Characteristics and kinetics of the glycerol ester of rosinviaan oxidation process under ultraviolet irradiation

Autor:	Jiahua Wen, Yuanlin Li, Xiongmin Liu, Chang Yu, Xingliang Xu, Hao Bian, Mengmeng Niu, Min Liang, Jing Chen, Fang Lai, Li Ma
Rok vydání:	2020
Předmět:	fungi Kinetics Rosin General Chemistry Activation energy Photochemistry Peroxide Catalysis Chemical kinetics Light intensity chemistry.chemical_compound Glycerol ester of wood rosin chemistry Materials Chemistry medicine Irradiation medicine.drug
Zdroj:	New Journal of Chemistry. 44:3375-3381
ISSN:	1369-9261 1144-0546
Popis:	A self-designed mini gas–solid reaction device was applied as promising equipment to investigate the oxidation characteristics and kinetics of the glycerol ester of rosin (GER) under 254 nm UV irradiation in air. Peroxide formation during the photo-oxidation process was analyzed by iodimetry. The peroxide concentration is related to the light intensity (I) and the temperature (T), and increasing I and T would destabilize the GER by accelerating peroxide generation. The photo-oxidation of GER followed pseudo-first-order reaction kinetics under a given hypothesis. A linear relationship was observed between activation energy and the logarithm of light intensity (ln I), which can be expressed as Ea = −3.575 ln I + 34.943 under the experimental conditions. This research indicated that under 254 nm UV irradiation GER could be easily oxidized even at room temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::370e3b6d2050b435c1b281f74a44f9a3 https://doi.org/10.1039/c9nj04439f Zobrazit plný text záznamu