Growth of a ZIF-8 membrane on the inner-surface of a ceramic hollow fiber via cycling precursors

2013 ◽  
Vol 49 (87) ◽  
pp. 10326 ◽  
Author(s):  
Kang Huang ◽  
Ziye Dong ◽  
Qianqian Li ◽  
Wanqin Jin
Keyword(s):  
Hollow Fiber ◽  
Inner Surface

scholarly journals Fractal diffusion of silver ions in hollow cylinders with unsmooth inner surface

2019 ◽  
Vol 14 ◽  
pp. 155892501989564
Author(s):  
Ling Lin ◽  
Shao-Wen Yao
Keyword(s):  
Fractal Dimension ◽  
Hollow Fiber ◽  
Theoretical Basis ◽  
Silver Ions ◽  
Present Theory ◽  
Ion Release ◽  
Practical Applications ◽  
Fractal Derivative ◽  
Inner Surface ◽  
Hollow Cylinders

This article studies the ion release from an unsmooth inner surface of a hollow fiber. A fractal diffusion model is established using the fractal derivative, and the effect of the fractal dimension on the ion release is elucidated. The present theory provides a theoretical basis for the optimization of a hollow fiber contained silver ions for practical applications.

The preparation of zeolite NaA membranes on the inner surface of hollow fiber supports

2012 ◽  
Vol 409-410 ◽  
pp. 318-328 ◽  
Author(s):  
Lulu Lai ◽  
Jia Shao ◽  
Qinqin Ge ◽  
Zhengbao Wang ◽  
Yushan Yan
Keyword(s):  
Hollow Fiber ◽  
Inner Surface ◽  
Zeolite Naa

Generating backwashable carbon nanotube mats on the inner surface of polymeric hollow fiber membranes

2013 ◽  
Vol 446 ◽  
pp. 59-67 ◽  
Author(s):  
M.J. Gallagher ◽  
H. Huang ◽  
K.J. Schwab ◽  
D.H. Fairbrother ◽  
B. Teychene
Keyword(s):  
Carbon Nanotube ◽  
Hollow Fiber ◽  
Hollow Fiber Membranes ◽  
Inner Surface ◽  
Fiber Membranes

Hollow Fiber Immobilized L-asparaginase: In Vivo and in Vitro Immunological Studies

1983 ◽  
Vol 6 (2) ◽  
pp. 91-96 ◽  
Author(s):  
L. Callegaro ◽  
F. Assone ◽  
E. Cecconato ◽  
A. Malinverni ◽  
V. Pasteris ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Immobilized Enzyme ◽  
Hollow Fibers ◽  
Enzyme Linked Immunosorbent Assay ◽  
Related Protein ◽  
Specific Enzyme ◽  
Protein Fragments ◽  
Inner Surface

The enzyme L-asparaginase was covalently immobilized on the inner surface of the hollow fibers utilized in a commercially available dialyzer by the periodate method. After sterilization with gamma radiation the bioreactor was able to metabolize in vivo, 90 per cent of circulating asparagine in two hours. The absence in blood of asparaginase-related protein fragments, released from the hollow fiber immobilized enzyme, was monitored using a specific enzyme-linked immunosorbent assay (ELISA).

Interfacially Polymerized Composite Hollow Fiber Membrane for CO2 Separation

2013 ◽  
Vol 781-784 ◽  
pp. 2040-2046
Author(s):  
Alsamani A. M. Salih ◽  
Chun Hai Yi ◽  
Bo Lun Yang ◽  
Peng Chen
Keyword(s):  
Hollow Fiber ◽  
Interfacial Polymerization ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Acceptor Concentration ◽  
Membrane Performance ◽  
Inner Surface ◽  
Trimesoyl Chloride ◽  
Very High ◽  
Organic Monomer

PEAm-TMC/PDMS/PVC composite hollow fiber membrane for CO2 separation was developed through interfacial polymerization (IP) on the PDMS pre-coated inner surface of PVC hollow fiber. Polyetheramine (PEAm) and Trimesoyl chloride (TMC) were selected as aqueous monomer and organic monomer, respectively. SEM observation result shows that the thickness of PEAm-TMC IP layer is about 215 nm. The effects of monomer concentrations and acid acceptor concentration on the membrane performance were investigated. The results shows that the CO2 permeance decareses and CO2/N2 selectivity increases with the increasing concentrations of PEAm, TMC and Na2CO3. At 0.12 MPa, the composite hollow fiber membrane possesses a very high CO2 permeance of 964 GPU and CO2/N2 selectivity of 40.6.

Formation of Highly Aligned Grooves on Inner Surface of Semipermeable Hollow Fiber Membrane for Directional Axonal Outgrowth

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Yu Long ◽  
Ning Zhang ◽  
Yong Huang ◽  
Xuejun Wen
Keyword(s):  
Polymer Solution ◽  
Flow Rate ◽  
Hollow Fiber ◽  
Phase Inversion ◽  
Nervous System Development ◽  
Fabrication Process ◽  
Axonal Outgrowth ◽  
Cord Injury ◽  
Inner Surface ◽  
Groove Texture

It is generally believed that organized neural architecture is essential for nervous system development, function, and regeneration. In the absence of guidance cues, regenerating axons may lose their directions and become misaligned, resulting in the formation of neuromas and/or misappropriate connections. To help regenerate axons across damaged regions and guide them to appropriate targets, some bridging devices such as microgrooves are being intensively researched to achieve a better directional axonal growth. This paper reports a novel fabrication process to generate a highly aligned groove texture on the inner surface of semipermeable hollow fiber membranes (HFMs). HFMs have demonstrated promising results in guiding axonal regeneration. The fabrication process utilized a wet phase-inversion procedure with polyurethane (PU) as model polymer, dimethyl sulfoxide (DMSO) as solvent, and water as nonsolvent. Data indicated that highly aligned groove texture could be formed on the HFM inner surface by carefully controlling phase-inversion conditions such as the polymer solution flow rate, and/or nonsolvent flow rate, and/or polymer solution concentration ratio. The texture forming mechanism is qualitatively explained using a PU-DMSO-water ternary phase diagram and the dynamics of fluid instability. Axonal outgrowth on the HFM with aligned grooves showed the highly aligned orientation and improved axonal outgrowth length. This study may eventually lead to a new and effective way to fabricate nerve grafts for the spinal cord injury and nerve damage treatment based on this highly aligned three dimensional scaffold.

scholarly journals A Fibrin-Based Tissue-Engineered Renal Proximal Tubule for Bioartificial Kidney Devices: Development, Characterization and In Vitro Transport Study

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Chee Ping Ng ◽  
Yuhang Zhuang ◽  
Alex Wei Haw Lin ◽  
Jeremy Choon Meng Teo
Keyword(s):  
Proximal Tubule ◽  
Hollow Fiber ◽  
Cell Attachment ◽  
Hollow Fiber Membrane ◽  
Renal Proximal Tubule ◽  
Small Scale ◽  
Confluent Monolayer ◽  
Bioartificial Kidney ◽  
Inner Surface

A bioartificial renal proximal tubule is successfully engineered as a first step towards a bioartificial kidney for improved renal substitution therapy. To engineer the tubule, a tunable hollow fiber membrane with an exterior skin layer that provides immunoprotection for the cells from extracapillary blood flow and a coarse inner surface that facilitates a hydrogel coating for cell attachment was embedded in a “lab-on-a-chip” model for the small-scale exploratory testing under flow conditions. Fibrin was coated onto the inner surface of the hollow fiber, and human renal proximal tubule epithelial cells were then seeded. Using this model, we successfully cultured a confluent monolayer, as ascertained by immunofluorescence staining for ZO-1 tight junctions and other proximal tubule markers, scanning electron microscopy, and FITC-inulin recovery studies. Furthermore, the inulin studies, combined with the creatinine and glucose transport profiles, suggested that the confluent monolayer exhibits functional transport capabilities. The novel approaches here may eventually improve current renal substitution technology for renal failure patients.

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