scholarly journals Study on the Viscoelastic Fluid Behavior in Hollow Fiber Membrane Fabrication Process Using Giesekus’ Model

2017 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Hamid Didari ◽  
Mahdi Salami Hosseini ◽  
Reza Yegani

2016 ◽  
Vol 1133 ◽  
pp. 141-145 ◽  
Author(s):  
Norfazliana Abdullah ◽  
Mukhlis A. Rahman ◽  
A.F. Ismail ◽  
M.H.D. Othman ◽  
Juhana Jaafar

Alumina hollow fiber membrane with asymmetric structure has been developed using phase inversion technique followed by sintering process. The formation of asymmetric alumina hollow fiber was influenced by a phenomenon known as hydrodynamically unstable viscous fingering. A desired morphology of the ceramic hollow fiber membrane, that consists of 52 % of finger-like and the rest is sponge-like structure, is tailored by controlled parameters during membrane fabrication process. The result shows that the ratio of alumina/PESf should be reduced to 6. At this ratio, the finger-like structure can be easily formed with inner and outer diameters were 1.11 mm and 2.05 mm respectively. From the given thickness, approximately 243 µm of finger-like length can be developed originating from the lumen of hollow fiber.



2014 ◽  
Vol 461 ◽  
pp. 28-38 ◽  
Author(s):  
Lin Luo ◽  
Peng Wang ◽  
Sui Zhang ◽  
Gang Han ◽  
Tai-Shung Chung


2010 ◽  
Vol 78 (1) ◽  
Author(s):  
Jun Yin ◽  
Nicole Coutris ◽  
Yong Huang

Hollow fiber membrane (HFM) is one of the most popular membranes used for different industrial applications. Under some controlled fabrication conditions, axially aligned grooves can be formed on the HFM inner surface during typical immersion precipitation-based phase inversion fabrication processes. Such grooved HFMs are finding promising medical applications for nerve repair and regeneration. For better nerve regeneration performance, the HFM groove morphology should be carefully controlled. Toward this goal, this study has modeled the HFM groove number based on the shrinkage-induced buckling model in HFM fabrication. HFM has been modeled as a three-layer long fiber membrane. The HFM inner layer has been treated as a thin-walled elastic cylindrical shell and buckles due to the shrinkage of the compliant intermediate layer during solidification. The groove geometry, especially the groove number, has been reasonably predicted compared with the experimental measurements. This study has laid a mathematical foundation for HFM circumferential instability modeling, which is of recent interest in membrane fabrication.



2019 ◽  
Vol 77 (7) ◽  
pp. 3411-3427 ◽  
Author(s):  
Gulsum Melike Urper-Bayram ◽  
Burcu Sayinli ◽  
Nathan Bossa ◽  
Edgard Ngaboyamahina ◽  
Reyhan Sengur-Tasdemir ◽  
...  


Author(s):  
Jun Yin ◽  
Nicole Coutris ◽  
Yong Huang

Axially aligned grooves can be formed on the hollow fiber membrane (HFM) inner surface under some controlled fabrication conditions during a typical immersion precipitation-based phase inversion fabrication process. Such grooved HFMs are finding promising medical applications for nerve repair and regeneration. For better nerve regeneration performance, the HFM groove geometry should be carefully controlled. Towards this goal, in this study the polyacrylonitrile (PAN) HFM groove number has been modeled based on the radially inward pressure-induced buckling mechanism. HFM has been modeled as a long six-layer fiber membrane, and the HFM inner skin layer has been treated as a thin-walled elastic cylindrical shell under the shrinkage-induced inward radial pressure. The groove number has been reasonably estimated based on the resulting buckling mode as compared with the experimental measurements.





2012 ◽  
Vol 27 (9) ◽  
pp. 951-955
Author(s):  
Chun-Li YANG ◽  
Qi-Ming XU ◽  
Ming GONG ◽  
Wei LIU






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