ࡱ> .0- )bjbj$$ 4F|F|'2222F 24RRRRR---/111111$UE-----URRWWW-RR/W-/WWWROcuW0WHXHWHW--W-----UU/(-------H--------- : ELEKTROPOLIMERIZACIJA PIROLA NA Mg LEGURI U SVRHU ZA`TITE BIORAZGRADIVIH IMPLANTATA ELECTROPOLYMERIZATION OF PYRROLE ON Mg ALLOY FOR BIODEGRADABLE IMPLANT APPLICATION Ivana `kugor Ron evia, Zoran Gruba a, Mirjana Metikoa-Hukovib aDepartment of General and Inorganic Chemistry, Faculty of Chemistry and Technology, University of Split, N. Tesle 10, 21000 Split, Croatia bDepartment of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, P.O. Box 177, 10000 Zagreb, Croatia Many reasons make magnesium and its alloys the best potential materials for biodegradable implants: (i) magnesium is an essential element to humans and benecial for bone strength; (ii) magnesium degrades in physiological solutions; and (iii) the mechanical properties of magnesium are similar to those of natural bone. Unfortunately, magnesium is very susceptible to corrosion in physiological solutions and its mechanical properties decrease before the new tissue has healed. Various surface treatments have been applied to magnesium and its alloys to improve their corrosion resistance and the lifetime of implants. It has been also found that pre-treatment methods are very important for the protection of magnesium against corrosion. Pre-treatment methods remove the passive oxide layer that forms easily due to the high reactivity of Mg and has a detrimental effect on coating adhesion and uniformity. Because of its relatively easy preparation from aqueous solution and stability at oxidized state, polypyrrole and its derivatives are reported to be one of the most important candidates for corrosion protection. In this study, the polymeric coating (polypyrrole) was formed on the magnesium alloy by electrochemical polymerization from aqueous solution of sodium salicydrL N P z | t u XYȻȻȻȫshsh\QIQhE,mH sH hE,hE,mH sH h`}hIZ5mH sH h`~h`~mH sH h`~h`~H*mH sH h`~h`~CJH*aJmH sH h`~h`~CJaJmH sH h`~5CJaJmH sH h`~h`~5CJaJmH sH h`~5CJaJmH sH h`~h`~5CJaJmH sH hnQ5CJaJmHsHhG5CJaJmHsHh`~5CJaJmHsHP ) d]gd`e&4d]4^gdht$a$gd`~$a$gdhtjkKp=()ʿտստʱh`e&hIZ\mHsHUh`e&h3mH sH h`e&h`e&mH sH h3mH sH hz,mH sH hE,hE,mH sH h+mH sH hE,mH sH late. The protection efficiency of the polymeric coatings was investigated in a simulated physiological solution (Hanks solution) using voltammetry and electrochemical impedance spectroscopy methods. The structural characteristics of the surface coatings were investigated by the FTIR technique. 21h:p4&J. A!"#/ $/ % b 666666666vvvvvvvvv666666>6666666666666666666666666666666666666666666666666hH6666666666666666666666666666666666666666666666666666666666666666662 0@P`p2( 0@P`p 0@P`p 0@P`p 0@P`p 0@P`p 0@P`p8XV~PJ_HmH nH sH tH L`L IZNormal$da$KHPJ_HmHsHtH F@F IZ Heading 1$dx@&5CJB@B IZ Heading 2 @& CJmH sH DA D Default Paragraph FontRiR  Table Normal4 l4a (k (No List @>@@ IZTitle$x@&a$5CJ44 IZHeader  %6U`6 IZ Hyperlink >*B*phPK![Content_Types].xmlN0EH-J@%ǎǢ|ș$زULTB l,3;rØJB+$G]7O٭V$ !)O^rC$y@/yH*񄴽)޵߻UDb`}"qۋJחX^)I`nEp)liV[]1M<OP6r=zgbIguSebORD۫qu gZo~ٺlAplxpT0+[}`jzAV2Fi@qv֬5\|ʜ̭NleXdsjcs7f W+Ն7`g ȘJj|h(KD- dXiJ؇(x$( :;˹! I_TS 1?E??ZBΪmU/?~xY'y5g&΋/ɋ>GMGeD3Vq%'#q$8K)fw9:ĵ x}rxwr:\TZaG*y8IjbRc|XŻǿI u3KGnD1NIBs RuK>V.EL+M2#'fi ~V vl{u8zH *:(W☕ ~JTe\O*tHGHY}KNP*ݾ˦TѼ9/#A7qZ$*c?qUnwN%Oi4 =3N)cbJ uV4(Tn 7_?m-ٛ{UBwznʜ"Z xJZp; {/<P;,)''KQk5qpN8KGbe Sd̛\17 pa>SR! 3K4'+rzQ TTIIvt]Kc⫲K#v5+|D~O@%\w_nN[L9KqgVhn R!y+Un;*&/HrT >>\ t=.Tġ S; Z~!P9giCڧ!# B,;X=ۻ,I2UWV9$lk=Aj;{AP79|s*Y;̠[MCۿhf]o{oY=1kyVV5E8Vk+֜\80X4D)!!?*|fv u"xA@T_q64)kڬuV7 t '%;i9s9x,ڎ-45xd8?ǘd/Y|t &LILJ`& -Gt/PK! ѐ'theme/theme/_rels/themeManager.xml.relsM 0wooӺ&݈Э5 6?$Q ,.aic21h:qm@RN;d`o7gK(M&$R(.1r'JЊT8V"AȻHu}|$b{P8g/]QAsم(#L[PK-![Content_Types].xmlPK-!֧6 0_rels/.relsPK-!kytheme/theme/themeManager.xmlPK-!0C)theme/theme/theme1.xmlPK-! ѐ' theme/theme/_rels/themeManager.xml.relsPK] ') ) 8@0(  B S  ?29UZtef)S)ST~8;&)ST&)+*TV9 M`"`e&E,z,'13l7{@(AtB|G1sI4&JHOiQnQUaXIZ]sz`~CGqP)c!\oj+$ht`}[?8J TV')@9999@'@ @0@UnknownG* Times New Roman5Symbol3. * Arial; BatangA$BCambria Math"q!R&G!R&G R&G77#/ r4##3qHX ?TV2!xx  HRVATSKI NASLOV RADA (BOLD 14 ptisoljicIvanaOh+'0 $0 P \ h t$HRVATSKI NASLOV RADA (BOLD 14 ptisoljic Normal.dotmIvana2Microsoft Office Word@@Er@6u@6u7՜.+,0D hp|  # !HRVATSKI NASLOV RADA (BOLD 14 pt!HRVATSKI NASLOV RADA (BOLD 14 pt TitleNaslov  !"#$&'()*+,/Root Entry Flu11TableHWordDocument4SummaryInformation(DocumentSummaryInformation8%CompObjr  F Microsoft Word 97-2003 Document MSWordDocWord.Document.89q