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What are cellulose ethers?
Release Time:
2021-09-15
Cellulose ether is a polymer compound with ether structure made of cellulose. Each glucosyl ring in the cellulose macromolecule contains three hydroxyl groups, the primary hydroxyl group on the sixth carbon atom, the secondary hydroxyl group on the second and third carbon atoms, and the hydrogen in the hydroxyl group is replaced by a hydrocarbon group to generate cellulose ether derivatives.
Cellulose ether is a polymer compound with ether structure made of cellulose. Each glucosyl ring in the cellulose macromolecule contains three hydroxyl groups, the primary hydroxyl group on the sixth carbon atom, the secondary hydroxyl group on the second and third carbon atoms, and the hydrogen in the hydroxyl group is replaced by a hydrocarbon group to generate cellulose ether derivatives. thing. It is a product in which the hydrogen of the hydroxyl group in the cellulose polymer is replaced by a hydrocarbon group. Cellulose is a polyhydroxy polymer compound that neither dissolves nor melts. After etherification, cellulose can be dissolved in water, dilute alkali solution and organic solvent, and has thermoplasticity.
The solubility of cellulose after etherification changes significantly, and it can be dissolved in water, dilute acid, dilute alkali or organic solvent. The solubility mainly depends on three factors: (1) The characteristics of the groups introduced in the etherification process, the introduction of The larger the group is, the lower the solubility, the stronger the polarity of the introduced group, and the more soluble the cellulose ether is in water; (2) The degree of substitution and the distribution of etherified groups in macromolecules. Most cellulose ethers can only be dissolved in water under a certain degree of substitution, and the degree of substitution is between 0 and 3; (3) the degree of polymerization of cellulose ether, the higher the degree of polymerization, the less soluble; The lower the water-soluble substitution degree, the wider the range. There are many kinds of cellulose ethers with excellent performance, which are widely used in industries such as construction, cement, petroleum, food, textile, detergent, paint, medicine, papermaking and electronic components.
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