Study on the Release Characteristics of Thermal Pyrolysis Products of Carboxymethyl Cellulose at Different Heating Temperatures
In depth exploration of the release characteristics of thermal decomposition products of carboxymethyl cellulose(CMC)under different heating temperature conditions,in order to provide theoretical support for optimizing its application in the heating cigarette process,de-tailed research and analysis of CMC thermal decomposition products at different temperatures were carried out using pyrolysis gas chromatogra-phy-mass spectrometry(Py GC/MS)technology.The results indicated that:CMC begins to pyrolyze at 275℃,with the pyrolysis reaction being more active between 300～350℃.The main pyrolysis products of CMC are oxygen-containing heterocyclic compounds,ketones,and acids,accounting for more than three-quarters of the total pyrolysis products.At 275℃and 300℃,acids occupy a relatively high proportion,which gradually decreas-es thereafter,while the proportion of ketones increases from 275℃to 400℃.The total amount of oxygen-containing heterocyclic compounds first increases and then decreases as the temperature rises.Among the pyrolysis products,the amounts of hydroxyacetone and acetic acid are relatively high,followed by acetaldehyde,acetone,2,3-butanedione,(S)-5-hydroxymethyldihydrofuran-2-one,and furfural.This study not only reveals the ther-mal pyrolysis characteristics of carboxymethyl cellulose at different heating temperatures,but also provides an important reference for a deeper un-derstanding of the thermal behavior of CMC,contributing to the enhancement of the aroma and flavor quality of heated tobacco products.
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