Martinaud Emma, Hierro-Iglesias Carmen, Hammerton James, Hadad Bawan, Evans Rob, Sacharczuk Jakub, Lester Daniel, Derry Matthew J, Topham Paul D, Fernandez-Castane Alfred
École Nationale Supérieure de Chimie, de Biologie et de Physique, Polytechnic Institute of Bordeaux, 33607 Pessac Cedex, France.
Energy and Bioproducts Research Institute, Aston University, Birmingham, B4 7ET UK.
J Polym Environ. 2024;32(8):3503-3515. doi: 10.1007/s10924-023-03167-4. Epub 2024 Jan 27.
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--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, through biotransformation. 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.
The online version contains supplementary material available at 10.1007/s10924-023-03167-4.
2019年全球生产的塑料约99%由石化行业生产，预计2023年至2050年期间塑料消费量可能会翻番。使用可生物降解的生物塑料是石油基塑料的一种替代解决方案。然而，生物聚合物的生产成本阻碍了它们在现实世界中的应用。将废弃生物质用作生物聚合物的主要碳源，可能实现生物塑料的经济高效生产，同时为碳中性和循环塑料经济的废物管理提供解决方案。在此，我们首次报告通过综合预处理和发酵工艺，随后对木薯皮废料（一种可再生的低成本底物）进行碱性消化，通过生物转化生产出摩尔比为2:1的3-羟基丁酸：3-羟基戊酸（3HB:3HV）的聚（3-羟基丁酸酯-3-羟基戊酸酯）（PHBV）。随后将PHBV与可生物降解聚合物聚己内酯（PCL）进行熔融共混，其中30:70（摩尔%）的PHBV:PCL共混物表现出优异的机械性能平衡，且降解温度高于单独的PHBV，从而提供了更高的稳定性和可控性能。这项工作代表了一种潜在的废物管理环境解决方案，既能使木薯加工行业（或其他作物加工行业）受益，又能开发可应用于例如包装和生物医学工程的新型生物塑料材料。
在线版本包含可在10.1007/s10924-023-03167-4获取的补充材料。
