The invention relates to the technical field of
spinning and sensing. In order to solve the problems that an existing
hydrogen sensor is poor in selectivity, prone to being affected by common gas such as
methane, large in
system error and low in detection sensitivity, the invention particularly discloses a nano-
film resistance type three-dimensional
hydrogen sensor and a preparation method thereof. A plurality of
signal transmission lines are arranged between the upper base cloth and the lower base cloth, the
tail end of each
signal transmission line is connected with a fluff cluster piece, and the fluff cluster pieces sequentially penetrate through the upper base cloth and the lower base cloth; the
raw material of the villus
tufting piece comprises modified
polyimide fibers with the surface loaded with a
palladium-gold material, the thickness of the
palladium-gold material is 5-12 nm, and the villus gap of the villus
tufting piece is smaller than or equal to 5 nm. By performing specific selection, modification treatment and the like on a fluff cluster piece material and combining a
textile process, array arrangement of sensitive materials is realized, the limitation of a
rigid structure of a traditional
hydrogen sensor is broken through, and the sensor has the advantages of high sensitivity, quick response, customizable structure and the like.