在受控堆肥条件下的生物降解过程中,粉柔性薄膜和纤维素半刚性托盘的热和结构变化
Jhon Jairo Palechor-Tróchez1, Héctor Samuel Villada Castillo1, Liliana Serna-Cock2
1Departamento de Agroindustria, Facultad de Ciencias Agrarias, Universidad del Cauca, 190002 Popayán, Colombia.
International journal of biological macromolecules
|August 9, 2024
概括
来自麻粉和纤维素的可生物降解塑料显示出高的生物降解率. 柔性薄膜实现了98.24%的降解,表明了一个有希望的环保替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 生物技术是生物技术.
背景情况:
- 生物聚合物为传统塑料提供了可持续的替代品,减少了对环境的影响.
- 评估生物降解对于验证生物塑料的环保性至关重要.
- 基于木的材料正在成为可行的生物聚合物来源.
研究的目的:
- 为了评估两个生物塑料的生物降解百分比:麻粉-Poly (乳酸) 柔性薄膜和麻粉-纤维素固体纤维半刚托盘.
- 分析生物降解过程中的热,形态和结构变化.
- 确定这些生物聚合物作为环保材料的有效性.
主要方法:
- 根据ISO 4855-1标准进行四周的生物降解测试.
- 在58°C±2°C的温度下进行化,使用成熟的堆肥注射剂,以每小时250毫升的恒定流量.
- 通过扫描电子显微镜 (SEM) 分析二氧化碳的演变,热特性 (Tg,Tm,Hm) 和形态变化.
主要成果:
- 麻粉-PLA柔性薄膜实现了98.24%的生物降解率.
- 由麻粉-纤维素固体纤维组成的半刚性托盘显示89.06%的生物降解.
- 微晶纤维素呈现了81.37%的生物降解.
- SEM证实了微生物殖民和表面退化.
结论:
- 基于木的生物聚合物显示出显著的生物降解潜力.
- 与半刚性托盘相比,柔性薄膜具有更高的生物降解性.
- 这些发现支持使用这些生物聚合物作为传统塑料的可持续替代品.
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