Preparation and multifunctional application of meso‐chitosan for the woolen process

Abstract

This study used chitosan deacetylated to different degrees to process woolen fabrics via the nanometrization of sodium hydroxide of different concentrations. The analysis and determination of the bacterial resistance, shrink resistance, Fourier transform infrared, and dyeability were then carried out for the processed substances. The particle diameter was measured with light scattering and scanning electron microscopy. It was then reduced with 5% and higher concentrations of NaOH, in which the particle diameter was 150-750 nm. As for bacterial resistance, the processed cloth that was not oxidized by H 2 O 2 had better bactericidal and bacteriostatic effects than the cloth that underwent the oxidation process. Chitosan and meso-chitosan had a bacterial-resistance effect on the woolen fabrics. The processed cloth also had a better shrinkresistance rate, but the effect of nanometrization was not obvious. For the dyeability of the woolen fabrics, mesochitosan was better than chitosan. The higher degree of deacetylation of chitosan slightly improved the dyeability. The dyeability increased a little as the temperature of the curing treatment rose and the time of the curing treatment was extended.

Layer‐by‐layer deposition of antimicrobial polymers on cellulosic fibers: a new strategy to develop bioactive textiles

“…In this study, it was used CH of low molecular weight (420 kDa). CH is a cation that attracts the negative charges of the cell walls of bacteria, as claimed by several authors, being the cause for CH antibacterial action . The surface of S .…”

“…CH is a cation that attracts the negative charges of the cell walls of bacteria, as claimed by several authors, being the cause for CH antibacterial action. [31][32][33][34] The surface of S. aureus includes the negatively charged teichoic acid within a thick peptidoglycan layer that lacks an outer membrane. [35] This should render the bacterial cell more attractive to and easier to be damaged through electrostatic-mediated contact-inhibition mechanisms when exposed to the positively charged CH layer (CT5 and CT9) than the negatively charged ALG layer (CT6 and CT10).…”

New biomaterial based on cotton with incorporated Biomolecules

“…This fact may be explained by the number of amine groups available for reaction. CH is a cation that will attract the negative charges of the cell walls of bacteria and cause damage and sometimes even death …”

“…CH is a cation that will attract the negative charges of the cell walls of bacteria and cause damage and sometimes even death. [61][62][63][64] The sample 20 control presented lower values of bacteriostatic activity (1.8 for S. aureus and 1.2 for K. pneumonia) with respect to sample 20. These values were due to the layers of CH and ALG, which had antibacterial properties, but otherwise, there was no L-cys in this sample.…”