What is the Role of Sodium Carboxymethyl Cellulose in Lithium Ion Batteries?

1. What is sodium carboxymethyl cellulose?

Sodium Carboxymethyl Cellulose (CMC) is an anionic linear polymer material, non-toxic, tasteless, and odorless. It is usually a white or slightly yellow powder. Its preparation process includes solvent method and water medium method. The solvent method is suitable for preparing medium and high-grade CMC, and the water medium method is suitable for preparing medium and low-grade CMC.

2. Physical and chemical properties of sodium carboxymethyl cellulose

(1) SOLUBILITY

Water is the best common solvent for sodium carboxymethyl cellulose. The dispersibility of CMC in water is related to its degree of substitution and molecular weight. When the degree of substitution is greater than 0.4, it has good water solubility. CMC is soluble in glycerol under heating and good stirring conditions, and is more soluble in the presence of a small amount of water.

(2) HYGROSCOPICITY

Sodium carboxymethyl cellulose is a highly hydrophilic polymer material with good hygroscopicity. Its equilibrium moisture content increases with the degree of substitution of the product. At 25°C, the CMC with a substitution degree of 0.4 has a moisture absorption rate of about 20% at a relative humidity of 80%. When the degree of substitution reaches 1.2, the moisture absorption rate of sodium carboxymethyl cellulose can be as high as 35% or more.

(3) FILM-FORMING PROPERTIES

Good film-forming is another one of the sodium carboxymethyl cellulose properties. Generally, the films made of CMC with high viscosity and high molecular weight have high strength and high flexibility. It is this performance that is used in some industries. The film formed by mixing resin and CMC using some aqueous solutions can be dried and plasticized to become a water-insoluble film product.

3. Battery grade sodium carboxymethyl cellulose

Substituting carboxymethyl cellulose sodium system for polyvinylidene fluoride (PVDF) used in traditional battery production can reduce costs and reduce pollution. At the same time, because the production process does not require environmental humidity, the battery capacity can be increased and the cycle life can be extended. At the end of battery life, sodium carboxymethyl cellulose is easier to decompose than PVDF. When studying the cyclic voltammetry curves of polysulfonate (AQ) based electrodes when using different binders. Among them, the peak potential difference of the oxidation-reduction peak of sodium carboxymethyl cellulose is smaller than when PVDF is used, indicating that the reaction is less hindered, and the sodium carboxymethyl cellulose binder is more conducive to the occurrence of redox. Sodium carboxymethyl cellulose as a binder can be used in different types of electrode materials such as natural graphite, mesocarbon microspheres, lithium titanate, tin-based silicon-based anode materials and lithium iron carbonate cathode materials, which can increase battery capacity, cycle stability and cycle life are improved compared to when PVDF is used. As a professional sodium carboxymethyl cellulose manufacturer, we provide battery-grade carboxymethyl cellulose that stabilizes the structure of the electrode, prevents sedimentation of active substances, and enhances charging and discharging performance. Contact us now to choose sustainability and efficiency for your next project.

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How to Use Sodium Carboxymethyl Cellulose in the Food Industry?

Sodium carboxymethyl cellulose in food has the functions of thickening, emulsifying, forming, water retention and stabilization. Sodium carboxymethyl cellulose in food can reduce the cost of food production, improve the quality of food, improve the taste of food, and prolong the shelf life of food. It is an ideal food additive for the food industry. It can be widely used in various solid and liquid beverages, canned foods, candies, pastries, meat products, biscuits, instant noodles, etc. Rolled noodles, instant boiled food, frozen snacks and soy milk, yogurt, peanut milk, fruit tea, fruit juice and other food production.

In different foods, sodium carboxymethyl cellulose in food has different uses and dosages.

1. Application of CMC in soymilk. CMC can suspend, emulsify and stabilize soybean milk. It can organically fuse the mixed slurry and prevent fat floating or protein sinking. Moreover, it can play an active role in whitening the color of soymilk, sweetening the taste and removing the smell of beans.

2. Application of CMC in flour products.

(1) The sodium carboxymethyl cellulose uses for food in bread production can make the honeycomb of bread uniform, increase its volume, reduce the phenomenon of slagging, make the bread not collapse, and have the function of heat preservation and freshness preservation.

(2) CMC in food can be used in the production of instant noodles and rolled noodles, which can enhance the toughness of noodles, improve the cooking resistance of noodles, and make the taste of noodles delicate and lubricated. At the same time, adding CMC in instant noodle production can save oil consumption, reduce production costs and improve economic benefits.

As a sodium carboxymethylcellulose supplier, we will do our best to meet all the needs of customers.

How to Use CMC Powder

Sodium carboxymethyl cellulose can also be called sodium carboxymethyl cellulose, china carboxymethyl cellulose, or CMC in English. It is the most widely used cellulose type in the world. It has many advantages, so it has been widely used in many fields. The correct use of CMC can play a very good role in promoting, once it is not used correctly, not only does it not have the desired effect, but also a large amount of material will be wasted, which will cause a great loss if it is a large production. So, how to use CMC powder?

When it comes to how to use CMC powder, we will first observe that sodium carboxymethyl cellulose is not in powder form. In addition to mixing with dry powder directly, its use often needs to be dissolved and used after the formation of a colloidal solution. In order to achieve the ideal effect of mechanical mixing in water. The specific operation is to start the mixing equipment, add an appropriate amount of pure water, and then slowly sprinkle CMC powder in the mixing device. This can effectively prevent CMC from agglomerating and agglomerating when dissolving.

The colloid prepared by the above method is clear and transparent, no caking phenomenon, relatively uniform, and the effect is especially good. From the process, it can be seen that the secret of dissolution is stirring. Only by constantly stirring can the caking part disperse, and the powdered CMC can fully contact and mix with pure water.

Ice cream is a kind of frozen food made from milk, white milk, maltose, maltodextrin, edible oil, fresh egg, compound emulsifying stabilizer and food flavour. It has the characteristics of delicate taste, smoothness and high nutritive value. Because water is the main ingredient in ice cream production, and the excessive use of water can reduce production costs, it will also have a certain adverse impact on product quality and will promote the formation of more rough ice crystals in ice cream, thus affecting the taste.

In the ice cream industry, there are usually several measures to solve this problem:

(1)To increase the solid content in ice cream production materials, we usually increase the amount of solid raw materials such as dairy products, sugar, maltodextrin, edible oil and so on. The addition of these solid materials can fill and block the formation of large ice crystals. However, an excessive increase in solid raw materials will increase production costs and reduce the market competitiveness of products.

(2)Improve the production process of ageing and freezing, but this requires higher equipment, which will increase the cost of equipment procurement and operation.

(3)Adding a certain amount of emulsifying stabilizer to inhibit the formation of rough ice crystals is economical and beneficial to the control of production costs.

The emulsifying stabilizer is a kind of compound food additive, which is composed of a thickening stabilizer, emulsifier and buffer. When used in ice cream products, it can improve the structure and taste of ice cream and reduce production costs. As a thickening stabilizer, CMC powder used in ice cream is also used in the production of a variety of emulsifying stabilizers. Ice cream CMC powder can make the ice cream material get higher viscosity, and can improve the emulsifying ability of protein in the material so that the structure of the ice cream becomes delicate and soft, the taste is smooth, the texture is thick and biting, and has good melting resistance.

In actual production, CMC powder for ice cream can reduce the production of large ice crystals in ice cream, enhance the melting resistance and delicate lubrication taste of ice cream, whiten the color of ice cream, and increase the volume of ice cream. At the same time, CMC stabilizer for ice cream can also reduce the use of solid raw materials and the production cost of ice cream.

If you want to know more types of CMC ice cream stabilizer, please visit our website.

As a carboxymethyl cellulose factory, we will do our best to meet all the needs of customers.

1. Application of CMC textiles in warp sizing

After the surface layer of the warp yarns sizing by CMC is dried, it can form a film that is not only strong, but also quite soft and wear-resistant, so that it has good adhesion to the fiber surface. And at the same time, the warp yarns can have sufficient stretch. Long characteristics increase the strength of the warp yarn on the loom and reduce the doffing rate. The use of CMC textiles has the following advantages:

1) Green product, ecological and environmental protection, it is completely biodegradable;

2) Pulping is simple and clean, doesn't need to heat and cook. It is low carbon and energy saving, and can be dissolved in cold water;

3) No gel deposition, no skinning or foaming in the slurry tank and pipeline;

4) Temperature resistance, antibacterial, stable slurry viscosity;

5) It is easy to split yarn, and the yarn has no sticking phenomenon in the high-humidity weaving workshop;

6) The slurry film is tough and wear-resistant, improves the weaving efficiency, and reduces the yarn breakage to a lower level;

7) It doesn't need to use enzyme to desize, the grey fabric can be directly cooked or bleached.

2. Application of CMC textiles in textile printing

The ultra-high degree of substitution CMC textiles can be used as a thickener for various textile printing pastes. It has excellent acid and salt resistance (ie, electrolyte resistance). After being formulated into pastes and printing pastes, the viscosity is stable and can completely replace alginates with high-quality. The product has the following characteristics:

1) Better moisture absorption to increase color matching rate and vividness;

2) Good permeability, fabric embossing, which not only eats deep and transparent, but also reduces labor intensity;

3) Excellent rheological properties to keep printing smooth;

4) High solubility, high transparency, almost no gel, good filterability

5) Good viscosity stability, water retention and net permeability to improve the clarity of pattern outline;

6) Easy desizing, soft texture.

3. Application in CMC textiles fabric finishing

The fabric is coated with CMC water solution and then treated with acetic acid to make a special fabric that is airtight and waterproof. The fabric is treated with CMC aqueous solution first, then treated with easily decomposable quaternary ammonium salt, dried, polished and heated at an appropriate stage to form a waxy fabric with an insoluble coating on the surface.

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