پديد آورنده :
شريف احمديان، اميد
عنوان :
ساخت و مشخصه يابي پوشش هاي فلزي پاششي نانو ساختار آنتي باكتريال براي كاربردهاي پزشكي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب و روش ساخت مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
چهارده، 106ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
محمد حسين فتحي، حميدرضا سليمي جزي
استاد مشاور :
جواد مستقيمي، لاري پرشين
توصيفگر ها :
مس , ضد باكتري , پاشش حرارتي قوس الكتريكي , فوق ريزدانه
تاريخ نمايه سازي :
3/1/91
استاد داور :
حسين ادريس، فخرالدين اشرفي زاده
تاريخ ورود اطلاعات :
1396/09/11
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Preparation and Characterization of Wire Arc Sprayed Nanostructure Metallic Antibacterial Coatings For Medical Application O SharifAhmadian Email address o sharifahmadian@ma iut ac ir Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisors name Mohammad Hossein Fathi Professor fathi@cc iut ac irHamid Reza Salimi Jazi Assistant Professor hrjazi@cc iut ac irAbstractThere is an increasing interest in reducing bacterial harmfulness in recent years Infection of medical devicesand treatment rooms can cause significant morbidity and mortality Having antibacterial surfaces such assilver and copper coated areas reduce the risk of bacteria growth considerably In the current study wire arcspraying technique has been utilized to produce an ultra fine microstructure antibacterial copper coating onmetal substrate stainless steel 316L and none metal substrate MDF for antibacterial applications Thechemical composition microstructure and surface morphology of copper coatings were characterized by X ray diffraction XRD and scanning electron microscope equipped for energy dispersive spectroscopy Determination of the thickness and adhesion of the coatings were investigated experimentally The roughnessand wettability of surfaces were characterized using Surface Roughness Inception and dynamic contact anglemeter The surface free energy was calculated by Chibowsky model In order to evaluate and compare thebehavior of the wettability all samples were characterized by Will Helmi model Copper coatings showedlower contact angle and higher surface free energy in comparison to stainless steel 316L and a micro grainstructure of the commercially available copper The influence of microstructure and grainsize surface properties such as contact angle wettability and surface free energy as well as surfaceroughness on the antibacterial behavior were investigated In addition crystallographic defects such asporosity and oxide content of copper coatings on non metallic substrates MDF and metalsubstrates stainless steel 316 L were investigated by Image tool 3 00 software The antibacterial propertiesof copper coatings was analyzed by both gram negative Escherichia coli and gram positive Staphylococcusaureus The antibacterial performance of coatings was compared to stainless steel 316L and a micro grainstructure of the commercially available copper Results indicated that as sprayed copper coatings have anexcellent antibacterial behavior compared to stainless steel and micro grain copper sample which can becontributed to a fine grain size and existance of defects and micro pores in the microstructure Reduction inbacterial numbers of E coli and Staphylococcus aureus after contact with the three different surfacesindicated that E coli was more sensitive to the inhibitory action of the copper coating 97 after 6 h whereas S aureus needes longer time to reach a similar percentage of the reduction The killing rate forstainless steel is in the range of 8 24 h The surface of the copper coating has high hydrophilic among othersurfaces such as stainless steel 316L and a micro grain structure of the copper Statistical analysis showedthat the antibacterial properties of copper coatings were significantly much higher than other samples Thematerial surface characteristics including the high surface roughness the high surface free energy the lowcontact angle and the chemical composition play a key role in increasing the antibacterial behavior of thesurfaces Keywords Copper Antibacterial As sprayed coating Wire arc spray Ultrafine grain Wettability
استاد راهنما :
محمد حسين فتحي، حميدرضا سليمي جزي
استاد مشاور :
جواد مستقيمي، لاري پرشين
استاد داور :
حسين ادريس، فخرالدين اشرفي زاده
