2004-2005 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Cheng, FT

Geng, F

Shi, P

2004-2005 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe

PolyU Institutional Repository

? 14?? 9 ? 中国有色金属学报 2004? 9?Vol.14 No.9 The Chinese Journal of Nonferrous Metals Sep.2004????:1004 0609(2004)09 1575 05NiTi???????? TiO2????????????①耿　芳1 , 石　萍1 , F.T.Cheng2(1.????? ????????? , ?? 121001;2.Department of Applied Physics , Hong Kong Polytechnic University , Hong Kong , China)?　?:????-???? NiTi??????? TiO2 ?? , ? DSC ????????????????。????:? NiTi???????? TiO2 ??;??? TiO2??? NiTi??? NiTi ??? 316L??? 、 Ti6Al4V ?? , ?????? , ????? , ?? TiO2???? NiTi???????。???:NiTi;??;??;TiO2?????:TG 139;TG 178 ?????:ATiO2 film preparation and hemocompatibility ofNiTi shape memory alloyGENG Fang1 , SHI Ping1 , F.T.Cheng2(1.School of Materials &Chemical Engineering ,Liaoning Institute of Technology , Jinzhou 121001 , China;2.Department of Applied Physics ,Hong Kong Polytechnic University , Hong Kong , China)Abstract:TiO2 film was coated on the surface of NiTi alloys by sol-gel method.The variations of gel on heating were analyzedby DSC.The X-ray diffraction results indicate that TiO2 film formed on NiTi alloy is rutile.Compared with uncoated NiTi , 316Lstainless steel and Ti6Al4V , TiO2-coated NiTi exhibits excellent hemocompatibility , such as lower hemolysis rate and longer clot-ting time.Key words:NiTi;hemolysis;clotting;TiO2　　???????? , NiTi??????????????????????? , ??????????????? , ?? , NiTi ?????????????????????????。??? ,??????????NiTi?????? , ???????????。?????????????????????????????????????????????? 。?????? , TiO2[ 1] ,Al2O3[ 2] , SiC[ 3] ?????????????? ,???????????????????????TiO2 ????[ 4] 。????????????????????[ 5] , ??NiTi??????TiO2 ????????????? , ??????? , ???????? , ????????????????????? , ????????????[ 6] 。TiO2 ??????? , ??-?????TiO2?????? , ????? , ???????? , ?????? , ????????????????。???????-???? NiTi??????????? TiO2?? , ????? 、????① ????:2004 02 01;????:2004 05 22????:?　?(1977 ), ? , ?????.????:?　? , ??;??:13591266349;E-mail:p.shi@163.com????????????? 。1　??1.1　TiO2?????20 mL?????? 88 mL ????? , ??0.5 mL ????????? , ?????????????? 1 h , ??????????(2.6mL ? , 44 mL????)? 0.5 mL ?? , ????50 min , ???? 、????? TiO2 ???????。?NiTi??????????? , 10 s? , ????????? , ?????? 100 ℃?????? 5 min , ???????? 5 min? , ??????? 500 ℃, ?? 1 h???????? , ???????。1.2　TiO2????????SETARAM-Labsys??????????????????????? , ??????? ,????? 10 ℃/min 。? X?????? NiTi???????????? , ????? D/MAX-2500PC 18kW??? , ?? Cu? , ???? 40 kV ,???? 30 mA。1.3　??????? 50.8%Ni(????)? NiTi ?? 、 316L????Ti6Al4V??????? 10 mm×10mm×2 mm ???。???? 20 mL , ???????。1)???????:???????? 0.1mL ???? , ???? 10 、20 、 30 、 40 、50 min? ,??????? 15 mL????????? 5 min ,????????????????? , ????????。??????????????? , ????? 752???????? , ???????545 nm 。2)??????:? 8 mL ???? , ?? 10mL ???? , ????。?????10 mL ????? , 37 ℃????? 30 min ??? 0.2 mL ??? , ???? , ???????? 60 min。???????? 1000 r/min?????? , ??????545 nm????????? , ????? 10 mL???+0.2 mL??? , ????? 10 mL ????+0.2 mL??? 。???? α(%)=(Dt -D nc)/(Dpc -D nc)????? , ?? α???? , Dt ?????? , Dnc???????? , D pc????????[ 7] 。2　?????2.1　TiO2 ??????????????-???????????? 、???????TiO2 ? , ??????????????????-???????? 。??????? ,?????????? , ?????? , ??????? , ???????。????? , ????? , ???? , ?????????? , ????? , ?????? , ?????。?????????? , ???? , ???????? , ????????????? , ????“???” 。?????? , ?????????? , ???? TiO2????????????? , ????????TiO2????????[ 8] 。????????????? 、?????? 、?????? 、???????? 。???????????????? ,?????? 、??????? , ????????????????????????????? 。??????????????? , ?????? , ???????? , ???????。??-??????TiO2???????100 nm 。?????????? , ????? , ??????。????? pH?????? , ??? pH?? 2.56.0 , ?????????????? , pH ?? , ??????? , ?????? , ????????? 。???? , ????????? , ???????? , ???? , ?????? , ?????? ,????? , ???? , ????????? , ?? TiO2??。??????????? 40 ℃, ???????? , ?????????????。????????????????? , ??????????????? , ?????????? , ??????????? 。???? , ???? 48 h?????? TiO2 ?? , ??????????? 224 h。????? , ????????? , ??????;??????(??????), ??????????。2.2　TiO2 ???????? 1??? TiO2 ??? DSC ?? 。?? 1?? , ?80 ℃??????????? , ?????·1576· ????????　　　　　　　　　　　　　　　2004? 9 ???????????????????;??250 ℃????????? , ??? TiO2???????????????[ 9] ;? 280 ℃???????? , ??????????????????????? , ??????????????[ 10] ;?350 ℃??????? , ????????????????;? 500 ℃?????????? ,????????????????。? 2???XRD??????? TiO2 ?????? , ???NiTi???????? , Ms ? As ???????? , ?????500 ℃???1 h , ?????????Ni??? , ????????? , ??????? , ???????? B19′??? 。2.3　TiO2????????? 1　TiO2?? DSC??Fig.1　DSC curve of TiO2 gel? 2　TiO2 ?? XRD?Fig.2　XRD patterns of TiO2 gel(a)—As-received NiTi;(b)—NiTi after sol-gel treatment? 3????????????? , ???? , ??????????? , ???? TiO2 ???NiTi??? NiTi?? 、 316L ??? 、 Ti6Al4V???????? , ??????????????? , ???????????? , ?????????????? , ?????? , ???????????????? , ???????????? , ?? TiO2 ?????????? 。?????????3 ???:?? X(Stuart factor)??????????????;???????????;?????????????。?????????????? 3?? , ????????????? , ???????????? 4????? , ?????????。???????? 、???????(?? 、???), ???????? , ???????????????? , ?????????。??????????????????? , ?? 30 min??????????????? , ??????????????[ 11 , 12] 。?????? 2???????????????Ca2+??? , TiO2?????6.2[ 13] , ??? pH=7.4? , ???? , ??????????????????????。???TiO2???????????????? , ?????TiO2????????? Ca2+??? , ???????? , ???Ca2+????? TiO2???? , ??? Ca2+?? ,?????? , ???????????? , ??? ? ? ? ? ? ? ? ? ? ????????? ,?????????????? 3　???????????????????Fig.3　Absorbance of differentmaterials versus time·1577·? 14 ?? 9 ?　　?　? , ?:NiTi????????TiO2?????????????????? , ????????????????????????????????(FDP), ???????????? 。?4 ???? TiO2 ??? NiTi???????NiTi?? 、316L ??? 、 Ti6Al4V ?????????? 。?? 4?? , ???? TiO2??? , Ni-Ti?????????? , ????? <1%, ???????????????? <5%??? 。????????????????????? ,??????? 。? 4　????????Fig.4　Hemolysis rate of different materials???[ 14]???????????????????????? , ???????????? , ??????????? , ??????????? , ?????。??????? , ????????????????。???????????????????[ 15] , ??????????????????? , ????????????????? , ????? 。?????? N???????????? 、?????????????? , ??????????? 。????????????????? TiO2 ????????0.1 eV[ 16] , ?????????????????? , ???? , ??????????? 。???[ 14]?? , ??????O/Ti???? ,????????? , ???????。??????????????????? , ?????? , ???????????????? , ???? , ?????????????? , ???????????????? 2??? , ????????????。???? , ?????????????????? , ?????? , ?????????? , ???? , ????????????????。?? , ??????????? 。3　??1)???-????NiTi??????? TiO2?????????。2)???? TiO2 ??? NiTi??? NiTi ?? 、316L??? 、Ti6Al4V?? , ?????? , ?????????? , ?? TiO2 ????? NiTi???????? 。REFERENCES[ 1] 　?　? , ?　? , ??? , ?.????? Ti-O?????????????????[ J] .?????????? , 1997 , 16(3):199 205.HUANG Nan , YANG Ping , ZENG Xiao-lan , et al.Surfacemodification of LTI carbon by titanium-oxide coating synthe-sised by ion beam[ J] .Chinese Journal of Biomedical Engi-neering , 1997 , 16(3):199 205.[ 2] 　Yuhia T , Kikuta Y , Mitamura Y , et al.Blood compatibilityof sputter deposited alumina films[ J] .Biomed Mater Res ,1994 , 28(2):217 224.[ 3] 　Amon M , Bolz A , Schaldach M.Improvement of stentingtherapy with a silicon carbide coated tantalum stent [ J] .Mater Sci Mater Med , 1996 , 7(5):273 278.[ 4] 　Shirkhanzaeh M.XRD and XPS characterization of superplas-tic TiO2 coatings prepared on Ti6Al4V surgical alloy by anelectrochemical method[ J] .Mater Sci Mater Med , 1995 , 6(4):206 210.[ 5] 　Thierry B , Tabrizian M , Savadogo O , et al.Effects of steril-ization processes on NiTi alloy:Surface characterization[ J] .JBiomedMater Res , 2000 , 49:88 98.[ 6] 　Cheng F T , Shi P , Man H C.A preliminary study of TiO2deposition on NiTi by a hydrothermal method[ J] .Surface andCoatings Technology , 2004 , 181(1):26 32.[ 7] 　WANG Xiang-hui , FENG Zhang , LI Chang-rong , et al.Im-provement of blood compatibility of artificial heart valves viatitanium oxide film coated on low temperature isotropic carbon[ J] .Surface and Coatings Technology , 2000 , 128 129:3642.[ 8] 　??? , ??? , ???.TiO2 ?????????[ J] .????? , 2001 , 29(1):37 41.YU Xiang-yang , CHENG Ji-jian , DU Yong-juan.Ways offorming TiO2 photocatalytic film[ J] .Glass &Enamel , 2001 ,29(1):37 41.[ 9] 　??? , ??? , ???.??-????? TiO2??·1578· ????????　　　　　　　　　　　　　　　2004? 9 ?????[ J] .????? , 1997 , 3:13 17.YAN Ji-na , YU Gui-yu , YANG Nan-ru.Study on the prepa-ration of TiO2 separation membrane using sol-gel technique[ J] .Bulletin of the Chinese Ceramic Society , 1997 , 3:1317..[ 10] 　??? , ??? , ??? , ?.?? TiO2 ??? , ???????????[ J] .???? , 2001 , 32(1):69 71.WU Feng-qing , RUAN Sheng-ping , LI Xiao-ping , et al.Synthesis , characterization and photocatalytic degradationproperties of TiO2 nanocrystalline[ J] .Functional Materials ,2001 , 32(1):69 71.[ 11] 　??? , ??? , ?　? , ?.???? TiO2 ?????-??????????????[ J] .?????????? , 2002 , 21(5):398 403.LIU Jing-xiao , YANG Da-zhi , SHI Fei , et al.Preparationof TiO2 film on metallic substrates by sol-gel method andstudy on its hemocompatibility [ J] .Chinese Journal ofBiomedical Engineering , 2002 , 21(5):398 403.[ 12] 　Chen J Y , Leng Y X , Tian X B , et al.Antithrombogenicinvestigation of surface energy and optical bandgap andhemocompatibility mechanism of Ti(Ta+5)O2 thin films[ J] .Biomaterials , 2002 , 23:2545 2552.[ 13] 　ShirkhanzadehM.Nanoporous alkoxy-derived titanium oxidecoating:a reactive overlayer for functionalizing titanium sur-face[ J] .Mater Sci Mater Med , 1998 , 9(6):355 362.[ 14] 　?　? , ??? , ???.???????????????[ J] .????????? , 2000 , 17(2):146 150.ZHANG Feng , LI Chang-rong , WANG Xiang-hui , et al.Study on the mechanism of hemocompatibility of titanium ox-ide films[ J] .Journal of Biomedical Engineering , 2000 , 17(2):146 150.[ 15] 　Eley D , Spivey D.The semiconductivity of organic sub-stances , part 6[ J] .Trans Frans Faraday Soc , 1960 , 56:1432 1433.[ 16] 　Attia S M , ??? , ??? , ?.??????-??TiO2 ???????[ J] .?????? , 2001 , 29(11):1327 1330.Attia S M , WU Guang-ming , MA Jian-hua , et al.Effect ofheat treatment on properties of TiO2 films prepared with sol-gel method[ J] .Journal of Tongji University , 2001 , 29(11):1327 1330.(??　???)·1579·? 14 ?? 9 ?　　?　? , ?:NiTi????????TiO2????????????

TiO2 film preparation and hemocompatibility of NiTi shape memory alloy

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