Hollow fiber (HF) membrane fabrication: A review on the effects of solution spinning conditions on morphology and performance

Ahmad, Abdul Latif; Otitoju, Tunmise Ayode; Ooi, B. S.

doi:10.1016/j.jiec.2018.10.005

Cited by 74 publications

(51 citation statements)

References 147 publications

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“…The nascent fiber is firstly put into contact with the bore fluid that acts as the coagulant, passes through an air gap and enters into the second coagulant (coagulant bath). The morphology of the membrane can be controlled by the spinneret design; the composition, temperature and flow rate of the bore fluid; the extrusion flow rate, pressure and temperature of the dopes and their viscosity; the air gap distance; the coagulation bath (coagulant and temperature selection); the elongational draw ratio and take-up speed, together with travelling distance; the drying process when removing solvents and nonsolvents from the HF; and the post-treatment and additional coating [ 54 ]. The post-treatment process includes not only solvent exchange and solvent removal but also physical aging to achieve the thermodynamic equilibrium of the fiber, its structure relaxation, free volume reduction and polymer chain packing density increase [ 55 ].…”

Section: Pristine and Mixed Matrix Membranes Based On Matrimid ® /Zifmentioning

confidence: 99%

Exploring the Potential Application of Matrimid® and ZIFs-Based Membranes for Hydrogen Recovery: A Review

2021

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Hydrogen recovery is at the center of the energy transition guidelines promoted by governments, owing to its applicability as an energy resource, but calls for energetically nonintensive recovery methods. The employment of polymeric membranes in selective gas separations has arisen as a potential alternative, as its established commercial availability demonstrates. However, enhanced features need to be developed to achieve adequate mechanical properties and the membrane performance that allows the obtention of hydrogen with the required industrial purity. Matrimid®, as a polyimide, is an attractive material providing relatively good performance to selectively recover hydrogen. As a consequence, this review aims to study and summarize the main results, mechanisms involved and advances in the use of Matrimid® as a selective material for hydrogen separation to date, delving into membrane fabrication procedures that increase the effectiveness of hydrogen recovery, i.e., the addition of fillers (within which ZIFs have acquired extraordinary importance), chemical crosslinking or polymeric blending, among others.

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Section: Pristine and Mixed Matrix Membranes Based On Matrimid ® /Zifmentioning

confidence: 99%

Exploring the Potential Application of Matrimid® and ZIFs-Based Membranes for Hydrogen Recovery: A Review

2021

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“…Polyethersulfone (PES) has been widely used because it can tolerate a large range of pH, has a good thermal stability and excellent chemical and mechanical resistance 6,8,9 . This polymer and the conditions for the solution spinning determine the morphology and properties of hollow fiber membrane, such as selectivity 7,10 .…”

Section: Introductionmentioning

confidence: 99%

Comparison between two Polyethersulfone concentrations in hollow fiber ultrafiltration membranes. Is it worth to use more polymer?

Gonzaga

Mierzwa

2021

Eclet. Quim. J.

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Polyethersulfone (PES) hollow fiber membranes were fabricated using dry-jet wet spinning technique, a phase inversion method, with 16 and 20% PES, N-methyl-2-pyrrolidone (NMP) as solvent and tap water as nonsolvent, in order to evaluate if the amount of polymer has a significant effect on its properties. They were characterized using SEM for a morphological analysis, a continuous system to measure pure water permeability (PWP) and molecular weight cutoff (MWCO), and a universal testing machine to tensile tests. The obtained results for PWP was an average of about 220 L m- ² h-1 bar-1 for the 16% PES membrane and 174 L m- ² h-1 bar-1 for the 20% PES membrane. The results of mechanical resistance and MWCO did not present statistical differences. Thus, it is confirmed that the 16% PES membrane can be as good as the 20%, despite using less polymer, a finding that can further motivate membrane modification studies and other related works.

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“…Polymer hollow fiber membranes were first described in 1966 [1]; however, improving their fabrication methods is still a demanding task [2][3][4][5][6][7]. The hollow fiber membrane configuration provides a large separation surface area due to a high packing density of the membrane in a module compared to flat and tubular membranes.…”

Section: Introductionmentioning

confidence: 99%

“…The porosity and thickness of the selective layer depend primarily on the composition of the dope solution and on the conditions for making the hollow fiber membrane. By varying the spinning parameters of hollow fibers and the composition of the dope solution, it is possible to control the characteristics of the membrane and optimize its properties for specific separation tasks [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The draw ratio (DR) is an important parameter that allows the geometry and morphology of resulting hollow fibers to be varied [4], so that hollow fiber membranes with desired properties can be obtained. The aim of this work was to study the effect of drawing on the geometric, morphological, and gas transport properties of asymmetric hollow fiber membranes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Draw Ratio on the Morphology of Polysulfone Hollow Fiber Membranes

Matveev

Kutuzov

Vasilevsky

2020

Membr. Membr. Technol.

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The draw ratio (DR) is an important parameter in the process of spinning hollow fiber membranes, by which their separation and performance characteristics can be controlled over a wide range of values. For the first time, a method for determining the DR using a roller movable in the vertical direction is described, which makes it possible to establish the ratio of the dope extrusion linear flow rate to the take-up speed. In the course of the work, polysulfone hollow-fiber membranes were obtained at various DR values. The influence of the draw ratio on the morphology and geometric and gas transport properties of the resulting polysulfone hollow fiber membranes has been examined.

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Hollow fiber (HF) membrane fabrication: A review on the effects of solution spinning conditions on morphology and performance

Cited by 74 publications

References 147 publications

Exploring the Potential Application of Matrimid® and ZIFs-Based Membranes for Hydrogen Recovery: A Review

Exploring the Potential Application of Matrimid® and ZIFs-Based Membranes for Hydrogen Recovery: A Review

Comparison between two Polyethersulfone concentrations in hollow fiber ultrafiltration membranes. Is it worth to use more polymer?

Effect of Draw Ratio on the Morphology of Polysulfone Hollow Fiber Membranes

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