MECHANISM OF UNILATERAL DISTRIBUTION OF TWO SOLVENT PHASES IN THE ROTATING COIL

制作了一个简单的旋转装置来研究运动， 两种不混溶的溶剂相在旋转盘管中的分布。 实验通过1至2cm内径的玻璃线圈进行，与 螺旋直径范围为2.5 cm至20 cm。 结果 总结了用各种两相溶剂对得到的 下面根据两个主要物理之间的相互作用 因素，即，溶剂-壁相互作用与阿基米德螺旋 力 1. 溶剂-壁相互作用的影响： 某些二元溶剂体系导致在一个或多个相链段中的相链段堵塞， 窄孔线圈干扰两相运动， 旋转线圈 2. 综合效应：在这种过渡情况下，一个阶段， 壁面亲和力通过另一相的片段 受阿基米德螺旋力影响，呈单边分布 在线圈的头部侧。 3. 阿基米德螺旋效应：在其余情况下，有两个 时相呈4级特征分布 根据所施加的旋转速度来调节转速。 阶段I：缓慢的线圈旋转将两相均匀地分布在 线圈。 第二阶段：在临界转速下，两个阶段从单边 分布 除氯仿/水外，较重相 占据线圈的头部侧。 第三阶段：单边分配回归平均分配 通过各种分布模式。 第四阶段：最后，高转速建立静压 相位分布

A simple rotary device was fabricated to study motion and distribution of two immiscible solvent phases in a rotating coil. Experiments were performed by glass coils of 1 to 2 cm i.d., with helical diameters ranging from 2.5 cm to 20 cm. The results obtained with various two-phase solvent pairs are summarized below on the basis of interplay between the two major physical factors, i.e., solvent-wall interaction and Achimedean screw force. 1. Effect of solvent-wall interaction: High interfacial tension of some binary solvent systems causes plug of phase segments in a narrow-bore coil to interfere with movement of the two phases in the rotating coil. 2. Combined Effects: In this transitional case, one phase with wall-surface affinity passes through segments of the other phase affected by Archimedean screw force and unilaterally distributed in the head side of the coil. 3. Archimedean screw effect: In the rest of the cases, two phases display characteristic distribution consisting of 4 stage according to the applied rotational speed. Stage I: Slow coil rotation distributes two phases evenly in the coil. Stage II: At critical rotational speed, two phases from unilateral distribution. Except for chloroform/water, the heavier phase occupies the head side of the coil. Stage III: Unilateral distribution returns to even distribution through a variety of distribution patterns. Stage IV: Finally, high rotational speed establishes hydrostatic phase distribution.