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Al 2 O 3 /SnO 2 Co‐Nanoparticle Modified Grafted Collagen for Improving Thermal Stability and Infrared Emissivity
Author(s) -
CAO Yong,
ZHOU YuMing,
SHAN Yun,
JU HuangXian,
XUE XueJia
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790341
Subject(s) - nanocomposite , nanoparticle , emissivity , thermal stability , chemistry , infrared , transmission electron microscopy , chemical engineering , infrared spectroscopy , dispersion (optics) , scanning electron microscope , nanotechnology , composite material , materials science , organic chemistry , optics , physics , engineering
Al 2 O 3 /SnO 2 co‐nanoparticles were prepared with a modified sol‐gel technique followed by a thermal treatment process. With these co‐nanoparticles the grafted collagen‐Al 2 O 3 /SnO 2 nanocomposites were obtained using a supersonic dispersion method. X‐ray diffraction, FT‐IR analysis, transmission electron microscopy, TGA/DTA and infrared emissivity test were performed to characterize the resulting nanoparticles and nanocomposites, respectively. The Al 2 O 3 /SnO 2 co‐nanoparticles showed a narrow distribution of size between 20–40 nm and could be uniformly absorbed on the tri‐helix scaffolds of the grafted collagen without any aggregation. The nanocomposites possessed better thermal stability and substantially lower infrared emissivity than the grafted collagen and Al 2 O 3 /SnO 2 co‐nanoparticles with an increase of degradation temperature from 39 to 210 °C and a decrease of infrared emissivity from 0.850 of the grafted collagen and 0.708 of the Al 2 O 3 /SnO 2 co‐nanoparticles to 0.424, which provided a potential application of the nanocomposites to areas such as photoelectronics.