The application potential of superhydrophobic coatings is inherently constrained by their stability, durability, and apparent color characteristics. To address these limitations, a thin superhydrophobic coating was prepared on the surface of cotton fabric, featuring a micron mastoid structure with distinct fiber boundaries. This coating is achieved through the grafting of polymer poly (trifluoroethyl methacrylate-random-glycyl methacrylate) and 3-(trimethoxysilyl) propyl methacrylate modified SiO 2 nanoparticles onto the fabric surface. The chemical composition, thermal stability and micro/nano structure of the coating were evaluated by infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and scanning electron microscopy. The superhydrophobic coating not only exhibits exceptional oil-water separation capabilities, achieving a remarkable separation efficiency of 98%, but also ensures high reusability, enduring up to 10 consecutive oil-water separation cycles without significant performance degradation. Furthermore, the coating manifests mechanical stability and durability, maintaining its superhydrophobic nature even after undergoing rigorous mechanical abrasion, immersion in acidic and alkaline solutions, as well as exposure to elevated temperatures. In addition, an in-depth analysis was conducted to evaluate the influence of this superhydrophobic modification on the inherent characteristics of cotton fabric, specifically its color, whiteness, and gloss. The findings reveal that the hue of the cotton fabric remains unaltered, while a marginal enhancement in whiteness and a slight reduction in gloss are observed post-modification, indicating small impact on the inherent characteristics of cotton fabric.
The room and low-temperature performances of solid-state lithium batteries are crucial to expand their practical application. Polyethylene oxide (PEO) has received great attention as the most representative polymer electrolyte matrix. However, most PEO-based solid-state batteries need to operate at high temperature due to low room temperature ionic conductivity . Improving the ionic conductivity by adding plasticizers or reducing the crystallinity of PEO often compromises its mechanical strength . Here, an amorphous PEO-based composite solid-state electrolyte is obtained by ultraviolet (UV) polymerizing PEO and methacryloyloxypropyltrimethoxy silane (KH570)-modified SiO 2 which demonstrates both satisfactory mechanical performance and high ionic conductivity at room (3.37 × 10 −4 S cm −1 ) and low temperatures (1.73 × 10 −4 S cm −1 at 0 °C). In this electrolyte, the crystallinity of PEO is reduced through cross-linking, and therefore provides a fast Li + ions transfer area. Moreover, the KH570-modified SiO 2 inorganic particles promote the dissociation of lithium salts by Lewis acid centers to increase the ionic conductivity. Importantly, this kind of cross-linking networks endows the final electrolyte much higher mechanical strength than the pure PEO polymer electrolyte or PEO-inorganic filler blended systems. The solid-state LiFePO 4 /Li cell assembled with this electrolyte exhibits excellent cycling performance and high capacity at room and low temperatures.
危险品化学品经营许可证（带存储）