▎ 摘　　要

NOVELTY - A pH change sensing fiber (100) comprises working electrode (110) comprising conductive filler and pH-sensitive filler in a polymer matrix; and reference electrode (120) including a metal wire in the metal salt/polymer complex. USE - A pH change sensing fiber for pH change sensor (claimed). Can be applied to clothes, wrist guards, smart bands, etc. ADVANTAGE - By adding an oxide film-like polishing stopper, the oxide film polishing force is significantly lowered, and a high selectivity can be realized. The pH change sensing fiber can be worn conveniently by increasing flexibility, and can increase skin adhesion, so that the pH of the skin secretion can be measured more accurately. In addition, breathability is ensured, so that the wearability can be improved when applied to the human body. The pH change sensor may be easy to handle, inexpensive, and have high electrical conductivity and flexibility. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a pH change sensing fiber. PH change sensing fiber (100) Working electrode (110) Reference electrode (120)