| 调节pH控制载银纳米TiO2表面包覆的PMMA |
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| 引用本文： | 罗美芳,王焕冰,李春忠.调节pH控制载银纳米TiO2表面包覆的PMMA[J].功能高分子学报,2008,21(4):397-400,442. |
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| 作者姓名： | 罗美芳 王焕冰 李春忠 |
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| 作者单位： | 华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海,200237 |
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| 摘 要： | 测定了十二烷基磺酸钠(SDS)在载银离子纳米TiO2颗粒表面的等温吸附曲线,在SDS达到临界胶束浓度(CMC)时,研究了pH=2.0(等电点以下)和pH=7.0(等电点以上)时甲基丙烯酸甲酯(MMA)在TiO2粒子表面的乳液聚合.采用改性前后TiO2的Zeta 电位的变化、红外光谱(FT-IR)及差热分析(DTA)等表征方法评价了改性效果.结果表明:PMMA成功包覆到TiO2表面,包覆率达17.8%,载银TiO2的表面由亲水变为亲油;在pH=2.0,cSDS=5.0 mmol/L时,Ag+的脱附量只有8%.
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| 关 键 词： | 二氧化钛 表面改性 甲基丙烯酸甲酯 乳液聚合 |
Surface Modification of TiO_2 Containing Ag~+ with Poly (Methyl Methacrylate) Encapsulation by Controlling pH |
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| LUO Mei-fang,WANG Huan-bing,LI Chun-zhong.Surface Modification of TiO_2 Containing Ag~+ with Poly (Methyl Methacrylate) Encapsulation by Controlling pH[J].Journal of Functional Polymers,2008,21(4):397-400,442. |
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| Authors: | LUO Mei-fang WANG Huan-bing LI Chun-zhong |
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| Institution: | LUO Mei-fang,WANG Huan-bing,LI Chun-zhong(Key Laboratory for Ultrafine Materials of Ministry of Education,School of Materials Science , Engineering,East China University of Science , Technology,Shanghai 200237,China) |
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| Abstract: | Absorption isotherms of anionic surfactant sodium dodecylsulfate(SDS) on surface of titanium dioxide nanoparticles were measured.The investigation about the emulsion polymerization of methyl methacrylate(MMA) on the surface of TiO_2 was carried out at pH values of 2.0 and 7.0,respectively,at the critical micelle concentration(CMC) of SDS.The surface properties of the modified TiO_2 were studied by Zeta-potential,FT-IR and DTA,respectively.Experimental results show the TiO_2 particles are encapsulated by PMM... |
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| Keywords: | TiO_2 surface modification methyl methacrylate emulsion polymerization |
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