Cellulose Based Film with Antimicrobial Activities
Raddad, Rafat Mohieddin Saleh
جامعة النجاح الوطنية
Cellulose is a widely available natural product and has unlimited number of industrial applications. Various functionalities could be added to the cellulose backbone each serves certain commercial application. In this work, cellulose extracted from olive industry solid waste was converted to cellulose dialdehyde by oxidation with sodium periodate then reacted with the two fatty amines N-methyl dodecylamine and dodecyl amine, to form cellulose fatty imine which then converted to cellulose fatty amine by reaction with NaBH(OAc)3 and sodium borohydride. The produced cellulose fatty amine showed plastic behavior. The structures of the prepared cellulose aldehyde, cellulose fatty amine were investigated by FT-IR and Scanning electronic microscope (SEM). Several solutions of both cellulose fatty amines and cellulose triacetate with various ratios were prepared and casted into films. The films morphologies were investigated by SEM, the SEM images showed excellent distribution of cellulose fatty amine and cellulose acetate with strong bonding. The produced films were clear and transparent. Various physical properties of the films such as tensile strength, Elongation, softening temperature (Tg) were evaluated. The results showed that the film could be suitable for food and drink warpin. Antimicrobial activity of the produced films were evaluated against three types of bacteria two gram negative and one gram positive. Both polymers showed excellent activities after 24 hr. against gram negative (klebsiella apneumonia, E. coli), the activity reached about 99 % and medium activity against the gram positive bacteria (staphylococcus). The ability of the film to absorb nitrite ions from water was studied but the film showed no efficiency toward nitrite ion.