Highly permeable polyethersulfone hollow fiber membranes for gas

Details Highly permeable polyethersulfone hollow fiber membranes for gas Highly permeable polyethersulfone hollow fiber membranes for gas

1998-06-19

2000-01-25

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264129, 264178F, 264184, 2642091, 26421114, 26421116, 264559, 264561, 264562, 264563, 427245, D01D 5247

Patent

active

060174749

ABSTRACT:
Formulation polymer dopes and development of processes for preparing asymmetric polyethersulfone hollow fiber membranes for gas separation are provided. Polyethersulfone hollow fiber membranes which exhibit improved gas permeability and selectivity have been produced from a formulated polymer dope containing N-methyl-2-pyrrolidone (NMP) and suitable nonsolvent-additives (NSA). The nonsolvent-additives are water and the mixture of ethanol and water. The dopes were tailored to be close to the point of phase separation, and have moderate polymer concentration with moderate viscosity. The hollow fibers were spun by the dry-wet phase inversion processes using water as both the internal and external coagulant. The dried hollow fibers are then coated with silicone rubber, a highly permeable material and the coated hollow fiber membranes exhibit excellent permeability and selectivity compared to those of the state-of-the-art polyethersulfone membranes.

REFERENCES:
patent: 3133132 (1964-05-01), Loeb et al.
patent: 4230463 (1980-10-01), Eichhorn et al.
patent: 4871494 (1989-10-01), Kesting et al.
patent: 4902422 (1990-02-01), Pinnau et al.
patent: 4992221 (1991-02-01), Malon et al.
Wang et al., Journal of Membrane Science 115 (1996) 85-108 (Published Jun. 26, 1996).
Wang et al., Journal of Applied Polymer Science, vol. 50, pp. 1693-1700 (1993).
Kumazawa et al., Journal of Polymer Science: Part B, Polymer Physics, vol. 31, pp. 881-886 (1993).

Affiliated with

Also associated with

Rating

Highly permeable polyethersulfone hollow fiber membranes for gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Highly permeable polyethersulfone hollow fiber membranes for gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Highly permeable polyethersulfone hollow fiber membranes for gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2313571