Degradation of Cellulose Acetate-Based Materials: A Review

摘要: Cellulose acetate polymer is used to make a variety of consumer products including textiles, plastic films, and cigarette filters. A review degradation mechanisms, the possible approaches diminish environmental persistence these materials, will clarify current potential rates after disposal. Various studies have been conducted on biodegradability cellulose acetate, but no has compiled which includes biological, chemical, photo chemical mechanisms. prepared by acetylating cellulose, most abundant natural polymer. readily biodegraded organisms that utilize cellulase enzymes, due additional acetyl groups requires presence esterases for first step in biodegradation. Once partial deacetylation accomplished either or hydrolysis, polymer’s backbone biodegraded. chemically degraded UV wavelengths shorter than 280 nm, limited degradability sunlight lack chromophores absorbing ultraviolet light. Photo can be significantly enhanced addition titanium dioxide, as whitening agent many products. with TiO2 causes surface pitting, thus increasing material’s area enhances The combination both biodegradation allows synergy overall rate. physical design product also facilitate rate, since are highly influenced exposure conditions. patent literature contains an abundance ideas designing less persistent outdoors environment, this include insights into designs.