cellulózacetát

Cellulózacetát is a thermoplastic polymer and a plasticizer. It is derived from cellulose, a natural polymer found in plant cell walls. The process of creating cellulózacetát involves acetylating cellulose with acetic anhydride. This modification makes the cellulose soluble in organic solvents and gives it properties suitable for various applications.

Historically, cellulózacetát was developed in the early 20th century as a safer alternative to highly flammable cellulose nitrate. It found widespread use as a film base for photography and cinema, replacing cellulose nitrate due to its reduced flammability and improved durability. This application was crucial for the development of the film industry.

Beyond film, cellulózacetát has been used in the manufacturing of textiles, known as acetate rayon, which offers a silky feel and drapes well. It is also employed in the production of cigarette filters, where its fibrous structure effectively traps tar and nicotine. Other uses include eyeglass frames, tools with insulated handles, and in some coatings and adhesives.

The properties of cellulózacetát can be adjusted by varying the degree of acetylation and the plasticizers used. It is known for its good clarity, toughness, and resistance to weathering. While it is biodegradable under specific conditions, its disposal can still pose environmental challenges. The production and use of cellulózacetát have seen shifts over time with the advent of newer materials and changing environmental regulations.