GoKawiilResearchers develop catalytic method to oxidize polyethylene surfaces without altering bulk properties
Scientists report a new technique that selectively converts methylene units on polyethylene's surface into ketones using a trace iron catalyst (0.001 mol%) and inexpensive oxidants at under 80°C. The process occurs at the solid-liquid interface, modifying only the plastic's surface chemistry while preserving bulk characteristics like melting point and tensile strength.
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Polyethylene makes up over a quarter of global plastic production but its surface resists adhesion, limiting its use in applications requiring bonding or coating. The researchers report their surface-functionalized material adheres up to 90 times more strongly to polar surfaces than untreated polyethylene, and up to 4 times better than polyethylene treated through older bulk methods, which could open new industrial uses without sacrificing the material's structural performance. The findings also suggest the surface modifications last longer than those from previous unselective treatments, though durability in real-world conditions remains to be tested at scale.
- A trace iron catalyst (0.001 mol%) selectively oxidizes polyethylene surfaces into ketones below 80°C using cheap oxidants.
- Surface-functionalized polyethylene shows up to 90-fold stronger adhesion to polar surfaces than untreated plastic, and 4-fold stronger than bulk-functionalized versions.
- The technique preserves bulk properties like melting temperature and tensile strength, unlike traditional uniform-medium functionalization methods.
Source: nature.com — Woroch, 2026-10-13
Published there as: “Selective, Catalytic Oxidation of Polyethylene Surfaces”
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