Why oil clings when water runs off
A strand of hair is covered by overlapping cells called the cuticle. Its outer surface tends to interact more readily with oily substances than with water, so oil can cling to the strand while water drains away. Hair does not act like a sponge that pulls oil deep into its center; much of the useful action happens on the surface and in the spaces between strands.
A mat creates a network of tiny traps
When clippings are packed into a mesh tube or pad, thousands of strands form a tangled, porous structure. Oil spreads over the hair and collects in the narrow gaps between strands, while water can pass through more readily. The tangle also gives the oil many surfaces to contact, making a loose handful of hair more useful as a contained mat than as scattered clippings.
Cleanup groups can place these hair-filled barriers where floating oil needs to be gathered, then lift them out for handling and disposal. The hair is a collection material, not a way to make the oil disappear: the trapped oil still has to be managed safely.
A haircut becomes a small tool
The idea turns a routine waste product into a material that can help collect oily pollution. Its value comes from a simple combination: hair’s surface affinity for oil and the many small spaces created when strands are bundled together. After a haircut, the clippings can therefore have a second use—as part of a barrier that gathers oil while much of the surrounding water runs through.
