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Assessing the effect of PLA, cellulose microfibers and CaCO3 on the properties of starch-based foams using a factorial design
Polymer Testing ( IF 5.1 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.polymertesting.2020.106482
Nora M. Moo-Tun , G. Iñiguez-Covarrubias , A. Valadez-Gonzalez

Abstract The effect of polylactic acid (PLA), cellulose microfibers (CEL), and calcium carbonate (CaCO3) on the equilibrium moisture content (EMC), density and flexural mechanical properties of starch-based bio-foams was studied using a full factorial design 23. Also, a moisture aging study was carried out. The results show the three factors studied changed the bio-foams morphology, contribute to density increment, enhance dimensional stability and improve both the moisture resistance and the mechanical flexural properties. The moisture aging studies show that, although the flexural mechanical properties decrease with increasing humidity, the bio-foams exceed the mechanical properties of commercial expanded polystyrene (EPS) trays. These findings suggest the bio-composites could be used in regions where the humidity conditions are moderate to very humid, guaranteeing their dimensional stability and functional properties. Thus, these new bio-foams are an attractive and sustainable option to replace the non-biodegradable EPS commercial trays.

中文翻译:

使用因子设计评估 PLA、纤维素微纤维和 CaCO3 对淀粉基泡沫性能的影响

摘要 聚乳酸 (PLA)、纤维素微纤维 (CEL) 和碳酸钙 (CaCO3) 对淀粉基生物泡沫的平衡含水量 (EMC)、密度和弯曲力学性能的影响使用全因子设计进行研究。 23. 此外,还进行了水分老化研究。结果表明,所研究的三个因素改变了生物泡沫的形态,有助于密度增加,增强尺寸稳定性,并改善防潮性和机械弯曲性能。水分老化研究表明,虽然弯曲机械性能随着湿度的增加而降低,但生物泡沫超过了商用发泡聚苯乙烯 (EPS) 托盘的机械性能。这些发现表明,生物复合材料可用于湿度条件中等至非常潮湿的地区,确保其尺寸稳定性和功能特性。因此,这些新型生物泡沫是替代不可生物降解的 EPS 商用托盘的一种有吸引力且可持续的选择。
更新日期:2020-06-01
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