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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of Natural Cellulose Microspheres via Electrospraying from NaOH/Urea Aqueous System
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Fabrication of Natural Cellulose Microspheres via Electrospraying from NaOH/Urea Aqueous System

机译：NaOH /尿素水溶液电喷雾制备天然纤维素微球

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摘要

Regenerated cellulose microspheres (RCM) with controllable sizes and architectures are prepared via electrospraying from environmental-friendly NaOH/Urea aqueous system. The particle size and shape of RCM is mainly dependent on the interplay among the electrical force, surface tension, and viscous force. Particle size can be reduced to a certain extent by increasing voltage and decreasing surface tension, electrode spacing, solution concentration, degree of polymerization, and flow rate. The deformation of droplets, which is peculiarly prone to occur for low viscosity and long electrode spacing, results in elongated spheres, tear-shaped particles, wedge-shaped particles, and banding shaped particles besides micorspheres. The sophericity and uniformity of particles generally become worse as a result of the deformation of droplets. RCM possess good porosity and large specific surface area after regeneration.
机译：通过对环境友好的NaOH /尿素水系统进行电喷雾制备尺寸和结构可控的再生纤维素微球（RCM）。 RCM的粒径和形状主要取决于电场力，表面张力和粘性力之间的相互作用。通过增加电压和降低表面张力，电极间距，溶液浓度，聚合度和流速，可以在一定程度上减小粒度。由于粘度低和电极间距长，液滴的变形特别容易发生，除了微球以外，还会导致球体变长，撕裂状的颗粒，楔形的颗粒和带状的颗粒。由于液滴变形，颗粒的球形度和均匀性通常变差。再生后RCM具有良好的孔隙率和较大的比表面积。

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