热处理温度对TiO_2纳米管膜层表面特性的影响  

Effect of annealing temperature on the surface properties of TiO_2 nanotube films

作　　者：王珂[1] 朱文军[1] 张辉[1] 张璐[1] 王焱[1] 

机构地区：[1]中山大学光华口腔医学院附属口腔医院.广东省口腔医学重点实验室,广东广州510055

出　　处：《临床口腔医学杂志》2014年第8期465-469,共5页Journal of Clinical Stomatology

基　　金：广东省自然科学基金(S2013010016060);广东省科技计划项目(2011B031300017)

摘　　要：目的:研究热处理温度对TiO2纳米管膜层表面特性的影响。方法:利用阳极氧化法在纯钛表面制备TiO2纳米管膜层。以TiO2纳米管膜层为对照组,通过扫描电镜、能谱分析仪、X射线分析仪,激光共聚焦显微镜及接触角分析仪检测450℃、500℃、550℃及600℃热处理后的TiO2纳米管膜层表征。结果:利用阳极氧化法可获得管径规整均一,高度有序的TiO2纳米管膜层。450℃、500℃及550℃处理后膜层表面形貌及纳米管管径相近;仅550℃组纳米管壁厚度增加;600℃处理后膜层形貌破坏,纳米管结构坍塌。各组均由钛、氧元素组成;仅对照组含有少量氟元素。对照组TiO2纳米管为非晶态结构;450℃处理后,锐钛矿相出现;500℃处理后,锐钛矿衍射峰强度增加;550℃处理后,锐钛矿衍射峰减弱,且金红石相出现;600℃处理后,金红石相衍射峰显著升高。对照组TiO2纳米管膜层及450℃处组膜层具有较高的亲水性及表面能,其余各组的亲水性及表面能随热处理温度的升高呈逐渐下降的趋势。结论:不同温度的热处理可改变TiO2纳米管膜层的表面特性,且晶相结构是引起膜层表面特性改变的主要原因。550℃及以下温度处理不会破坏TiO2纳米管结构,并可获得不同晶相的TiO2纳米管膜层。Objective：To explore the effect of temperatures on the surface properties of TiO2 nanotube annealing at different temperatures by anodization.Method：TiO2 nanotube layers by anodization are randomly divided into 4 groups,and respectively,annealed at 450 ℃,500 ℃,550 and 600 ℃,the unannealed TiO2 nanotube layers as the control group.The surface topography,elemental characteristics,phase composition,roughness and surface wettability were investigated.Resuit：The surface morphology is constant with the control group,when annealed at 450 ℃,500 ℃ and 550 ℃,but collapsed when annealed at 600 ℃.All groups are composed of titanium and oxygen.The only difference is that control group contains a small amount of fluoride ion.The as-formed TiO2 nanotubes are amorphous in nature but can be changed after annealing.At 450 ℃,anatase appears.At 500 ℃,the diffraction peaks of anatase increase.At 550 ℃,anatase diffraction peaks reduced and rutile phase appears and at 600 ℃ futile is enhanced.All groups have the similar surface roughness except a reduction in 600 ℃ group.Control group and 450 ℃ group have high hydrophilic surfaces.With an increasing annealing temperature,hydrophilia declines in other groups.Conclusion：Crystalline phases of TiO2 nanotube layers can be changed by annealing,and it may be main causes of the surface properties changes.Intact TiO2 nanotube layers can be obtained after annealing at 550 ℃ and below temperature.

关 键 词：TIO2纳米管 热处理 表面特性 

分 类 号：R783.1[医药卫生—口腔医学]