Ferrero Franco, Periolatto Monica
Politecnico di Torino, Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
J Nanosci Nanotechnol. 2012 Jun;12(6):4803-10. doi: 10.1166/jnn.2012.4902.
The purpose of this research work was to develop a textile finish based on the radical UV-curing of chitosan on textiles to confer antimicrobial properties. Chitosan is a biopolymer with unique properties such as biodegradability, non-toxicity, antimicrobial activity. In this work cotton or silk fabrics and synthetic filter fabrics were impregnated with an acid solution of chitosan added of the photoinitiator in the proper amount and cured at room temperature by exposure to UV lamp. Process conditions such as percentage add-on, dilution, chitosan-fabric contact time, irradiation time and power, were optimized. The antimicrobial activity of finished fabrics was tested according to ASTM E 2149-01 standard test performed with Escherichia Coli ATCC 8739. Moreover dyeing test with Turquoise Telon dye were carried out to evaluate the treatment homogeneity while the amino group content was determined by ninhydrin assay. Moreover on cotton and silk fabrics the treatment fastness to domestic laundering was tested, according to UNI EN ISO105-C01. Obtained results showed a strong antimicrobial activity conferred by the treatment, homogeneous on fabric surface. It is evident already at low add-on, without affecting the hand properties of natural fabrics and the filtration characteristics of the synthetic filter fabrics. Finally, washing fastness was better for samples prepared with a better penetration of chitosan inside the fibers.
本研究工作的目的是开发一种基于壳聚糖在纺织品上的自由基紫外线固化的织物整理剂，以赋予其抗菌性能。壳聚糖是一种具有生物可降解性、无毒、抗菌活性等独特性能的生物聚合物。在这项工作中，将棉或丝绸织物以及合成滤布用添加了适量光引发剂的壳聚糖酸溶液浸渍，并通过暴露于紫外灯下在室温下固化。对诸如增重百分比、稀释度、壳聚糖与织物的接触时间、辐照时间和功率等工艺条件进行了优化。根据用大肠杆菌ATCC 8739进行的ASTM E 2149-01标准测试，对整理后织物的抗菌活性进行了测试。此外，还进行了用绿松石特隆染料的染色试验，以评估处理的均匀性，同时通过茚三酮测定法测定氨基含量。此外，根据UNI EN ISO105-C01，对棉和丝绸织物进行了家庭洗涤处理牢度测试。所得结果表明，该处理赋予了很强的抗菌活性，在织物表面均匀分布。在低增重率时就很明显，且不影响天然织物的手感性能和合成滤布的过滤特性。最后，对于壳聚糖在纤维内部渗透较好的制备样品，洗涤牢度更好。
