화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.143, 335-346, 2015
Enhanced near-infrared reflectance and functional characteristics of Al-doped ZnO nano-pigments embedded PMMA coatings
Multifunctional surface coatings hamper the UV/Near-infrared (NIR) radiations and resist ice/fog formation finds ready use in green buildings. Here, aluminium doped ZnO nano pigment (AZO) was synthesized and incorporated into poly(methyl methacrylate) [PMMA] polymer matrix to fabricate AZO/PMMA multilayered coatings on glass surface. Functional properties such as UV absorption, NIR shielding, self-cleaning, surface hardness and scratch resistance were assessed for AZO/PMMA coatings. Results revealed that AZO pigmented PMIVIA coatings shield UV and IR radiations in the wavelengths 363 and 1100 nm, respectively. Al-doping helps to enhance the NIR reflectivity in ZnO pigment. Coatings retain optical transparency only upto 20 layers. Interestingly, AZO/PMMA coated glass surface shows significant surface temperature cut-off upto 8 degrees C even with 7 layers. The coated glass found to have anti-icing property compared to uncoated surfaces when dipping in liquid N-2. AZO/PMMA coatings can be an inexpensive interface/interphase layers for multifunctional glass windows. (c) 2015 Elsevier B.V. All rights reserved.