Abstract Polyamide (PA) fiber is the second largest synthetic fiber, and extensively applied in underwear, outerwear, sports/leisure wear and decorative fabrics. However, PA textiles have poor wearing comfort resulting from their inherent hydrophobicity, and do not possess antibacterial function which is vital for preventing bacterial infections. To address these issues, this study employed polylysine (PLL) biomolecule to fabricate the hydrophilic and antibacterial surface on PA fabric by a dip coating technique. The Schiff base reaction between the aldehyde groups of glutaraldehyde and the amino groups of PLL and PA fiber was utilized to increase washing resistance. The effects of the dip coating conditions of PLL on the hydrophilicity of PA fabric were studied by the wetting time of water droplet. The hydrophilicity imparted to PA fabric by PLL coating was further confirmed by water contact angle, moisture adsorption and capillary effect tests. The PLL coated fabric exhibited excellent hydrophilic and antibacterial properties with good washing durability. The functional surface of the PLL coated fabric was proved by scanning electron microscope, X-ray photoelectron spectroscopy, and charge effect. The present research suggests that PLL biomolecule can be used as a surface coating agent for simultaneously imparting hydrophilic and antibacterial functions to PA fiber.

中文翻译：

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聚赖氨酸生物分子包覆聚酰胺织物的亲水抗菌表面功能化

摘要 聚酰胺（PA）纤维是第二大合成纤维，广泛应用于内衣、外衣、运动/休闲装和装饰面料。然而，PA纺织品由于其固有的疏水性导致穿着舒适度较差，并且不具备对预防细菌感染至关重要的抗菌功能。为了解决这些问题，本研究采用聚赖氨酸 (PLL) 生物分子通过浸涂技术在 PA 织物上制造亲水和抗菌表面。利用戊二醛的醛基与PLL和PA纤维的氨基之间的席夫碱反应来增加耐洗性。通过水滴润湿时间研究了PLL浸涂条件对PA织物亲水性的影响。通过水接触角、吸湿和毛细管效应测试进一步证实了 PLL 涂层赋予 PA 织物的亲水性。PLL涂层织物表现出优异的亲水性和抗菌性，具有良好的耐洗性。通过扫描电子显微镜、X射线光电子能谱和电荷效应证明了PLL涂层织物的功能表面。目前的研究表明，PLL 生物分子可用作表面涂层剂，同时赋予 PA 纤维亲水和抗菌功能。通过扫描电子显微镜、X射线光电子能谱和电荷效应证明了PLL涂层织物的功能表面。目前的研究表明，PLL 生物分子可用作表面涂层剂，同时赋予 PA 纤维亲水和抗菌功能。通过扫描电子显微镜、X射线光电子能谱和电荷效应证明了PLL涂层织物的功能表面。目前的研究表明，PLL 生物分子可用作表面涂层剂，同时赋予 PA 纤维亲水和抗菌功能。