Polysulfone hollow fibers. I. Spinning and properties

Abstract

SynopsisThe development of porous polysulfone hollow fibers and the spinning process used are discussed. An analysis is given of the spinning parameters which determine fiber mechanical properties and permeability. Hollow fibers were prepared which display high modulus and high tensile strength. These fibers can withstand hydraulic pressures of more than 1000 psi. They can thus serve as supports for dense, ultrathin membrane coatings, useful in high-pressure reverse osmosis and ultrafiltration processes.

Spinning of hollow fiber ultrafiltration membranes from a polymer blend

“…Any effect on the performance of the membranes was not reported. The diameter of the hollow fiber depends on the take-off rate and on the extrusion rate of the polymer solution as was published by Cabasso et al [3]. Espenan et al [2] found that the diameter of the fiber decreases when the airgap becomes longer or when the flow rate of the polymer solution decreases.…”

“…Even so the number of fundamental contributions to this subject is limited [1][2][3][4][5][6]. Much knowledge about the spinning of porous hollow fiber membranes has been described in patents.…”

“…It is known [9,10] that hydrophilic materials are less susceptible to adsorption of proteins, which for industrial applications of membranes is a very attractive behavior. PVP is a well known additive in membrane forming systems [1][2][3][4][5][11][12][13][14]. The effects of this additive are an increase in viscosity of the polymer solution, an influence on macrovoid formation and an increase in permeability of the membranes.…”

Influence of precursor structure on the properties of polyacrylonitrile-based activated carbon hollow fiber

“…Table I shows the molecular weights, polydispersities, compositions, and mechanical properties a1. [19][20][21] Table I. Samples B and C have the crystal size of 1.29 and 0.81 nm, respectively, due to their lower acrylonitrile content.…”

Study on the effect of spinning conditions and surface treatment on the geometry and performance of polymeric hollow-fibre membranes

“…Despite its usefulness and adaptability to different membrane separation processes [1][2][3][4][5][6][7][8][9][10], the fundamental study on the hollow fibre is very scarce in the literature. The reason may be that flat-sheet membranes are relatively easy to prepare, and the fundamental principles underlying membrane formation and membrane transport are considered to be the same regardless of the membrane shape and membrane configuration.…”