反气相色谱法对钛白粉表面性质的研究  

Characterization of surface properties of titanium dioxide by inverse gas chromatography

作　　者：王小慧 郭杰 胥金秀 谭玲 解莉花 胡一杰 Wang Xiaohui;Guo Jie;Xu Jinxiu;Tan Ling;Xie Lihua;Hu Yijie(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China;Department of Advanced Functional Materials,Chengdu Advanced Metallic Materials Industry Technology Research Institute Co.,Ltd.,Chengdu 610305,Sichuan,China)

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]成都先进金属材料产业技术研究院股份有限公司先进功能材料研究所,四川成都610305

出　　处：《钢铁钒钛》2024年第5期43-48,共6页Iron Steel Vanadium Titanium

摘　　要：采用反气相色谱法(IGC)测试了3种钛白粉的表面能和酸碱常数,研究有机表面处理对钛白粉表面性质的影响。通过不同温度下不同分子探针试验计算研究了样品的非极性表面能。结果表明:在同一温度下(测试温度范围内),随着包覆有机物的增加,样品的非极性表面能γ_(s)^(d)减小;样品的γ_(s)^(d)随着温度的升高而减小。同时通过以极性分子为探针分子计算研究表面能的酸碱分量,结果表明钛白粉表面呈两性偏酸性,有机处理剂与钛白表面羟基反应使得表面酸位点减少,酸性下降。但是过多地加入有机处理剂时,部分有机处理剂水解生成羟基未与钛白反应,反而增加样品表面酸性。The surface energy and acid/base constants of three kinds of titanium dioxide(TiO_(2))were measured by inverse gas chromatography(IGC)to investigate the effect of organic treatment on the surface properties of TiO_(2).The non-polar surface energy of the samples were calculated by using different molecular probes at different temperatures.The results indicate that non-polar surface energyγ_(s)^(d)of TiO_(2)decreases with the increase of organic cladding amount at the same temperature(within the testing temperature range).As the temperature increases,ofγ_(s)^(d)TiO_(2)decreases.Meanwhile,the acid-base component of surface energy was studied by using polar molecules as probe molecules,revealing that the surface of titanium dioxide is amphoacid.Since the surface of TiO_(2)presents acidic,the reaction between organic agents and the hydroxyl groups on the surface of TiO_(2)leads to the decrease in the surface acid sites and thus the surface acidity of TiO_(2).However,when excessive organic agent is added,some hydroxyl groups generated by organic agents hydrolyzation would not react with TiO_(2),resulting in the increment of TiO_(2)surface acidity.

关 键 词：钛白粉 表面性质 反气相色谱法 有机处理剂 

分 类 号：TF823[冶金工程—有色金属冶金] TQ621.1[化学工程—精细化工]