کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1197758 | 964662 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The influence of reactive dyes on the pyrolysis of cotton The influence of reactive dyes on the pyrolysis of cotton](/preview/png/1197758.png)
The influence of reactive dye, Procion Red HE 3B, on the pyrolysis of cotton was studied, using TGA, DSC and Py-GC–MS methods. The dye, when applied at a high concentration, lowered the decomposition temperature of cotton from 375 °C to 325 °C, and increased the production of residual solids. This effect was attributed to the covalent bonding of the dye molecules to the hydroxyl groups of cellulose, creating a cellulose copolymer and blocking the path for the formation of levoglucosan and volatile products. The pyrolysates of cotton and dyed cotton were different at lower temperatures (300–500 °C), indicating that different mechanisms of pyrolysis were operative at those temperatures. At higher temperatures (700–900 °C), the pyrolysates of cotton and dyed cotton were similar, indicating that the dye had no influence on the mechanism of pyrolysis at such high temperatures.
Journal: Journal of Analytical and Applied Pyrolysis - Volume 81, Issue 2, March 2008, Pages 162–166