Modification of silk fabric via atmospheric pressure plasma liquid deposition

In order to improve water and oil repellent properties of the silk fabric surface and better control the quality of deposition coating,this paper combines plasma with deposition of liquid.Uniform glow discharge forms at atmospheric pressure with a dielectric barrier discharge(DBD) in helium(He) using high frequency and high voltage power supply.Ultrasonic nozzle atomizes and sprays mist droplets containing liquid monomer directly into the plasma region to complete plasma deposition polymerization on the surface of the substrate.This technology was adopted to treat the silk fabric and ultrasonic atomization of perfluoroheptane monomer was sprayed into an atmospheric pressure glow discharge(APGD) region,leading to the deposition of the hydrophobic film on the silk fabric.The changes of fiber surface morphology and structure were analyzed by using ATRFTIR,SEM and contact angle measurement.The influences of different processing parameters on change of deposition degree of perfluoroheptane were obtained.After treatment,dense film has been deposited onto fiber surface successfully.Water contact angle and hydrophobicity of the silk fabric surface are enhanced greatly.