| 摘要 |
PURPOSE:To obtain the subject ion-exchange fiber having extremely high ion- exchange speed and exhibiting remarkable effect in the ion-exchange and adsorption separation in dilute state by graft-polymerizing ion-exchange group to ultrafine fibers. CONSTITUTION:An ultrafine fibrillated fibers having a fiber diameter of 0.00001-0.1mum are produced by spinning a multicore sea-island type composite fiber composed of polyester, polyamide, etc., drawing said composite fiber and removing the sea-component from the product. The fibrillated ultrafine fiber is immersed in an acidic vinyl monomer having carboxyl group, preferably a solution of a mixture of acrylic acid and methacrylic acid and the monomers are polymerized to obtain an ultrafine ion-exchange fiber containing cation- exchange group introduced into the fiber. Since the obtained fiber has large specific surface area and extremely high ion-exchange rate, it can be suitably applied in a wide application field such as the softening of water, desalination of sea water and removal of harmful metals. |
