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和 旋转盘管中两个不相容的溶剂相的分布。 实验由直径为1至2厘米的玻璃线圈进行， 螺旋直径从2.5厘米到20厘米不等。结果是 总结了用各种两相溶剂对得到的结果 以下是两大实体之间相互作用的基础 影响因素，即溶剂-壁相互作用和阿奇米德螺杆 武力。 1.溶剂-壁相互作用的影响：高界面张力 某些二元溶剂体系会导致相段堵塞 窄孔线圈干扰两相的运动 旋转线圈。 2.综合影响：在这种过渡情况下，一个阶段与 壁面亲和力通过另一相的区段 受阿基米德螺纹力影响的单向分布 在线圈的头部侧。 3.阿基米德螺丝效应：在其余情况下，有两个 相位表现出由4个阶段组成的特征分布 根据所施加的转速。 第一阶段：缓慢的线圈旋转使两相均匀地分布在 线圈。 第二阶段：在临界转速下，单侧的两个阶段 分发。除氯仿/水外，较重的相 占据线圈的头部侧。 第三阶段：单边分配恢复均匀分配 通过不同的分布模式。 第四阶段：最后，高转速建立流体静力 位相分布。

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.