Department of Chemistry, State University of Maringa, Av. Colombo 5790, 87020-900, Zona 07, Maringá, PR, Brazil.
Technological Department Environmental Management, Federal Technological University of Parana, Campus Medianeira, Av. Brasil, Parque Independência, 85884-000 Medianeira, PR, Brazil.
Carbohydr Polym. 2015 Nov 20;133:277-83. doi: 10.1016/j.carbpol.2015.06.108. Epub 2015 Jul 9.
Silver nanoparticles (AgNPs) have attracted great attention due to its optical, electrical and thermal properties. Cellulosic supports for these nanoparticles are of particular interest because of its availability, flexibility and biocompatibility. In this work, AgNPs were synthesized using two cellulosic materials, cellophane (CP) and filter paper (FP), as matrix support. Cellulosic materials were immersed in an aqueous solution of silver nitrate containing polyvinylpyrrolidone (PVP) and then reduced with hydroxylamine. The obtained nanocomposites (CP-AgNPs and FP-AgNPs) were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (DRX) and scanning electron microscopy (SEM). AgNPs of near 15nm anchored onto cellulosic surfaces were detected. The thermal properties of these materials were investigated through thermogravimetry (TG). Their kinetic of thermal decomposition was studied by the Vyasovkin method of dynamic isoconvertion, which indicated a catalytic effect of AgNPs in the cellulose thermal decomposition reaction.
由于其光学、电学和热学特性，银纳米粒子（AgNPs）引起了极大的关注。这些纳米粒子的纤维素载体因其可用性、灵活性和生物相容性而受到特别关注。在这项工作中，使用两种纤维素材料，玻璃纸（CP）和滤纸（FP），作为基质支持来合成 AgNPs。将纤维素材料浸入含有聚乙烯吡咯烷酮（PVP）的硝酸银水溶液中，然后用羟胺还原。通过傅里叶变换红外光谱（FTIR）、X 射线衍射（DRX）和扫描电子显微镜（SEM）对所得纳米复合材料（CP-AgNPs 和 FP-AgNPs）进行了表征。检测到近 15nm 的 AgNPs 锚定在纤维素表面上。通过热重分析（TG）研究了这些材料的热性能。通过动态等转化率的 Vyasovkin 方法研究了它们的热分解动力学，表明 AgNPs 对纤维素热分解反应具有催化作用。
