▎ 摘　　要

NOVELTY - Color-changing sensor (10) comprises: adhesive layer (300), catalyst layer (100), and a thermochromic layer (200); or adhesive layer, and a porous thermochromic catalyst layer; or adhesive layer, a web type catalyst layer, and a thermochromic layer, where the catalyst layer includes a porous support (111) to which metal particles (112) are bonded, and the porous thermochromic catalyst layer includes a composite structure. The composite structure includes a porous support to which metal particles are bonded. The web type catalyst layer includes a nanofiber support, and a metal catalyst is bonded to the surface of the nanofiber support. USE - The color-changing sensor for gas such as hydrogen gas detection, is used for a color-changing tape for gas detection, where the gas is selected from hydrogen gas, methane gas, ethane gas, propane gas, butane gas, and their mixtures (all claimed). ADVANTAGE - The sensor can be used in the form of a tape or a spray, is convenient to use because it detects hydrogen in the air without applying electricity, and can be used even in sub-zero temperatures and at room temperature. The sensor exhibits a reversible characteristic of recovering the original color or an irreversible characteristic of maintaining a changed color when there is no contact with the hydrogen gas by removal of the hydrogen gas, so that the presence or absence of hydrogen gas can be easily confirmed. When the sensor comes into contact with hydrogen gas, color conversion occurs so that it is possible to easily check the presence of hydrogen gas, and when the sensor is not in contact with hydrogen gas by removal of hydrogen gas, the sensor may exhibit a reversible characteristic of being restored to an original color and an irreversible characteristic of not being restored to an original color. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a color-changing tape for gas detection, comprising the color-changing sensor; and a method for manufacturing a color-changing sensor for gas detection, comprising preparing a porous support having metal particles bonded to its surface, bonding the porous support to one surface of the adhesive layer, and preparing a thermochromic layer by dissolving thermochromic particles and a binder in a solvent to prepare a thermochromic coating composition and coating one surface of a porous support to which the metal particles are bonded to a surface, or comprising preparing a composite structure in which metal particles are bonded to the surface of a porous support, preparing a thermochromic coating solution by mixing the composite structure, thermochromic particles, a binder, and a solvent, preparing a porous thermochromic catalyst layer by coating the thermochromic coating solution on PET, and bonding the porous thermochromic catalyst layer to one surface of the adhesive layer, or comprising preparing a nanofiber scaffold by spinning a nanofiber scaffold solution, preparing a web type catalyst layer by coating a metal catalyst on the nanofiber support, bonding the mesh-shaped catalyst layer to one surface of the adhesive layer, and dissolving the thermochromic particles and the binder in a solvent to prepare a thermochromic coating composition and coating one surface of the net catalyst layer containing the metal catalyst to prepare a thermochromic layer. DESCRIPTION OF DRAWING(S) - The drawing shows a diagram of a color-changing sensor for detecting gas. 10Color-changing sensor 100Catalyst layer 111Porous support 112Metal particles 200Thermochromic layer 300Adhesive layer 400Protective layer