Čorak Ivana, Tarbuk Anita, Flinčec Grgac Sandra, Dekanić Tihana
Department of Textile Chemistry and Ecology, University of Zagreb Faculty of Textile Technology, Prilaz baruna Filipovića 28a, HR-10000 Zagreb, Croatia.
Polymers (Basel). 2024 Sep 7;16(17):2532. doi: 10.3390/polym16172532.
This article investigates the activation of surface groups of poly(ethylene terephthalate) (PET) fibers in woven fabric by hydrolysis and their functionalization with chitosan. Two types of hydrolysis were performed-alkaline and enzymatic. The alkaline hydrolysis was performed in a more sustainable process at reduced temperature and time (80 °C, 10 min) with the addition of the cationic surfactant hexadecyltrimethylammonium chloride as an accelerator. The enzymatic hydrolysis was performed using Amano Lipase A from (2 g/L enzyme, 60 °C, 60 min, pH 9). The surface of the PET fabric was functionalized with the homogenized gel of biopolymer chitosan using a pad-dry-cure process. The durability of functionalization was tested after the first and tenth washing cycle of a modified industrial washing process according to ISO 15797:2017, in which the temperature was lowered from 75 °C to 50 °C, and ε-(phthalimido) peroxyhexanoic acid (PAP) was used as an environmentally friendly agent for chemical bleaching and disinfection. The influence of the above treatments was analyzed by weight loss, tensile properties, horizontal wicking, the FTIR-ATR technique, zeta potential measurement and SEM micrographs. The results indicate better hydrophilicity and effectiveness of both types of hydrolysis, but enzymatic hydrolysis is more environmentally friendly and favorable. In addition, alkaline hydrolysis led to a 20% reduction in tensile properties, while the action of the enzyme resulted in a change of only 2%. The presence of chitosan on polyester fibers after repeated washing was confirmed on both fabrics by zeta potential and SEM micrographs. However, functionalization with chitosan on the enzymatically bioactivated surface showed better durability after 10 washing cycles than the alkaline-hydrolyzed one. The antibacterial activity of such a bio-innovative modified PET fabric is kept after the first and tenth washing cycles. In addition, applied processes can be easily introduced to any textile factory.
本文研究了机织织物中聚对苯二甲酸乙二酯（PET）纤维表面基团的水解活化及其用壳聚糖进行的功能化处理。进行了两种类型的水解——碱水解和酶水解。碱水解在更可持续的过程中进行，在较低温度和时间（80°C，10分钟）下进行，并添加阳离子表面活性剂十六烷基三甲基氯化铵作为促进剂。酶水解使用来自 Amano Lipase A（2 g/L酶，60°C，60分钟，pH 9）进行。PET织物表面通过轧染焙烘工艺用生物聚合物壳聚糖的均质凝胶进行功能化处理。根据ISO 15797:2017，在改进的工业洗涤工艺的第一次和第十次洗涤循环后测试功能化的耐久性，其中温度从75°C降至50°C，并且ε-(邻苯二甲酰亚胺基)过氧己酸（PAP）用作化学漂白和消毒的环保剂。通过失重、拉伸性能、水平芯吸、傅里叶变换红外衰减全反射（FTIR-ATR）技术、zeta电位测量和扫描电子显微镜（SEM）照片分析上述处理的影响。结果表明两种类型的水解都具有更好的亲水性和有效性，但酶水解更环保且更有利。此外，碱水解导致拉伸性能降低20%，而酶的作用仅导致2%的变化。通过zeta电位和SEM照片在两种织物上都证实了重复洗涤后聚酯纤维上壳聚糖的存在。然而，在酶促生物活化表面上用壳聚糖进行功能化处理在10次洗涤循环后比碱水解的表面显示出更好的耐久性。这种生物创新改性PET织物的抗菌活性在第一次和第十次洗涤循环后得以保持。此外，所应用的工艺可以很容易地引入任何纺织厂。
