▎ 摘　　要

NOVELTY - Breathing sensor based on graphene composite material comprises a flexible base layer, a core sensitive layer and a packaging layer, where the flexible base layer is provided with wire and electrode, the lower surface of the core sensitive layer is set on the flexible base layer, the upper surface of the core sensitive layer is encapsulated by the packaging layer, and the flexible sensitive layer is formed by curing graphene, polyaniline and polydimethylsiloxane. USE - The breathing sensor based on graphene composite material is used in device for detecting breathing rate (claimed) for evaluating attribute of lung function, and in respiratory monitoring system. ADVANTAGE - The breathing sensor can respond to human breath quickly, improves respiratory response frequency, isolate influence of breath humidity, and improves accuracy of the respiration monitoring, the flexible substrate layer can be attached to the skin, which improves human body attachment performance, can reduce influence of the external environment temperature, and can realize real-time monitoring human respiration change to judge the human physiological state, especially the lung health condition. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the breathing sensor based on graphene composite material, which involves (i) mixing graphene and polyaniline, adding polydimethylsiloxane and curing agent, and thoroughly stirring to obtain a suspension, (ii) stirring the suspension until becomes viscous and pouring to the flexible base layer, and placing on a heating table for heating and curing to obtain the core sensitive layer, and (iii) encapsulating the core sensitive layer by the packaging layer to obtain the flexible breathing sensor.