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Exceptionally tough nanocomposites from recycled polypropylene and graphene nanoplatelets
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DOI：10.1016/j.compositesb.2026.114071.png)
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Abstract
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As plastic production continues to grow to meet increasing demand, so does plastic waste and the need for economically sustainable recycling to produce a product that has value in its second life. Recycling often negatively impacts the mechanical properties of plastics, but the reduction in properties can be mitigated by blending recycled plastics with other materials. Here, waste impact-modified polypropylene was blended with graphene nanoplatelets that were produced from spent battery anode graphite to create nanocomposites featuring a recycled matrix and filler. The recycled nanocomposites had up to 32% increase in tensile modulus, 111% increase in elongation at break, and 109% increase in Izod notched impact strength. Despite impact properties continuing to improve with higher recycled graphene nanoplatelet concentration, additions of recycled graphene nanoplatelets at 0.1 wt% showed substantial deterioration of tensile properties. These results demonstrate the enormous potential of nanocomposites as an effective and low-cost method for the adoption of recycled plastics for a broad range of applications.
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