Liquid purification or separation – Filter – Material
Patent
1991-11-27
1993-03-09
Sever, Frank
Liquid purification or separation
Filter
Material
264 41, B01D 7110, B01D 7112
Patent
active
051924404
ABSTRACT:
A cellulose dialysis membrane in the form of a hollow fiber is formed from cellulose-cuoxam solutions. An internal cavity is formed by a liquid or a gas. The membrane has a UFR of at least 4 ml/m.sup.2 . h . mm Hg. The hydrogel components of the cellulose are distributed in cells with a mean free path length of 3-10 nm in the membrane wall in a log-normal distribution. The mean free path length is the distance between the cells and is determined by the freeze-etching replica method after swelling of the membrane with water. More than 65% of all the hydrogel cell interfaces of the membrane have a form factor between 1.0 and 5.0. In addition, the UFR of the membrane after storage for more than ten days in a humid atmosphere at 20.degree. C. and 100% relative humidity is more than 50% of the value determined immediately after drying or after storage in a dry environment.
REFERENCES:
patent: 4164437 (1979-08-01), Henne et al.
patent: 4322381 (1982-03-01), Joh
patent: 4323627 (1982-04-01), Joh
patent: 4604326 (1986-08-01), Manabe et al.
patent: 4822540 (1989-04-01), Manabe et al.
patent: 4919809 (1990-04-01), Yamamoto et al.
Rheological and electron microscopic characterization of aqueous carboxymethyl cellulose gels--Part II: Visualization of the gel structure by freeze-fracturing--T. Muller et al., Colloid Polymer Sci., 267:230-36 (1989).
Akzo N.V.
Sever Frank
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