▎ 摘　　要

NOVELTY - A smart mask comprises smart woven fabric woven from two kinds of yarns and an outer non-woven fabric. The two kinds of yarns comprise yarn without deposition of gas-sensitive material deposition, and yarn with deposition of gas-sensitive material. The smart woven fabric is tightly stitched on outer non-woven fabric to form a mask. The smart woven fabric is located near nose of human body, so that it directly touches breathing gas of human body, and it deforms and frictions continuously with breathing function of human body. The yarns with deposition of gas-sensitive materials are used as friction layer, gas-sensitive layer, and electrode layer, and the triboelectricity of yarns without deposition of gas-sensitive materials with a different sequence are knitted to form several contact-separated friction nanogenerator arrays. The expansion and contraction of the two kinds of yarns by human body's exhaled airflow form common detection of breathing function and breathing gas. USE - Smart mask for self-driven breathing monitoring. ADVANTAGE - The smart mask is prepared by a simple process. The smart mask is fully dependent on the continuous mechanical energy in the process of human breathing, and does not require external power supply at all. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the smart mask, which involves (1) preparing two bundles of 30-60 m yarn, 12 mol/L concentrated hydrochloric acid, aniline and ammonium persulfate with different friction electrode sequences, (2) taking deionized water and concentrated hydrochloric acid according to a volume ratio of 5:1 to prepare 2 mol/L dilute hydrochloric acid, (3) using electronic balance to weigh 0.244-0.488 g ammonium persulfate, and pouring it into 10-50 mL dilute hydrochloric acid for ultrasonic dispersion to form an ammonium persulfate dispersion, (4) injecting 1-2 mL of aniline into the remaining dilute hydrochloric acid in an ice bath environment, adding ammonium persulfate dispersion in drops with constant stirring, (5) adding bundle of polyester yarns to mixed solution to make aniline self-polymerize into polyaniline on the polyester yarns when the solution turns to light blue, (6) taking out the polyester yarn when the solution turns dark purple and drying, (7) using the double yuan needle method, spinning the polyester yarn coated with polyaniline and pure polyester yarn into 2-5 cm2 smart woven fabric, stitching on the hollow non-woven fabric of the mask without overlapping.