Immobilized to crosslinked chloromethylate polystyrene

0 g crosslinked chloromethylate polystyrene (CMPS, degree of crosslinking 7) is added in a 250 mL three-necked flask. 30 mL cosolvent DMF which is dried by anhydrous sodium sulfate is added and allowed to swell for 10 h. Then, /3-CD which dissolved in DMF and sodium hydroxide are added in and allowed to react for 24 h under backflow at 45° C. The reactants are leached and washed with distilled water. By vacuum drying under room temperature, we gain the immobilized CD/CMPS polymer. Through the test, it can be found that /3-CD is immobilized to CMPS by ether bond in alkaline medium. The immobilization reaction occurs between chloromethyl of the carrier and the hydroxyl of /3-CD. 

Compared with the carrier, the immobilization is better at hydrophilicity, chemical stability and thermal stability aspects. This polymer can be used in wastewater treatment which can remove metal ions and organic pollutants at the same time and can be reused through deabsorption. 

---