Recycling of automotive shredder residue by solid state shear milling technology

Yang, Shuangqiao; Zhong, Fei; Wang, Meng; Bai, Shibing; Wang, Qi

doi:10.1016/j.jiec.2017.08.016

Cited by 39 publications

(33 citation statements)

References 37 publications

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“…From the fracture surface the reduction of dispersed phase diameter can be clearly seen in PP/ASR‐10 composite. Recently, block or graft copolymer formation has been achieved and compatibilization effect has been confirmed between different kinds of polymers in ASR via the SSSM process . Here, FTIR analysis of ASR was carried out after Soxhlet extraction with boiling xylene to verify the formation of block copolymer via SSSM pulverization.…”

Section: Resultsmentioning

confidence: 99%

“…We have previously shown that the SSSM process can result in ultrafine polymer powder production, carbon nanotube nanoscale dispersion and immiscible polymer blend compatibilization. In particular, for recycling ASR we reported that excellent dispersion and in situ compatibilization is achieved in such heterogeneous composites via the SSSM process . From the viewpoint of engineering applications, the compatibilization of immiscible polymers through in situ block copolymer formation may show promise for recycling ordinarily immiscible waste plastics into value‐added products without sorting by type or color.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of composites based on recycled polypropylene and automotive shredder residue

Yang

Bai

Duan

et al. 2018

Polymer International

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In past research, mechanical recycling of automotive shredder residue (ASR) has led to serious deterioration of material performance, and real-scale application in this way still remains a challenge. Here, we report a sustainable approach called solid-state shear milling (SSSM) for the production of high-performance polypropylene (PP)/ASR composites with robust mechanical performance on a commercial scale. After the SSSM process, the obtained 50/50 wt% PP/ASR composite exhibited a 41.3% increase in tensile strength, 32.9% increase in flexural strength and 55.0% increase in impact toughness when compared with corresponding composites made by traditional direct melt blending. In particular, the toughness of the material can be improved by further addition of PP grafted with maleic anhydride with toughness comparable to that of recycled PP, and a 325% increase in toughness can be obtained with addition of styrene-butadiene-styrene block copolymer grafted with maleic anhydride. This PP/ASR composite shows good processability and high thermal stability, and meets the requirements of many applications for nonstructural products. The approach presented in this paper highlights a novel technique for ASR recycling.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of composites based on recycled polypropylene and automotive shredder residue

Yang

Bai

Duan

et al. 2018

Polymer International

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“…After milling treatment, they increased to 10.85 MPa and 10.99% due to excellent dispersion and small phase size (Figure 2I). 34,35 The interfacial contact area between the particles increased due to the particle…”

Section: Electrical Insulation Of Appw/eg 3d Printed Partsmentioning

confidence: 99%

Green recycling of aluminum plastic packaging waste by solid‐state shear milling and 3D printing for thermal conductive composites

Wei

Yang

Wang

2021

Polymers for Advanced Techs

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Aluminum-plastic packaging is a multilayer material composed of polymer and aluminum, which has been applied in food, medical, and other fields, due to the excellent fresh-keeping and barrier performance. However, it is difficult to recycle aluminumplastic packaging waste (APPW) due to the complicated components and the low value of reclaim products. This paper reports a green way to recycle the APPW by solid-state shear milling (S 3 M) technology and then fabricate APPW/expandable graphite (EG) composite parts with high thermal conductivity by fused deposition modeling (FDM) process. After the S 3 M treatment, the ultrafine APPW powder with the size of 7 $ 8 um was obtained, and it showed excellent processibility and the APPW/EG composite parts were successfully processed by FDM technology. The APPW/EG three-dimensional (3D) printed parts showed excellent mechanical and heat transfer performance along the stretch direction (0 ), where the tensile strength and thermal conductivity reached 13.58 MPa and 2.71 W/mK for APPW/EG (80/20) composites, respectively, much higher than those of pure APPW composite (7.71 MPa and 0.62 W/mK). Theoretical calculations showed that the interfacial thermal resistances of APPW/EG 3D printed parts with aligned fillers were lower than other samples. Furthermore, the APPW/EG composites with 20 wt.% EG loading showed a low electrical conductivity of 10 −10 S/cm because the oxidation layer was formed on the surface of Al flakes during the S 3 M process, which can be used in the thermally conductive insulating field. The new strategy presented in this work provides a new sight to recycle APPW for value-add material.

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“…ASRs are extremely heterogeneous, as they are a mixture of ferrous and nonferrous metals, plastics, rubbers, fibers, woody materials, etc. [8,9]. Thus, ASRs are often disposed of in landfills or are used for energy recovery, which involves a high risk of contamination.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, ASRs are often disposed of in landfills or are used for energy recovery, which involves a high risk of contamination. Hence, ASRs are classified as hazardous materials and they can cause serious environmental pollution [7,9,10]. ASRs contain approximately 40% of the polymers included in vehicles [11,12].…”

Section: Introductionmentioning

confidence: 99%

Visual-Acoustic Sensor-Aided Sorting Efficiency Optimization of Automotive Shredder Polymer Residues Using Circularity Determination

Huang

Zhu

et al. 2019

Sensors

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To reduce the emissions and weight of vehicles, manufacturers are incorporating polymer materials into vehicles, and this has increased the difficulty in recycling End-of-Life vehicles (ELVs). About 25–30% (mass) of an ELV crushed mixture is the unrecyclable material known as automotive shredder residues (ASRs), and most of the vehicle polymers are concentrated in this fraction. Thus, these vehicle polymers are conventionally disposed of in landfills at a high risk to the environment. The only way to solve this problem is through the development of a novel separation and recycling mechanism for ASRs. Our previous research reported a novel sensor-aided single-scrap-oriented sorting method that uses laser-triangulation imaging combined with impact acoustic frequency recognition for sorting crushed ASR plastics, and we proved its feasibility. However, the sorting efficiencies were still limited, since, in previous studies, the method used for scrap size determination was mechanical sieving, resulting in many deviations. In this paper, a new method based on three-dimensional (3D) imaging and circularity analysis is proposed to determine the equivalent particle size with much greater accuracy by avoiding the issues that are presented by the irregularity of crushed scraps. In this research, two kinds of commonly used vehicle plastics, acrylonitrile-butadiene-styrene (ABS) and polypropylene (PP), and their corresponding composite materials, acrylonitrile-butadiene-styrene/polycarbonate (ABS/PC) and polypropylene/ethylene-propylene-diene-monomer (PP/EPDM), were studied. When compared with our previous study, with this new method, the sorting efficiency increased, with PP and PP/EPDM and ABS and ABS/PC achieving about 15% and 20% and 70% and 90%, respectively. The sorting efficiency of ASR polymer scraps can be optimized significantly by using sensor-aided 3D image measurement and circularity analysis.

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Recycling of automotive shredder residue by solid state shear milling technology

Cited by 39 publications

References 37 publications

Preparation of composites based on recycled polypropylene and automotive shredder residue

Preparation of composites based on recycled polypropylene and automotive shredder residue

Green recycling of aluminum plastic packaging waste by solid‐state shear milling and 3D printing for thermal conductive composites

Visual-Acoustic Sensor-Aided Sorting Efficiency Optimization of Automotive Shredder Polymer Residues Using Circularity Determination

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