Solid-State Shear Milling for Recycling Aluminum–Plastic Packaging Waste: A Sustainable Solution for Mixed Plastic Waste

Wei，Baojie1,2; Li，Liang1; Ding，Shiyu1; Chen，Ning1; Bai，Shibing1; Yang，Shuangqiao1

2023-04-01

10.3390/su15076144

Sustainability (Switzerland)   影响因子和分区

2071-1050

The application of paper–aluminum–plastic packaging has been widely adopted in various fields such as the food and medical industries, owing to its exceptional preservation and obstruction properties. Nonetheless, the recycling process for paper and aluminum from this packaging type typically involves water pulping and solvent separation. The resulting residual waste, commonly known as multi-plastic waste (PMW), poses significant challenges in terms of separation and recycling. In this research article, we propose a solution for the recycling of PMW using solid-state shear milling (SM). This process utilizes powerful three-dimensional shear force to achieve pulverization and excellent dispersion of multicomponent polymers, all while maintaining ambient temperature conditions. The thermoplastic processability of milled PMW powder was improved. The results indicate that a significant reduction in the the average particle size of PMW from 700 μm to 226 μm after 10 milling cycles, as evidenced by both a particle size analyzer and SEM. Furthermore, SM processing leads to a good dispersion of PMW domains, as confirmed by the reduction in domain size from 9.64 μm to 2.65 μm. DSC and DMA reveal excellent compatibility between the components of the composite, resulting in improved mechanical properties such as tensile stress (from 14.03 MPa to 22.02 MPa) and unnotched impact strength (from 3.26 KJ/m to 4.82 KJ/m). The findings suggest that SM technology could be an effective and sustainable method for recycling PMW without any separation process, with promising industrial application.

aluminum–plastic packaging waste mixed plastic waste recycling solid-state shear milling

英语

其他

Natural Science Foundation of Sichuan Province[2022NSFSC0387];Natural Science Foundation of Sichuan Province[2022NSFSC1919];National Natural Science Foundation of China[52103123];State Key Laboratory of Polymer Materials Engineering[sklpme2020-3-04];State Key Laboratory of Polymer Materials Engineering[sklpme2022-2-01];

2-s2.0-85152658088

Scopus

1.State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu,610065,China
2.Department of Material Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wei，Baojie,Li，Liang,Ding，Shiyu,等. Solid-State Shear Milling for Recycling Aluminum–Plastic Packaging Waste: A Sustainable Solution for Mixed Plastic Waste[J]. Sustainability (Switzerland),2023,15(7).

Wei，Baojie,Li，Liang,Ding，Shiyu,Chen，Ning,Bai，Shibing,&Yang，Shuangqiao.(2023).Solid-State Shear Milling for Recycling Aluminum–Plastic Packaging Waste: A Sustainable Solution for Mixed Plastic Waste.Sustainability (Switzerland),15(7).

Wei，Baojie,et al."Solid-State Shear Milling for Recycling Aluminum–Plastic Packaging Waste: A Sustainable Solution for Mixed Plastic Waste".Sustainability (Switzerland) 15.7(2023).