Effect of reactive dyes upon the uptake and antibacterial action of poly(hexamethylene biguanide) on cotton. Part 1: Effect of bis(monochlorotriazinyl) dyes

Abstract

Poly(hexamethylene biguanide) (PHMB) is of interest as a bactericide for fabrics. It has affinity for cotton by reaction with the cellulosic carboxylate groups. In this study, the capacity of undyed cotton to absorb PHMB has been determined and compared with cotton dyed with anionic bis(monochlorotriazinyl) reactive dyes. When cotton is dyed with these dyes the absorption of PHMB increases, the dye providing sulphonic acid sites with which the PHMB can react. The reacted PHMB and the percentage fixation of reactive dye were determined and from this the concentration of sulphonic acid on the dyed fibre. In the case of cotton dyed with Procion Yellow H‐E4R, the dye increased the absorption of PHMB to approximately 1.45 mequiv. of biguanide per sulphonic acid group. For Procion Red H‐E3B and Navy H‐ER the figures were 1.18 and 1.00, respectively.

Multifunctional Textiles – Modification by Plasma, Dyeing and Nanoparticles

“…Regarding their volume, nanoparticles have a high specific surface area. By decreasing the size of a particle, its surface distribution rate increases [87]. The quantity of adsorbed silver on untreated bleached/ mercerized cotton was 32 ppm when 30 nm silver nanoparticles were used and 13 ppm when 80 nm silver nanoparticles were used.…”

“…In the presence of moisture, silver cations react with hydroxyl functional cellulosic groups and are attached to each other electrostatically. The presence of a reactive dye on cotton and the introduction of additional covalently bound sulfonic acid groups will facilitate the uptake of a cationic antimicrobial agent [87]. Therefore, it is possible to conclude that RucoBac AGP is bound to the cotton surface through sulfonic groups of a covalently bound dye and through partially ionized hydroxyl and carboxyl groups present on the fiber [72].…”

An effective antimicrobial treatment for wool using polyhexamethylene biguanide as the biocide, Part 1: Biocide uptake and antimicrobial activity

“…PHMB [Fig. 1(A)] was reported to absorb UV light,10 probably because of the CN double bonds in the structure. We confirmed that PHMB absorbed UV with a single sharp peak at wavelength of 236 nm [Fig.…”

“…The interaction between PHMB and the PMS/sulfite‐treated wool surface is a matter of interest. Because of its cationic nature, PHMB attachment on cotton has been found to be predominantly due to ionic interaction with the carboxylic acid at low concentrations and hydrogen bonding at higher concentrations 9, 10. The dyeing of cotton fabrics with reactive dyes, which introduces additional anionic sulfonic groups in the fabric, further increases the uptake of PHMB 27.…”

“…Because of its cationic nature, PHMB attachment to cotton is believed to be predominantly through ionic and hydrogen bonding 9. The carboxyl groups on cotton fabrics that have originated from chemical finishing are involved in some of these interactions 10. Commercial antimicrobial cotton fabrics using PHMB are available under the trade name Purista 11.…”