CAS:65530-66-7，2-(Perfluoroalkyl)ethyl methacrylate

A fluorinated polymer dispersed liquid crystal (PDLC) film with low operating voltage and high contrast ratio was successfully fabricated via the ultraviolet-initiated polymerization induced phase separation method. Effects of chemical structure and weight ratio of fluorinated monomers on the properties of PDLC films were systematically investigated through characterization of electro-optical response, micro morphology, optical spectrum and thermal analysis. Compared with the primitive sample, the addition of fluorinated monomers effectively improves the electro-optical properties of the film. The threshold voltage (Vth) is decreased by 39.7 % from 6.3 V to 3.8 V and the saturation voltage is reduced by 30 % from 15.8 V to 11.8 V for a 20 μm-thick film. Besides, the contrast ratio is improved to 110. Meanwhile, its thermal stability and hydrophobic property are also improved. Additionally, due to the abundance of C-O and C-F bonds in these compounds and the porous structure, the prepared film allows for transmittance modulation of sunlight. This research is anticipated to provide an innovative approach to optimize the performance of PDLC films for practical applications.

Designing a coating with a comprehensive range of anti-icing properties is a difficult challenge in the current complex and variable icing environment. Bionic anti-icing coatings have received widespread attention in recent years, but their exposure to mechanical damage conditions tends to result in insufficient durability. This work proposes a novel approach inspired by the antifreeze proteins (AFPs) found in fish, wherein a durable interpenetrating coating with excellent anti-icing and deicing performance is designed by combining a fluorinated amphiphilic ionic polymer with a biomimetic binder. The incorporation of hydrophobic fluorinated chain segments and amphiphilic ionic chain segments effectively inhibits ice nucleation (DT = 2010 s, TIN = − 22.1 °C), slows down ice propagation, and reduces ice adhesion (τ = 22.2 kPa) through the synergistic effect of hydrophobicity and ionic specificity. Furthermore, the addition of a bionic binder to create an interpenetrating network enhances the mechanical properties and anti-icing durability of the coating. Moreover, it can further function as anti-fogging, self-cleaning, and antibacterial for glass surfaces, demonstrating significant potential in the new generation of optical and medical devices.

We offer a laminated diaphragm that reduces the adhesion of the diaphragms to each other. The laminated diaphragm (4a) of a mode of the present invention is a laminated separator with a heat-resistant layer (2a, 2b) on one or both sides of a polyolefin substrate (1), wherein the laminated separator has a particle layer (3a, 3b) on at least one side, the particles contained in the particle layer contain thermoplastic resin, the average particle size of the particles is more than 0.1 μm and less than 3.0 μm, and the content of the inorganic filler in the heat-resistant layer is less than 70 wt%.