Properties of agar/cassava starch films manufactured by hot-melt extrusion method

IF 1.8 4区材料科学 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Green Materials Pub Date : 2023-06-16 DOI:10.1680/jgrma.23.00049

Shelly Faradina, Bakti Berlyanto Sedayu, Mokhamad Nur, Dina Fransiska, Firda Aulya Syamani

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引用次数: 0

Abstract

Agar/cassava starch bioplastic film preparation using the extrusion technique was carried out to obtain a continuous production method that is more applicable to industrial production practices. Various ratios (w/w) of agar-and-cassava-starch blends were used in the bioplastic film formulations with glycerol as the plasticizer. All the ingredients were compounded using a single-screw extruder at 110°C. The extrudates were dried and chopped into bioplastic resin pellets, followed by hot compression into a film sheet. The bioplastic film samples were tested for their mechanical properties, water sensitivity, biodegradability and chemical structures. In general, the amount of agar in film formulations was prominently associated with superior mechanical properties, such as the tensile strength, elongation at break and water resistance of the samples. On the other hand, cassava starch contributed to faster film degradation in soil and water. These results, in general, could be explained by the inherent properties of each biopolymer constituent and the number of hydroxyl groups (OH) in the chemical structure of each film sample, which was observed by Fourier transform infrared spectroscopy. This investigation showed that agar/cassava starch bioplastic production using the hot-melt extrusion method was promising for further implementation on a commercial production scale.

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热熔挤压法制备琼脂/木薯淀粉薄膜的性能研究

利用挤出技术制备琼脂/木薯淀粉生物塑料薄膜，获得了一种更适用于工业生产实践的连续生产方法。以甘油为增塑剂，采用不同比例的琼脂和木薯淀粉共混物制备生物塑料薄膜。所有成分在110°C下使用单螺杆挤出机进行复合。将挤出物干燥并切碎成生物塑料树脂颗粒，然后热压缩成薄膜。对生物塑料薄膜样品的力学性能、水敏感性、生物降解性和化学结构进行了测试。一般来说，琼脂在薄膜配方中的用量与优异的机械性能显著相关，如拉伸强度、断裂伸长率和样品的耐水性。另一方面，木薯淀粉有助于更快的膜在土壤和水的降解。总的来说，这些结果可以用傅里叶变换红外光谱观察到的每个生物聚合物成分的固有性质和每个膜样品化学结构中羟基(OH)的数量来解释。本研究表明，利用热熔挤压法生产琼脂/木薯淀粉生物塑料有望进一步实现商业化生产规模。

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来源期刊

Green Materials Environmental Science-Pollution

CiteScore

3.50

自引率

15.80%

发文量

期刊介绍： The focus of Green Materials relates to polymers and materials, with an emphasis on reducing the use of hazardous substances in the design, manufacture and application of products.