Supercritical Phase Inversion: A Powerful Tool for Generating Cellulose Acetate-AgNO3 Antimicrobial Membranes

Materials

Ernesto Reverchon¹  Stefano Cardea¹  Lucia Baldino¹ 

[1] Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy;

关键词: cellulose acetate;    silver nitrate;    membranes;    supercritical phase inversion;    supercritical CO₂;   

DOI  :  10.3390/ma13071560

来源: DOAJ

【 摘 要 】

Antimicrobial composite membranes, formed by cellulose acetate loaded with AgNO₃ particles, were produced by supercritical phase inversion. Different cellulose acetate concentrations were tested (15%, 20%, 30%(w/w)), whereas the active agent (i.e., silver nitrate) concentration was fixed at 0.1%(w/w) with respect to the quantity of polymer used. To determine the influence of the process parameters on membranes morphology, the pressure and temperature were varied from 150 to 250 bar and from 55 to 35 °C, respectively. In all cases, regularly porous membranes were produced with a uniform AgNO₃ distribution in the membrane matrix. Silver release rate depended on membrane pore size, covering a time interval from 8 to 75 h.

【 授权许可】

Unknown