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

Abstract

Based on the sheath-core bicomponent composite fibers with modified polystyrene (PS) and the modified polypropylene (PP), composite fibers obtained were further cross-linked and sulphonated with chlorosulphonic acid to produce strong acidic cation ion exchange fibers. The structures of the fibers obtained were characterized using Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) etc. The optimal technology of the fibers obtained is discussed. The static absorption capacity of the sheath-core bicomponent composite cation exchange fibers for Zn 2 + , Cu 2 + was determined. The absorption kinetics and major factors affecting the absorption capacities of Zn 2 + , Cu 2 +were studied, and its chemical stability and regenerating properties were probed. The results suggest that cation exchange fibers with better mechanical properties and higher exchange capability were obtained. Moreover, this type of ion exchange fiber has good absorption properties and working stability to various metal ions. Hence, they have higher practicability.

Fabrication of electrospun polyacrylonitrile ion-exchange membranes for application in lysozyme adsorption

“…It is widely used in dyes, precious metals, protein pharmaceuticals and other high value-added materials during the enrichment and purification; it is also used in wastewater and gas decontamination processes. The potential benefits and value to researchers cannot be overlooked [7][8][9][10][11].…”

A new hybrid ion exchanger: Effect of system parameters on the adsorption of vanadium (V)

“…mass of dry ion exchanger ×100 (13) where N NaOH and N HCl are the normality and V NaOH and V HCl are total volume of used NaOH and HCl for the titration, respectively. For measuring the flow resistance of HIE, the sample was put into the column with 50 mm inner diameter and pure water was fed into the column with constant flow rate by centrifugal pump, and then the pressure drop was recorded.…”

“…Removal of metal ions using ion exchange fiber has recently been investigated to overcome the disadvantages of ion exchange bead, which has a good selectivity on metal ions, but also have processing limitations such as high bed pressure drop and long treatment time [12][13][14][15][16][17][18]. However, ion exchange fibers with high adsorption rate of metal ions have low packing density, which leads in a decrease in the ion exchange capacity.…”

Synthesis, characteristics and adsorption properties of polyphenylene sulfide based strong acid ion exchange fiber

“…Except for radiation grafting, melt spinning, electrospray and other composite technology are used to preparation of strong acid IEF. For example, sheath‐core composite ion exchange fiber, perfluorosulfonated ion exchange fiber and cationic exchange fiber based on PS fabric were obtained in recent years. However above fibrous adsorbents have low ion exchange capacity, usually.…”