Li Long, Liu Xiuyu, Li Lanfu, Wei Sentao, 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 May 26;14(11):2161. doi: 10.3390/polym14112161.
In this work, rosin-based composite membranes (RCMs) were developed as selective sorbents for the preparation of dencichine for the first time. The rosin-based polymer microspheres (RPMs) were synthesized using 4-ethylpyridine as a functional monomer and ethylene glycol maleic rosinate acrylate as a crosslinking. RCMs were prepared by spinning the RPMs onto the membranes by electrostatic spinning technology. The optimization of various parameters that affect RCMs was carried out, such as the ratio concentration and voltage intensity of electrospinning membrane. The RCMs were characterized by SEM, TGA and FT-IR. The performances of RCMs were assessed, which included adsorption isotherms, selective recognition and adsorption kinetics. The adsorption of dencichine on RCMs followed pseudo-second-order and adapted Langmuir-Freundlich isotherm model. As for the RCMs, the fast adsorption stage appeared within the first 45 min, and the experimental maximum adsorption capacity was 1.056 mg/g, which is much higher than the previous dencichine adsorbents reported in the literature. The initial decomposition temperature of RCMs is 297 °C, the tensile strength is 2.15 MPa and the elongation at break is 215.1%. The RCMs have good thermal stability and mechanical properties. These results indicated that RCMs are a tremendously promising adsorbent for enriching and purifying dencichine from the notoginseng extracts.
在本研究中，首次开发了基于松香的复合膜（RCMs）作为制备三七素的选择性吸附剂。以4-乙基吡啶为功能单体，乙二醇马来松香酸丙烯酸酯为交联剂合成了基于松香的聚合物微球（RPMs）。通过静电纺丝技术将RPMs纺丝到膜上制备RCMs。对影响RCMs的各种参数进行了优化，如静电纺丝膜的比例浓度和电压强度。通过扫描电子显微镜（SEM）、热重分析（TGA）和傅里叶变换红外光谱（FT-IR）对RCMs进行了表征。评估了RCMs的性能，包括吸附等温线、选择性识别和吸附动力学。三七素在RCMs上的吸附遵循准二级动力学，并符合Langmuir-Freundlich等温线模型。对于RCMs，快速吸附阶段出现在前45分钟内，实验最大吸附容量为1.056 mg/g，远高于文献报道的以往三七素吸附剂。RCMs的初始分解温度为297℃，拉伸强度为2.15 MPa，断裂伸长率为215.1%。RCMs具有良好的热稳定性和机械性能。这些结果表明，RCMs是从三七提取物中富集和纯化三七素极具前景的吸附剂。
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