University of Belgrade, "Vinča" Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia.
University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia.
Carbohydr Polym. 2017 Feb 20;158:77-84. doi: 10.1016/j.carbpol.2016.12.006. Epub 2016 Dec 5.
This study discusses the biodegradation behavior of cotton and cotton/PET fabrics impregnated with Ag/TiO nanoparticles in soil. Biodegradation behavior was evaluated by standard test method ASTM 5988-03 based on determination of percentage conversions of carbon content to CO as well as by soil burial test and enzymatic hydrolysis with cellulase where the extent of biodegradation was estimated by the calculation of fabric weight loss. The morphological and chemical changes of fibers during biodegradation process were analyzed by SEM and FTIR spectroscopy, respectively. The results obtained by all applied methods suggested that Ag/TiO nanoparticles hindered the biodegradation of investigated cotton and cotton/PET fabrics. Soil burial test indicated faster biodegradation of the impregnated blend compared to impregnated cotton fabric which is attributed to smaller amount of fabricated Ag nanoparticles on the blend proved by AAS measurement. Similar trend was established by enzymatic hydrolysis of cotton fibers. Severe damage of cotton fibers in both fabrics due to biodegradation process was confirmed by SEM. However, the cotton fiber damage occurred to a lesser extent in the samples that were impregnated with Ag/TiO nanoparticles. PET fibers remained intact which was also indicated by FTIR analysis.
本研究探讨了浸渍 Ag/TiO 纳米粒子的棉和棉/PET 织物在土壤中的生物降解行为。通过基于测定碳含量转化为 CO 的百分比的标准测试方法 ASTM 5988-03 、土壤掩埋试验和用纤维素酶进行的酶水解来评估生物降解行为，通过计算织物失重来估计生物降解的程度。通过 SEM 和 FTIR 光谱分别分析了纤维在生物降解过程中的形态和化学变化。所有应用方法的结果表明，Ag/TiO 纳米粒子阻碍了所研究的棉和棉/PET 织物的生物降解。土壤掩埋试验表明，与浸渍棉织物相比，浸渍共混物的生物降解速度更快，这归因于共混物上制造的 Ag 纳米粒子数量较少，这一点通过 AAS 测量得到了证实。在棉纤维的酶水解中也建立了类似的趋势。SEM 证实了两种织物中的棉纤维由于生物降解过程而严重受损。然而，在浸渍了 Ag/TiO 纳米粒子的样品中，棉纤维的损伤程度较小。FTIR 分析也表明，PET 纤维保持完整。
