Printing And Durability Study Of UV-curable Silver-based Composite Conductive Coating On Cotton Fabri

Conductive textiles have been widely used in health monitoring,military aerospace,recreation and other fields.In practical application,conductive textiles will inevitably undergo stretching,bending,washing and other processes.Improving the washing resistance and stability of conductive textiles is the premise of expanding its application range.In this paper,Ag@PPy and Ag@rGO composites were successfully synthesized in solution.The results showed that Ag@PPy presented an eccentric coreshell shape,with an average hydrodynamic diameter of 316.9nm and a Zeta potential value of-8.1 m V.In Ag@rGO,rGO was rich in folds and thin curtains,and spherical Ag nanoparticles were evenly distributed on the surface,with an average hydrodynamic diameter of 905.98 nm and a Zeta potential value of-0.437 m V.Then,the durability of conductive coating was improved by adding polymerizable surfactant DNS-86 into conductive material or modifying cotton fabric with silane coupling agent KH580.First,DNS-86 was added to the conductive material so that it could crosslink with the photocured resin PUA during the photocuring process,thus improving the durability of the conductive coating.The results showed that DNS-86 can improve the stability of Ag@PPy and Ag@rGO in solution and reduced their particle sizes under certain dosage.Ag@PPy and Ag@rGO were characterized by FTIR,XRD and XPS.The results showed that DNS-86 has no significant effect on the chemical and crystal structure of the materials.By testing the resistance,SEM and water contact angle of the coating,it was observed that DNS-86 has little effect on the conductivity of the two conductive fabrics,but made them more uniform and more hydrophobic.However,for Ag@PPy conductive coating,excessive DNS-86 will reduce the electrical conductivity and hydrophobicity of the fabric,making the coating uneven.Finally,through bending,stretching,peeling and wet treatment,it was observed that the addition of DNS-86 improved the structural integrity and toughness of PUA,enhanced the adhesion between the conductive coating and the cotton surface,and made it more resistant to various environmental erosion.Secondly,the cotton fabric was modified with KH580,so that it could cross-link with PUA during the photocuring process,thereby improving the durability of the conductive coating.The results of FTIR,XRD,XPS,brightness and water contact angle test showed that KH580 successfully modified cotton fabric,and increased crystallinity,decreased brightness and enhanced hydrophobicity of cotton fabric.By testing the resistance of the coating,it was found that the introduction of KH580 had no adverse effect on the electrical conductivity of Ag@PPy and Ag@rGO coating,and and made them evenly printed on the cotton fabric.Finally,the flexibility,mechanical durability and wet handling ability of the two conductive coatings were evaluated by bending,stretching,peeling and wet treatment tests.The results showed that the modification of KH580 significantly enhanced the mechanical durability and wet durability of the two conductive coatings,which still had good temperature sensing,photothermal conversion and strain response properties after wet treatment.