Preparation and Application of a Xylan-Based Antibacterial Additive Agent against <em>Escherichia Coli </em>Bacteria

Abstract

In this work, a xylan-based antimicrobial additive agent was prepared and aimed for uses in paper products against Escherichia coli bacteria. The derived Cationic-Xylan-grafted-PHGH (CX-g-PHGH) was successfully synthesized by graft copolymerization of cationic-xylan with guanidine polymer (PHGH) using ceric ammonium nitrate as initiator. The obtained CX-g-PHGH had maximum PHGH grafting ratio of 18.45% and efficiency of 58.45%, and showed good viscosity and thermal stability. Furthermore, the paper samples prepared in this work were reinforced obviously with the addition of CX-g-PHGH by improved mechanical properties. Compared to the reference paper without any of the xylan-derivatives, the index of tensile, tear, burst and folding endurance of the paper had increases up to 20.07%, 25.31%, 30.20% and 77.78%, respectively. Moreover, the prepared CX-g-PHGH paper exhibited an efficient antimicrobial activity against E. coli bacterial, by which a lot of applications based on the new xylan-derived additive agent obtained in this work could be found, especially in field of antimicrobial paper products against E. Coli bacteria from contaminated food.

Xylooligosaccharides produced from sugarcane leaf arabinoxylan using xylanase from Aureobasidium pullulans NRRL 58523 and its prebiotic activity toward Lactobacillus spp.

“…The viscous behavior of the xylan depended on the plant biomass type, molecular weight and structure [ 72 ]. The xylan viscosity of 11.33 mPa s (shear rate of 100 s −1 , spindle speed at 50 rpm) fell in a moderate range, similar to the viscosity of xylan from wheat, cotton and sugarcane bagasse (6.00–20.00 mPa s) [ 37 , 71 , 73 ]. However, the SLX viscosity was lower than that of xylan with a similar structure, such as sugarcane bagasse xylan.…”

“…However, the viscosity was quite stable at speeds ranging from 50 (11.33 mPa s) to 100 rpm (10.33 mPa s). With regard to SLX viscosity, the xylan was exhibited as a pseudoplastic whereby increasing the spindle speed or shear rate force damages the network structure of xylan and its derivatives to reduce the viscosity [ 71 ]. The viscous behavior of the xylan depended on the plant biomass type, molecular weight and structure [ 72 ].…”

“…Heavily branched xylans reportedly had lower viscosity than linear or sparsely branched ones [ 74 ]. The SLX viscosity reported here showed potential for certain applications, including the improvement of paper strength [ 71 , 73 ].

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