Inventors: Kanekiyo Y, Osanawa R, Tao H, Nakazato T, Torimura M
Patent Title: Chemical substance adsorbing/removing material having pH responsiveness
Publication date: 2004
Publication number: JP2004255236

Abstract: PROBLEM TO BE SOLVED: To provide an adsorbing/removing material which is obtained by using a natural resource as a base material, has highly functional recognizability on a molecular level, and selectively adsorbs various chemical substances, and from which the adsorbed chemical substances are easily desorbed. SOLUTION: A clathrate complex is formed by using vinyl group-introduced amylose and the chemical substance to be adsorbed/removed as a template molecule. A polymeric product having a comparatively lower crosslinking density is obtained by polymerizing the clathrate complex in the presence of a crosslinking agent having pH responsiveness, namely, a functional group from/to which a proton is released/added according to pH. A template polymer being this chemical substance adsorbing/removing material is obtained by separating/removing the template molecule and the unreacted substance from the polymeric product. Since the adsorption ability of this template polymer is varied according to the surrounding pH, the chemical substance, particularly, a toxic environmental hormone-like chemical substance can be easily adsorbed on/desorbed from this template polymer.
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