Synthesis and Effect of DCCA on the Ambient Pressure Dried, TEOS-Based Silica Aerogel

2014 ◽  
Vol 1044-1045 ◽  
pp. 119-123 ◽  
Author(s):  
Song He ◽  
Xu Dong Cheng ◽  
Hai Jiang Bi ◽  
Hui Yang
Keyword(s):  
Ambient Pressure ◽  
Mesoporous Structure ◽  
High Specific Surface Area ◽  
Low Density ◽  
Chemical Additive ◽  
Control Chemical ◽  
Microstructure Morphology ◽  
Ft Ir ◽  
Drying Control Chemical Additive ◽  
Hydrophilic Gel

In this paper, we report the experimental results on the synthesis of low-density tetraethoxysilane (TEOS)-based silica aerogels prepared under ambient pressure. The drying control chemical additive N, N-Dimethylformamide (DMF) was introduced to the experiments. Before dring, the water within alcogel was exchanged with ethanol and n-hexane. Trimethylchlorosilane (TMCS) was used to modify the hydrophilic gel surface to make sure the final aerogel is hydrophobic. The effects of solvent EtOH and DMF on the properties of the resulting aerogels were investigated. The microstructure, morphology and other properties of the aerogels were studied by FT-IR, TEM and BET measurement. The resulting aerogels have a well-developed mesoporous structure (mean pore size of ~15 nm) with low density (0.08g/cm3), a high specific surface area (1267m2/g) super hydrophobicity (Ө=165o) and high transmissivity (~90%).

Drying Control Chemical Additive (DCCA)

2016 ◽  
Author(s):  
J. Alemán ◽  
A. V. Chadwick ◽  
J. He ◽  
M. Hess ◽  
K. Horie ◽  
...  
Keyword(s):  
Chemical Additive ◽  
Control Chemical ◽  
Drying Control Chemical Additive

Effect of Boric Acid Flux and Drying Control Chemical Additive on the Characteristics of Y2O3:Eu Phosphor Particles Prepared by Spray Pyrolysis

2006 ◽  
Vol 45 (12) ◽  
pp. 9083-9087 ◽  
Author(s):  
Hye Young Koo ◽  
Seo Hee Ju ◽  
Seung Kwon Hong ◽  
Dae Soo Jung ◽  
Yun Chan Kang ◽  
...  
Keyword(s):  
Boric Acid ◽  
Spray Pyrolysis ◽  
Chemical Additive ◽  
Control Chemical ◽  
Drying Control Chemical Additive
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