Pérez-Alvarez Marissa, Cadenas-Pliego Gregorio, Pérez-Camacho Odilia, Comparán-Padilla Víctor E, Cabello-Alvarado Christian J, Saucedo-Salazar Esmeralda
Centro de Investigación en Química Aplicada, Departamento de Síntesis de Polímeros, Saltillo 25294, Coahuila, Mexico.
CONACYT-Centro de Investigación y de Innovación del Estado de Tlaxcala, Tlaxcala 90000, Mexico.
Polymers (Basel). 2021 Jun 8;13(12):1906. doi: 10.3390/polym13121906.
Copper nanoparticles (CuNP) were obtained by a green synthesis method using cotton textile fibers and water as solvent, avoiding the use of toxic reducing agents. The new synthesis method is environmentally friendly, inexpensive, and can be implemented on a larger scale. This method showed the cellulose capacity as a reducing and stabilizing agent for synthetizing Cellulose-Copper nanoparticles (CCuNP). Nanocomposites based on CCuNP were characterized by XRD, TGA, FTIR and DSC. Functional groups present in the CCuNP were identified by FTIR analysis, and XRD patterns disclosed that nanoparticles correspond to pure metallic Cu°, and their sizes are at a range of 13-35 nm. Results demonstrated that CuNPs produced by the new method were homogeneously distributed on the entire surface of the textile fiber, obtaining CCuNP nanocomposites with different copper wt%. Thus, CuNPs obtained by this method are very stable to oxidation and can be stored for months. Characterization studies disclose that the cellulose crystallinity index (CI) is modified in relation to the reaction conditions, and its chemical structure is destroyed when nanocomposites with high copper contents are synthesized. The formation of CuO nanoparticles was confirmed as a by-product, through UV spectroscopy, in the absorbance range of 300-350 nm.
采用绿色合成方法，以棉纺织纤维和水为溶剂制备了铜纳米颗粒（CuNP），避免使用有毒还原剂。这种新的合成方法环保、廉价且可大规模实施。该方法表明纤维素具有作为还原剂和稳定剂来合成纤维素 - 铜纳米颗粒（CCuNP）的能力。基于CCuNP的纳米复合材料通过X射线衍射（XRD）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）和差示扫描量热法（DSC）进行了表征。通过FTIR分析确定了CCuNP中存在的官能团，XRD图谱表明纳米颗粒对应于纯金属Cu°，其尺寸在13 - 35纳米范围内。结果表明，新方法制备的CuNP均匀分布在纺织纤维的整个表面，得到了具有不同铜重量百分比的CCuNP纳米复合材料。因此，通过该方法获得的CuNP对氧化非常稳定，可储存数月。表征研究表明，纤维素结晶度指数（CI）会根据反应条件发生变化，在合成高铜含量的纳米复合材料时其化学结构会被破坏。通过紫外光谱在300 - 350纳米的吸光度范围内证实了副产物CuO纳米颗粒的形成。
