Dal Poggetto Giovanni, Di Maro Mattia, Gargiulo Luca, Duraccio Donatella, Santagata Gabriella, Gomez d'Ayala Giovanna
Institute of Polymers, Composites and Biomaterials (IPCB)-CNR, Via Campi Flegrei 34, 80078 Pozzuoli, Italy.
Institute of Sciences and Technologies for Sustainable Energy and Mobility (STEMS)-CNR, Strada Delle Cacce 73, 10135 Torino, Italy.
Polymers (Basel). 2025 May 16;17(10):1376. doi: 10.3390/polym17101376.
In this study, microwave-assisted extraction (MAE) was performed to recover antioxidant hemp seed oil (HSO) with the purpose of developing polybutylene succinate (PBS)/HSO-based films for active packaging to improve food shelf-life. It was found that MAE achieved comparable yields, structural characteristics, and antioxidant activity to Soxhlet extraction, but in significantly less time (2.5 min vs. 6 h). PBS-based films with 0.5 and 1 wt% HSO were prepared by compression molding. Morphological investigation of the PBS-HSO films highlighted uniform oil droplet dispersion and good compatibility. HSO reduced PBS crystallinity but did not affect the α-form of PBS. Thermal analysis showed reductions in T and T, whereas T remained unchanged at -17 °C. PBS containing 1 wt% HSO exhibited a 42% decrease in Young's modulus, 47% reduction in elongation at break, and 47% decrease in tensile strength due to the plasticizing effect of the oil and, which reduced the intermolecular forces and facilitated polymer chain disentanglement, in agreement with the FTIR analysis, which showed a distinct broadening of the carbonyl stretching region associated with the amorphous phase (1720-1730 cm) in the PBS-HSO films compared to neat PBS. Migration tests showed that the films are unsuitable for fatty foods but safe for aqueous, acidic, and alcoholic foods.
在本研究中，采用微波辅助萃取（MAE）来回收抗氧化大麻籽油（HSO），目的是开发基于聚丁二酸丁二醇酯（PBS）/HSO的活性包装薄膜，以延长食品保质期。结果发现，MAE在产量、结构特征和抗氧化活性方面与索氏提取相当，但所需时间显著缩短（2.5分钟对6小时）。通过压缩成型制备了含0.5 wt%和1 wt% HSO的PBS基薄膜。对PBS - HSO薄膜的形态学研究表明油滴分散均匀且相容性良好。HSO降低了PBS的结晶度，但不影响PBS的α晶型。热分析显示熔点和结晶温度降低，而玻璃化转变温度在 - 17°C保持不变。由于油的增塑作用，含1 wt% HSO的PBS的杨氏模量降低了42%，断裂伸长率降低了47%，拉伸强度降低了47%，这降低了分子间作用力并促进了聚合物链的解缠结，这与傅里叶变换红外光谱（FTIR）分析结果一致，该分析表明与纯PBS相比，PBS - HSO薄膜中与非晶相相关的羰基伸缩区域（1720 - 1730 cm）明显变宽。迁移试验表明，这些薄膜不适用于高脂肪食品，但对水性、酸性和酒精性食品是安全的。
