Preparation of stable aqueous suspensions of antimony-doped tin oxide nanoparticles used for transparent and thermal insulation fluorocarbon coating

Abstract

In order to prepare the highly stable aqueous suspensions of antimony-doped tin oxide (ATO) used for the transparent and thermal insulation fluorocarbon coating, the effect of sodium polyacrylate (PAAS) and polyvinyl alcohol (PVA) on the stability of the suspensions was investigated. The stability and dispersity of the suspensions were characterized using zeta potential analyzer, ultravioletvisible spectrophotometer, and scanning electron microscope. No sediments were observed after 6-month storage of the ATO suspensions containing 0.1 wt% PAAS and 2.0 wt% PVA. The reason why aqueous suspensions were capable of stabilization was explained from a theoretical perspective. A new model of steric hindrance for colloid particles stabilized by binary dispersant was proposed, which may have positive contribution to other colloid system containing two dispersants. A nanocomposite fluorocarbon coating, exhibiting a good thermal insulation and high transmittance, was formed after ATO suspensions were added in fluorocarbon emulsion.The temperature inside the chamber was decreased by 6.0°C, and 75.0 % visible light rays could pass through the coating.

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Tungsten Suboxide Nanoneedles as an Effective Thermal Shield through Near-Infrared Reflection and Absorption

“…Although this argument based on LSPR and polaron is quite popular in the literature, ,, it, however, cannot account for the fact that from our UV–vis study (Figure ), the main contributing factor to the samples’ thermal shielding property is due to the selective high reflectance at the NIR region. The absorbance of NIR (Figure b), though present, is not the greatest contributing factor.…”

“…Passive windows are thus more viable as they can persistently shield heat transmission without the need of additional input. Many materials have been investigated for this purpose, such as copper, copper sulfide, titanium dioxide, vanadium oxide, polymers, as well as the associated material dopants. − …”

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