Wang Yaohui, Li Long, Cheng Gege, Li Lanfu, Liu Xiuyu, Huang Qin
School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China.
Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Nanning 530006, China.
Polymers (Basel). 2022 Jun 14;14(12):2398. doi: 10.3390/polym14122398.
The separation and extraction of chrysin from active ingredients of natural products are of great significance, but the existing separation and extraction methods have certain drawbacks. Here, chrysin molecularly imprinted nanofiber membranes (MINMs) were prepared by means of electrospinning using chrysin as a template and polyvinyl alcohol and natural renewable resource rosin ester as membrane materials, which were used for the separation of active components in the natural product. The MINM was examined using Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The adsorption performance, adsorption kinetics, adsorption selectivity, and reusability of the MINM were investigated in static adsorption experiments. The analysis results show that the MINM was successfully prepared with good morphology and thermal stability. The MINM has a good adsorption capacity for chrysin, showing fast adsorption kinetics, and the maximum adsorption capacity was 127.5 mg·g, conforming to the Langmuir isotherm model and pseudo-second-order kinetic model. In addition, the MINM exhibited good selectivity and excellent reusability. Therefore, the MINM proposed in this paper is a promising material for the adsorption and separation of chrysin.
从天然产物活性成分中分离提取白杨素具有重要意义，但现有分离提取方法存在一定缺陷。在此，以白杨素为模板，聚乙烯醇和天然可再生资源松香酯为膜材料，通过静电纺丝制备了白杨素分子印迹纳米纤维膜（MINM），用于天然产物中活性成分的分离。采用傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和热重分析（TGA）对MINM进行了表征。通过静态吸附实验研究了MINM的吸附性能、吸附动力学、吸附选择性和可重复使用性。分析结果表明，成功制备了具有良好形貌和热稳定性的MINM。MINM对白杨素具有良好的吸附能力，吸附动力学较快，最大吸附量为127.5 mg·g，符合朗缪尔等温线模型和准二级动力学模型。此外，MINM表现出良好的选择性和优异的可重复使用性。因此，本文提出的MINM是一种有前景的白杨素吸附分离材料。
