Preparation method of flexible wearable conductive spandex/polyurethane composite material

Abstract

The invention discloses a preparation method of a flexible wearable conductive spandex / polyurethane composite material. The preparation method comprises the following steps: step 1, soaking spandex fibers into an aniline monomer, taking out the spandex fibers for uniform extrusion after soaking for 60 s, standing, and determining the mass of adsorbed aniline in a front-back weighing manner; step 2, adding ammonium persulfate into doped acid, stirring to form a reaction solution, then adding the spandex in the step 1 into the reaction solution for sealing, and carrying out constant-temperatureoscillation reaction in a gas bath for 2 h; step 3, sequentially placing the spandex fibers reacted in the step 2 into tap water and distilled water for washing twice to obtain spandex / polyaniline conductive fibers; and step 4, fixing two ends of three equal-length conductive spandex fibers on copper wires by conductive adhesive, horizontally stretching and placing the copper wires on a polytetrafluoroethylene plate, pouring an aqueous polyurethane solution on the fibers, standing for 24 h, drying for 1 h in an oven at the temperature of 40 DEG C, curing to form a film, and cutting off the redundant part of the polyurethane film to prepare the conductive spandex / polyurethane composite material.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a preparation method of a flexible and wearable conductive spandex / polyurethane composite material. Background technique [0002] Conductive fiber is an important functional fiber, which has played an important role in the fields of static electricity elimination and electromagnetic wave absorption. With the continuous advancement of science and technology, and the continuous improvement of people's functional requirements for textiles and clothing, the application of conductive fibers in stress sensors, gas sensors, humidity sensors, smart clothing and other fields has attracted more and more attention. At present, a variety of conductive fibers such as metal fibers, carbon fibers, and conductive polymer fibers have been used in sensors and smart clothing. [0003] Combining fibers with conductive polymer aniline, making full use of the fiber material's low densi...

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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing a flexible and wearable conductive spandex / polyurethane composite material, which solves the cumbersome preparation of fiber materials from fibers and conductive polymers, and easily produces a large amount of waste liquid. By absorbing aniline monomer The method greatly reduces the demand for aniline solution, reduces the difficulty of the process, and greatly improves the sensing repeatability of the conductive fiber as a sensing device under large strain conditions

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