Fe3O4@rGO hybrids intercalated nanocellulose-based aerogels for enhanced ferromagnetic and mechanical properties

摘要

This work presented a new method for preparing cellulose nanofibril (CNF)/Fe3O4@rGO composite aerogels with enhanced magnetic and mechanical properties. The composite aerogels were obtained through compounding, gelling, washing, tert-butanol replacing, and freeze-drying. The structural characteristics of composite aerogels were investigated via scanning electron microscopy, Fourier transform infrared, and X-ray diffraction. Results showed that the composite aerogels had interconnected three-dimensional porous network microstructures, and the Fe3O4@rGO hybrids were uniformly dispersed in the aerogels. Moreover, the aerogels' magnetization and compression characteristics were also studied. Magnetic measurements indicated that composite aerogels had good magnetization characteristics with the saturation magnetization value of 6.75 emu/g. The uniaxial compression tests showed that the compression strength and Young's modulus of the composite aerogels were significantly improved by 32.33 and 118.56%, respectively, relative to those of CNF aerogels. The perfect combination of structure and performance may render the composite aerogels useful for commercial applications in the fields of environmental engineering, biomedical engineering, electronics, and energy. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48564.