Sodium carboxymethyl cellulose nature-Iota

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Service > Sodium carboxymethyl cellulose nature

Sodium carboxymethyl cellulose nature

1, CMC is a cellulose ether. Pure white or slightly yellow lines fibrous powder or granules, odorless, tasteless, non-toxic, but in general industry

Product because it contains sodium hydroxide, sodium acetate, sodium oxide and hydroxyl and other impurities, so yellowish, salty taste, generally used CMC is insoluble in acid and methanol, ethanol

Ether, acetone, chloroform, benzene and other organic solvents, soluble in water to form a colloidal solution, instead of the water-soluble it is an important factor, viscosity

Is also a great influence on the water-soluble, generally a viscosity of about 250-500 centipoise, instead of about 0.3, was gradually alkali-soluble, instead of above 0.4

That is water soluble, instead of rising with the transparency of the solution is also improved correspondingly. CMC with other ion electrolytes have the same properties, in dissolution

When first produced swelling phenomenon, so the preparation of the solution, so as to uniformly wet the individual particles, i.e., can dissolve quickly, otherwise the CMC after swelling in water.

Between the particles adhere to each other to form a strong film or stick into micelles that is not easy to disperse and dissolve difficulties.

2, CMC hygroscopic, the equilibrium moisture content of the CMC with the air humidity increases, decreases with increasing temperature, at room temperature and the average

Temperature of 80-85%, the equilibrium moisture content above 26%, the product moisture of about 7% lower than the equilibrium moisture. Its shape even when an aqueous 15%

So, there is almost no difference in appearance, but more than 20% moisture content, can be seen in the mutual adhesion between the sticky part of the child, especially those of high viscosity

More apparent.

3, an important characteristic of the CMC is able to form a colloidal solution of a high viscosity. The main factors that affect viscosity are: concentration, PH, temperature,and instead of salts.

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