Infrared and fluorescence properties of reduced graphene oxide/regenerated cellulose composite fibers

To give cellulose fibers dual characteristics of warming and fluorescence, graphene oxide (GO) and fluorescent particles were simultaneously dispersed into the regenerated cellulose spinning solution through blending modification and post-reduction methods. After dry-jet wet spinning and reducing in hydrazine hydrate solution, the reduced graphene oxide (RGO)/regenerated composite fibers with different mass ratios of filler were completed. Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), fluorescence microscopy, and other methods were used to characterize the structure and morphology of fibers. Test results showed that the thermal stability and infrared emissivity increased gradually with the increase of GO. The crystallinity and strength of the composite fiber first increased and then decreased. This type of fiber also had luminescent properties after addition of fluorescent agent. However, when too much fluorescent agent was added, the thermal stability, infrared emissivity, crystallinity, and other properties mentioned above were affected to some extent. According to the comprehensive analysis, when the amount of GO added was 1 wt% and fluorescent added was 3 wt%, respectively, the luminescence characteristic and far-infrared emissivity of the fibers were remarkably improved.