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What factors affect the properties of carboxymethyl cellulose?
The performance of carboxymethyl cellulose is not only related to the degree of substitution, but also related to the homogeneity of the distribution of carboxymethyl groups in the whole cellulose molecule and the homogeneity of the substitution of hydroxyl methyl in each unit of each molecule.
With carboxymethyl cellulose CMC is high polymerization linear compounds, and the carboxymethyl exist in the molecules replace inhomogeneity, so when the solution let stand molecules exist different orientation, when the presence of shear force in the solution, its long axis linear molecules have turned to the trend of the flow direction, and the stronger the trend with the increase of shear rate, until finally completely orientational, this feature is called pseudoplastic of carboxymethyl cellulose. The pseudoplasticity of CMC is beneficial to reduce the energy consumption of liquid milk production, and is conducive to homogenization and pipelining transportation. In liquid milk, the taste of CMC is not too oily, and it is conducive to the release of milk aroma.
In addition, the viscosity is also a factor affecting the performance of carboxymethyl cellulose. The viscosity is mainly related to the molecular weight, and the degree of substitution is not much related to the degree of substitution. The molecular weight is also large, because the molecular weight of the carboxymethyl is larger than that of the hydroxyl group before the substitution.
How to dissolve carboxymethyl cellulose:
Carboxymethyl cellulose is a naturally occurring hydrophilic thing, carboxymethyl cellulose particles scattered in water, will immediately swelling and then dissolve
1, in the situation of mixing things, slowly participate in carboxymethyl cellulose, can accelerate the dissolution;
2, in the condition of heating things, spread to participate in carboxymethyl cellulose, can increase the dissolution rate, but the heating temperature is not suitable for too high, the appropriate range of 50°C-60°C;
3, When mixed with other materials, solid mixing should be carried out first, and then dissolved, and the dissolution rate can also increase.
4, in a carboxymethyl cellulose insoluble but can and water soluble organic solvents such as alcohol, glycerin, and then dissolve, the dissolution rate will be very fast.
Carboxymethyl cellulose is water soluble, just pay attention to when adding to a side and a side slowly sieve into the addition, if a spoonful or the whole bag into the solution will be difficult to dissolve, or can be mixed with other solid materials and average then added to the water.
From the point of view of carboxymethyl cellulose itself, if your CMC dissolution is very bad, light transmittance is not high, you need to increase the replacement degree of CMC and the average of the CMC.
Or, if your product itself does not dissolve the problem, that is to say, the dissolution is very bright, very transparent, no free filaments, you can heat water to dissolve. It dissolves faster.
Instant sodium carboxymethyl cellulose (CMC) product introduction
Because of the characteristics of CMC itself, it is easy to appear the phenomenon of agglomeration when it is dissolved into water, so that it causes difficulties in the pulping operation process, and workers spend time and labor in the operation.
To cater to customers' habits, we through the study of the surface treatment of CMC powder, developed a can quickly dissolve in cold water product, this product is in use process need to weigh the good CMC, directly into the cold water through stirring gently dissolves in the water, about 15 minutes to apparent viscosity, viscosity in about 30 minutes to get stable, by adding other materials to use.
Sodium carboxymethyl cellulose (CMC) technical index
ITEM |
D.S |
Viscosity |
Purity |
PH |
Moisture |
SR-1 |
≥0.95 |
500-700 |
≥95 |
6-8 |
7-10 |
SR-2 |
≥0.95 |
800-1000 |
|||
SR-3 |
≥0.90 |
2500-3000 |
|||
SR-4 |
≥0.80 |
3200-3500 |
Note: according to customer needs, we can provide small products with the same index.