▎ 摘　　要

NOVELTY - Preparing elastic yarn with nano-composite functional material attached to its surface, comprises e.g. (1) dissolving carbon nanomaterials in dispersant, and ultrasonically dispersing them uniformly to prepare a carbon nanomaterial dispersion liquid; (2) dissolving the elastic high polymer in a dispersant, and stirring to prepare an elastic high polymer solution; (3) mixing and stirring the carbon nanomaterial dispersion liquid and the elastic high polymer solution, and ultrasonically processing, to prepare a uniformly dispersed nano-composite functional material; (4) soaking elastic yarn in ethanol solution for pretreatment; (5) passing the pretreated elastic yarn through dip dyeing device in which the elastic high polymer solution is placed at certain speed, and then through thermosetting treatment to make it in a semi-cured state; and (6) roughening the elastic yarn obtained in the above (5), so that the surface of the semi-cured elastic polymer is uneven. USE - The method is useful for preparing elastic yarn with nano-composite functional material attached to its surface. ADVANTAGE - The elastic yarn: has super flexibility and mechanical properties, higher sensitivity to external pressure and tensile strain, and wider detection range; integrates the fabric flexibility, comfort and lightness of wearing performance, and can achieves pressure sensing and strain sensing performance at same time. DETAILED DESCRIPTION - Preparing elastic yarn with nano-composite functional material attached to its surface, comprises (1) dissolving 0.01-0.2 wt.% carbon nanomaterials in dispersant, and ultrasonically dispersing them uniformly for 0.1-2 hours to prepare a carbon nanomaterial dispersion liquid; (2) dissolving the (0.2-2 wt.%) elastic high polymer in a dispersant, and stirring for 0.1-3 hours to prepare an elastic high polymer solution; (3) mixing and stirring the carbon nanomaterial dispersion liquid and the elastic high polymer solution for 0.5-2 hours, and ultrasonically processing for 0.1-2 hours, to prepare a uniformly dispersed nano-composite functional material; (4) soaking elastic yarn in ethanol solution for 1-60 minutes for pretreatment; (5) passing the pretreated elastic yarn through dip dyeing device in which the elastic high polymer solution is placed at certain speed, and then through thermosetting treatment to make it in a semi-cured state; (6) roughening the elastic yarn obtained in the above (5), so that the surface of the semi-cured elastic polymer is uneven; (7) passing elastic yarn obtained in the step (6) through dip-dyeing device with the nano-composite functional material at a certain speed, so that a layer of nano-composite material is attached to the surface, subjecting to thermosetting treatment, to prepare elastic yarn with the nanocomposite functional material attached to the surface, this step can be repeated several times as needed. INDEPENDENT CLAIMS are also included for: Elastic yarn with a nano-composite functional material attached to the surface, comprising elastic yarn, and surface of the elastic yarn is sequentially attached with an elastic high polymer layer and a nano-composite function material layer. Preparing the flexible fabric sensor comprising (9) using the loom weaving process, using the elastic yarn attached with the nano-composite functional material as weft yarn, using ordinary yarn as warp for weaving, obtaining elastic fabric with nano-composite functional materials attached to the surface; and (10) cutting a functional fabric of suitable size from the large-area elastic fabric prepared in step (9), preparing flexible electrode by physical contact to realize electrical connection, and preparing the flexible fabric sensor based on elastic fabric by assembling.