Valorising Cassava Peel Waste Into Plasticized Polyhydroxyalkanoates Blended with Polycaprolactone with Controllable Thermal and Mechanical Properties
Valorising Cassava Peel Waste Into Plasticized Polyhydroxyalkanoates Blended with Polycaprolactone with Controllable Thermal and Mechanical Properties
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DOI：
10.1007/s10924-023-03167-4
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发表时间：
2024-01-27
影响因子：
5.3
通讯作者：
Fernandez-Castane，Alfred
中科院分区：
文献类型：
--
作者：
Martinaud，Emma;Hierro-Iglesias，Carmen;Fernandez-Castane，Alfred
2019年，全球约99%的塑料由石化行业生产，预计2023年至2050年塑料消费量可能翻一番。可生物降解的生物塑料的使用代表了石油基塑料的替代解决方案。然而，生物聚合物的生产成本阻碍了它们的实际应用。使用废弃生物质作为生物聚合物的主要碳源可以实现生物塑料的成本效益生产，同时为废物管理提供解决方案，以实现碳中和和循环塑料经济。在这里，我们首次报告了通过集成的预处理和发酵工艺生产3-羟基丁酸酯：3-羟基戊酸酯（3 HB：3 HV）摩尔比控制为2：1的聚（羟基丁酸酯-羟基戊酸酯）（PHBV）。通过杀虫铜生物转化，对木薯皮废物（一种可再生的低成本底物）进行碱消化。随后将PHBV与可生物降解的聚合物聚己内酯（PCL）熔融共混，其中30：70（摩尔%）的PHBV：PCL共混物表现出比单独的PHBV更高的降解温度和机械性能的优异平衡，从而提供增强的稳定性和可控性能。这项工作代表了废物管理的潜在环境解决方案，可以使木薯加工行业（或其他农作物加工行业）受益，同时开发可应用于包装和生物医学工程等的新型生物塑料材料。图形摘要
Approximately 99% of plastics produced worldwide were produced by the petrochemical industry in 2019 and it is predicted that plastic consumption may double between 2023 and 2050. The use of biodegradable bioplastics represents an alternative solution to petroleum-based plastics. However, the production cost of biopolymers hinders their real-world use. The use of waste biomass as a primary carbon source for biopolymers may enable a cost-effective production of bioplastics whilst providing a solution to waste management towards a carbon–neutral and circular plastics economy. Here, we report for the first time the production of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) with a controlled molar ratio of 2:1 3-hydroxybutyrate:3-hydroxvalerate (3HB:3HV) through an integrated pre-treatment and fermentation process followed by alkaline digestion of cassava peel waste, a renewable low-cost substrate, throughCupriavidus necatorbiotransformation. PHBV was subsequently melt blended with a biodegradable polymer, polycaprolactone (PCL), whereby the 30:70 (mol%) PHBV:PCL blend exhibited an excellent balance of mechanical properties and higher degradation temperatures than PHBV alone, thus providing enhanced stability and controllable properties. This work represents a potential environmental solution to waste management that can benefit cassava processing industries (or other crop processing industries) whilst developing new bioplastic materials that can be applied, for example, to packaging and biomedical engineering.Graphical Abstract