Coffee waste, commonly referred to as spent coffee grounds (SCG), is currently discarded and has a negative impact on the environment. However, SCG are rich in valuable ingredients including 15–20% oil, which has a profile comparable to the vegetable oils used in the production of epoxides, biobased polyols, and polymers. Our first objective was to evaluate the efficiency of three different methods, namely Soxhlet, pressurized fluid extraction, and supercritical CO₂ (scCO₂) on SCG oil extraction. Additionally, we aimed to test the potential of low-field (LF) NMR to analyze SCG oil and monitor the formation of epoxides and biobased polyols. Finally, we evaluated epoxidized SCG oil as a plasticizer for improving the properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) bioplastic. Overall, SCG showed a promising potential as a source of biopolymer precursors, while LF NMR can be an efficient and economic tool for oil evaluation and reaction monitoring.

咖啡废料，通常称为废咖啡渣 (SCG)，目前被丢弃，对环境产生负面影响。然而，SCG 富含有价值的成分，包括 15-20% 的油，其特性可与用于生产环氧化物、生物基多元醇和聚合物的植物油相媲美。我们的第一个目标是评估三种不同方法的效率，即索氏提取法、加压流体萃取法和超临界 CO ₂ (scCO ₂) 关于 SCG 石油开采。此外，我们旨在测试低场 (LF) NMR 分析 SCG 油和监测环氧化物和生物基多元醇形成的潜力。最后，我们评估了环氧化 SCG 油作为增塑剂用于改善聚 (3-羟基丁酸酯-co-3-羟基戊酸酯) (PHBV) 生物塑料的性能。总体而言，SCG 显示出作为生物聚合物前体来源的巨大潜力，而 LF NMR 可以成为石油评估和反应监测的有效且经济的工具。