This technology is an architectural exterior material featuring dense, dust-trapping trichome structures on the front of the plates attached to building walls, with a water tank at the top that releases stored water to flow down the plate surface.
Fine dust causes respiratory and cardiovascular diseases. While photocatalytic coatings have been proposed to decompose precursors, their effectiveness drops at night without sunlight, and high material costs have limited their widespread use as building exteriors.
This technology consists of trichome structures with a base attached to the plate and an extension that changes angle based on moisture content, featuring grid-like protrusions on the base and radial ones on the extension, with a diameter of 450–550㎛. The plate is divided into a base section and a pivoting section; when the latter tilts, a top packing unit opens the tank outlet to release water. A control unit can trigger water release based on infrared dust sensors or water levels. Applicable to roadside commercial and office buildings, facades of dust-sensitive facilities like schools and hospitals, and residential buildings near industrial complexes, it filters airborne dust day and night at a low cost and restores collection performance by self-cleaning with rainwater or stored water.
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