电泳卷式超滤隔膜系统

Ultrafilter Membranes

电泳卷式超滤隔膜系统

Ultrafilter membranes work on the principle of size exclusion. Dissolved molecules and particles are sorted out according to whether or not they are small enough to pass through the pores of the membrane.

超滤膜是利用筛分原理工作藉此把所需的并能通过隔膜微孔的物质与不能通过的溶解分子颗粒分开。

In normal particulate filtration, liquid is forced under pressure through a porous medium. In ultrafiltration, similarly, liquid is forced under pressure through a porous medium. However, the pores are 1,000 times smaller. In fact, the membranes are so small that even some bacteria are unable to pass through.

一般的过滤是在压力作用下强行是液体通过多孔介质， 同样，在超滤中， 也实在压力下强行通过多孔介质。然而，这孔径要小1，000倍， 实际上， 隔膜的孔径小得连有些细菌都不能通过。

The ultrafilter membrane will pass water, acid, some solvent, low-molecular- weight fractions of resin, and contaminating ions. When the bath is operating within the proper conductivity parameters, the ultrafiltrate is used to achieve the closed-loop rinse system. High conductivity is an indication of ion contamination. When this condition occurs, the ultrafiltrate is sent to drain, and deionized water is added to the rinses.

超滤膜可以通过水，酸，某些溶剂， 低分子量树脂及杂质离子。当电泳槽在正常的电导率参数内运行时，使用超滤供封闭循环的清洗系统，电导率高， 表明有离子污染， 当发生这样情况时， 要排放超滤液， 加去离子水供清洗用。

Two forces oppose the production of ultrafiltrate: osmotic force and concentration polarization force:

阻碍超滤液的生成有两种力，渗透力和浓差极化力。

Osmotic force is the tendency of a solvent to equalize concentration throughout its volume. This force is overcome by applying pressure to the paint passing through the ultrafilter.

渗透力是一个溶剂在其容积内浓度不断平衡的趋势。 这个力靠施加压力使油漆通过超滤装置来克服。

Concentration polarization force is the tendency for molecules to build up or concentrate at the membrane surface. Again, pressure may be applied, but a rapid movement of paint across the membrane is also important.  At least four types of ultrafilters are available:

浓差极化力是分子在膜表面堆积或浓缩的趋势。仍然是要施加压力， 而且使油漆快速通过膜表面，来减少这个浓差极化力。超滤装置有四种类型中， 后面两种最普及。