Explanation

It is a special fiber with ion exchange function. It can be divided into cation type, anion type and zwitterion type according to the type of ion exchange group it has. ion exchange fiber has the characteristics of large specific surface and can also be used in practice in different forms (such as non-woven fabrics, membranes, etc.). The preparation method includes: bonding ion exchange groups onto the molecular chains of fibers through substitution; Graft copolymerization of monomer with ion exchange capability onto fiber or fabric; spinning a polymer containing an ion exchange group into fibers; By chemical reactions, the groups on the fiber molecular chain have ion exchange ability, etc. The H+or OH - in the ion exchange group on the ion exchange fiber is easy to selectively exchange and enrich with other ions in the liquid or gas, while purifying the liquid or gas to be treated. ion exchange fiber can be used for sewage treatment, seawater desalination, preparation of non-ionic water, gas purification, precious metals recovery, extraction of bioactivity substances, etc. Ultrafine ion exchange fibers can also be used as immobilized carriers for enzymes.

Classification