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Citation: WANG Tao, ZHOU Jian-Hua, WANG Dao-Jun, SUN Dun, DI Zhi-Yong, HE Jian-Ping. Syntheses and Infrared Emissivities of Ordered Mesoporous C-Al₂O₃ Nanocomposites[J]. Acta Physico-Chimica Sinica, ;2009, 25(10): 2155-2160. doi: 10.3866/PKU.WHXB20091008 shu

Syntheses and Infrared Emissivities of Ordered Mesoporous C-Al₂O₃ Nanocomposites

1.
College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

Received Date: 6 May 2009
Available Online: 20 August 2009

C-Al2O3 nanocomposites were synthesized via the sol-gel tri-constituent co-assembly process using an amphiphilic triblock copolymer F127 (PEO106PPO70PEO106, MW=12600) as a template, aluminum iso-propoxide as an inorganic source, and resol as an organic precursor. X-ray diffraction (XRD), transmission electron microscopy (TEM), and nitrogen adsorption/desorption were used to characterize the structures and properties. The results showed that the nanocomposite MC5A5 has ordered mesoporous structures with a high specific surface area of 175 m2·g-1 and a pore volume of 0.22 cm3·g-1. Low infrared emissivity coatings were obtained using the ethylene-propylene-diene monomer (EPDM) as an adhesive and the ordered mesoporous C-Al2O3 nanocomposites as a filling. As the mass percentage of Al2O3 was increased from 30% to 70%, the infrared emissivity decreased from 0.575 to 0.456. Al2O3 can effectively reduce the infrared emissivities of nanocomposites. Ordered mesoporous C-Al2O3 nanocomposites are thus promising for application in martial equipment.
- Ordered mesoporou structure,
- C-Al2O3 nanocomposite,
- Ethylene-propylene-diene monomer,
- Infrared emissivity
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沈阳化工大学材料科学与工程学院沈阳 110142

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Syntheses and Infrared Emissivities of Ordered Mesoporous C-Al₂O₃ Nanocomposites