Molecular simulation and experimental study on propylene dehumidification through a PVA–PAA blend membrane

In this work, an attempt has been made for protein rejection from aqueous solution using ultrafiltration blend membrane based on poly(phenylene ether ether sulfone) (PEES) and polyetherimide (PEI) was prepared in various blend compositions. Prepared membranes were characterized in terms of pure water flux, water content, membrane hydraulic resistance, porosity, contact angle, scanning electron microscopy, thermogravimetric analysis, and attenuated total reflectance-Fourier transform infrared spectroscopy. Studies were carried out to find out the rejection of proteins such as trypsin, pepsin, egg albumin, and bovine serum albumin. The extent of protein separation is directly proportional to molecular weight of protein. Pristine PEES membrane exhibited high-percentage protein rejection of BSA (92.7%), EA (88.2%), pepsin (85.8%), and trypsin (82.2%) compared to PEES/PEI blend membranes. PEES/PEI blend membranes have better hydrophilic property compared to pristine PEES membrane. Pristine PEES has a contact angle of 97.8°, embedded with PEI and reduced to 67.9°. The thermal stability of the membrane was slightly decreased when the percentage of PEI composition into the PEES/PEI blend increased and observed that the pure PEES membrane has superior thermal stability than PEES/PEI blend membranes

Download Full-text

Influence of Hydrophilic Polymer on Proteins Separation, Molecular Weight Cut-off (MWCO) and Average Pore Size of Polysulfone Blend Membrane

Jurnal Teknologi ◽

10.11113/jt.v74.4698 ◽

2015 ◽

Vol 74 (7) ◽

Author(s):

Asmadi Ali ◽

Rosli Mohd Yunus ◽

Mohamad Awang ◽

Mohd Azizi Che Yunus

Keyword(s):

Molecular Weight ◽

Pore Size ◽

Structural Properties ◽

Phase Inversion ◽

Average Pore Size ◽

Separation Performance ◽

Average Pore ◽

Blend Membrane ◽

Blend Membranes ◽

Wet Phase Inversion

The aim of this study is to investigate the influence of different composition of cellulose acetate phtalate (CAP) on the membrane structural properties of polysulfone (PSf) membrane which in turn affect the separation performance of PSf/CAP blend membrane. The PSf/CAP blend membranes were prepared by using casting solutions contain 17 wt% of polymer via wet phase inversion process. The results showed that increasing the composition of CAP in PSf/CAP blend membranes increased molecular weight cut-off (MWCO), average pore size and pore density which then increased protein solution permeate fluxes but reduced proteins rejection of PSf/CAP blend membranes. Pure PSf membranehas the lowest membrane structural properties compared to blend membranes. This characteristic contributed to decrease in protein permeation flux and increase proteins rejection.

Download Full-text

Dehydration of water/pyridine mixtures by pervaporation using cellulose acetate/ polyacrylonitrile blend membrane

Water Science & Technology ◽

10.2166/wst.2011.337 ◽

2011 ◽

Vol 63 (8) ◽

pp. 1695-1700 ◽

Cited By ~ 3

Author(s):

J. H. Lv ◽

G. M. Xiao

Keyword(s):

Cellulose Acetate ◽

Separation Factor ◽

Experimental Results ◽

Separation Performance ◽

Permeation Flux ◽

Feed Concentration ◽

Blend Membrane ◽

Pyridine Solution ◽

Operation Temperature

Cellulose acetate/ polyacrylonitrile (CA/PAN) membranes were prepared and used to separate pyridine / water mixtures by pervaporation. The membranes were characterized through SEM. The effects of feed concentration, operation temperature and downstream pressure on the separation performance were evaluated. Experimental results indicated the increase of operation temperature could raise the permeation flux and the separation factor, while increasing feed concentration and downstream pressure would raise the separation factor and decrease the permeation flux. Under the conditions that pyridine solution was 99 wt.%, operation temperature was 323 K and downstream pressure was 20 mmHg, the CA/PAN blend membrane showed its best separation performance that the permeation flux was 56 · g · m−2 h−1 and the separation factor was 182.

Download Full-text

Molecular simulation and experimental study on the inclusion of rutin with β-cyclodextrin and its derivative

Journal of Molecular Structure ◽

10.1016/j.molstruc.2022.132359 ◽

2022 ◽

pp. 132359

Author(s):

Jingya Liu ◽

Sidian Zhang ◽

Xiuying Zhao ◽

Yi Lu ◽

Meng Song ◽

...

Keyword(s):

Experimental Study ◽

Molecular Simulation

Download Full-text

Enhanced separation performance of PVDF/PAN blend membrane based on PVP tuning

Desalination and Water Treatment ◽

10.1080/19443994.2015.1051123 ◽

2015 ◽

Vol 57 (26) ◽

pp. 12090-12098 ◽

Cited By ~ 5

Author(s):

Arezou Anvari ◽

Aliakbar Safekordi ◽

Mahmood Hemmati ◽

Fatemeh Rekabdar ◽

Maryam Tavakolmoghadam ◽

...

Keyword(s):

Separation Performance ◽

Blend Membrane

Download Full-text

Experimental Study and Analysis of Different Air-Injecting Segment on the Separation Performance of Air-Injected De-Oiling Hydrocyclone

Volume 4: Ocean Engineering; Offshore Renewable Energy ◽

10.1115/omae2008-57966 ◽

2008 ◽

Author(s):

Minghu Jiang ◽

Dehai Chen ◽

Lixin Zhao ◽

Liying Sun

Keyword(s):

Experimental Study ◽

Theoretical Analysis ◽

Separation Efficiency ◽

State Of The Art ◽

Experimental Studies ◽

Separation Performance ◽

Research Results ◽

Compound Body ◽

Oil Gas

Developing state-of-the-art and separating principle of deoiling hydrocyclones are introduced. By theoretical analysis, the ways to enhance hydrocyclone’s separation efficiency are described. One way is to inject air into the hydrocyclones so as to combine with oil to form oil-gas compound body, and then increase de-oiling efficiency. By means of injecting air into large cone segment, or fine cone segment of the hydrocyclone, experiments were carried out. It is found that the best injecting part is fine cone segment. Further experimental studies were continued for confirming detail part in fine cone segment, which includes one-third segment and two-thirds segment for the sake of research. Results show that the best air-injecting part is the first one-third segment of fine cone segment. This conclusion would be useful for understanding of air-injected de-oiling hydrocyclone’s separating process, and for its design and applications.

Download Full-text