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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Preparation of nanoparticles of Magnolia bark extract by rapid expansion from supercritical solution into aqueous solutions
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Preparation of nanoparticles of Magnolia bark extract by rapid expansion from supercritical solution into aqueous solutions

机译：从超临界溶液到水溶液的快速膨胀制备木兰提取物的纳米粒子

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摘要

A rapid expansion from supercritical solution into aqueous solution (RESSAS) technology was presented for the micronization of Chinese medicinal material. Magnolia bark extract (MBE) obtained by supercritical carbon dioxide (scCO2) extraction technology was chosen as the experimental material. RESSAS process produced 303.0 nm nanoparticles (size distribution, 243.6-320.5 nm), which was significantly smaller than the 55.3 μm particles (size distribution, 8.3-102.4μm) prepared by conventional mechanical milling. The effect of process parameters, including extraction temperature (30°C, 40°C, 50°C), extraction pressure (200, 250, 300 bar) and nozzle size (50,100, 200 nm), on the size distribution of nanoparticles was investigated. The characteristics of nanoparticles and materials were also studied by scanning electron microscopy (SEM) and laser light scattering (LLS). This study demonstrates that RESSAS is applicable for preparing nanoparticles of MBE at low operating temperature; the process is simple without any residual solvent.
机译：提出了从超临界溶液到水溶液（RESSAS）技术的快速扩展，用于中药材的微粉化。实验采用超临界二氧化碳（scCO2）提取技术获得的木兰皮提取物（MBE）。 RESSAS工艺产生了303.0 nm的纳米粒子（尺寸分布为243.6-320.5 nm），该尺寸明显小于通过常规机械研磨制备的55.3μm的粒子（尺寸分布为8.3-102.4μm）。包括萃取温度（30°C，40°C，50°C），萃取压力（200、250、300 bar）和喷嘴尺寸（50,100，200 nm）在内的工艺参数对纳米颗粒的尺寸分布的影响为调查。还通过扫描电子显微镜（SEM）和激光散射（LLS）研究了纳米颗粒和材料的特性。这项研究表明，RESSAS适用于在低工作温度下制备MBE纳米颗粒。工艺简单，无残留溶剂。

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