Plasma-enhanced regenerable 5,5-dimethylhydantoin (DMH) antibacterial finishing for cotton fabric

Regenerable Antibacterial Cotton Fabric by Plasma Treatment with Dimethylhydantoin: Antibacterial Activity against S. aureus

“…The DMH padded cotton fabric was then dried at 80 °C for 5 min, similar to previous studies [24][25][26][27]. The dried fabric was then treated with plasma and cured at 120 °C, 140 °C, or 160 °C for 5 min (i.e., pad-dry-plasma-cure).…”

“…In the APP treatment system, the plasma jet was placed vertically above the fabric (Figure 2) [23][24][25][26][27]. As described in detail previously [23][24][25][26][27], helium (flow rate = 9.6 L/min) and nitrogen (flow rate = 0.15 L/min) were used as the carrier gas and reactive gas, respectively. The APP discharge power was 80 W, the jet distance was 5 mm, and the movement speed of the fabric was 0.2 m/s.…”

“…Non-ionic detergent, Diadavin EWN-T 200% (Tanatex, Leverkusen, Germany) (2%), was used for cleaning the fabric at pH 7 at 50 • C for 30 min. After cleaning, the fabric was rinsed with deionised water to remove detergent, oil, and impurities and dried at 80 • C for 20 min [23][24][25][26][27]. The cleaned fabric was then conditioned at 65% ± 2% relative humidity and 20 ± 2 • C for at least 24 h prior to further use.…”

“…In addition, the chemical structure of DMH is simple and the reagent itself is inexpensive and easily available. In our preliminary study [24], we found that plasma treatment can improve the pad-dry-cure process for introducing DMH to cotton fabric to achieve good antibacterial effects. The plasma process can be carried out at different stages of the pad-dry-cure process, i.e., plasma-pad-dry-cure (CPD); pad-plasma-dry-cure (CWPD), and pad-dry-plasma-cure (CDPD) [24], in order to make cotton fabric with antibacterial properties [24].…”

“…In our preliminary study [24], we found that plasma treatment can improve the pad-dry-cure process for introducing DMH to cotton fabric to achieve good antibacterial effects. The plasma process can be carried out at different stages of the pad-dry-cure process, i.e., plasma-pad-dry-cure (CPD); pad-plasma-dry-cure (CWPD), and pad-dry-plasma-cure (CDPD) [24], in order to make cotton fabric with antibacterial properties [24]. Experimental results reveal that CDPD treatment can provide the best antibacterial effect against S. aureus compared with CPD, CWPD, and even the "pad-dry-cure" process without plasma treatment (CD).…”