1. Devulcanization of natural rubber industry waste in supercritical carbon dioxide combined with diphenyl disulfide
- Author
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Nathalie Poirot, Lucía Asaro, Said Seghar, Michel Gratton, Nourredine Aït Hocine, Mécanique des Matériaux et Procédés (MMP), Laboratoire de Mécanique Gabriel Lamé (LaMé), Université d'Orléans (UO)-Université de Tours-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université d'Orléans (UO)-Université de Tours-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)-Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)
- Subjects
Thermogravimetric analysis ,Materials science ,020209 energy ,Industrial Waste ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,[SPI.MAT]Engineering Sciences [physics]/Materials ,chemistry.chemical_compound ,Natural rubber ,[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,Recycling ,Disulfides ,Waste Management and Disposal ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,Diphenyl disulfide ,Universal testing machine ,Supercritical carbon dioxide ,Carbon Dioxide ,Pulp and paper industry ,chemistry ,Reagent ,visual_art ,visual_art.visual_art_medium ,Degradation (geology) ,Rubber ,Swelling ,medicine.symptom - Abstract
The elimination of rubber wastes without affecting the environment is one of the most important challenges of the 21st century waste management. Accordingly, the present work is focused on the recycling of natural rubber (NR) industry waste by means of devulcanization in supercritical carbon dioxide (scCO2) atmosphere. With that aim, a novel device allowing to perform rubber devulcanization was developed. It consists of a triaxial compression reactor integrated into a dynamic hydraulic universal testing machine with a heating chamber. NR industry waste was devulcanized in the mentioned device at different temperatures, in scCO2 by using diphenyl disulfide (DD) as devulcanizing reagent. The devulcanization degree and quality of the treated materials were evaluated by the swelling test combined with the Horikx theory. It was appeared that a successful devulcanization, with almost no degradation, was obtained, and the devulcanization degree reached maximum value of ~90%. Thermogravimetric tests and scanning electron microscopy (SEM) images strengthened these results. Finally, it was concluded that the developed device is appropriate to perform rubber recycling, which contributes to the progress in the environmental protection.
- Published
- 2020
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