![]() ![]() Introduce new functional groups on starch molecules or change the size of starch molecules and properties of starch particles, so as to change the natural characteristics of starch (such as: paste temperature, thermal viscosity and its stability, freeze-thaw stability, gelatinous force, film-forming properties, transparency, etc.) and make it more suitable for certain applications. Sodium carboxymethyl cellulose (CMC) is usually made by the reaction of natural cellulose and caustic soda and a chlorine acetic acid made after the production of an anionic polymer, cellulose carboxymethyl ether sodium salt, molecular weight is 6400 (± 1000).ĬMC is a modified natural cellulose, the United Nations Food and Agriculture Organization (FAO) and the World Health Organization (WHO) has officially called it "modified cellulose".ĬMC is white or milky white fibrous powder or granules, density is 0.5-0.7 g / cm3, almost odorless, tasteless, hygroscopic, easy to disperse in water into a transparent colloidal solution in the ethanol and other organic solvents insoluble.ĬMC has the functions of bonding, thickening, enhancing, emulsification, water retention, suspension and so on.Įxperiments found that CMC dissolved in cold water has a poor dispersion, and is quite easy to hold a group, so the use of CMC should be evenly spread, and constantly stirring.ĬMC dissolved in cold water at high speed after stirring is easy to produce bubbles, after a period of time to form a homogeneous transparent solution.Īdding CMC to the hot water will appear slightly clumping phenomenon, but with stirring, CMC is completely dissolved in hot water to form a highly transparent solution.īased on the inherent properties of natural starch, physical, chemical or enzymatic treatment is used to improve the properties of starch and expand its application range. Guar gum dissolves faster in hot water, and the solution formed is slightly yellow in color and not high in transparency, and the obtained solution has the taste of bean powder. Guar gum can form a high viscosity solution after dissolving in water, so it can be widely used in food, industrial and pharmaceutical industries.Įxperiments found that guar gum dispersion is good, soluble quickly in water, and form a slightly yellow translucent solution. The commercial gum is generally a white to light yellow-brown free flowing powder, close to no smell, and no other peculiar smell, generally contains 75% ~ 85% of polysaccharide, 5% ~ 6% of protein, 2% ~ 3% of fiber and 1% of ash. Guar gum is a kind of non-ionic galactomannan, and the raw material is the endosperm part of guar bean after the seeds are peeled and the endosperm is removed, the process is as follows.Ĭleaning, drying and crushing, adding water, hydrolyzing under pressure, precipitating with 20% ethanol, separating by centrifugation, drying and crushing. Therefore, xanthan gum dry powder can be mixed with salt, sugar and other dry powder and then slowly added to the water being stirred to make a solution. Xanthan gum can quickly dissolve to cold water, but has a strong hydrophilic, so if the stirring is not sufficient, the outer layer of water absorption and swelling into glue group, will prevent water into the inner layer. It is widely used in various fields of national economy. It is an acidic extracellular polysaccharide composed of carbohydrates from Xanthomonas xanthomonas of Brassica campestris, which breaks 1,6-glycosidic bond and opens the branched chain, then synthesizes the straight chain by 1,4-bond through aerobic fermentation bioengineering technology.īecause of its macromolecular special structure and colloidal properties, and has many functions, xanthan gum can be used as emulsifier, stabilizer, gel thickener, wetting agent, film forming agent, etc. Xanthan gum, also known as xanthan, Hansen gum, xanthan polysaccharide, is a kind of single spore polysaccharide produced by the fermentation of Pseudoxanthomonas spp. ![]() Sodium Carboxymethyl Cellulose (CMC) H6.Sodium Carboxymethyl Cellulose (CMC) H9. ![]()
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