Influence of Polymeric Suspension Characteristics on the Particle Coating in a Spouted Bed
Influence of Polymeric Suspension Characteristics on the Particle Coating in a Spouted Bed
复制标题
聚合物悬浮特性对喷动床颗粒涂层的影响
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Flávia Bartholomeu
中科院分区：
文献类型：
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作者：
M. W. Donida;S. Rocha;Flávia Bartholomeu
摘要 介绍了传统喷射床中包衣悬浮液和颗粒特性对包衣过程的影响。在实验室规模的喷动床中，在固定的操作条件下用不同配方的水性聚合物涂层悬浮液对玻璃珠进行涂层。通过涂层悬浮液的接触角和表面张力来量化液体对固体的润湿性。包衣效率和颗粒生长与包衣悬浮液对固体颗粒的粘附力相关，这是固体和液体特性的函数。测定了涂覆颗粒的物理特性——颗粒平均直径、球形度、体积、绝对密度和表观密度、孔隙率和流速——并与未涂覆颗粒的特性进行比较。
Abstract The influence of the coating suspensions and particle properties on the coating process in a conventional spouted bed is presented. Glass beads were coated at fixed operating conditions with different formulations of aqueous polymeric coating suspensions in a spouted bed of laboratory scale. The wettability of the solids by the liquid was quantified by the contact angle and surface tension of the coating suspensions. The coating efficiency and particle growth were correlated with the adhesion of the coating suspension to the solid particle, which is a function of the solids and liquid characteristics. The physical properties of the coated particles—particle mean diameter, sphericity, bulk, absolute and apparent densities, porosity and flow velocity—were determined and compared to the properties of uncoated particles.