Guanidine Derivatives Leverage the Antibacterial Performance of Bio-Based Polyamide PA56 Fibres

• Published in: Polymers Vol. 16; no. 19; p. 2707
• Main Authors: Wang, Lili, Zhou, Bobo, Du, Yuliu, Bai, Miao, Xu, Xiang, Guan, Yong, Liu, Xiucai
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 25-09-2024; MDPI
• Subjects: Acids; Analysis; antibacterial activities; Antiinfectives and antibacterials; Antimicrobial agents; bio-based PA56; Chemical processes; Color fastness; dyeing; Dyes; E coli; Environmental impact; Fibers; Fourier transforms; Guanidine; guanidine derivative; Identification and classification; Mechanical properties; Methods; Moisture absorption; Polyamide resins; Polyamides; Properties; Sulfur; Terpolymers; Textiles; China; Germany; guanidine derivative; antibacterial activities; bio-based PA56; dyeing
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym16192707

Bacterial damage has significantly impacted humanity, prompting the control of harmful microorganisms and infectious diseases. In this study, antibacterial bio-based PA56 fibres were prepared with high-speed spinning using ethylene-methyl acrylate-glycidyl methacrylate terpolymer (EMA) as the compatibiliser and polypentamethylene guanidine sulphate (PPGS) as the antibacterial agent. The effects of PPGS content on the properties of PA56 draw-textured yarns (DTYs) were investigated. The compatibility between PPGS and PA greatly improved with EMA incorporation. Compared with PA56 fibres, the elongation at break of the sample containing 2.0 wt% EMA and PPGS increased by 25.93%. The inhibition rates of the fibres with 1.0 wt% PPGS against
and
reached over 99.99%. Samples were easily coloured with dyes, exhibiting good colour fastness, regardless of the EMA content. However, the antibacterial performances of dyed DTYs decreased to varying degrees. the inhibition rates of samples of 0.5wt% addition of PPGS against
were reduced from 99.99% to 28.50% and 25.36% after dyeing with Acid Blue 80 and Dispersible Blue 2BLN, respectively. The EMA-modified fibres exhibited the best antibacterial activity after dyeing with neutral gray 2BL. These findings are expected to promote the wider use of biobased PA56 in practical applications that require antibacterial performance and to guide the dyeing process of antimicrobial fibres.