物理化学学报 >> 2011, Vol. 27 >> Issue (01): 248-254.doi: 10.3866/PKU.WHXB20110131

材料物理化学 上一篇    下一篇

具有双孔径分布的介孔C-Al2O3-TiO2纳米复合材料的合成及其红外发射率

李国显, 王涛, 何建平, 周建华, 薛海荣, 马一鸥, 胡园园   

  1. 南京航空航天大学材料科学与技术学院, 南京 210016
  • 收稿日期:2010-07-13 修回日期:2010-10-09 发布日期:2010-12-31
  • 通讯作者: 何建平 E-mail:jianph@nuaa.edu.cn
  • 基金资助:

    航空科学基金(2007ZF52061)和国家自然科学基金(50871053)资助项目

Synthesis and Infrared Emissivity of Ordered Mesoporous C-Al2O3-TiO2 Nanocomposites with a Dual Pore System

LI Guo-Xian, WANG Tao, HE Jian-Ping, ZHOU Jian-Hua, XUE Hai-Rong, MAYi-Ou, HU Yuan-Yuan   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
  • Received:2010-07-13 Revised:2010-10-09 Published:2010-12-31
  • Contact: HE Jian-Ping E-mail:jianph@nuaa.edu.cn
  • Supported by:

    The project was supported by the Aeronautical Science Foundation of China (2007ZF52061) and National Natural Science Foundation of China (50871053).

摘要:

以嵌段共聚物F127 (PEO106PPO70PEO106, MW=12600)为模板剂, 异丙醇铝和钛酸四丁酯为金属源, 低分子量的酚醛树脂为碳源, 通过溶胶-凝胶三元共组装法合成了具有双孔径分布的C-Al2O3-TiO2纳米复合材料.用X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)及N2吸附-脱附对该复合材料进行结构表征. 结果显示, 当铝钛原子的摩尔比为1:10 时, 对应的纳米复合材料具有较好的有序介孔结构, 其双孔径分别为3.9和6.5 nm, 比表面积可达259 m2·g-1, 孔容0.37 cm3·g-1. 以三元乙丙橡胶(EPDM)为粘结剂, 与介孔纳米复合材料混合制备涂层. 通过调节复合材料中铝钛摩尔比和涂层厚度, 红外发射率在0.450-0.617之间可调.

关键词: 介孔, 有序, C-Al2O3-TiO2纳米复合材料, 双孔径, 红外发射率

Abstract:

C-Al2O3-TiO2 nanocomposites with a dual pore system were synthesized via the sol-gel tri-constituent co-assembly process using an amphiphilic triblock copolymer F127 (PEO106PPO70PEO106, MW=12600) as a template, aluminum isopropoxide and tetrabutyl titanate as metallic sources and resol as an organic precursor. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and nitrogen adsorption/desorption were used to characterize the structures of these nanocomposites. The results show that the nanocomposite with a Al/Ti molar ratio of 1:10 has ordered mesoporous structures with a dual system of 3.9 and 6.5 nm, a high specific surface area of 259 m2·g-1 and a pore volume of 0.37 cm3·g-1. Low infrared emissivity coatings were obtained using the ethylenepropylene- diene monomer (EPDM) as an adhesive and the ordered mesoporous C-Al2O3-TiO2 nanocomposites as a filling. As the Al/Ti molar ratio and coat thickness changed the infrared emissivities changed from 0.450 to 0.617.

Key words: Mesoporous, Ordered, C-Al2O3-TiO2 nanocomposites, Dual-porosity, Infrared emissivity

MSC2000: 

  • O648