Glažar Dominika, Štular Danaja, Jerman Ivan, Simončič Barbara, Tomšič Brigita
Department of Textiles, Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia.
National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia.
Nanomaterials (Basel). 2024 Dec 25;15(1):10. doi: 10.3390/nano15010010.
A smart viscose fabric with temperature and pH responsiveness and proactive antibacterial and UV protection was developed. PNCS (poly-(N-isopropylakrylamide)/chitosan) hydrogel was used as the carrier of silver nanoparticles (Ag NPs), synthesised in an environmentally friendly manner using AgNO and a sumac leaf extract. PNCS hydrogel and Ag NPs were applied to the viscose fabric by either in situ synthesis of Ag NPs on the surface of viscose fibres previously modified with PNCS hydrogel, or by the direct immobilisation of Ag NPs by the dehydration/hydration of the PNCS hydrogel with the nanodispersion of Ag NPs in the sumac leaf extract and subsequent application to the viscose fibres. Compared to the pre-functionalised PNCS application method, the in situ functionalisation imparted much higher concentration of Ag NPs on the fibres, colouring the samples brown to brown-green. These samples showed more than 90% reduction in the test bacteria and and provided excellent UV protection. In this case, the PNCS hydrogel acted as a reservoir for Ag NPs, whose release was based on a diffusion-controlled mechanism. Despite the Ag NPs decreasing the responsiveness of the PNCS hydrogel, the moisture management was still preserved in the modified samples. Accordingly, the PNCS hydrogel is a suitable carrier for biosynthesized Ag NPs to tailor the protective smart surface of viscose fibres.
开发了一种具有温度和pH响应性以及主动抗菌和紫外线防护功能的智能粘胶织物。PNCS（聚（N-异丙基丙烯酰胺）/壳聚糖）水凝胶被用作银纳米颗粒（Ag NPs）的载体，采用硝酸银和漆树叶提取物以环境友好的方式合成。PNCS水凝胶和Ag NPs通过以下两种方法应用于粘胶织物：一是在预先用PNCS水凝胶改性的粘胶纤维表面原位合成Ag NPs；二是通过PNCS水凝胶与漆树叶提取物中Ag NPs纳米分散体的脱水/水合作用直接固定Ag NPs，随后应用于粘胶纤维。与预功能化的PNCS应用方法相比，原位功能化使纤维上的Ag NPs浓度高得多，使样品呈现棕色至棕绿色。这些样品对测试细菌和的减少率超过90%，并提供了出色的紫外线防护。在这种情况下，PNCS水凝胶充当了Ag NPs的储存库，其释放基于扩散控制机制。尽管Ag NPs降低了PNCS水凝胶的响应性，但改性样品中的水分管理仍得以保留。因此，PNCS水凝胶是生物合成Ag NPs的合适载体，可用于定制粘胶纤维的保护性智能表面。
