ABSTRACT
In such a narrow concept of a membrane, the macroporous membrane is not considered to be a membrane if the pore size is beyond some arbitrarily set range of preference, e.g., that for microporous membranes. If the pore size of a microporous membrane is greater than the range, the macroporous media is not considered as a membrane. Consequently, a plate with a hole whose diameter is 250 mm is generally not considered as a membrane. However, the macroporous membranes with micrometer-to millimeter-sized holes function well in the transport of gases into liquid phase, which is an important chemical engineering process. The abovementioned single-hole plate with LCVD surface modification of the plate that surrounds the hole played a historically important role in establishing the principle involved in the sessile bubble formation and detachment, which is described in Chapter 27.
