用稻壳制成的可生物降解容器替代一次性塑料制品

Nhung T. Tuyet Hoang, Anh Thi-Kim Tran
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引用次数: 0

摘要

越南是一次性塑料废弃物(SUP)最多的四个国家之一,仅次于中国、印度尼西亚和菲律宾。水稻种植过程中产生的大量副产品稻壳(RH)为制造可生物降解的容器提供了机会,有可能取代一次性用品。本研究的重点是通过热压法利用稻壳制造可生物降解容器。利用田口正交阵列法,我们考察了 RH 与变性淀粉 (MS) 的比例(重量百分比)、压制温度(°C)和时间(分钟)对托盘硬度、颜色变化和密度的影响,旨在完善生产工艺。此外,还评估了粘合剂浓度和甘油的变化对上述特性的影响。经确定,制造可行的生物可降解容器的最佳条件是相对湿度和 MS 成分均为 80%(重量比),150°C 下的压制时间为 3 分钟。所得产品的硬度为 5.26±0.22 kgF。此外,正面和背面的厚度、密度和颜色分别为 2.05±0.01 mm、0.97±0.004 g/cm³、50.87±0.96 和 48.05±0.87。因此,基于 RH 的材料已成为制作对消费者安全、对环境无害的可生物降解容器的理想候选材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biodegradable containers from rice husk as substitutes for single-use plastic products
Vietnam ranks among the top four nations for single-use plastic (SUP) waste, trailing only China, Indonesia, and Philippines. The abundant rice husk (RH) by-product of rice cultivation presents an opportunity to fabricate biodegradable containers, potentially supplanting single-use disposables. This study focuses on creating biodegradable containers from RH via thermo-pressing. Utilising the Taguchi orthogonal array method, we examined the impact of the RH to modified starch (MS) ratio (w/w %), pressing temperature (°C), and time (minutes) on the trays’ hardness, colour variation, and density, aiming to refine the manufacturing process. Additionally, variations in adhesive concentrations and glycerol were assessed for their influence on the aforementioned properties. The identified optimal conditions for fabricating viable biodegradable containers were a RH and MS composition of 80% (w/w), with a pressing duration of 3 minutes at 150°C. The resulting product exhibited a hardness of 5.26±0.22 kgF. Moreover, the thickness, density, and colour on the front and back sides were measured at 2.05±0.01 mm, 0.97±0.004 g/cm³, 50.87±0.96, and 48.05±0.87, respectively. Consequently, RH-based materials have emerged as promising candidates for crafting consumer-safe, environmentally benign biodegradable containers.
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