Tailoring the surface pore size of hollow fiber membranes in the TIPS process

2018 ◽  
Vol 6 (2) ◽  
pp. 535-547 ◽  
Author(s):  
Chuanjie Fang ◽  
Sungil Jeon ◽  
Saeid Rajabzadeh ◽  
Liang Cheng ◽  
Lifeng Fang ◽  
...  
Keyword(s):  
Pore Size ◽  
Hollow Fiber ◽  
Outer Layer ◽  
New Method ◽  
Hollow Fiber Membranes ◽  
Polymeric Solution ◽  
Fiber Membranes

A new method was used to tailor the surface pore size of PVDF hollow fiber membranes in the TIPS process by the co-extrusion of different solvents at the outer layer of the extruded polymeric solution.

Relating osmotic performance of thin film composite hollow fiber membranes to support layer surface pore size

2017 ◽  
Vol 540 ◽  
pp. 344-353 ◽  
Author(s):  
Jian Ren ◽  
Maqsud R. Chowdhury ◽  
Jie Qi ◽  
Lingling Xia ◽  
Bryan D. Huey ◽  
...  
Keyword(s):  
Thin Film ◽  
Pore Size ◽  
Hollow Fiber ◽  
Layer Surface ◽  
Hollow Fiber Membranes ◽  
Film Composite ◽  
Thin Film Composite ◽  
Fiber Membranes

Fabrication of ordered mesoporous carbon hollow fiber membranes via a confined soft templating approach

2014 ◽  
Vol 2 (12) ◽  
pp. 4144-4149 ◽  
Author(s):  
Jiansheng Li ◽  
Junwen Qi ◽  
Chao Liu ◽  
Liang Zhou ◽  
Hao Song ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Mesoporous Carbon ◽  
Knudsen Diffusion ◽  
Ordered Mesoporous Carbon ◽  
New Method ◽  
Hollow Fiber Membranes ◽  
Diffusion Behavior ◽  
Ordered Mesoporous ◽  
Soft Templating ◽  
Fiber Membranes

A new method to prepare ordered mesoporous carbon (OMC) hollow fiber membranes through a confined soft templating route is developed. The gas permeance results indicate that the OMC hollow fiber membranes exhibit Knudsen diffusion behavior confirming their good quality.

scholarly journals The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

2016 ◽  
Author(s):  
Sungil Jeon ◽  
Saeid Rajabzadeh ◽  
Ryo Okamura ◽  
Toru Ishigami ◽  
Susumu Hasegawa ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Pore Size ◽  
Hollow Fiber ◽  
Membrane Fouling ◽  
Polymeric Membrane ◽  
Transmembrane Pressure ◽  
Hollow Fiber Membranes ◽  
Membrane Material ◽  
Pore Sizes ◽  
Fiber Membranes

We aimed to investigate the relationship between membrane material and development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polyethersulfone (PES), and polyvinylidene fluoride (PVDF) with activated sludge taken from a municipal wastewater treatment plant. The three UF hollow fiber membranes were prepared by a non-solvent-induced phase separation method and had similar water permeabilities and pore sizes. The results revealed that transmembrane pressure (TMP) increased more sharply for the hydrophobic PVDF membrane than for the hydrophilic CA membrane in batch filtration tests, even when membranes with similar permeabilities and pore sizes were used. PVDF hollow fiber membranes with smaller pores had greater fouling propensity than those with larger pores. In contrast, CA hollow fiber membranes showed good mitigation of membrane fouling regardless of pore size. The results obtained in this study suggest that the surface hydrophilicity and pore size of UF membranes clearly affect the fouling properties in MBR operation when using activated sludge.

scholarly journals Study on the effect of spinning conditions on the performance of PSf/PVP ultrafiltration hollow fiber membrane

2018 ◽  
Vol 14 (3) ◽  
pp. 343-347 ◽  
Author(s):  
Sumarni Mansur ◽  
Mohd Hafiz Dzarfan Othman ◽  
Ahmad Fauzi Ismail ◽  
Muhammad Nidzhom Zainol Abidin ◽  
Noresah Said ◽  
...  
Keyword(s):  
Pore Size ◽  
Hollow Fiber ◽  
Phase Inversion ◽  
Hollow Fiber Membrane ◽  
Hollow Fibers ◽  
Hollow Fiber Membranes ◽  
Fiber Membrane ◽  
Membrane Pore ◽  
Phase Inversion Technique ◽  
Fiber Membranes

Asymmetric, porous ultrafiltration polysulfone (PSf) hollow fiber membranes were fabricated via the dry-wet phase inversion spinning technique specifically for haemodialysis membrane. The objective was to discover the suitable spinning condition for the fabrication of ultrafiltration hollow fiber membrane with desired sponge-like structure. During haemodialysis procedure, uremic toxins such as urea and creatinine range from size 10,000-55,000 Da needs to be excreted out from the blood. While, proteins such as albumin (66,000 Da) need to be retained. The physical structure or morphology of a fabricated membrane is a major concern in determining the efficiency of a dialysis membrane. Different type of membrane morphology will give a different result in term of its permeability and clearance efficiency. The phase inversion spinning technique is suitable in producing ultrafiltation (UF) membrane where the average pore size of the fabricated membrane is in the range of 0.001 – 0.1 µm. However, there is many factors need to be controlled and manipulated in the phase inversion technique. In this study, the effect of the PVP on membrane pore size and performances were analysed. The contact angle measurement was measured to determine the hydrophilicity of the fibers. The hydrophilic polymer is favorable to avoid fouling and increase its biocompatibility. Furthermore, the diameter of the hollow fibers was determined using a scanning electron microscope (SEM). The effects of different morphology of the hollow fibers on the performance of the membranes were evaluated by pure water flux and BSA rejection. Both techniques were tested using permeation flux system. Based on the results obtained, it is found that the finger-like macrovoids in PSf hollow fiber membranes were suppressed by adding 8% PVP (Mw of 360 kDa) into the spinning dope solution as the result of a drastic increase in dope viscosity. On top of that, fiber spun with 8% PVP show more porous structure which contribute to higher permeability of the membrane. The result of this study can benefit to the membrane field of research especially in membrane technology for haemodialysis application.

Pore size and pore size distribution on the surface of polyethersulfone hollow fiber membranes

Desalination ◽  
1991 ◽  
Vol 85 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Tinghui Liu ◽  
Shuguang Xu ◽  
Donghua Zhang ◽  
S Sourirajan ◽  
Takeshi Matsuura
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Hollow Fiber ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes
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