Near IR reflectance characteristics of PMMA/ZnO nanocomposites for solar thermal control interface films

Thermal, Mechanical and UV-Shielding Properties of Poly(Methyl Methacrylate)/Cerium Dioxide Hybrid Systems Obtained by Melt Compounding

“…The highest distortion was obtained at 120˝C and is undoubtedly due to this temperature that some organic compounds or water or both can be still partially bonded with cerium powders. The formation of nanoceria powders by sol-gel contains complicated reactions; in the first instance, they began to nucleate into Ce(OH) 3 form, so the supplied energy during the sol-gel process and subsequent heat treatment must be enough for the complete conversion to Ce(OH) 4 nuclei and thereafter into CeO 2 nuclei via dehydration and subsequent growth of highly crystallized nanoceria.…”

“…PMMA is one of the most commonly used thermoplastic polymers in the construction industry because of its excellent optical properties (it transmits light in the 360-1000 nm range almost without loss [3]), impact and shatter properties (compared to inorganic glass), and relatively high weathering resistances. In addition, PMMA polymer has very low thermal conductivity (~0.0012 cal/s cm K), which makes it a candidate to be used as a thermal-control interface material [4,5]. Unfortunately, PMMA and other polymers decompose or degrade under solar UV radiation (200-400 nm) [6].…”

Enhanced near-infrared reflectance and functional characteristics of Al-doped ZnO nano-pigments embedded PMMA coatings

“…The value of wavelength, λ (in nm) corresponding to the absorption edge is substituted in the formula, E g (in eV)¼1239.8/λ. Near-infrared diffuse reflectance (NIR) of the AZO nano-pigment as well as AZO/PMMA nanocomposite coatings on glass substrate was measured using UV-vis-NIR spectrophotometer (Shimadzu, UV-3600) with an integrating sphere attachment, ISR-3100 using poly (tetraflouroethylene) (PTFE) reference as reported in earlier work [22,33,34]. The NIR reflectance measurements of the samples were performed in the wavelength 700 to 2500 nm range.…”

“…In fact, low-emitting surfaces decrease radiative heat transfer by reflecting the incident infrared radiation which reduces the radiative heat emission in the near-infrared spectral region. In our previous work [22], we reported the influence of nano ZnO morphologies upon near-IR reflectance in both ZnO pigments as well as ZnO pigmented PMMA polymer sheets. Here, we fabricated multilayered coatings of Al-doped ZnO nanopigments embedded in a PMMA matrix on glass surfaces for multifunctional applications.…”

Effect of zinc oxide on flexural and physical properties of PMMA composites

“…Polymethylmethacrylate (PMMA) is one of the most widely accepted thermoplastic material inorthopedic as well as maxillofacial implants due to its superior advantages such as excellent toughness,stiffness, transparent to visible light, and low thermal conductivity [1]. It acts as a bone cement to achieve implant fixation.…”