The effect of drying temperature on the characteristics of biodegradable plastic from Cassava pulp and Chitosan
Adina Widi Astuti, A. Yulianto, U. Nurbaiti
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引用次数: 1
Abstract
Conventional plastics made from polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polystyrene, and poly (ethylene terephthalate) are difficult to decompose. Bioplastics can reduce the amount of toxic waste generated from biological materials other than petroleum. The combination of cassava pulp and chitosan can be used as a candidate for the manufacture of biodegradable plastics. The optimal drying temperature can produce biodegradable plastics that have good quality. The method used to determine the effect is the mechanical properties test with ASTM D-638M standard and degradation test. The results of this study obtained 6 samples of biodegradable plastic with variations in temperature A=40˚C, B=50˚C, C=60˚C, D=70˚C, E=80˚C and F=90˚C. From the results of the mechanical properties test, the tensile strength values of each sample are A = 0,84 MPa, B = 1,78 MPa, C = 2,24 MPa, D = 1,58 MPa, E = 1,23 MPa and F =0,57 MPa. While the percent elongation value of each sample is A = 11,09%, B = 21,62%, C = 30,25%, D = 15,94%, E = 13% and F = 7,2%. The drying temperature in the process of making biodegradable plastics can affect its mechanical properties, namely the higher the drying temperature used, the lower the tensile strength value and the percent elongation, this is because high temperatures can damage the chemical structure and evaporated sorbitol which serves to increase flexibility. The higher the drying temperature also causes the biodegradable plastic to take longer to degrade. Sample A with the lowest temperature degraded the fastest for 28 days, while sample F with the highest temperature degraded the fastest for 46 days.©2021 JNSMR UIN Walisongo. All rights reserved.
干燥温度对木薯浆和壳聚糖生物降解塑料性能的影响
由聚乙烯(PE)、聚丙烯(PP)、聚氯乙烯(PVC)、聚苯乙烯和聚对苯二甲酸乙酯(聚对苯二甲酸乙酯)制成的传统塑料很难分解。生物塑料可以减少石油以外的生物材料产生的有毒废物的数量。木薯浆与壳聚糖的复合可作为制备生物降解塑料的候选材料。最佳干燥温度可以生产出质量良好的生物降解塑料。测定效果的方法是采用ASTM D-638M标准进行力学性能试验和降解试验。本研究的结果得到了6个温度变化的生物降解塑料样品A=40˚C, B=50˚C, C=60˚C, D=70˚C, E=80˚C, F=90˚C。从力学性能测试结果来看,各试样的抗拉强度值分别为A = 0.84 MPa、B = 1.78 MPa、C = 2.24 MPa、D = 1.58 MPa、E = 1.23 MPa、F = 0.57 MPa。各试样的伸长率分别为A = 11.09%, B = 21.62%, C = 30.25%, D = 15.94%, E = 13%, F = 7.2%。制备生物降解塑料过程中的干燥温度会影响其力学性能,即干燥温度越高,拉伸强度值和伸长率越低,这是因为高温会破坏化学结构并蒸发山梨醇,从而增加柔韧性。干燥温度越高,生物可降解塑料的降解时间也越长。温度最低的样品A降解速度最快,为28天,温度最高的样品F降解速度最快,为46天。©2021 JNSMR UIN Walisongo。版权所有。
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