Entrapped β-cyclodextrin polymer and a method of preparing the same

A method of preparing entrapped β-cyclodextrin polymers, the method comprising:

• preparing β-cyclodextrin polymers in a gel state by dissolving β-cyclodextrin in an aqueous alkali solution and adding epichlorohydrin to the solution;
• preparing entrapped β-cyclodextrin polymers by immersing the β-cyclodextrin polymers in a gel state in a metal salt solution followed by entrapping on the surface of the β-cyclodextrin polymers;
• and
• washing, drying and pulverizing the entrapped polymers to powderize the entrapped β-cyclodextrin polymers
• wherein the metal salt is selected from the group consisting of CaCl2, NaCl, Ca(NO3)2 and CaSO4.