Preparation Of Ultra-fine CuO And Its Antibacterial Performance Study On Cotton And Polyamide Fiber

The properties of materials were closely related to the structure and size.As a polar inorganic antibacterial material,the application of CuO was greatly influenced by its particle size and dispersity in the textile field.How to prepare nanoscale powders with small size and uniformity to further application in the field of natural fibers and synthetic chemical fiber had been a popular topic in the field of nano-functional textiles.In response to the above problems,this paper had made a change based on the former existing research.And the copper oxide nanoparticles were successfully prepared with good dispersivity and small size by using a mild hydrolysis method.Then through the method of finishing and blending,CuO nanoparticles were composted with cotton fiber and polyamide particles to obtain the antibacterial cotton fiber and polyamide fiber.The main study and conclusion are as follow:(1)Preparation of the CuO with small size and super dispersion.CuO nanoparticles were successfully prepared by hydrolysis method via using cupric acetate as copper source,polyvinylpyrrolidone as surfactant and anhydrous ethanol as solvent.The samples were characterized by XRD,TEM,particle size and Zeta potential.The results showed that the prepared CuO size was 2~6 nm,with good dispersity and narrow particle size distribution.CuO nanoparticles with different particle sizes were prepared by changing reaction solvent and surfactant.(2)Antibacterial and photocatalytic performance evaluation of CuO with super-dispersive and small size.The preparation of ultrafine CuO nanoparticles were valued the antibacterial property.The results showed that CuO had a good inhibitory effect on E.coli and S.aureus.For different size of CuO particles,the minimum inhibitory concentration(MIC)and minimum bactericidal concentration(MBC)were tested.The results displayed that the smaller CuO nanoparticles were,the lower MIC and MBC values were and the better antimicrobial property was.On this basis,we also made a simple discussion on the antibacterial mechanism of CuO,proving that CuO antibacterial properties are not influenced by copper ions precipitated from the solution.Finally,photocatalytic experiments of ultrafine CuO were conducted,and the degradation rate was only 70% after 4 h degradation of methyl blue in visible light.The results showed that the photocatalytic effect was not significant.(3)Antibacterial high performance and evaluation of nano-CuO composite cotton textiles.Namely,the preparation of CuO suspension was directly diluted with deionized water to 100 ppm,50 ppm and 25 ppm.Then the cotton fabric was treated by rolling(mangle rate 100%)-dried(70?)-baked(135?)of finishing process.The fabric was characterized by FT-IR and SEM-EDS.It was proved that CuO was evenly distributed on the fabric and the treated fabric had a very uniform color.The treated fabric were tested the antibacterial property,the result shows that the treated fabric had good antibacterial properties against the E.coli and S.aureus when the concentration of CuO to 50 ppm Escherichia.And the antibacterial rate reached 99%.For its antibacterial durability test,the result showed that the treated fabric by 50 ppm CuO suspension had some degree antibacterial durability(20 times).It may be due to size small and big specific surface area,the CuO nanoparticles was strongly absorbed to the fiber and penetrating agent together with the polymer adhesive.(4)Processing and performance test of nano-CuO composite functional nylon fiber.The CuO nanoparrticles were mixed with polyamide particles at 5% and 2% quality concentration to obtain the CuO-polyamide particles.Then the CuO-polyamide fiber was obtained by blended spinning with CuO-polyamide particles at 10% rate.The polyamide fiber was tested by FT-IR,SEM,EDS and tensile strength testing.The results show that there was no different the CuO-polyamide fiber composite fibers from the ordinary on the microstructure and mechanical properties.The antibacterial test of composite fiber showed that the polyamide fiber with 5% quality concentration had excellent antibacterial property(98% antibacterial rate)and antibacterial durability(50 times).An effective method was provided for preparing the small size,uniform nanoparticles materials in this paper.Its provided a feasible way for nanoscale CuO applied in cotton/polyamide fiber for the antibacterial function of processing.And the antibacterial mechanism of nano-functional textiles was further revealed.