Department of Graphic Design and Engineering Projects, Bilbao Faculty of Engineering, University of the Basque Country (UPV/EHU), Bilbao, 48013, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain; Laboratory for Multifunctional Materials, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093, Zürich, Switzerland.
BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain.
Carbohydr Polym. 2020 May 15;236:116001. doi: 10.1016/j.carbpol.2020.116001. Epub 2020 Feb 13.
Free-standing mesoporous membranes based on cellulose nanocrystals (CNCs) are fabricated upon the incorporation of cobalt ferrite (CoFeO) and graphite nanoparticles at concentrations up to 20 wt % through a soft-templating process. Scanning electron microscopy (SEM) and N adsorption-desorption isotherms reveal the development of highly-porous interconnected random 3D structure with surface areas up to 193.9 m g. Thermogravimetric analysis (TGA) shows an enhanced thermal stability thanks to the formation of a tortuous network limiting the hindrance of degradation by-products. Vibrating sample magnetometer (VSM) reveals a maximum magnetization saturation of 8.77 emu·g with materials having either ferromagnetic or diamagnetic behaviour upon the incorporation of CoFeO and graphite, respectively. Four-point-probe measurements display a maximum electrical conductivity of 9.26 ± 0.04 S·m when graphite is incorporated into CNCs. A proof of concept for the applicability of synthesized nanohybrids for environmental remediation is provided, presenting the advantage of their easy recovery using external magnetic fields.
基于纤维素纳米晶体（CNC）的独立式介孔膜是通过软模板法制备的，在高达 20wt%的浓度下掺入了四氧化三钴（CoFeO）和石墨纳米粒子。扫描电子显微镜（SEM）和氮气吸附-脱附等温线表明，形成了具有高达 193.9m²/g 的高多孔互连的随机 3D 结构。热重分析（TGA）表明，由于形成了曲折的网络，限制了降解副产物的阻碍，从而提高了热稳定性。振动样品磁强计（VSM）显示，在掺入 CoFeO 和石墨后，材料分别具有铁磁性或抗磁性，最大磁化饱和值为 8.77 emu·g。四点探针测量显示，当石墨掺入 CNC 时，最大电导率为 9.26±0.04 S·m。提供了用于环境修复的合成纳米杂化物适用性的概念验证，展示了使用外部磁场易于回收的优势。
