Characterization of dextran transport and molecular weight cutoff (MWCO) of large pore size hollow fiber ultrafiltration membranes

2020 ◽  
pp. 119025
Author(s):  
Christopher J. Yehl ◽  
Andrew L. Zydney
Keyword(s):  
Molecular Weight ◽  
Pore Size ◽  
Hollow Fiber ◽  
Ultrafiltration Membranes ◽  
Large Pore ◽  
Molecular Weight Cutoff ◽  
Large Pore Size

Development of an optimized dextran retention test for large pore size hollow fiber ultrafiltration membranes

2012 ◽  
Vol 421-422 ◽  
pp. 32-38 ◽  
Author(s):  
Meisam Bakhshayeshi ◽  
Achyuta Teella ◽  
Hongyi Zhou ◽  
Cathryn Olsen ◽  
Wei Yuan ◽  
...  
Keyword(s):  
Pore Size ◽  
Hollow Fiber ◽  
Retention Test ◽  
Ultrafiltration Membranes ◽  
Large Pore ◽  
Large Pore Size

Advances in the use of low-pressure, hollow fiber membranes for the disinfection of water

2005 ◽  
Vol 5 (5) ◽  
pp. 109-115 ◽  
Author(s):  
J.G. Jacangelo ◽  
A. Madec ◽  
K.J. Schwab ◽  
D.E. Huffman ◽  
C.S. Mysore
Keyword(s):  
Molecular Weight ◽  
Pore Size ◽  
Hollow Fiber ◽  
Good Predictor ◽  
Low Pressure ◽  
Hollow Fiber Membranes ◽  
Virus Removal ◽  
Testing Unit ◽  
Bench Scale ◽  
Molecular Weight Cutoff

Low-pressure membranes are often used for disinfection purposes. Using a simple bench-scale testing unit, several membranes were evaluated for their capability to remove microorganisms under specific conditions. Five hollow fiber modified polysulfone membranes ranging in molecular weight cutoff (MWCO) from 10,000 to 300,000 daltons and a 0.2 μm nominal pore size membrane were also evaluated. The 10,000 MWCO membrane removed less virus than the two 100,000 MWCO or the 300,000 MWCO membranes. The data from this study suggests that MWCO and specific flux may not, in all cases, be a good predictor of virus removal.

Large Pore Size Nanoporous Materials from the Self-Assembly of Asymmetric Bottlebrush Block Copolymers

Nano Letters ◽  
2011 ◽  
Vol 11 (3) ◽  
pp. 998-1001 ◽  
Author(s):  
Justin Bolton ◽  
Travis S. Bailey ◽  
Javid Rzayev
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Self Assembly ◽  
Nanoporous Materials ◽  
The Self ◽  
Large Pore ◽  
Large Pore Size

Gradient porosity and large pore size NiTi shape memory alloys

2007 ◽  
Vol 57 (11) ◽  
pp. 1020-1023 ◽  
Author(s):  
Y.P. Zhang ◽  
D.S. Li ◽  
X.P. Zhang
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Pore Size ◽  
Large Pore ◽  
Niti Shape Memory Alloys ◽  
Large Pore Size

scholarly journals SBA-15 with Crystalline Walls Produced via Thermal Treatment with the Alkali and Alkali Earth Metal Ions

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5270
Author(s):  
Sung Soo Park ◽  
Sang-Wook Chu ◽  
Liyi Shi ◽  
Shuai Yuan ◽  
Chang-Sik Ha
Keyword(s):  
Metal Ions ◽  
Pore Size ◽  
Metal Ion ◽  
Pore Diameter ◽  
Earth Metal ◽  
Silica Matrix ◽  
Alkali Earth Metal ◽  
Alkali Earth ◽  
Large Pore ◽  
Large Pore Size

Crystalline walled SBA-15 with large pore size were prepared using alkali and alkali earth metal ions (Na+, Li+, K+ and Ca2+). For this work, the ratios of alkali metal ions (Si/metal ion) ranged from 2.1 to 80, while the temperatures tested ranged from 500 to 700 °C. The SBA-15 prepared with Si/Na+ ratios ranging from 2.1 to 40 at 700 °C exhibited both cristobalite and quartz SiO2 structures in pore walls. When the Na+ amount increased (i.e., Si/Na increased from 80 to 40), the pore size was increased remarkably but the surface area and pore volume of the metal ion-based SBA-15 were decreased. When the SBA-15 prepared with Li+, K+ and Ca2+ ions (Si/metal ion = 40) was thermally treated at 700 °C, the crystalline SiO2 of quartz structure with large pore diameter (i.e., 802.5 Å) was observed for Ca+2 ion-based SBA-15, while no crystalline SiO2 structures were observed in pore walls for both the K+ and Li+ ions treated SBA-15. The crystalline SiO2 structures may be formed by the rearrangement of silica matrix when alkali or alkali earth metal ions are inserted into silica matrix at elevated temperature.

Selective dealkylation of alkyl polycyclic aromatic hydrocarbons towards innovative upgrading process of practical heavy oil

2021 ◽  
Author(s):  
Fumiya Nakano ◽  
Tomohide Goma ◽  
Satoshi Suganuma ◽  
Etsushi Tsuji ◽  
Naonobu Katada
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Pore Size ◽  
Aromatic Hydrocarbons ◽  
Heavy Oil ◽  
Acid Sites ◽  
Polycyclic Aromatics ◽  
Large Pore ◽  
Polycyclic Aromatic ◽  
Long Chain ◽  
Large Pore Size

A silica-monolayer loaded on alumina with weak Brønsted acid sites and large pore size can selectively dealkylate alkyl polycyclic aromatics to long-chain alkanes and polycyclic aromatics for production of chemicals and fuel.

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