硫酸铜掺杂TiO_2涂层对碳纤维抗氧化性能的影响  

Influence of CuSO_4 Doping on the Oxidation Resistance of TiO_2-Coated Carbon Fibers

作　　者：王勇[1,2] 余海鹏[1] 胡永琪[1] 赵瑞红[1] 李飞龙[1] 张文娇[1] 张兆翔[1] 

机构地区：[1]河北科技大学化学与制药工程学院,石家庄050018 [2]Department of Chemical & Biomolecular Engineering,The University of Melbourne

出　　处：《无机化学学报》2013年第12期2549-2554,共6页Chinese Journal of Inorganic Chemistry

基　　金：河北省自然科学基金(B2013208155);国家自然科学基金(No.60578041)资助项目

摘　　要：采用溶胶-浸渍法,以CuSO4为烧结助剂在碳纤维表面制得TiO2涂层。利用XRD、SEM和TEM分析了涂层相组成及形貌,通过静态等温氧化实验考察了涂层碳纤维抗氧化性能。结果表明:掺杂CuSO4制备TiO2涂层均匀完整致密,涂层相组成均为锐钛矿型TiO2,且涂层厚度从45 nm提高至185 nm;与普通TiO2涂层碳纤维相比,完全氧化温度从667℃上升到800℃,氧化活化能从118.390 kJ·mol-1提高到152.562 kJ·mol-1,CuSO4的掺杂大大提高了TiO2涂层碳纤维的抗氧化性能。Carbon fiber （CF） was coated with TiO2 layer by sol-dipping method using CuSO4 as dopant. The prepared samples were characterized by X-ray diffraction （XRD）, scanning electronic microscopy （SEM） and transmission electron microscopy （TEM）. The SEM/TEM results show that the prepared CuSO4-TiO2 layer is uniformly and compactly. The thickness of the coating layer is increased from 45 nm to 185 nm. XRD results show that prepared layer is composited by anatase TiO2. The oxidation resistant properties of the carbon fibers were studied using isothermal oxidation experimental. Compared with TiO2 coated carbon fiber, the complete decomposition temperature of the CuSO4-TiO2 coated carbon fiber is increased from 667 ℃ to 800 ℃. The oxidation activation energy of TiO： coating carbon fiber and CuSO4-TiO2 coating carbon fiber are 118.390 kJ· mol-1, 152.562 kJ·mol-1, respectively. The improvement of oxidation resistant of the CuSO4-TiO2 coated carbon fiber is attributed to the CuSO4 liquid sinter effect on the TiO2 layer.

关 键 词：TIO2 碳纤维 抗氧化性能 液相烧结 

分 类 号：TQ342.74[化学工程—化纤工业]