Selective, Catalytic Oxidation of Polyethylene Surfaces.

Catalytic functionalization of polyethylene at a solid-liquid interface enhances surface adhesion up to 90-fold without altering bulk properties, using only 0.001 mol% iron catalyst below 80°C.

• Why it matters: Improving polyethylene's surface properties without compromising its bulk characteristics addresses a key challenge for expanding its commercial applications, as pristine PE lacks adhesion and other critical features.
• What they did: The authors developed a method for selective catalytic functionalization at the solid-liquid interface, converting methylene units to ketones with inexpensive oxidants and minimal catalyst, and compared it to uniform medium functionalization.
• The result: PE surfaces treated with this method exhibit significantly increased adhesion—up to 90-fold compared to pristine PE—and the enhanced properties persist longer than those achieved by other unselective oxidation techniques, enabling new material functionalities.