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  • Thermoresponsive polymer induced sweating surfaces as an efficient way to passively cool buildings.

Thermoresponsive polymer induced sweating surfaces as an efficient way to passively cool buildings.

Advanced materials (Deerfield Beach, Fla.) (2012-08-31)
A C C Rotzetter, C M Schumacher, S B Bubenhofer, R N Grass, L C Gerber, M Zeltner, W J Stark
PMID22933383
ABSTRACT

Buildings can be effectively cooled by a bioinspired sweating-like action based on thermoresponsive hydrogels (PNIPAM), which press out their stored water when exceeding the lower critical solution temperature. The surface temperature is reduced by 15 °C compared to that of a conventional hydrogel (pHEMA) and by 25 °C compared to the bare ground.

MATERIALS
Product Number
Brand
Product Description
724459
Sigma-Aldrich
Poly(N-isopropylacrylamide), carboxylic acid terminated, average Mn 10,000
535311
Sigma-Aldrich
Poly(N-isopropylacrylamide), Mn ~40,000
900188
Sigma-Aldrich
Poly(N-isopropyl acrylamide), NHS ester end functionalized, average Mn 5,000