Preparation Of Bimetallic Nano Antibacterial Agent And Its Application On Seaweed Fiber

With the progress of society and the improvement of people's living standards:people's requirements for the antibacterial properties of textiles are constantly increasing,and the market share of textiles with antibacterial functions is increasing.Silver nanoclusters and copper nanoclusters with broad-spectrum antibacterial effects have attracted more attention from industry insiders.Algae fiber is a kind of natural polymer fiber made by dissolving sodium alginate in water and wet spinning.It is also called sodium alginate fiber,because sodium alginate fiber has good The liquid absorption,good flame retardancy and other advantagesits research and application are also increasing.Different from the nano-element antibacterial agents studied in the past,a series of PdCu,PdAg:silver nanowires(Ag NWs),silver nanospheres(Ag NSPs)A series of bimetallic antibacterial agents such as PdAg NWs:and their structures and properties were characterized and analyzed.And by blending it with sodium alginate spinning solution,using wet spinning technology to prepare a series of blended antibacterial algae fiber,and by comparing with sodium algimte fiber,the analysis of the introduction of nano antibacterial agent on algae The influence of sodium fiber morphhology,antibacterial properties and mechanical properties The internal structure of the nano antibacterial agent was studied by means of SEM,TEM and XPS.Different from the morphology of other prepared bimetallic nano-antibacterial agents,the PdAg and PdCu nano-antibacterial agents prepared by using formic acid as areducing agent are both large-diameter nano-assemblies assembled from nanowires with a length of 1-5 nm,And the concentration of formic acid and bimetallic feed ratio will have a greater impact on product morphology and performance.When the formic acid concentration is 3 M and the PdCu bimetallic feed ratio is 3:1,the prepared PdCu-3-1 nano-antibacterial sample has the best morphology.Electrochemical tests indicate that PdCu-3-1 has the highest catalytic activity and catalytic stability for C2H5OH,its highest curent density is 1598 mA/mg,and it can maintain 89%of its highest electro catalytic activity after 200 cycles.When the formic acid con centration of the reducing agent is 2 M and the PdAg feed ratio is 3:1:the prepared PdAg-3-1 has the best morphology and the highest catalytic activity for C2H5OH.The highest current density can reach 2252 mA/mg.The highest current density of various bimetallic nano crystals prepared is higher than that of commercial palladium carbon(Pd\C).At the same time,we also innovatively prepared palladium silver copper trimetallic nano flowers,whose morphology rules are controllable,which provides new ideas for the development of new high-performance bimetallic and trimetallic nanocrystals.Through physical blending,PdAg,PdCu and PdAg NWs nano-antibacterial agents were added to the sodium alginate solution.Using wet spinning technology,a series of nano-antibacterial agent blended sodium alginate fibers were prepared.SEM characterization of the longitudinal direction of the fiber revealed that the addition of PdAg and PdAg NWs nano-antibacterial agents will reduce the number of grooves on the surface of the sodium alginate fiber and reduce the surface roughness of the fiber.The addition of PdCu nano-antibacterial agent will increase the number of grooves on the surface of the sodium alginate fiber and increase the roughness of the fiber surface The mechanical property test shows that the addition of the three nano antibacterial agents will reduce the breaking elongation and breaking strength of the sodium alginate fiber The antibacterial test of and Staphylococcus aureus by blending sodium alginate fibers found that PdAg blended sodium alginate fibers had certain antibacterial properties against both bacteria,but the antibacterial rate against E coli reached 89%.The bacteriostatic rate of Staphylococcus aureus was 49.6.Moreover,the PdAg-1-1 blended sodium alginate fiber has a higher bacteriostatic rate than the PdAg-3-1 blended sodium alginate fiber,the better its antibacterial performance.This provides a new route for the development of new bimetallic nano-antibacterial agents and new blended antibacterial sodium alginate fibers.