There are many applications of batteries in our life, and there are many types. Among the applications of batteries, non-aqueous electrolyte secondary batteries are widely used in the electronic device market.
Among them, CMC sodium carboxymethyl cellulose also plays a large role in it, and its applications are mainly in notebook computers, electric vehicles and other equipment, which can be said to be widely used.
In this issue, Fortune Biotech will introduce to you the application of CMC sodium carboxymethyl cellulose in non-aqueous electrolyte secondary batteries.
Sodium carboxymethyl cellulose is used as a water-soluble dispersant and a thickener, and is used as a water-soluble dispersant for separators for non-aqueous electrolyte secondary batteries and separator coating solutions for non-aqueous electrolyte secondary batteries.
Separators for non-aqueous electrolyte secondary batteries are those having a structure in which a carboxymethyl ether group is substituted with a hydroxyl group in a glucose residue constituting cellulose.
Stripe-like defects on the surface of the dried separator for a non-aqueous electrolyte secondary battery can be greatly suppressed.
Also, if the sodium carboxymethyl cellulose is present undissolved, the undissolved sodium carboxymethyl cellulose shrinks after coating during the drying process, this problem can be prevented by using undissolved sodium carboxymethyl cellulose.
The generally recommended viscosity of sodium carboxymethyl cellulose is 100-2000 mPa.s (25°C) on a 1% aqueous solution B-type viscometer. The sodium carboxymethyl cellulose solution has good transparency, few gel particles and almost no fibers.
Sodium carboxymethyl cellulose is widely used in different industries because of its many and excellent properties, such as the use of non-aqueous electrolyte secondary batteries described above.
Among them, sodium carboxymethyl cellulose can be used in secondary batteries due to its water-soluble dispersant and thickener properties, and can be well used therein.
CMC sodium carboxymethyl cellulose is one of the most widely used cellulose types and can be widely used in food, medicine, daily chemicals, construction, etc. due to its safety and reliability. So what are the applications of sodium carboxymethyl cellulose in mortar?
1. Lubrication ability. All air-entraining agents act as wetting agents by reducing surface tension and helping to disperse the fines in the mortar when mixed with water.
2. Water retention. Sodium carboxymethyl cellulose prevents water from penetrating into the wall, and an appropriate amount of water stays in the mortar, so that the cement has a longer time for hydration. The water retention is proportional to the viscosity of the cellulose ether solution in the mortar. The better the water retention.
3. Air bubble content. High air bubble content results in better mortar yield and workability, reduces crack formation, it also reduces strength values, causing a "liquefaction" phenomenon. The air bubble content usually depends on the stirring time.
4. Anti-sag. A good sag resistant mortar means there is no danger of sagging or downflow when applied in thick layers.
Sag resistance can be improved by sodium carboxymethyl cellulose for construction, especially the newly developed sodium carboxymethyl cellulose for construction can provide better sag resistance of mortar.
To sum up, the role of sodium carboxymethyl cellulose in mortar, according to the above understanding, can provide convenience for use when using sodium carboxymethyl cellulose, which is beneficial to improve the efficiency of use in mortar.