Polyelectrolyte Complex Membranes via Salinity Change Induced Aqueous Phase Separation

ACS Applied Polymer Materials
Elif Nur DurmazWiebe M de Vos

Abstract

Polymeric membranes are used on very large scales for drinking water production and kidney dialysis, but they are nearly always prepared by using large quantities of unsustainable and toxic aprotic solvents. In this study, a water-based, sustainable, and simple way of making polymeric membranes is presented without the need for harmful solvents or extreme pH conditions. Membranes were prepared from water-insoluble polyelectrolyte complexes (PECs) via aqueous phase separation (APS). Strong polyelectrolytes (PEs), poly(sodium 4-styrenesulfonate) (PSS), and poly(diallyldimethylammonium chloride) (PDADMAC) were mixed in the presence of excess of salt, thereby preventing complexation. Immersing a thin film of this mixture into a low-salinity bath induces complexation and consequently the precipitation of a solid PEC-based membrane. This approach leads to asymmetric nanofiltration membranes, with thin dense top layers and porous, macrovoid-free support layers. While the PSS molecular weight and the total polymer concentrations of the casting mixture did not significantly affect the membrane structure, they did affect the film formation process, the resulting mechanical stability of the films, and the membrane separation properties. T...Continue Reading

References

Nov 3, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Ramamoorthy Malaisamy, Merlin L Bruening
Nov 9, 2006·Physical Chemistry Chemical Physics : PCCP·Regine V Klitzing
Feb 7, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Seong Uk HongMerlin L Bruening
Jul 1, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Maneesha Adusumilli, Merlin L Bruening
Oct 20, 2009·Biomacromolecules·Claudine H Porcel, Joseph B Schlenoff
Dec 7, 2010·Macromolecules·Haifa H Hariri, Joseph B Schlenoff
Dec 20, 2014·ACS Applied Materials & Interfaces·Jingcheng FuJoseph B Schlenoff
Feb 24, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Hadi M FaresJoseph B Schlenoff
Mar 17, 2015·Advanced Materials·Pierre Schaaf, Joseph B Schlenoff
Jun 17, 2015·ACS Applied Materials & Interfaces·Kristopher D Kelly, Joseph B Schlenoff
Sep 7, 2016·ACS Applied Materials & Interfaces·Huan ZhangNicole S Zacharia
Nov 20, 2016·Macromolecular Rapid Communications·Merid HaileJaime C Grunlan
Dec 14, 2016·The Journal of Physical Chemistry. B·Ran ZhangMaria Sammalkorpi
Aug 29, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Ryan J SmithJaime C Grunlan
Apr 10, 2019·ACS Applied Materials & Interfaces·Kazi SadmanKenneth R Shull
Aug 23, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Kohei MurakawaJian Ping Gong
Oct 4, 2019·ACS Applied Bio Materials·Irene S KurtzJessica D Schiffman
Feb 25, 2020·ACS Applied Polymer Materials·Joshua D WillottWiebe M de Vos

❮ Previous
Next ❯

Methods Mentioned

BETA
scanning
X-ray
delamination

Software Mentioned

ImageJ

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.