Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (01): 248-254.doi: 10.3866/PKU.WHXB20110131

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

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).

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