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Eco-friendly and Durable Antibacterial Cotton Fabrics Prepared with Polysulfopropylbetaine
Li Zhou,Hongbo Wang,Jinmei Du,Jiajia Fu,Wencong Wang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.6
A novel antibacterial agent polysulfopropylbetaine (PSPB) bearing carboxyl groups was synthesized and its application on cotton fabric to provide durable antibacterial property was also presented. The successful synthesis of PSPB and its immobilization onto the cotton fabric surface were verified by a series of tests including FTIR, 1H NMR, XPS and SEM. Viable cell counting method was employed to investigate antibacterial properties of the finished cotton fabrics. It was found that the cotton fabrics treated with PSPB were endowed with desirable antibacterial activity against both gram-negative bacteria Esherichia coli (E.coli, AATCC 6538) and gram-positive bacteria Staphylococcus aureus (S.aureus, AATCC 25922), with the bacterisotatic rates of 99.69 % and 99.95 %, respectively. Notably, the bacterial reduction rates still maintained over 90 % against both bacteria even after 50 consecutive laundering cycles. Moreover, tests concerning the hydrophilicity, air permeability, water vapor transmission, mechanical properties as well as thermal properties were carried out systematically. The experimental results indicated the hydrophilic performance, air permeability and moisture penetrability of the cotton fabrics finished with PSPB were improved greatly in spite of a slight reduction in thermal performance and little obvious influence on mechanical performance. The antibacterial cotton fabric has the potential to be applied in sportswear, underwear, household textiles, medical fields and much more.
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Trichromatic Dyeing of Polyimide Fiber Using Its Inherent Color as a Yellow Component
Dongyan Shao,Changhai Xu,Jinmei Du,Hongbo Wang 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8
Polyimide (PI) fiber is one kind of high-performance fibers with outstanding thermal stability, mechanicalproperties, and chemical resistance, but it is difficult to be dyed due to its tightly packed macromolecules and lack offunctional groups for dyeing. Especially, the inherent yellow shade of PI fiber limits the color gamut that can be matched bytrichromatic dyeing. In this study, it is proposed to investigate the possibility to dye PI fibers into a black shade with dispersedyes and basic dyes with the assistance of swelling agents. The dyeing experiments showed that, among the proposedswelling agents, N-methyformanilide (MFA) was the preferred candidate for enhancing the dyeing ability of PI fibers. Usingthe inherent yellow color of PI fiber as a yellow component in trichromatic dyeing it could be dyed into a black shade withgood colorfastness to washing, rubbing, and dry-heating. In spite of causing a slight decrease in tensile strength the dyeingwould not impair the thermal stability of PI fibers.
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