The objective of this study is to investigate the effects of three different organogelators, sorbitan monostearate (SMS), soya lecithin (SL) and glyceryl monostearate (GMS) prepared at different concentrations (12%, 15% and 18%, w/w) on the structural, thermal and mechanical properties of palm olein (PO)-based organogels. Polarized light microscopy analysis revealed needle-like crystals in SMS-PO, rod-shaped tubules in SL-PO and rosette-like aggregates in GMS-PO organogels. Intermolecular hydrogen bonding and van der Waals forces were the main drivers for the self-aggregation of these organogelators in PO, as observed in Fourier transform infrared (FTIR) spectroscopy. X-ray diffraction (XRD) results indicated β’-type polymorphic structure in SL-PO and GMS-PO. As the concentration of organogelators increased, there was a corresponding increase in the firmness, gel-sol transition (T_gs) and melting temperatures of the organogels. SMS-PO with amorphous structure had the lowest firmness, thus produced weaker gel with lower thermal stability. The oil binding capacity (OBC) of both SL-PO and GMS-PO were over 90%, significantly higher than that of SMS-PO organogels. These findings indicate that crystallization is the key determinant factor to the final properties of the organogel networks. This is influenced by the molecular structure and the concentration of the organogelators used.

中文翻译：

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大豆卵磷脂，山梨聚糖和单硬脂酸甘油酯对有机糖理化性质的影响

这项研究的目的是研究以不同浓度（12％，15％和18％，w / w）制备的三种不同的有机胶凝剂，脱水山梨糖醇单硬脂酸酯（SMS），大豆卵磷脂（SL）和单硬脂酸甘油酯（GMS）的作用。棕榈油精（PO）基有机凝胶的结构，热和机械性能 偏光显微镜分析显示，SMS-PO中呈针状晶体，SL-PO中呈杆状小管，GMS-PO有机凝胶中呈玫瑰状聚集体。分子间氢键和范德华力是这些有机胶凝剂在PO中自聚集的主要驱动力，如在傅立叶变换红外（FTIR）光谱中观察到的。X射线衍射（XRD）结果表明SL-PO和GMS-PO中的β'型多态性结构。随着有机胶凝剂浓度的增加，T _gs）和有机凝胶的熔融温度。具有非晶结构的SMS-PO具有最低的硬度，因此产生较弱的凝胶，具有较低的热稳定性。SL-PO和GMS-PO的油结合能力（OBC）均超过90％，显着高于SMS-PO有机凝胶。这些发现表明结晶是决定有机凝胶网络最终性能的关键因素。这受所用有机胶凝剂的分子结构和浓度的影响。