白桦脂在乙醇-二甲基亚砜复合溶剂中溶解度的实验研究

Processes Pub Date : 2024-06-07 DOI:10.3390/pr12061179
G. Shambilova, Aigul S. Bukanova, Altynay S. Kalauova, D.Zh. Kalimanova, Amangeldi I. Abilkhairov, Igor S. Makarov, Markel I. Vinogradov, Georgy I. Makarov, Sergey A. Yakimov, Alexander V. Koksharov, Egor M. Novikov
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引用次数: 0

摘要

白桦脂及其衍生物具有抗菌、杀真菌和抗肿瘤的特性,是一种很有前途的天然有机物。白桦脂的粒径可达几十微米,厚度为几微米。加工白桦脂的方法多种多样,但最有前途的是溶液法(涂抹薄层、浸渍等)。使用白桦脂可以对各种材料进行涂敷或浸渍,但目前已知的溶剂无法获得必要含量的白桦脂溶液。由于目前已知的一些直接溶剂只能提供低浓度的白桦脂溶液,因此使用基于两种溶剂的复合系统可以成为解决问题的最佳方案。文献数据显示,使用混合溶剂可以制备均相溶液,例如纤维素等天然聚合物。这种获得溶液的方法已成为加工白桦脂的基础。首次提出使用乙醇和二甲基亚砜混合溶剂制备白桦脂溶液。研究了白桦脂在各组分比例为 50% 至 50% 的混合体系中的溶解度,并绘制了溶解度曲线。结果表明,使用双组分溶剂可以将 10%的白桦脂转移到溶液中,这几乎是已知溶剂的两倍。我们对所获得溶液的流变特性进行了研究。白桦脂溶液在复合溶剂中的粘度取决于其含量和温度,因此在 70 °C 时,7% 的溶液粘度约为 0.008 Pa*s。将白桦脂涂在纸板表面可增加其疏水性和排斥性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Experimental Study on the Solubility of Betulin in the Complex Solvent Ethanol-DMSO
Betulin is a promising natural organic substance due to its antibacterial, fungicidal, and antitumor properties, as are their derivatives. The particle size of betulin can reach several tens of micrometers, and its thickness is several microns. There are various ways of processing betulin, but the most promising are solution methods (applying thin layers, impregnation, etc.). Application or impregnation of various materials is carried out using betulin; however, currently known solvents do not allow obtaining solutions with the necessary content of it. Since a number of direct solvents are already known for betulin, which provides only low-concentration solutions, the use of complex systems based on two solvents can become the optimal solution to the problem. The literature data show that the use of mixtures of solvents allows for the preparation of homogeneous solutions, for example, for natural polymers like cellulose, etc. This approach to obtaining solutions has become the basis for the processing of betulin. The use of a mixed solvent based on ethanol and DMSO for the preparation of betulin solutions has been proposed for the first time. The solubility of betulin in a mixture system with a ratio of components of 50 wt.% to 50 wt.% was studied, and a solubility curve was plotted. It is shown that the use of a two-component solvent makes it possible to transfer up to 10% of betulin into solution, which is almost twice as much as compared to already known solvents. The rheological properties of the obtained solutions have been studied. The viscosity of betulin solutions in a complex solvent depends on its content and temperature, so for 7% solutions at 70 °C, it is approximately 0.008 Pa*s. Applying betulin to the surface of the cardboard increases its hydrophobic properties and repellency.
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