| With the development of social economy,China's auto industry has entered a period of rapid development.The automotive interior material industry has made great progress,and it plays an indispensable role in the field of industrial textiles.Unlike traditional textiles,the auto-interior decorative polyester fabrics need to have the functions of water repellent,oil repellent,anti-fouling,self-cleaning,washable and wear-resistant.However,at present,automotive interior textiles don't have the above comprehensive performance.In the process of water and oil repellent finishing,there are many problems,such as environmental pollution,tedious finishing process and oil repellent performance is unsatisfactory.This paper combined the environment-friendly plasma treatment technology,bionic technology and Nanotechnology.The water and oil repellent polyester fabrics were prepared by various ways,and the superhydrophobic properties and other related properties of the finished fabrics were tested and analyzed.First,the surface of polyester fiber was etched and chemically activated by alkali pretreatment,then fluorinated silane with low surface energy was used to treat polyester fabrics.The surface micro morphology,wettability,oil repellency,stain resistance,characteristic functional groups,whiteness,breathability and moisture permeability of polyester fabrics before and after finishing were tested and analyzed.SEM showed that the finished polyester fiber had etching grooves and some particles were evenly attached on the surface.After the treatment of alkali deweighting and fluoroalkylsilane,with the increase of NaOH mass fraction and treatment time,the surface contact angles of polyester fabrics increased first and then decreased.After the treatment of alkali deweighting and fluoroalkylsilane,the surface static water contact angle of polyester fabric reached the maximum value of 152.5 degrees,and the rolling angle was 9.8 degrees,so as to achieve super hydrophobic effect.The oil repellent grade was 5,and the pollution resistance grade was 5.The FT-IR results showed that after the treatment of alkali deweighting and fluoroalkylsilane,there are-CH3,-CF2-and Si-O groups on the surface of polyester fabric.It showed that after alkali decrement pretreatment,active groups were introduced on the surface of polyester fiber to activate the material surface.When the fabrics were treated by fluoroalkylsilane,it would promote the adsorption of low surface energy finishing agent on the surface of the material.The combined finishing had no obvious effect on the whiteness,moisture-permeability and breathability of the fabric,and the original properties of the fabric were basically maintained.Secondly,super hydrophobic polyester fabric was prepared by constructing TiO2micro/nano structure on the surface of polyester fiber.Nano TiO2 was generated in-situ on the surface of polyester fibers by sol-hydrothermal method.Then nano TiO2was modified with fluoroalkylsilane finishing agent to obtain the fabric with low surface energy.XRD results showed that anatase phase structure of nanoscale TiO2was generated on the surface of polyester fibers.It was found by SEM that after the in-situ formation of nano TiO2,there were a large number of micro/nano TiO2 on the surface of polyester fiber.After the finishing treatment of nano TiO2-fluoroalkylsilane,the super hydrophobic coating was generated on the surface of polyester fiber.Water resistance test showed that after 30 standard washing,the contact angle of polyester fabric decreased from 153 degrees to 144.5 degrees,indicating that it still had better water repellent performance.The ash test showed that the polyester fabric treated by in-situ TiO2-fluoroalkylsilane had self cleaning ability and the pollution resistance grade was 5.EDS and mapping showed that after the treatment of in-situ TiO2-fluoroalkylsilane,there were Ti,F and Si elements on the surface of the polyester fiber.FT-IR found that after the treatment of in-situ TiO2-fluoroalkylsilane,there were-CH3,-CF2-,Si-O and Ti-O groups on the surface of polyester fabric,which showed that the surface of the polyester fabric had nano TiO2 and fluorinated substance with low surface energy.Anti UV performance test showed that in the UVA section,compared with the original sample of polyester fabric,the UV transmittance of the finished fabric decreased from 3.07%to 0.63%.It proved that the polyester fabric finished by nano TiO2-fluoroalkylsilane has anti UV property.Finally,argon plasma dielectric barrier discharge?DBD?combined with fluoroal-kylsilane was applied to treat polyester fabric,and after finishing,the polyester fabric was superhydrophobic.SEM test showed that after finishing treatment of DBD-fluoroalkylsilane,the surface of polyester fabric had obvious finishing agent attachments.However,the surface of polyester fabric directly treated with super hydrophobic finishing agent didn't change significantly.The static water contact angle test showed that with the increase of plasma treatment time,the contact angle of polyester fabric after finishing treatment increased first and then decreased.After the treatment of DBD-fluoroalkylsilane,the polyester fabric had excellent water and oil repellent resistance.When the plasma treatment time is 2 min,the static water contact angle and rolling angle of the polyester fabric surface were 152 and 9.6 degrees respectively,the oil repellency level was 6,and the pollution resistance grade was 5.EDS analysis results showed that compared with polyester treated only by fluoroalkylsilane finishing agent,the fiber treated by DBD-fluoroalkylsilane had more F and Si elements,which proved that plasma pretreatment was beneficial to the deposition of superhydrophobic agent on the surface of polyester fabric.The wear resistance test showed that after 1500 rings wear,the contact angle of polyester fabric treated by DBD-fluoroalkylsilanethe was 130 degrees.There was no obvious change in the whiteness,permeability and moisture permeability of the polyester fabric treated with DBD-fluoroalkylsilane. |
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