Light-colored conductive fabric coatings using uniform ATO@TiO 2 whiskers
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Light-colored conductive fabric coatings using uniform ATO@TiO2 whiskers Qiang Gao1,* 1 2
, Mingxu Wang1,2, Chunxia Gao1, and Mingqiao Ge2
College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
Received: 6 June 2020
ABSTRACT
Accepted: 31 August 2020
In this work, one-dimensional conductive TiO2 whiskers coated with antimonydoped tin oxide (ATO@TiO2) were prepared with a method of hydrothermal coprecipitation. Specially, sodium hexametaphosphate (SHMP) was used as an interfacial reactor to form sufficient active groups on the surface of TiO2 whiskers, which not only increased the reaction sites, but also formed the electric double-layer structure to promote the dispersion of TiO2 whiskers in aqueous solution. Additionally, four kinds of ATO@TiO2 nanomaterials with different appearances were introduced into waterborne polyurethane (WPU) emulsion to prepare the conductive paint for the surface coating of polyester fabrics. During the process of curing reaction, ATO@TiO2 whiskers are located in the coating mold to organize a conductive network in the form of a rod-to-rod connection. Compared with particle-type ATO@TiO2, the percolation threshold was drastically decreased from 45 to 7.5 wt%, meanwhile, this conductive paint shows excellent covering performance and the whiteness is up to 83.
Published online: 14 September 2020
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Introduction Exploitation of versatile strategies to prepare conductive fillers with high whiteness and low percolation thresholds is of great importance for the development of light-colored conductive coating. In recent years, conductive coatings are widely studied in both fundamental research and various applications, which play an important role in the fields of electrostatic protection [1], electromagnetic shielding
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https://doi.org/10.1007/s10853-020-05245-7
[2], microelectronic device [3–5], etc. Generally, conductive coatings are prepared by adding conductive fillers, including carbon black [6], metal nanoparticles [7, 8] and intrinsically conductive polymers [9–11], into the original matrix. For conductive coatings, an effective distribution and connection of conductive phases must be formed inside the matrix to provide a continuous conductive network for the transference of carriers. Meanwhile, the lower percolation thresholds are highly demanded to avoid the deterioration of mechanical
352 properties as well as high production cost. Based on this, one-dimensional (1D) fillers [12–16] have received increasing attention owing to their special geometric structure. Compared with conventional particle-type fillers, interactions between particles are replaced by the overlap of rod-to-rod, which drastically improve complexity of the conductive network. However, taking the conductive carbon mate
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