Knowledge Agora



Similar Articles

Title Recycling of multilayer packaging waste with switchable anionic surfactants
ID_Doc 10161
Authors Vagnoni, M; Pitacco, W; Arpaia, V; Catelli, E; Gualandi, C; Mastroddi, R; Mezzi, A; Samori, C; Sciutto, G; Tagliavini, E; Galletti, P
Title Recycling of multilayer packaging waste with switchable anionic surfactants
Year 2023
Published
Abstract Switchable Anionic Surfactants (SAS) were used for delaminating flexible packaging waste composed of various plastic layers and aluminium, thereby promoting the recycling of such waste streams from a circular economy perspective. The delamination protocol was optimized on de-pulped food and beverage cartons containing low-density polyethylene (LDPE) and aluminium, varying the carboxylic acid and its counterion constituting the SAS (C8-C18 carboxylic acids as the anionic part; inorganic bases and primary, secondary and tertiary amines as the cationic one) their molar ratio (carboxylic acid: base molar ratio from 1:1 to 1:3), SAS concentration (0.15, 0.3 and 0.5 wt%), time (0.5-3 h) and material weight in input (1-10 wt%). High-quality LDPE and aluminium were separated and recovered by using a diluted solution of a surfactant based on lauric acid and triethanolamine (C12- TEA), with performances not achievable with other anionic or cationic surfactants available on the market. The C12-TEA solution was then applied to a large variety of multilayer waste materials composed of polypropylene and aluminium, polyolefins/polyethylene terephthalate/aluminium, giving a material separation dependant on the structure and composition of the material in input. At the end of the process, lauric acid was recovered from the aqueous solution used for washing the separated materials by tuning its water solubility with CO2.
PDF https://doi.org/10.1016/j.resconrec.2023.107141

Similar Articles

ID Score Article
7003 Mumladze, T; Yousef, S; Tatariants, M; Kriukiene, R; Makarevicius, V; Lukosiute, SI; Bendikiene, R; Denafas, G Sustainable approach to recycling of multilayer flexible packaging using switchable hydrophilicity solvents(2018)Green Chemistry, 20, 15
26224 Li, TM; Theodosopoulos, G; Lovell, C; Loukodimou, A; Maniam, KK; Paul, S Progress in Solvent-Based Recycling of Polymers from Multilayer Packaging(2024)Polymers, 16, 12
13746 Paiva, R; Pereira, ER; Wrona, M; Cruz, SA Optimization of Washing Parameters to Minimize the Degradation of Poly(lactic acid) Using Design of Experiments: A Contribution to the Recycling Chain(2024)Journal Of Polymers And The Environment, 32, 4
Scroll