Extraction of cellulose from paulownia plants and its simple ester carboxymethyl cellulose (na-kms) technology
Abstract
In this experiment, Paulownia fiber plant is ground to 0.5-1 cm. In order to determine the optimum alkali solution concentration to extract cellulose from the raw material, the optimum degree of polymerization was determined by boiling in 25, 35, 50, 55 g/l solution. It can be seen from the table that certain properties of cellulose produced under the influence of different concentrations of alkali have different indicators. At alkaline concentration of 50 g/l, the cellulose yield was 49.6%, α-cellulose 89.5%, and the degree of polymerization was known in 1100 experiments. Ash content was a positive indicator of 1.78%. The scientific essence is that the cellulose is first soaked in isopropyl alcohol and mercerized in caustic alkali (NaOH) solution. Then, the alkylation process is carried out by adding a certain amount of monochloroacetic acid to the alkaline cellulose. Then, the alkylation process is carried out by adding a certain amount of monochloroacetic acid to the alkaline cellulose. The resulting carboxymethylcellulose is sent for purification. Na-CMC with 38-40% moisture content is washed in 53% ethyl alcohol and dried.