Release time:2025-01-24 Hits:
- Indexed by:Journal paper
- First Author:Kemeng Liu
- Correspondence Author:Jiang Gong
- Co-author:Xueying Wen,Huiyue Wang,Huajian Liu,Lijie Liu,Ran Niu,Tao Tang,Nan Yao,Ruikun Pan
- Journal:Polymer Degradation and Stability
- Included Journals:SCI
- Discipline:Science
- First-Level Discipline:Chemistry
- Document Type:J
- Volume:232
- Page Number:111117
- Key Words:Silicone rubber; Catalytic degradation; AlCl3; Chemical upcycling; SiO2
- DOI number:10.1016/j.polymdegradstab.2024.111
- Date of Publication:2024-11-30
- Impact Factor:6.3
- Abstract:Chemical recycling of silicone rubber (SR) waste into valuable products has aroused ever-increasing attention; however, the development of a green, efficient degradation strategy for silicone rubber remains challenging. In this work, we report the catalytic upcycling of silicone rubber by AlCl3 to produce SiO2 under atmospheric environment. The optimized AlCl3/SR mass ratio, reaction temperature and time are 0.75, 280 ℃ and 120 min, respectively. The maximum yield of SiO2 is 96 %. The as-prepared SiO2 displays irregular spherical agglomerates with a particle size of 20–30 nm and bears rich micropores/mesopores/macropores. The result of variable-temperature Fourier-transform infrared spectroscopy proves that AlCl3 promotes the fracture of Si-O in SR during heating. According to density functional theory, the addition of AlCl3 leads to a decrease in the bond dissociation energy of Si-O and Si-C. The strategy achieves the green, efficient catalytic degradation of silicone rubber waste.
- Links to published journals:https://doi.org/10.1016/j.polymdegradstab.2024.111117
