▎ 摘　　要

NOVELTY - A printed nanocomposite material comprises a polymer, a crosslinking agent that forms transient crosslinks between two or more polymer chains, and a conductive nanomaterial. The nanocomposite material is printed in the form of a film or a sheet. The crosslinking agent that forms transient crosslinks between two or more polymer chains is a weak-crosslinking agent. USE - Printed nanocomposite material used for forming printed strain sensor for bicycle frame for measuring power output of cyclist and shoes for measuring force generated by user's foot engaged in running or walking (all claimed). Can also be used for buildings, bridges, roads, paving, vehicles, dams, hulls/masts of ships, oil drilling platforms, wings/fuselage of planes, train rails, fans (turbines, cooling systems and windfarms), bridge cables and non-invasive wearable devices for monitoring human blood biochemistry. ADVANTAGE - The printed nanocomposite material has high gauge factor and conductivity and provides the printed strain sensor having high performance. The sensor is prepared economically and quickly. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) printed strain sensor, which comprises the printed nanocomposite material which is optionally on at least a portion of a surface of a substrate; (2) manufacture of the printed strain sensor, which involves printing the nanocomposite material onto the substrate in the form of film, and drying the printed nanocomposite material and optionally applying polymer, copolymer, elastomer, or thermoplastic, to the printed nanocomposite material after drying to encapsulate the sheet or film. The nanocomposite material is optionally printed in the shape of a predetermined pattern; (3) method of measuring power output of a cyclist, which involves measuring a strain, using the printed sensors, exerted by a cyclist on a bicycle frame. The printed sensors are on the bicycle frame; and (4) method of measuring force generated by a user engaged in running or walking, which involves measuring a force applied by a user's foot to one or more of the printed sensors present inside a shoe worn by the user.