▎ 摘　　要

NOVELTY - Preparing a flexible gas sensing material involves mixing polylactic acid, chloroform, and graphene with a proper mass ratio. Ultrasound is performed on the mixed solution for 30 minutes, and a 4.0x 4.0cm2 cotton gauze material washed with ethanol solution is immersed into the ultrasonic mixed solution, allowed to stand for an appropriate time, and taken out to dry for later use. Ammonium persulfate is added to a certain volume of 2.0mol/L hydrochloric acid (HCl) solution, the cotton gauze material is immersed in the solution, and allowed to stand for 1 hour. 20.0mL of 2.0mol/L HCl solution is added to 400.0 mu L of aniline to the glass bottle, the mouth of the glass bottle is covered with the cotton gauze material, sealed with plastic wrap, closed the lid, the glass bottle is placed in an ice bath to react for an appropriate time, and then the prepared sensing material is placed in an oven at 40 degrees C and dried for 12 hours to obtain a high-sensitivity flexible gas sensing material. USE - Method for preparing flexible gas sensing material that is used for indoor ammonia detection, indoor decoration, environment monitoring, medical appliance, and agricultural production. ADVANTAGE - The flexible gas sensing material accurately and quickly detects the concentration change of the ammonia gas and realizes detecting gas under the diversified gas environment, has high sensitivity, high stability, convenient preparation, is green and non-toxic, bendable, not limited by space.