植物桔杆降解餐具力学性能的变化,分析和探讨骨胶和黄原胶对可降解植物纤维餐具的影响。方法将稻草秸秆粉碎后作为主要原料,同时加入淀粉、骨胶、黄原胶,并与稻草秸秆粉混合,再加入一定量滑石粉和去离子水热压成型制得植物桔杆可降解餐具。分别改变骨胶(3.5%~7.5%)和黄原胶(6.5%~14.5%)的添加量并制成100 mm?100 mm的试样,设置镖锤试验仪以0.5 mm/min的速度加载,记录板材破裂时的力学数据。结果在8 g黄原胶、l0 g滑石粉、15 g水、1.5 g硬脂酸的基础上,添加5.5%的骨胶力学性能最优,力学强度为43.6 N;而3.5 g骨胶、10 g滑石粉、15 g水、1.5 g硬脂酸的基础上添加12.5%的黄原胶力学性能最好,力学强度达到44.6N。结论添加一定量的骨胶和黄原胶可以提高植物桔杆降解餐具的力学性能,但只有在合理添加骨胶和黄原胶时才可以有效的增加一次性可降解植物纤维餐具的力学强度。

Objective To analyze and discuss the effects of bone glue and xanthan gum on the degradable vegetable fiber tableware, according to the change of mechanical properties of vegetable fiber degradable tableware with the content change of bone glue and xanthan gum. Methods Straw was crushed as the main raw material, starch, bone glue and xanthan gum were added at the same time, and then mixed with rice straw powder, then a certain amount of talcum powder and deionized water were added to form biodegradable tableware. After changing the amount of bone glue(3.5%-7.5%) and xanthan gum(6.5%-14.5%) respectively, the specimens of 100 mm? 100 mm were made, and the dart hammer tester was set up to load at the speed of 0.5 mm/min, and the mechanical data of the plate during fracture were recorded. Results On the basis of 8 g xanthan gum, 10 g talc powder, 15 g water and 1.5 g stearic acid, the mechanical properties of bone glue with 5.5% were the best, and the mechanical strength was 43.6 N;while the mechanical properties of xanthan gum added 12.5% on the basis of 3.5 g bone glue, 10 g talc powder, 15 g water and 1.5 g stearic acid was the best, and the mechanical strength reached 44.6 N. Conclusion Adding a certain amount of bone glue and xanthan gum can improve the mechanical properties of degradable vegetable fiber tableware, but only when bone glue and xanthan gum are reasonably added, the mechanical strength of disposable degradable vegetable fiber tableware can be effectively increased.