Molecular Formula | C6H8N2O |
Molar Mass | 124.14052 |
Appearance | shavings |
Storage Condition | Room Temprature |
MDL | MFCD00081515 |
Safety Description | 24/25 - Avoid contact with skin and eyes. |
WGK Germany | 3 |
CEC with a substitution degree of 0.2-0.3 has alkali solubility and good resistance to thermal degradation, and can be used as insulating paper for Transformers. The substitution degree is 0.7-1. CEC of O is water-soluble, has higher resistance to microorganisms, heat and acid degradation than pure cellulose (Cotton), and has better colorability and abrasion resistance; CEC with a substitution degree of 2.6~2.8 has special electrical properties, which is insoluble in water and alkali, but soluble in organic solvents, such as acetone, acetonitrile, acrylonitrile, dimethylformamide, pyridine, et al. CEC with high degree of substitution of 2.6~2.8 has high dielectric constant (12~15) and low dielectric loss tangent (0. 015), and has good electrical properties. It is a white fibrous solid, nitrogen content in 12.5% ~ 12.8%, can be used at about 125 ℃ for a long time, the tensile strength of 27. 44-34. 30MPa, dielectric strength 63~119. 5MV/m, surface resistivity (3~6) * 1012Q.
The preparation of cyanoethyl fiber has two kinds of homogeneous method and multiphase method. The preparation of CEC with high degree of substitution is a two-step homogeneous reaction technique using sodium hydroxide as catalyst and acrylonitrile as etherifying agent.
high dielectric constant cyanoethyl cellulose (CEC) is one of the major military projects of the former Ministry of Chemical Industry. Because of its high dielectric properties and other special properties, it can be used as an electroluminescent material instead of phosphor, and used as a material for manufacturing various forms of capacitors in small radar and optical weapons, high dielectric plastic sleeve in reconnaissance radar, etc. CEC with high degree of substitution has high dielectric constant and low dielectric loss at high temperature and high frequency, which has attracted great attention of the radio industry, the miniaturization of the volume of the components of the radio electronic equipment is promoted. High dielectric paints are also used in the field of radio.
This product is non-toxic, but the main raw material of acrylonitrile toxic. The finished product is packed in Kraft three-in-one composite bag, lined with polyethylene film bag, with a net weight of 25kg per bag, or packaged according to the needs of users. Storage should be placed in a clean, dry, ventilated warehouse to prevent sun exposure, away from heat sources. Transportation should be protected from the sun and rain.
A CEC coating layer was prepared by using styrene, gewax, or the like as an impregnating agent. For the electronics industry and laser energy storage capacitors.
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Overview | cellulose is the most abundant renewable resource on Earth, and because of its unique reaction function and molecular characteristics such as non-toxic, safe, biodegradable, hydrophilic, chiral and semi-rigid, it will become one of the main chemical raw materials in the future (J.Schurz,Prog.Polym.Sci.,1999,24,481). There are three active-OH groups on each anhydroglucose (AGU) unit in the cellulose molecular chain: a primary-OH group (C6 position) and two secondary-OH groups (C2 and C3 positions). Therefore, cellulose can undergo a series of chemical reactions related to-OH groups, such as oxidation reactions, ether, esterification reactions, nucleophilic substitution reactions, grafting reactions and unusual derivatization reactions. Among them, cellulose ethers and esters are the most important cellulose derivative products, and their applications are related to industry, agriculture, medicine and our daily life. Cellulose ether is a general term for a series of products formed by the reaction of alkali cellulose and etherification agent under certain conditions. Cellulose is difficult to dissolve in water and almost all organic solvents due to its strong intramolecular and intermolecular hydrogen bonding. The etherification reaction of cellulose is to break its strong hydrogen bonding by introducing substituents, and improve its hydrophilicity, especially in aqueous medium. |
Application | cyanoethyl cellulose has the unique properties of high dielectric constant (ε = 35~38), cyanoethyl cellulose with high degree of substitution also has the characteristics of high water resistance, high insulation and self-extinguishing, and has good liquid crystal behavior. Cyanoethyl cellulose can be used as an electroluminescent material, which is one of the best materials in the development of large screen TV emission screen, new radar screen, small and medium laser capacitor of optical weapon. It is mainly used for the main medium of high dielectric paint film and high dielectric film capacitor. It is also used in special light source as electroluminescent material and military plastic soft lamp as medium, high dielectric plastic sleeve in reconnaissance radar, etc. If the preparation of a cyanoethyl cellulose based high dielectric flexible nano composite film, the purpose is to provide a high dielectric constant, low dielectric loss, cyanoethyl cellulose-based high dielectric flexible nanocomposite film with good mechanical properties and thermal stability and preparation method thereof. A cyanoethyl cellulose-based high dielectric flexible nano-composite film is prepared by using cyanoethyl cellulose as a matrix, ceramic filler and conductive filler as auxiliary materials, and being prepared into a solution by casting into a film. |