| With the continuous improvement of the level of science and technology and people's life quality,the role and function of textiles will replace the traditional idea of covering body and keeping warm and beautifying,which is gradually evolving into a functional and intelligent composite fabric,and conductive fabric is an important part of the preparation of functional textiles.Therefore,the development of composite fabrics with excellent electrical conductivity can not only accelerate the pace of promoting the intelligent process of textiles,but also constantly promote the transformation and upgrading of the textile industry.In this project,polypyrrole is used as the conductive function item,carbon nanotubes as the synergetic conductive agent,and the surface of the fabric is modified by the methods of wet forming and chemical polymerization,so as to give the original fabric excellent conductive properties.The main research contents are divided into three aspects:?1?With the fabric as the matrix,pyrrole as the monomer,ferric chloride as the oxidant,and through simple in-situ oxidation polymerization,the polypyrrole particles were uniformly adhered on the surface of the fiber and between the fiber and the fiber to prepare the PPy/cotton conductive composite fabric.The PPy/cotton composite conductive fabric shows good mechanical properties,tensile strength can reach 58 MPa,and also has excellent conductive properties.The minimum surface resistance of the PPy/cotton fabric is 7.9?·sq-1,importantly,it is also endowed with good electrothermal properties.After applying 5 V the maximum surface temperature of PPy composite conductive fabric can rise to 168.3?,and the temperature remains stable within 3 min of observation time,and the electrical heating effect is good.?2?Polyurethane films were prepared by wet process with polyurethane as the raw material of flexible matrix,chitosan as the pore-forming agent and hydrochloric acid as the solidifying agent.Then,the flexible polyurethane/polypyrrole composite conductive film with good conductive path was prepared by in-situ polymerization with pyrrole as raw material and ferric chloride as oxidant.The prepared polypyrrole composite conductive film has excellent conductivity and good electrothermal performance.The surface resistance of polyurethane/polypyrrole is 10.5?·sq-1,and the applied voltage is 7 V,After 28 s,the temperature can rise and stabilize at 110?.In addition,when the applied voltage is 6 V,the composite membrane heater almost shows a coincident temperature curve in the period of1-10.Therefore,the excellent heating performance and perfect cycle stability further expand the application range of these composites.?3?Polyurethane chitosan solution is used as the original solution of flexible materials,and then carboxylated carbon nanotubes solution is added to polyurethane chitosan solution as dopant and conductive agent.Polyurethane chitosan carbon nanotubes solution is coated on the fabric,which is wet formed in hydrochloric acid coagulation bath,and then polymerized with polypyrrole on the composite fabric by in-situ polymerization,which has good conductivity The surface resistance of carbon nanotubes/polyurethane/polypyrrole composite conductive fabric is 11.3?·sq-1.After applying 6 V for 30 s,the temperature can rise rapidly and stabilize at 101.6?,and the electric heating effect is good. |
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