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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Creation of regenerated cellulose microspheres with diameter ranging from micron to millimeter for chromatography applications
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Creation of regenerated cellulose microspheres with diameter ranging from micron to millimeter for chromatography applications

机译：为色谱应用创建直径范围从微米到毫米的再生纤维素微球

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摘要

Regenerated cellulose microspheres (RCM) with different diameters were prepared from cellulose solution using 7. wt% NaOH/12. wt% urea aqueous solvent pre-cooled to -12 °C by the sol-gel transition method via a " green" process. By varying the hydrophile-lipophile balance, the amount of the surfactants, the proportion of the water to the oil phase and the stirring speed, the mean diameter of the cellulose microsphere with nano-scale pore size could be controlled easily from 5 μm to 1. mm. The structure and physicochemical properties of the microspheres were characterized by FT-IR spectroscopy, scanning electron microscopy, X-ray diffraction, mercury intrusion-porosimetry and particle size analyzer. The RCM microspheres exhibited spherical shape with the cellulose II structure. A preparative size-exclusion chromatography (SEC) column packed with the cellulose microspheres was used for the fractionation of a polyethylene oxide (PEO) in water, which indicated high efficiency for the fractionations and a large daily throughput of 4. g. Moreover, they had good adsorption capacity to dye particles through physical interaction. The cellulose microspheres would have potential applications in the fields of purification, separation and fractionation of polymers as chromatography packing and adsorbent both at laboratory and industrial scale.
机译：使用7. wt％NaOH / 12从纤维素溶液制备具有不同直径的再生纤维素微球（RCM）。重量％的尿素水溶剂通过“绿色”工艺通过溶胶-凝胶转变法预冷至-12°C。通过改变亲水亲脂平衡，可以轻松地将表面活性剂的量，水在油相中的比例以及搅拌速度，具有纳米级孔径的纤维素微球的平均直径控制在5μm至1毫米通过FT-IR光谱，扫描电子显微镜，X射线衍射，压汞法和粒度分析仪对微球的结构和理化性质进行了表征。 RCM微球呈具有纤维素II结构的球形。装有纤维素微球的制备型尺寸排阻色谱（SEC）色谱柱用于分馏水中的聚环氧乙烷（PEO），这表明分馏效率高，日通量高达4 g。而且，它们通过物理相互作用对染料颗粒具有良好的吸附能力。纤维素微球在实验室和工业规模上作为色谱填料和吸附剂在聚合物的纯化，分离和分馏领域中将具有潜在的应用。

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