Solid-State Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt.
Polymers and Pigments Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt.
Carbohydr Polym. 2019 Jul 15;216:54-62. doi: 10.1016/j.carbpol.2019.03.038. Epub 2019 Mar 30.
Biodegradable, antimicrobial, and semiconducting cellulosic composite was synthesized by in-situ polymerization of polyaniline in the presence of cellulose. The cobalt ferrite nanoparticles (CFO-NPs) were added during the polymerization process to acquire this composite magnetic property. The CFO-NPs were prepared by sol-gel method with average particles size less than 50 nm. The nanocomposites were characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). In addition, their magnetic, dielectric constant, dielectric loss, and conductivity behaviors were studied. The magnetization (M) and conductivity increased up to 3.7 emu/g and 3.5 × 10 S/cm, respectively, with increasing CFO-NPs content. The prepared electromagnetic nanocomposite exhibits highly efficient biodegradability and antimicrobial activity against Escherichia coli, Bacillus subtilis, and Candida albicans. The antimicrobial activity increased with increasing CFO-NPs while the biodegradability decreased.
通过在纤维素存在的情况下原位聚合聚苯胺合成了可生物降解、抗菌和半导体纤维素复合材料。在聚合过程中添加了钴铁氧体纳米粒子 (CFO-NPs) 以获得这种复合磁性。CFO-NPs 采用溶胶-凝胶法制备，平均粒径小于 50nm。通过傅里叶变换红外光谱 (FT-IR)、扫描电子显微镜 (SEM) 和能谱 (EDX) 对纳米复合材料进行了表征。此外，还研究了它们的磁、介电常数、介电损耗和电导率特性。随着 CFO-NPs 含量的增加，磁化 (M) 和电导率分别增加到 3.7 emu/g 和 3.5×10 S/cm。所制备的电磁纳米复合材料表现出高效的生物降解性和对大肠杆菌、枯草芽孢杆菌和白色念珠菌的抗菌活性。随着 CFO-NPs 的增加，抗菌活性增加，而生物降解性降低。
