The Application Of Atmospheric Pressure Plasma Technology In Wool Pretreatment And Research On Its Performance

The reason for the felting of wool fabrics is the existence of the scale layer on the surface of the wool fibers,which makes the wool fibers produce a poor reverse friction effect under the action of the moist heat environment and external force.The anti-felting process of wool fabrics is mainly divided into two ways: one acts on the surface scale layer structure of wool,which is usually destroyed by physical or chemical methods,thereby reducing the influence of the differential friction effect;the other It controls the unidirectional movement of wool fibers by reducing the mutual movement frequency of wool fibers in wool fabrics,thereby reducing the felt shrinkage of wool fabrics.The felting problem of wool greatly limits its development and application.Therefore,it is an important research direction to study how to remove the scales on the wool surface and reduce the felt shrinkage of wool fabrics in a way that is environmentally friendly and has a low damage rate to wool.This paper mainly studies the following contents:This paper mainly uses atmospheric pressure plasma technology combined with hydrogen peroxide to pre-treat wool,and by grafting nano-chitosan to the surface of wool fabrics,so as to improve the dyeing properties,anti-felting properties,mechanical properties and antibacterial properties of wool fabrics.(1)First of all,by changing the working gas,voltage,duty cycle and other parameters of atmospheric pressure plasma to explore whether atmospheric pressure plasma is feasible for wool fabric pretreatment.The experimental results show that the treated wool fabric is strong and anti-felt.The shrinkage performance has been improved,and each parameter is different,which will also affect the final treatment effect.The strength of the treated fabric is increased by nitrogen plasma,and the felt shrinkage rate is the smallest by oxygen plasma.The comprehensive mechanical properties of the fabric and Considering the anti-felt performance,oxygen and nitrogen plasma were selected for subsequent experiments.The optimal process parameters were: working voltage 260 V,duty cycle 40%,and frequency19 k Hz.(2)Follow-up experiments were carried out based on the best plasma parameters to explore the effects of working gas and hydrogen peroxide concentration on the dyeing properties,mechanical properties,moisture absorption properties and anti-felt properties of fabrics.Dyeing performance,hygroscopic performance and anti-felting performance,but mechanical properties will be reduced;due to plasma treatment will improve the mechanical properties of fibers,hygroscopic performance,and will etch the surface of wool fibers,reducing the oxidation of wool scales by hydrogen peroxide layer resistance.Therefore,the composite treatment of hydrogen peroxide and atmospheric pressure plasma will greatly improve the properties of the fabric,and the optimal process parameters will be finally obtained: the working gas is oxygen,and the concentration of hydrogen peroxide is 0.5%wt.(3)Antibacterial finishing based on pre-treated wool fabrics,chitosan and nanochitosan were used to compare,and different polymerization methods were used at the same time.The results showed that nano-chitosan has better performance than chitosan.Nanochitosan has the advantages of large specific surface area,small particle size and strong adsorption capacity.At the same time,it also has the advantages of strong affinity for protein and antibacterial properties.Finally,nano-chitosan was selected for antibacterial finishing of wool fabrics by argon plasma polymerization.The experimental test results show that:(1)Plasma technology can etch the scales on the surface of wool fibers,which improves the anti-felting performance and strength of wool fabrics;(2)The combined treatment of wool fabrics with plasma technology and hydrogen peroxide is better than single treatment.Plasma significantly improved the antifelting properties,dyeing properties and wetting properties of wool fabrics;(3)Soaking nano-chitosan solution and argon plasma treatment imparted antibacterial properties and better anti-felting properties to wool fabrics performance.