College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
Molecules. 2021 Oct 28;26(21):6526. doi: 10.3390/molecules26216526.
Supramolecular hydrogels have attracted great attention due to their special properties. In this research, bio-based supramolecular hydrogels were conveniently constructed by heating and ultrasounding two components of dehydroabietic acid with a rigid tricyclic hydrophenanthrene skeleton and morpholine. The microstructures and properties of hydrogels were investigated by DSC, rheology, SAXS, CD spectroscopy, and cryo-TEM, respectively. The critical gel concentration (CGC) of the hydrogel was 0.3 mol·L and the gel temperature was 115 °C. In addition, the hydrogel showed good stability and mechanical properties according to rheology results. Cryo-TEM images reveal that the microstructure of hydrogel is fibrous meshes; its corresponding mechanism has been studied using FT-IR spectra. Additionally, oil-in-water gel emulsions were prepared by the hydrogel at a concentration above its CGC, and the oil mass fraction of the oil-in-water gel emulsions could be freely adjusted between 5% and 70%. This work provides a convenient way to prepare bio-based supramolecular hydrogels and provides a new method for the application of rosin.
由于具有特殊性质，超分子水凝胶引起了广泛关注。在这项研究中，通过加热和超声两种成分（具有刚性三环氢化菲骨架和吗啉的脱氢枞酸），方便地构建了基于生物的超分子水凝胶。通过 DSC、流变学、小角 X 射线散射、圆二色光谱和冷冻透射电镜分别研究了水凝胶的微观结构和性能。水凝胶的临界凝胶浓度（CGC）为 0.3 mol·L，凝胶温度为 115°C。此外，根据流变学结果，水凝胶显示出良好的稳定性和机械性能。冷冻透射电镜图像显示水凝胶的微观结构为纤维状网格；使用傅里叶变换红外光谱研究了其相应的形成机制。此外，在水凝胶浓度高于其 CGC 时可以制备油包水乳状液，油包水乳状液的油质量分数可以在 5%至 70%之间自由调节。这项工作为制备基于生物的超分子水凝胶提供了一种简便的方法，并为松香的应用提供了一种新方法。
