Preparation and characterization of PVC/Cs_xWO₃ composite film with excellent near‐infrared light shielding and high visible light transmission

Abstract

Near‐infrared (NIR) shielding is essential not only in the building and automobile glass films but also in achieving energy conservation. However, effectively shielding NIR and maintaining high transmittance in the visible light region have been great challenges in the past decade. Recently, hexagonal cesium tungsten bronze (CsxWO3) nanoparticles have been widely studied due to the excellent transparency in the visible light region and strong heat‐shielding ability in the NIR region. Herein, a design concept of transparent polyvinyl chloride (PVC)/CsxWO3 composite film, as a heat insulation material for glasses, was proposed. To achieve this purpose, the PVC/CsxWO3 composite film was prepared by incorporating CsxWO3 slurry with better dispersion than traditional CsxWO3 nanoparticles powder into a transparent PVC matrix. By the UV‐Vis‐NIR spectrophotometer characterization, the PVC/CsxWO3 composite film containing 2.1 phr CsxWO3 slurry displays high blocking of NIR (78%) and high transmittance of visible light (76%). In order to further understand the actual heat insulation effect from the PVC/CsxWO3 composite films, the indoor sunlight simulation test and outdoor cooling experiment with solar illumination variations were carried out, which both showed heat insulation that is superior to the antimony tin oxide and indium tin oxide thin films prepared in our previous work. In addition, the mechanical property of PVC/CsxWO3 composite films shows almost no change with the increase of CsxWO3 slurry. The PVC/CsxWO3 composite films simultaneously achieve excellent shielding of NIR and high transmittance of visible light, which makes it an ideal material to alleviate the current building energy consumption issues.

Preparation and characterization of plasticized polyvinyl chloride composite film based on photochromic intelligent cooling

“…[ 31 ] For the PVC/photochromic powders composite films, the peaks of 2957, 2929, 1734, and 695 cm −1 mainly come from the contribution of the plasticized PVC film. [ 32 ] The peak around 1549 cm −1 is found in the PVC/photochromic powders composite films, mainly due to the stretching vibration of C═N on the photochromic powders, indicating the existence of photochromic powders in the plasticized PVC composite films.…”

Advancements in Transparent Conductive Oxides for Photoelectrochemical Applications

“…Among these dopants, In and Sb are the most frequently used and have been demonstrated to enhance the transparency and conductivity of SnO 2 . Sb-doped SnO 2 (ATO) has gained remarkable attention owing to its low cost, high transmittance in the visible light range, and high absorption in the NIR region [83]. The doping of Sb 5+ ions into the SnO 2 lattice creates an SbO 4 tetrahedron, which increases the electron concentration and decreases the band gap of the material.…”

Preparation of Copper-Doped Zinc Oxide (CZO) Nanoparticles and CZO/Acrylic Copolymer Emulsion with Polyvinylpyrrolidone (PVP) Coated on Glass Substrate for Optical Properties

“…The CZO powder, at 1, 5, and 10 mol%, presented low visible light reflectance and, therefore, high visible light transmission, that is, the visible light can pass through the sample, causing transparency to occur. Most of the visible light is transmitted because of the large bandgap of the CZO NPs [32]. The band gap of CZO material is about 3.7 to 3.09 eV, depending on the Cu doping concentration [33].…”