HYDROGEN PEROXIDE PERMSELECTIVE MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a new technique capable of obtaining an ultrathin membrane suitable for use in the guard film of the electrode of an enzyme sensor or the like, having excellent permselectivity against a specific gas and showing a rapid response. SOLUTION: A Langmuir-Blodgett's method is utilized to develop a vinyl polymer having a siloxane region and an epoxy group or an aldehyde group in its side chain on the surface of the water to compress the same and, thereafter, a polymer having an amino group is injected in the region under the surface of the water to react the amino group with the epoxy group or the aldehyde group to obtain the hydrogen peroxide permselective membrane comprising a monomolecular membrane of a two-dimensionally crosslinked siloxane- containing vinyl polymer. This ultrathin membrane is suitably used as the guard film of the electrode of a sugar sensor.