Can HPMC and CMC mix
Methyl cellulose is white or white like fibrous or granular powder; Odorless, tasteless. This product in water swelling into a clear or slightly turbid colloidal solution; Insoluble in absolute ethanol, chloroform or diethyl ether. It is rapidly dispersed and swollen in hot water at 80-90 ℃, and rapidly dissolved after cooling. The aqueous solution is quite stable at room temperature, and can gel at high temperature, and the gel can change with the solution with the temperature.
It has excellent wettability, dispersion, adhesion, thickening, emulsification, water retention and film formation, as well as oil impermeability. The film has excellent toughness, flexibility and transparency. Because it is non-ionic, it can be compatible with other emulsifiers, but it is easy to salt out, and the solution is stable in the range of PH2 — 12. Sodium carboxymethyl cellulose This product is the sodium salt of cellulose carboxymethyl ether, belongs to anionic cellulose ether, is white or milky white fibrous powder or particle, density 0.5-0.7 g/cubic centimeter, almost odorless, tasteless, hygroscopic. Easy to disperse in water into transparent gelatinous solution, insoluble in ethanol and other organic solvents.
When the pH of the aqueous solution is 6.5 — 8.5, the viscosity of the slurry decreases significantly when the pH is >10 or <5, and the performance is the best when the pH is 7. For thermal stability, the viscosity rises rapidly below 20℃, changes slowly at 45℃, and the colloid denaturation and viscosity and properties decrease significantly when heated for a long time above 80℃. Easily soluble in water, transparent solution; It is very stable in alkaline solution, and easy to hydrolyze in the case of acid. When the pH value is 2-3, precipitation will occur, and precipitation will also occur in the case of multivalent metal salts. Hydroxypropyl methyl cellulose, also known as hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, is the selection of highly pure cotton cellulose as raw material, under alkaline conditions by special etherification and preparation.
Soluble in water and most polar C and appropriate proportion of ethanol/water, propanol/water, dichloroethane, etc., insoluble in diethyl ether, acetone, absolute ethanol, swelling in cold water into a clear or slightly turbidized colloidal solution. The aqueous solution has surface activity, high transparency and stable performance. HPMC has the property of hot gel. After heating, the product aqueous solution forms gel precipitation, and then dissolves after cooling. The gel temperature of different specifications is different.
Post time: Sep-09-2022