Antimicrobial finishing of cotton fabric by atmospheric pressure plasma

Abstract

In order to synthesize the antimicrobial cotton fabrics, two antimicrobial agents, 3-chloro-2-hydroxypropyltrimethyl ammonium chloride (TX-DF) and 3-(acrylamidopropyl) trimethylammonium chloride (APTAC), were grafted onto cotton fabrics by atmospheric pressure plasma treatment. Orthogonal array testing strategy (OATS) was applied to investigate the optimum treatment conditions of the atmospheric pressure plasma, including sputter-gas species, gas pressure, treatment power and time. The obtained cotton fabrics were characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and energy dispersive X-ray (EDS). And the results revealed the successful grafting of two antimicrobial agents on cotton fabrics. The antimicrobial efficiency of the plasma treated cotton fabric were studied and found that the TX-DF-treated cotton fabric inactivated 99.85% S. aureus and 99.07% E. coli O157:H7 in 30 min contact time. The cotton sample grafted with APTAC inactivated 74.6% S. aureus and 92.3% E. coli O157:H7 in 30 min. The hand feeling of the plasma treated antimicrobial cotton fabrics ware measured by PhabrOmeter system, and the result showed that the plasma treatment has little effect on hand value. Thus, the antimicrobial property of cotton fabric finished with TX-DF by the argon/oxygen-plasma techniques achieved sound effects.

Construction of silicone with quaternized hydantoin‐based N‐chloramines on cotton with aid of supercritical interpenetration for antibacterial synergism

“…As shown in the spectrum of quaternization product (Figure 2c), the N‐alkylation causes the disappearance of the peaks related to tertiary amine originally at 2875 and 2785 cm −1 in the spectrum of esterification product. Instead, a new peak emerges at 801 cm −1 that represents −N + (CH 3 ) 3 50 . The spectrum of quaternization product also shows stretching vibrations of OH (overlapped with amide NH), imide NH, imide CO, and amide CO at 3374, 3066, 1767, and 1721 cm −1 , respectively.…”

“…Instead, a new peak emerges at 801 cm À1 that represents ÀN + (CH 3 ) 3 . 50 The spectrum of quaternization product also shows stretching vibrations of O H (overlapped with amide N H), imide N H, imide C O, and amide C O at 3374, 3066, 1767, and 1721 cm À1 , respectively. The O H of the quaternization product is then alcoholyzed with Si H (stretching and bending vibrations at 2167 and 838 cm À1 , respectively, as shown in Figure 1e) of poly(methylhydrosiloxane) to produce silicone with only quaternary ammonium salt.…”