scholarly journals The Maximal Pore Size of Hydrophobic Microporous Membranes Does Not Fully Characterize the Resistance to Plasma Breakthrough of Membrane Devices for Extracorporeal Blood Oxygenation

2020 ◽  
Vol 7 ◽  
Author(s):  
Gionata Fragomeni ◽  
Mara Terzini ◽  
Antonio Comite ◽  
Gerardo Catapano
Keyword(s):  
Pore Size ◽  
Blood Oxygenation ◽  
Microporous Membranes ◽  
Extracorporeal Blood

Preparation and Properties of Low Density Replica Carbon Foams

1992 ◽  
Vol 270 ◽  
Author(s):  
S. S. Hulsey ◽  
P. K. Poco
Keyword(s):  
Sodium Chloride ◽  
Pore Size ◽  
Laser Fusion ◽  
Low Density ◽  
Microporous Membranes ◽  
Leaching Process ◽  
Carbon Foams ◽  
Catalytic Supports ◽  
Inorganic Substrate

ABSTRACTLow density foams are used for a variety of applications, including catalytic supports, battery anodes, microporous membranes, and laser fusion targets. The technique for making replica carbon foams described in this paper has been previously reported[I] and involves a process in which an inorganic substrate (sodium chloride) is infused with a carbonizable polymer. After carbonization, the substrate is removed by a leaching process and the wet foam is dried; the resultant foam is referred to as replica carbon. This paper describes improvements in the processing which result in a smaller pore size and improved foam homogeneity.The original substrate is the single most important factor affecting the resultant structure. Techniques to improve the uniformity of the substrate and the translation of substrate anomalies into the final product are described.

The Effect of Stretching on UHWMPE Microporous Film by Thermally Induced Phase Separation Method

2020 ◽  
Vol 993 ◽  
pp. 906-914
Author(s):  
Xiao Na Wang ◽  
Yue Mu ◽  
Guo Qun Zhao ◽  
Jia Cheng Gao ◽  
You Lei Zhou ◽  
...  
Keyword(s):  
Phase Separation ◽  
Pore Structure ◽  
Pore Size ◽  
Liquid Paraffin ◽  
Great Influence ◽  
Practical Significance ◽  
Microporous Membranes ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Stretching Ratio

UHMWPE microporous membranes were prepared via thermally induced phase separation(TIPS) combining with stretching. TIPS method was adopted to resolve processing difficulties of UHMEPE, and the subsequent stretching was used to optimize pore structure. The preparation process utilized liquid paraffin (LP) as the diluent. The effect of different stretching ratios on pore structure was investigated through SEM, XRD and mercury intrusion test. The results indicated that stretching process not only greatly improved the pore size uniformity and pore distribution uniformity, but also had a great influence on pore size controlling. When the stretching ratio was lower than 80%, the pore size was concentrated in nano-region which pore size distribution was around 0.02-0.03 μm. While the stretching ratio was larger than 80%, due to bridging breakage and liquid paraffin movement, pore size was concentrated in the micron area where pore size mainly distributed around 1μm, which had a practical significance for controlling the pore size of membranes in industrial production. And it’s obtained that at the same concentration of UHMWPE, the microporous membranes prepared in this study have more uniform pore structures than those reported previously.

Necrotizing Fasciitis Successfully Treated with Extracorporeal Blood Oxygenation and Ozonization (EBOO)

2002 ◽  
Vol 25 (12) ◽  
pp. 1194-1198 ◽  
Author(s):  
N. Di Paolo ◽  
V. Bocci ◽  
F. Cappelletti ◽  
G. Petrini ◽  
E. Gaggiotti
Keyword(s):  
Necrotizing Fasciitis ◽  
Dialysis Patient ◽  
Blood Oxygenation ◽  
Hospital Patient ◽  
Extracorporeal Blood ◽  
Traditional Therapies ◽  
Experimental Stage

A case of necrotizing fasciitis in a dialysis patient is described. Since traditional therapies were unsuccessful, extracorporeal blood oxygenation and ozonation (EBOO) was tried. This technique is no longer in the experimental stage and is used routinely in our hospital. Patient condition improved radically after EBOO.

Pore-size evaluation and gas transport behaviors of microporous membranes: An experimental and theoretical study

AIChE Journal ◽  
2015 ◽  
Vol 61 (7) ◽  
pp. 2268-2279 ◽  
Author(s):  
Gang Li ◽  
Hye Ryeon Lee ◽  
Hiroki Nagasawa ◽  
Masakoto Kanezashi ◽  
Tomohisa Yoshioka ◽  
...  
Keyword(s):  
Pore Size ◽  
Theoretical Study ◽  
Gas Transport ◽  
Microporous Membranes ◽  
Size Evaluation

Flow Behavior Through Porous Media and Microdisplacement Performances of Hydrophobically Modified Partially Hydrolyzed Polyacrylamide

SPE Journal ◽  
2016 ◽  
Vol 21 (03) ◽  
pp. 688-705 ◽  
Author(s):  
Yongjun Guo ◽  
Jun Hu ◽  
Xinmin Zhang ◽  
Rusen Feng ◽  
Huabing Li
Keyword(s):  
Pore Size ◽  
Flow Behavior ◽  
Polymer Concentration ◽  
Molecular Structures ◽  
Microporous Membranes ◽  
Series Connection ◽  
Partially Hydrolyzed Polyacrylamide ◽  
Hydrophobically Modified ◽  
Monomer Content ◽  
Hydrolyzed Polyacrylamide

Summary To investigate the relationship between the flow behavior and microdisplacement performance and the molecular structures, especially associating monomer content, of hydrophobically modified partially hydrolyzed polyacrylamides (HMHPAMs) with varied associating monomer content, compared with that of partially hydrolyzed polyacrylamide (HPAM), a series of experiments were conducted that involved the filtration through screen viscometer, nucleopore membrane, and series-connection microporous membranes; the flow through three serial mounted artificial cores; and the displacement in the microetching model. The screen factors and the hydrodynamic sizes of polymers were obtained by screen viscometer and nucleopore membrane, respectively. The results show that the screen factors and hydrodynamic sizes of HMHPAMs were much-more sensitive to the polymer concentration, filtration pressure, and associating monomer content than HPAM. Moreover, the filtration experiment through series-connection microporous membranes indicates that there were moderate associating monomer content or greater flow pressure or pore size for HMHPAMs to easily pass and obtain equivalent differential pressure between membranes, which implies that the compatibility between the pore size and the hydrodynamic sizes of the microstructures is the most-important factor for the injectivity of HMHPAMs. The resistance factor (RF) established by HMHPAMs through three serial mounted artificial cores notably tended to be higher than HPAMs, and the HMHPAMs with higher associating monomer content could generate a greater RF. In contrast, when the associating monomer content was low enough and the permeability was high enough, the flow could obtain equilibrium easily and the RFs were almost in accordance, which indicate there was moderate associating monomer content for HMHPAMs to propagate deep into the cores. At the same viscosity, HMHPAMs had better microdisplacement efficiency than glycerol (no effect) and HPAM (a small portion) for displacing the residual oil trapped in the “dead” ends of flow channel. The pilot tests of the associative polymer AP-P4, which was developed for Bohai oil fields, have demonstrated the great application potential of HMHPAMs for enhanced oil recovery (EOR).

Artificial Device for Extracorporeal Blood Oxygenation in Rats

2007 ◽  
Vol 0 (0) ◽  
pp. 070802063815006-???
Author(s):  
Valentin Laurentiu Ordodi ◽  
Virgil Paunescu ◽  
Mihai Ionac ◽  
Dorel Sandesc ◽  
Ani Aurora Mic ◽  
...  
Keyword(s):  
Blood Oxygenation ◽  
Extracorporeal Blood
Sign in / Sign up

Export Citation Format

Share Document