Optimizing rechargeable antimicrobial performance of cotton fabric coated with 5,5-dimethylhydantoin (DMH)

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).…”

“…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 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.…”

“…Orthogonal array testing strategy (OATS) analysis was used for determining the optimum treatment conditions [25][26][27][28][29]. Four variables which have been used previously [25][26][27] were adopted, i.e., the concentration of DMH, curing temperature, concentration of the bleaching solution, and the duration of chlorination and their respective effects on antibacterial properties were investigated.…”

“…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). Further studies were conducted in order to optimize the treatment conditions for CD [25], CPD [26], and CWPD [27] but the optimum condition for the CDPD process has not been reported yet. Therefore, the optimum condition for the CDPD process is investigated in this study.…”