Researchers have grafted amine groups onto common plastics, turning items like Styrofoam cups, food packaging, a fork, a CD case and a Lego base plate into active carbon capture sorbents. The modified polystyrene retained porosity and seized CO₂ both at high‑concentration smokestack streams and at ambient air levels, without altering visual appearance or texture. Performance held across the test set.

The team showed they can dial amine loading up or down and shift the balance between free‑standing NH₂ groups and linking units that create internal pores. When they derived amines from waste urethane foam and decorative trim, the resulting sorbent captured less CO₂ and failed to work in ambient air, highlighting the importance of amine structure and reduces material brittleness.

These results give a flexible blueprint: with a suitable amine source, landfill plastics could be upcycled into functional carbon capture media, even if only partially derived from waste. Turning trash into a marketable CO₂ sink could divert material from dumps and shave a few percent off the overall capture energy penalty, though the process still relies on external power and could earn recycling credits.