Influence of Spinning Conditions on the Morphology, Pore Size, Pore Size Distribution, Mechanical Properties, and Performance of PVC Hollow Fiber Membranes

Abstract Multi-bore hollow fiber membranes were prepared through phase inversion spinning process using new locally designed spinnerets of various geometrical shapes. The spun cylindrical-like, rectangular or ribbon-like, and triangular-like are prepared, dried, and characterized by scanning electronic microscope. Fibers of circular (seven, five, and four bores) shape, rectangular of five bores, and triangular of three bores were chosen to study the effect of both geometrical configuration and the number of bores on the amorphous structure and the mechanical properties of the membranes. Membrane geometry, surface amorphous, and bore arrangements are very sensitive to the operating conditions, especially the extrusion and drawing rates. Three polymeric blends of different compositions are used to prepare multi-bore hollow fiber membranes. This study revealed that the blend composition of PES 16%, PVP 2%, PEG 2%, diethylene glycol 2%, and NMP 78% gives excellent mechanical properties. Optimization of the preparation conditions also developed, where the dope flow rate, the bore flow rate, and the air gap were 1.14 cm3 s−1, 1.1 cm3 s−1, and 0 cm, respectively. Furthermore, this study proved that the circular arrangement has high mechanical strength. The prepared seven-MBHF membranes were applied in the membrane distillation process, a solution of 35 g/l NaCl was used to test the membrane performance, and the achieved flux and rejection were 28.32 L/m2 h and 98.9%, respectively. This performance demonstrated that the prepared membrane in this way is suitable to compete with conventional reverse osmosis technology that uses single track hollow fibers.

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Effect of Different Additives on the Properties and Performance of Porous Polysulfone Hollow Fiber Membranes for CO2Absorption

Sustainable Membrane Technology for Energy, Water, and Environment ◽

10.1002/9781118190180.ch16 ◽

2012 ◽

pp. 191-201

Author(s):

Amir Mansourizadeh ◽

Ahmad Fauzi Ismail ◽

Mohammad Ali Aroon

Keyword(s):

Hollow Fiber ◽

Hollow Fiber Membranes ◽

Fiber Membranes ◽

And Performance

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Structure Morphology of Polyethersulfone Hollow Fiber Membrane via Immersion Precipitation Phase Inversion Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.152-154.574 ◽

2012 ◽

Vol 152-154 ◽

pp. 574-578 ◽

Cited By ~ 4

Author(s):

Ping Lan ◽

Wei Wang

Keyword(s):

Hollow Fiber ◽

Phase Inversion ◽

Hollow Fiber Membrane ◽

Pure Water ◽

Water Flux ◽

Additive Concentration ◽

Hollow Fiber Membranes ◽

Fiber Membrane ◽

Fiber Membranes ◽

And Performance

Polyethersulfone (PES) hollow fiber membranes have been widely used in many fields, such as ultrafiltration, microfiltration, reverse osmosis, liquid/liquid or liquid/solid separation, gas separation, hemodialysis, and so on. In this paper, the sheet PES hollow fiber membranes were prepared. The morphology and performance of membranes can be controlled. By studying the influence of the compositions and conditions on the morphology and performance of PES hollow fiber membrane, the relationship of morphology and performance of the membrane is acquired. The additives were used such as glycerol, BuOH and PEG. In addition, immerse phase inversion was used as membranes preparation method. The morphology of the membrane was controlled by changing kinds of additive, concentration of additive and so on. It was found that the membrane morphologies were changed by additive obviously. Porosity , pure water flux, scanning electron microscopy(SEM) were used to characterize the morphology and performance of the membranes.

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