The chemical formula of cellulose acetate
In today's world, the chemical technology of Japanese essence, cellulose acetate, is widely used. To understand its properties and its use, one must not know its chemical formula.

Cellulose acetate is obtained by the esterification reaction of cellulose and acetic anhydride. The composition of its chemical formula is closely related to the structure of cellulose. Cellulose, polysaccharide, whose molecules are connected by glucose units via β-1,4-glycosidic bonds. When reacted with acetic anhydride, some or all of the hydroxyl groups are replaced by acetyl groups.

If expressed in the general formula, the chemical formula of cellulose acetate can be written as\ [C_ {6} H_ {7} O_ {2} (OH) _ {3 - x} (OOCCH_ {3}) _ {x}\], where\ (x\) is the degree of acetylation, and the value range is usually between\ (2.2\) and\ (2.8\). This change in value is related to many properties of cellulose acetate. For example, the higher the\ (x\) value, the higher the acetyl content, and the different changes in its solubility, film formation and water resistance.

When\ (x = 2.5\), the acetyl group distribution in its molecular structure is relatively balanced. At this time, cellulose acetate has good solubility in organic solvents and can be used to prepare various membrane materials. For example, microporous membranes for filtration can be used to separate particles of different particle sizes by virtue of their specific pore sizes. It has significant effects in the fields of chemical industry and medicine.

In-depth analysis of its chemical formula shows its reaction mechanism. Cellulose hydroxyl groups are nucleophilic, and acetic anhydride carbonyl carbon is electrophilic. When the two meet, through a series of reactions, the hydroxyl groups are converted into acetoxy groups, resulting in cellulose acetate. This chemical formula is not only the basis for studying its synthesis, but also the key to exploring its new uses and improving its properties. According to this formula, scholars can adjust the reaction conditions, change the degree of acetylation, and create cellulose acetate materials suitable for different scenarios, so as to meet the needs of the times and promote the progress of chemical industry.