Materials

Introduction

Materials are the cornerstone of modern technology and industrial development, and they make up the world around us. From housing construction to electronic equipment, from transportation to medical equipment, various fields are inseparable from the application of materials. They determine the performance, reliability, and durability of the product. The excellent properties of organic fluorides make them widely used in the field of materials. When they are used in liquid crystal materials, they often make the materials show high dielectric anisotropy and low rotational viscosity. When used in sealing materials, they make the materials show good high temperature and low temperature resistance. And when used in battery materials, they make the materials exhibit high thermal stability and good durability. With the development of more and more organic fluorides and the exploration of their properties, the application of organic fluorides in the field of materials will continue to increase.

Applications Of Organic Fluorides In Materials

Organic fluorides are widely used in various materials, such as liquid crystal materials, sealing materials and battery materials.

• Liquid crystals (LC) materials. The attributes of organic fluorides such as excellent stability, low polarization give rise to subtle modifications regarding mesophase morphology, melting point and transition temperatures as well as dielectric, optical and visco-elastic properties of the liquid crystals, and thus providing excellent conditions for use in active matrix liquid crystal displays (AM-LCD). Kirsch et al. have recently presented a series of new superfluorinated materials (SFM) that were developed for the use in AM-LCDs. Starting from organic fluorides with simple structures, they synthesized complex five-ring organic fluorides, which are materials with unprecedented properties. These materials show a very high dielectric anisotropy, a low rotational viscosity, a high clearing point and an excellent solubility, which makes them ideal candidates for the utilization in liquid crystal mixtures, even when applied at large concentration without risking crystallization or conversion to smectic phases upon long-term storage at low temperatures^[1].

Fig.1 Two examples of new SFM

• Sealing materials. Fluororubber produced by copolymerization of organic fluorides is widely used as sealing materials under harsh conditions. For example, the perfluoroether rubber produced by the copolymerization of perfluoroether is resistant to N₂O₄ medium, high temperature and low temperature, and is used for sealing rocket fuel systems in missiles and spacecraft. In addition, fluororubber with high fluorine content can bee used for sealing automobile engines to solve the problem of fuel leakage.

• Battery materials. Polymer compounds generated by the polymerization reaction of organic fluorides are widely used as electrode materials and battery casing materials for energy storage devices such as lithium-ion batteries, nickel-metal hydride batteries, lithium-air batteries, and lithium-sulfur batteries. Organic fluorides are also used in battery electrolytes. For example, fluoroethylene carbonate is a commonly used additive for lithium-ion battery electrolytes, which can form a good solid electrolyte interface (SEI) film on the surface of the negative electrode, thereby preventing further decomposition of the electrolyte and improving the low-temperature performance of the electrolyte. In addition, organic fluorides are also used in the preparation of membrane materials for fuel cells.

Alfa Chemistry provides high-quality organic fluorides, which are widely used in various materials such as liquid crystal materials, sealing materials and battery materials. We will offer the most suitable organic fluorides according to customer's detailed requirements. At the same time, we also offer product customization. Alfa Chemistry provides you with the most professional services and the most favorable prices to buy organic fluorides. Please don't hesitate to contact us.

Reference

1. Kirsch, P.; et al. Super-fluorinated liquid crystals: Towards the limits of polarity. Eur. J. Org. Chem. 2008, (20): 3479-3487.