Optimization of application procedure for fixation of monocationic salt onto cotton with antibacterial activity

Abstract

A novel application procedure for imparting antibacterial properties onto cotton is described. The modified cotton was obtained by polymerization of glycidyl methacrylate (GMA) with 1,4-diazabicyclo(2,2,2)octane monocationic salt (MS) derivative in the presence of the free radical initiators sodium bisulfite and potassium persulfate. Out of the four application protocols tested, use of an exhaustion procedure to fix MS onto cotton gave optimal results. Dyeing of the modified cotton with C.I. Direct Blue 225 did not require salt, thereby indirectly confirming fixation of the cationic MS. Antibacterial activity was completely retained after three washing cycles when tested with Klebsiella pneumoniae but to a lesser extent against Staphylococcus aureus. The mechanical properties of the modified cotton were unaltered.

Environmentally Friendly Antibacterial Cotton Textiles Finished with Siloxane Sulfopropylbetaine

“…In addition, Soares and co-workers prepared a antibacterial cotton by polymerization of glycidyl methacrylate (GMA) with 1,4-diazabicyclo(2,2,2) octane monocationic salt (MS) derivative in the presence of free radical initiators sodium bisulfite and potassium persulfate. They found that the tensile strength was reduced from about 300 to 265 N in the warp direction (decreased by about 12%) and reduced slightly in the weft direction . In the present work, it is noted that the breaking strength of cotton textile finished with SSPB is improved significantly from about 265N to 322N in the weft direction and from about 586N to 652N in the warp direction as shown in Figure a, i.e., the breaking strength of cotton textile finished with SSPBs is increased by about 21.5% in the weft direction and about 11.3% in the warp direction.…”

“…They found that the tensile strength was reduced from about 300 to 265 N in the warp direction (decreased by about 12%) and reduced slightly in the weft direction. 35 In the present work, it is noted that the breaking strength of cotton textile finished with SSPB is improved significantly from about 265N to 322N in the weft direction and from about 586N to 652N in the warp direction as shown in Figure 6a, i.e., the breaking strength of cotton textile finished with SSPBs is increased by about 21.5% in the weft direction and about 11.3% in the warp direction. At the same time, it is found in Figure 6b that the maximum breaking elongation is reduced slightly from about 68 to 64% in the weft direction (decreased by 5.9%) while it is improved from about 32.9 to 37.7% in the warp direction (increased by 14.5%).…”

“…The SSPB finishing process of cotton textile is carried out in the aqueous medium. It is proposed that the SSPB finishing process of cotton textile is an environmentally compatible process having the potential for scaling up manufacturing of antibacterial textiles …”

“…The mechanical properties of the cotton textiles finished with SSPB and the raw cotton textiles were evaluated using a universal testing machine according to the standard test method of ISO 9073 part 3 (Strip Method). 35 All the tensile tests were carried out under the standard atmosphere with a temperature of 20 ( 2 °C and a relative humidity of 65 ( 2%. Five specimens (5 cm wide and 15 cm long) were cut and tested at a constant cross-speed of approximately 100 mm/min.…”

Factors Affecting the Functional- and Comfort-related Properties of Reactive Dyed Cotton Knits

“…Increasing the antibacterial agent concentration brings about a significant improvement in antibacterial functionality/activity, expressed as a zone of inhibition (ZI), the magnitude of the increase being determined by the level, i.e., the higher the level of antibacterial agent, the better the antibacterial efficiency against both the G Àve and G þve bacteria. There is also an effect of yarn count, i.e., Ne 20/1 > Ne 24/1 > Ne 30/1, and the kind of bacteria, i.e., G þve > G Àve, the latter most probably being due to the differences in the membrane structures of the two types of bacteria [8,17]. The differences in the antibacterial activity of fabrics from different yarn counts may be due to the greater modification of the fabric structure produced from the coarser Ne 20/1 yarn than of the fabric produced from the finer Ne 24/1 or Ne 30/1 yarn.…”