Study Of The Building Of Super-hydrophobic Surface Of Polyester Fabric With Atmospheric Pressure Discharge Barrier Plasma

Textiles often requires special self-cleaning properties, and super-hydrophobic nature is oneof the main performance which give the self-cleaning property of fabric, so that the study ofsuper-hydrophobic surface causes widespread concern in the academic community, especially inthe preparation of super-hydrophobic surface by initiating chemical vapor deposition andgrafting. Surface modification of materials with plasma is a kind of dry techniques without usingof large amounts of water and chemicals. Compared with conventional wet chemical techniques,it has less environmental pollution, lower cost, wider application and is easier to operate. Regularhydrophobic finishing with silicone can not give super-hydrophobic property to fabrics, thispaper introduces the super-hydrophobic finishing with atmospheric pressure plasma using air, asmall amount of argon gas, Tetramethyl vinyl Cyclotetrasiloxane (D4V) andtrifluoropropylmethylsiloxane cyclotrisiloxane (D3F) monomer.In this paper, we studied both of atmospheric plasma and two kinds of organic siliconmonomers:(1) Conducts single factor experiment, the amount of monomer, argon flux and theprocessing time have been investigated. The results show that: in the condition of amount of themonomer100%(o.w.f), argon gas flow2.0L/min, discharge voltage100V, processing time120smodified polyester can get more excellent super-hydrophobic property.(2) The super-hydrophobic property of polyesters obtained by usingtrifluoropropylmethylsiloxane cyclotrisiloxane (D3F) as modifying monomer is compared withones obtained by using tetramethyl cyclotetrasiloxane (D4V). The results show that: polyestersmodified with D3F is better than the ones modified with D4V.(3) Polyester fabrics modified with these two kinds of silicone have been tested toinvestigate performances. The results show that polyester modified with D4V and D3F in plasmahave better stiffness and smoothness, while the levels of softness and moisture permeabilityreduced slightly, though the differences of wearabilities are still within the range. After times of washing with water, modified polyester fabric still keeps good super-hydrophobic property.(4) XPS, infrared absorption spectroscopy, EDS and field emission scanning electronmicroscope are used to observe and measure the molecular groups and the characteristics offabrics before and after modification. Which is discovered is the significant deposition coatingand film on the surface of fibers. And by analyzing the experimental results, conclusions ofmechanism can be initially presumed: the ring and double bond of D4V monomer is opened andpolymerized with each other in plasma, and deposited. While the main reaction of D3F monomerare the grafting between branches which contain fluorine and polyester molecules. The results ofelemental analysis show that, Si elements and F elements are introduced to polyester fabrics in alarge amount.(5) Scavenger capture-HPLC assay has been applied to validate the generating process ofhydroxyl radical on fabrics in plasma. The results show that in plasma cotton fabrics will bebombarded and produce a certain amount of hydroxyl radicals, resulting in a certain reactivity.