Research in the field of biodegradable formulation has seen a huge upsurge owing to environmental concerns. Hence, fundamental shifting to fully bio-based material productions represents an essential task. In this context, the authors directed their efforts to synthesize fully bio-based waterborne polyesters by one-pot synthesis using vegetable oil-based dimer acid, glycerol, and citric acid via a solvent-free environmentally benign route. Three different compositions of the polyester were synthesized by varying the amount of citric acid and dimer acid by melt polycondensation without using any organic solvent. The physicochemical structure of the synthesized polyesters was characterized by Fourier transform infrared and NMR spectroscopies. Glycerol-based epoxy and fatty acid-based poly(amido amine) cured thermosets of the synthesized polyesters showed excellent performances including tensile strength (8.55–13.72 MPa), elongation at break (128.43–182.13%), toughness (12.95–17.31 MJ/m³), impact resistance (15.99 to >19.5 kJ/m), scratch hardness (8–10 kg), gloss value at 60° (56.2–62.3), and good thermal stability (above 203–230 °C). Moreover, the thermosets also showed good resistance against chemical and UV aging with high microbial biodegradability and controlled release ability toward urea as fertilizer. Thus, the synthesized fully bio-based polyester has potential applications as UV-resistant biodegradable sustainable material with controlled release attributes for fertilizers.

中文翻译：

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一锅合成生物基水性聚酯，具有控释特性，可作为抗紫外线的可生物降解的可持续材料

由于对环境的关注，可生物降解制剂领域的研究已经激增。因此，从根本上转向完全基于生物的材料生产是一项必不可少的任务。在这种情况下，作者指导他们的努力，是通过无溶剂环保良性途径，使用植物油基二聚酸，甘油和柠檬酸通过一锅法合成全生物基水性聚酯。通过在不使用任何有机溶剂的情况下通过熔融缩聚改变柠檬酸和二聚酸的量来合成三种不同的聚酯组成。合成聚酯的理化结构通过傅立叶变换红外光谱和核磁共振谱进行表征。³），抗冲击性（15.99至> 19.5 kJ / m），划痕硬度（8–10 kg），60°时的光泽度（56.2–62.3）和良好的热稳定性（高于203–230°C）。此外，热固性塑料还具有良好的抗化学和紫外线老化性能，并具有很高的微生物可生物降解性和对尿素作为肥料的控制释放能力。因此，合成的全生物基聚酯具有作为肥料的控释特性的抗紫外线可生物降解的可持续材料的潜在应用。