Gamma-irradiation of cellulose nanocrystals (CNCs): investigation of physicochemical and antioxidant properties
| العنوان: | Gamma-irradiation of cellulose nanocrystals (CNCs): investigation of physicochemical and antioxidant properties |
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| المؤلفون: | Carole Fraschini, Paula Criado, Majid Jamshidian, Agnes Safrany, Stephane Salmieri, Monique Lacroix |
| المساهمون: | Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), FPInnovations, International Atomic Energy Agency [Vienna] (IAEA) |
| المصدر: | Cellulose Cellulose, Springer Verlag, 2017, 24 (5), pp.2111-2124. ⟨10.1007/s10570-017-1241-x⟩ |
| بيانات النشر: | HAL CCSD, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Antioxidant, Materials science, Polymers and Plastics, Conductometry, medicine.medical_treatment, Carboxylic acid, [SDV]Life Sciences [q-bio], 02 engineering and technology, Degree of polymerization, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Aldehyde, 0104 chemical sciences, chemistry.chemical_compound, chemistry, medicine, Organic chemistry, Thermal stability, Cellulose, Fourier transform infrared spectroscopy, 0210 nano-technology, Nuclear chemistry |
| الوصف: | International audience; Gamma irradiation is a common process mostly used for sterilization against bacteria growth. However, when the process is applied to a material, physical and chemical changes may alter its integrity and behaviour. The aim of this study was to observe the effect of γ-irradiation on the surface chemistry of CNCs. The carbonyl content (both carboxylic acid and aldehyde functionalities) was followed to investigate the influence of the irradiation dose. Thermal stability, wettability and antioxidant properties were also measured. Conductometric titration showed that the carboxylic acid groups content (COOH) was increased from 43 mmol COOH kg⁻¹ CNCs for native CNCs to 631 mmol COOH kg⁻¹ CNCs when a dose of 80 kGy was applied. These changes were confirmed by FTIR and fluorescence spectroscopy. At high irradiation doses, a significant decrease of approximately 30% was observed in the cellulose degree of polymerization while the aldehyde groups content was increased to 379 mmol CHO kg⁻¹ CNCs due to the cleavage of glycosidic linkages. These physicochemical changes led to enhanced antioxidant properties of CNCs. |
| اللغة: | English |
| تدمد: | 0969-0239 1572-882X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7aed73a2b557ca1bfd4c7b311e22a4b0 https://hal-riip.archives-ouvertes.fr/pasteur-01535193 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....7aed73a2b557ca1bfd4c7b311e22a4b0 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 09690239 1572882X |
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