How does ion exchange membrane work?
An ion-exchange membrane is a semi-permeable membrane that transports certain dissolved ions, while blocking other ions or neutral molecules. They are often used in desalination and chemical recovery applications, moving ions from one solution to another with little passage of water.
What is ion exchange membrane made of?
membranes composed of inorganic ion-exchange material and an organic polymer. In most commercially available ion-exchange membranes the matrix consists of hydrophobic polymers such as polystyrene, polyethylene or polysulfone.
How do you make an ion exchange membrane?
Homogeneous ion-exchange membranes can be prepared by polymerization of monomers that contain a moiety that either is or can be made anionic or cationic, or by polymerization of a monomer that contains an anionic or a cationic moiety, or by introduction of anionic or cationic moieties into a polymer dissolved in a …
What is ion-exchange membrane electrode?
Liquid-ion-exchanger electrodes utilize a liquid ion exchanger that is held in place in an inert, porous hydrophobic membrane. The electrodes are selective because the ion exchangers selectively exchange a single analyte ion.
Who invented Nafion?
Walther Grot
Nafion is a brand name for a sulfonated tetrafluoroethylene based fluoropolymer-copolymer discovered in the late 1960s by Walther Grot of DuPont. Nafion is a brand of the Chemours company.
How does an ISE work?
Principle of ion-selective electrode (I.S.E.) consists of a thin membrane across which only the intended ion can be transported. The transport of ions from a high conc. to a low one through a selective binding with some sites within the membrane creates a potential difference.
How is an ion exchange membrane electrically conductive?
An ion-exchange membrane is a semi-permeable membrane that transports certain dissolved ions, while blocking other ions or neutral molecules. Ion-exchange membranes are therefore electrically conductive.
How are ion exchange membranes used in desalination?
Ion-exchange membranes are therefore electrically conductive. They are often used in desalination and chemical recovery applications, moving ions from one solution to another with little passage of water. anions .
What kind of membrane is an anion exchange membrane?
Anion exchange membrane. An anion exchange membrane ( AEM) is a semipermeable membrane generally made from ionomers and designed to conduct anions while being impermeable to gases such as oxygen or hydrogen .
How are ion exchange membranes used in dialysis?
Ion-exchange membranes are traditionally used in electrodialysis or diffusion dialysis by means of an electrical potential or concentration gradient, respectively, to selectively transport cationic and anionic species.