Studies on the Meusurement of Tea Polishing Grade

Research on preparation of sheath-core bicomponent composite ion exchange fibers and absorption properties to metal ion

“…The ion exchange fibers are suitable for adsorption separation of toxic metal ion and selective concentration of the trace element because of its faster rate of exchange and elution, so they are applied as higher efficient adsorption separation materials. [3][4][5][6][7][8] The sheath-core bicomponent composite ion exchange fiber made from modified PS 9 as sheath and the modified PP 10-12 as core is successfully obtained, it has some advantages, such as lower manufacture cost, simple process, good usage of the existing facilities etc, so it is a new type of ion-exchange fiber method with promising prospects. But the compatibilization of sheath-core fiber is so bad that its functionseses is different from that of original fiber, so that the mechanics functionseses of the fiber with lower exchange capacity can not be suitable for the needs in the post-treatment step.…”

Preparation of sheath–core bicomponent composite ion‐exchange fibers and their properties

“…Ion‐exchange fibers have a bigger exchange capacity and faster rate of exchange and elution than ion‐exchange resins. They can be applied in many kinds of forms, can be applied to various processes of exchange,1, 2 and can be applied in many areas, such as environment protection, environmental monitoring, and resource exploitation 3–8. A sheath–core bicomponent composite ion‐exchange fiber made from modified polystyrene (PS) as the sheath and modified polypropylene (PP) as the core has been successfully obtained, and it has some advantages, such as lower manufacturing costs, a simple process, and good use of the existing facilities, so it represents a new type of ion‐exchange‐fiber method with promising prospects.…”