The main objective in this study was to evaluate the possibility for the polyelectrolyte multilayer (PEM) assembly, selecting the cationic starch (CS) and anionic starch (AS) to increase the amount adsorption of cationic starch leading to modifying the bonding ability between recycled fibers. Experiments were conducted at neutral pH and 750 rpm stirring rate in Dynamic Drainage Jar (DDJ) for 10-minute deposition time to build 1 to 8 consecutive layers. The results have shown that CS/AS multilayers formation had significant influence on bonding ability between fibers. Tensile index increased from 15.62 N.m/g to 33.51 N.m/g at 5-layer assembly. Internal bonding between fibers showed a remarkable increase from 21.22 J/m2 to 74.08 J/m2 as well. Moreover, the most level of strength was obtained when cationic starch was the outermost layer. SEM images indicated that PEM formation makes the fiber surface rather rougher due to increase in adsorption that was not found in sheets made out of untreated fibers.
کلید واژگان :Recycled Fibers - Polyelectrolyte Multilayers – Layer-by-Layer Technique – Cationic Starch –Anionic Starch –Paper strength
ارزش ریالی : 300000 ریال
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