Pore size control using plasma polymerization techniques

Details Pore size control using plasma polymerization techniques Pore size control using plasma polymerization techniques

1986-04-11

1989-02-21

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

21032189, 21050023, 210490, 264 22, B01D 1300

Patent

active

048062464

ABSTRACT:
A hydrophobic microporous membrane substrate can be coated with a plasma polymerizate coating in order to reduce the pore size of the substrate to a size smaller than the original pore size but not less than about 10 A. By selecting the particular plasma polymerizate coating, the surface of the substrate may be rendered either hydrophilic or hydrophobic, while the body of the substrate retains the substrate's original properties of mechanical strength and chemical resistance. Three different methods of applying plasma polymer coatings by plasma polymerization techniques are disclosed. These membranes are suitable for separating particulate larger than about 10 A from solutions. These membranes in the form of hollow fibers can be incorporated into separatory modules.

REFERENCES:
patent: 3228876 (1966-01-01), Mahon
patent: 3847652 (1974-11-01), Fletcher et al.
patent: 4330406 (1982-05-01), Sano et al.
patent: 4347139 (1982-08-01), Hayashi

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