Hydrophobic modified hydroxyethyl cellulose and preparation method thereof

The invention discloses hydrophobically modified hydroxyethyl cellulose and a preparation method thereof, and belongs to the field of polymer chemistry. The preparation method of the hydrophobically modified hydroxyethyl cellulose comprises the following steps: a, mixing sodium hydroxide with a mixed solvent, fully alkalifying, and cooling; b, mixing the solution treated in the step a with refined cotton powder, and alkalizing under the protection of inert gas; c, adding a hydrophobic modifier into the solution treated in the step b, carrying out hydrophobic modification reaction, and cooling; and d, adding ethylene oxide into the solution treated in the step c, carrying out etherification reaction, cooling to obtain a crude product, neutralizing, separating, washing and drying the crude product to obtain the hydrophobic modified hydroxyethyl cellulose. According to the technical scheme, the hydrophobic modified hydroxyethyl cellulose with unique properties of both hydroxyethyl cellulose and a hydrophobic ass