Engineering Department-UniFOA. Av. Paulo Erlei Alves Abrantes, Volta Redonda/RJ, Brazil.
Carbohydr Res. 2010 Sep 3;345(13):1865-71. doi: 10.1016/j.carres.2010.05.011. Epub 2010 May 19.
Surface modification of natural fibers has been made using different methods. In this paper, cellulose fibers from sugarcane bagasse were bleached and modified by zirconium oxychloride in situ. The chemically modified cellulose fibers were compared to those of bleached ones. Cellulose fibers were modified with ZrO(2).nH(2)O nanoparticles through the use of zirconium oxychloride in acidic medium in the presence of cellulose fibers using urea as the precipitating agent. The spatial distribution characterization of hydrous zirconium oxide on cellulose fibers was carried out by combining both processing and image analyses obtained by SEM and statistical methodologies. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TG) were also used to characterize the nanocomposite. Results indicated that ZrO(2).nH(2)O nanoparticles of about 30-80nm diameter deposited on cellulose fibers were heterogeneously dispersed.
已经使用不同的方法对天然纤维进行了表面改性。本文采用原位法用氧氯化锆对甘蔗渣纤维素纤维进行了漂白和改性。将化学改性后的纤维素纤维与漂白纤维进行了比较。在酸性介质中使用氧氯化锆，以尿素作为沉淀剂，在纤维素纤维存在的情况下，将 ZrO(2).nH(2)O 纳米粒子改性到纤维素纤维上。通过结合 SEM 和统计方法获得的加工和图像分析，对纤维素纤维上的水合氧化锆的空间分布特征进行了研究。还使用扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 和热重分析 (TG) 对纳米复合材料进行了表征。结果表明，直径约为 30-80nm 的 ZrO(2).nH(2)O 纳米粒子不均匀地分散在纤维素纤维上。
