Preparation And Antibacterial Properties Of Silver Coating On ABS Surface In Civil Aircraft Cabin

The internal space of civil aircraft cabin is closed,narrow and crowded,and the narrow cabin often leads to the spread of pathogenic bacteria.The main transmission routes of pathogenic bacteria in civil aircraft cabin include:air transmission,direct contact transmission and indirect contact transmission.In order to prevent the indirectly spread of pathogenic bacteriain in passengers,this thesis focuses on the ABS（Acrylonitrile Butadiene Styrene）plastics of aircraft cabin interiors by applying BP-GO-AgNPs（Black phosphorus-Graphene oxide-Silver nanoparticles）composite coating on its surface,which has certain significance for improving civil aviation safety.In this thesis,AgNPs is used as antimicrobial,BP-GO（Black phosphorus-Graphene oxide）composite carrier is constructed,BP-GO-AgNPs composite powder is prepared by redox method,and then the powder is added into epoxy resin to prepare BP-GO-AgNPs composite coating.Compared with GO-AgNPs（Graphene oxide-Silver nanoparticles）composite coating,the antibacterial performance of BP-GO-AgNPs composite coating has been improved,which reaches the initial research effect.The main research contents and results are as follows:（1）Liquid-Phase Exfoliation Method:using BP（Black phosphorus）powder,GO（Graphene oxide）powder and NMP（N-Methyl pyrrolidone）solution as raw materials to make the nano layer solution with good dispersion.By covalent bonding,BP nano sheets and GO nano sheets are connected to obtain BP-GO composite carrier solution.The microscopic morphology of BP-GO composite carrier is characterized by SEM,the elemental composition and chemical bonding of BP-GO composite carrier is characterized by XPS,and the composition and structure of composite carrier is characterized by Raman.The comprehensive characterization analysis shows that BP and GO nano sheet are successfully compounded.In this condition,the optimal preparation parameters of BP-GO composite carrier are 10 ml BP（0.5 mg/ml）and 10ml GO（0.5 mg/ml）,and the corresponding content ratio is 1:1.（2）Redox Method:adding Ag NO₃ solution into BP-GO composite carrier solution to make BP-GO-AgNPs composite powder by in-situ reduction method.The microscopic morphology of the BP-GO composite carrier surface loaded with AgNPs was characterized by SEM,the elemental composition of the BP-GO-AgNPs composite powder was characterized by XRD,and the sub-microstructure of the BP-GO-AgNPs composite powder is characterized by TEM.The comprehensive characterization analysis shows that AgNPs are successfully loaded on the surface of BP-GO composite carrier,and in this condition,the optimal parameter value of adding Ag NO₃ is 3ml Ag NO₃（0.1mol/L）.At the same time,GO-AgNPs composite powder is also prepared.Compared with BP-GO-AgNPs composite powder,the number of AgNPs loaded on the surface of BP-GO is more than that of GO-GO（Graphene oxide-Graphene oxide）,and the particle size of AgNPs is relatively small,and its specific surface area is larger.（3）Surface Coating Method:using BP-GO-AgNPs composite powder,epoxy resin and curing agent as raw materials to make the composite coating to paint the surface of ABS plastic.The results show that the optimal preparation parameters are90mg BP-GO-AgNPs composite powder,3g epoxy resin and 2.4g curing agent.Under the parameters,the adhesion grade of the coating is 0.（4）Film Sticking Method:testing the antibacterial property of the material surface.With the increase of BP-GO-AgNPs composite powder,the antibacterial rate of Escherichia coli and Staphylococcus aureus shows a trend of first increase and then decrease.In such a situation,the preferred addition amount of 3 wt%can be derived.At any dosage,the antibacterial rate of BP-GO-AgNPs composite coating is higher than that of GO-AgNPs composite coating,and the antibacterial effect on Escherichia coli is stronger than that on Staphylococcus aureus.