|
"Many types of ion exchange membranes are supplied and/or stored in the dry form. This means that the material needs to be hydrated prior to use. A scientist that is new to using IEMs may not realize this and put dry material into their system or prototype. Prior to using an IEM, the material must be treated or “swelled.” The swelling procedure often consists of using a type of solution with an acid, base, or salt, depending upon the material type and end use application. The material may need to sit in the aqueous solution for one to several hours and then washed with water. If required, the material may also need to be treated to convert it to the ionic form. There are also some newer materials that do not require this treatment. However, when trying a new ionic material, the steps for storage and treatment must be considered."
|
