Al2O3/SnO2 Co-Nanoparticle Modified Grafted Collagen for Improving Thermal Stability and Infrared Emissivity

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2007,（12）
• 页码范围: 1849-1853
• 页数: 5页
• 语种: 英文

摘要

Al2O3/SnO2 co-nanoparticles were prepared with a modified sol-gel technique followed by a thermal treatment process.With these co-nanoparticles the grafted collagen-Al2O3/SnO2 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 Al203/SnO2 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 Al2O3/SnO2 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 Al2O3/SnO2 co-nanoparticles to 0.424,which provided a potential application of the nanocomposites to areas such as photoelectronics.