Sodium Carboxymethy Cellulose Used in Food Industry
FAO and WHO have agreed to use pure sodium carboxymethylcellulose sodium cc for food, which is subject to very stringent biology, toxicology research and experimental consent, the international standard safe intake (ADI) is 25mg / (Kg · d), that is about 1.5 g / d per person. It has been reported that some people had an experimental intake of 10 kg and no toxic response. Carboxymethylcellulose CMC is not only an outstanding emulsifying stabilizer, thickener, but also has excellent freeze, melting stability, and can improve the flavor of the product and extend the storage time. In soy milk, ice cream, ice cream, jelly, beverages, cans in the amount of about 1% to 1.5%. CMC can also be vinegar, soy sauce, vegetable oil, fruit juice, gravy, vegetable juice and other components constitute a stable emulsion of lax, the amount of 0.2% to 0.5%. Especially the dynamic, vegetable oil, protein and aqueous emulsion function is extremely good, can make it constitute a stable homogeneous emulsion. Because of its safe and reliable, therefore, its use is not subject to national food hygiene standards ADI constraints. Carboxymethylcellulose CMC has been developed in the food field, and the use of sodium carboxymethyl cellulose in wine production has also been initiated.
Sodium carboxymethyl cellulose
Sodium carboxymethyl cellulose is directly mixed with water and formulated as a paste-like glue. In the equipment CMC paste, first with a mixing device in the mixing tank to participate in a certain amount of clean water, open the mixing equipment in the case, the CMC slowly evenly spread into the ingredients tank, mixing, so that CMC and Water completely blended, CMC can be enough to melt. In the melting CMC, the reason to be evenly dispersed, and constantly mixing, the intention is to “in order to avoid CMC and water meet, the agglomeration, agglomeration, decreased CMC dissolved amount of doubt”, and improve the dissolution rate of CMC. Mixing moments and moments when CMC is completely dissolved are two concepts. Generally speaking, the time of mixing is much shorter than the time required for the CMC to dissolve completely, depending on the circumstances.
The mixing time is determined by the fact that when the sodium carboxymethyl cellulose is uniformly lazed in water and no significant large agglomerates are present, the mixing can be stopped and the CMC and water are allowed to soak with each other in a standing condition, Blend with each other.
Assuming that the time required for the complete melting of carboxymethyl cellulose sodium cmc is based on several aspects:
(1) CMC and water completely bonded, there is no solid-liquid separation between the two;
(2) mixed paste was uniform and common situation, the appearance of smooth lubrication;
(3) mixed paste color close to colorless and bright, no paste in the granular objects. From the CMC was put into the mixing tank and water mixed with the beginning, to the CMC completely dissolved, the required time between 10 to 20 hours.
Sodium carboxymethyl cellulose (CMC) is anionic cellulose ether, the appearance of white or yellowish flocculent fiber powder or white powder, odorless and tasteless, non-toxic; soluble in cold water or hot water, constitute a certain viscosity Of the bright solution. The solution is neutral or slightly alkaline, insoluble in ethanol, ether, isopropyl alcohol, acetone and other organic solvents, soluble in water containing 60% ethanol or acetone solution. There is hygroscopicity, the stability of the heat, the viscosity decreases with the temperature rise, the solution in the PH value of 2 to 10 stable, PH less than 2, a solid separation, PH value is higher than 10 viscosity decreased. Discoloration temperature 227 ℃, carbonization temperature 252 ℃, 2% aqueous solution external tension 71mn / n.