Sodium carboxymethyl cellulose is now widely used as a kind of cellulose, this product has more prominent characteristics, in order to fully understand its performance to give full play to it, which is easy to disperse in water functional characteristics as an example, to understand the dispersion of CMC-Na.
1, in the carrier liquid need to add suspension agent, used to prevent the phenomenon of gel precipitation, the main suspension agent can be glycerol, hydroxypropyl methyl cellulose and so on. The suspension agent should be soluble in the liquid carrier and can be compatible with the colloid, for sodium carboxymethyl cellulose, glycerol as a suspension agent, the usual addition of about 3%-10% of the carrier liquid.
2, in the dispersion system to add an appropriate amount of water, so as to improve the dispersion of colloidal particles in water, to ensure that the amount of water can not dissolve colloids.
3, in the alkalization and etherification reaction process should be added cationic or non-ionic surfactants, and to dissolve the liquid carrier and colloid can be compatible, commonly used surfactants are dodecyl sulfate, glycerin monoester, propylene glycol fatty acid ester, the addition of about 0.05%-5% of the carrier.
4, to disperse the colloidal particles in water soluble can be miscible, water-soluble gel does not dissolve or no water in the liquid carrier medium, but to ensure that the volume of the colloidal particles is larger so that it can be fully dispersed, such carriers are mainly mono alcohols, such as methanol and ethanol, ethylene glycol, acetone and so on.
5, to add water-soluble salt in the carrier solution, but the salt can not react with colloids. Its role is mainly to prevent the water-soluble gel from forming paste or condensation or precipitation when it is still, and sodium chloride is commonly used.
All in all, in the use of sodium carboxymethyl cellulose, in order to disperse it needs to be added to the right amount of water, remember that salt can not react with colloids, so in the use of CMC-Na, to pay more attention to avoid affecting its performance, to achieve the effect of use.
