Determination of sublimation rate of 2,4,6-trinitrotoluene (TNT) nano thin films using UV-absorbance spectroscopy

被引：0
作者：
Walid M. Hikal
Brandon L. Weeks
机构：
[1] Texas Tech University,Department of Chemical Engineering
来源：
Journal of Thermal Analysis and Calorimetry | 2012年 / 110卷
关键词：
2,4,6-trinitrotoluene; Sublimation rates; Activation energy; UV spectroscopy; Spin coating; Explosives detection;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We report the in situ measurements of the sublimation rate and activation energy of continuous nanofilms of 2,4,6-trinitrotoluene (TNT) in air using UV absorbance spectroscopy. The films were prepared using acetone-dissolved TNT by simple spin coating deposition technique. Unlike traditional mass loss techniques, this new method is independent of the surface area of the sample which contributes to errors in determining physical parameters accurately in both bulk and thin films of materials. The calculated activation energy and temperature-dependent sublimation rates agree well with the reported values for TNT thin films. The results suggest that UV absorbance spectroscopy is an efficient tool in measuring thermodynamic properties in the nanometer scale for materials with absorbance in the UV region of the electromagnetic spectrum.
引用
收藏
页码：955 / 960
页数：5
相关论文
共 44 条
[1]  
Czarnecki J(2000)Practical thermogravimetry J Therm Anal Calorim 60 759-778
[2]  
Sestak J(2009)Non-isothermal kinetic study of the thermal decomposition of J Therm Anal Calorim 98 463-468
[3]  
Hajimirsadeghis SS(2011)-{bis[benzyl(methyl)amino]phosphoryl}-2,2-dichloroacetamide and J Therm Anal Calorim 103 543-553
[4]  
Teimouri MR(2010)-{bis[dibenzylamino]phosphoryl}-2,2-dichloroacetamide J Phys Chem A 114 12403-12410
[5]  
Rahimi-Nasrabadi M(2003)Response of a glass/phenolic composite to high temperatures Surf Sci 530 L293-L296
[6]  
Dehghanpour S(2007)Sublimation rate of TNT microcrystals in air J Phys Chem B 11 9182-9185
[7]  
Hobbs ML(2009)Effects of interfacial interaction potential on the sublimation rates of TNT films on a silica surface examined by QCM and AFM techniques J Appl Phys 105 104312-831
[8]  
Nakos JT(2008)Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope J Hazard Mater 154 826-129
[9]  
Brady PD(2006)Comparison of kinetic parameters of single crystal pentaerythritol tetranitrate using atomic force microscopy and thermogravimetric analysis: implications on coarsening mechanisms Appl Phys Lett 88 231903-305
[10]  
Gershanik AP(1999)Early events in 2,4,6-trinitrotoluene (TNT) degradation by porphyrins: binding of TNT to porphyrin by hydrophobic and hydrogen bonds Thermochim Acta 333 121-90
12345