Abstract
The major challenge in preparing polymer nanocomposites is to prevent the agglomeration of inorganic nanoparticles (NPs). Here, with regenerated cellulose (RC) films as supporting medium, UV-shielding and transparent nanocomposite films with hydrophobicity were fabricated by in situ synthesis of CeO2 NPs. Facilitated through the interaction between organic and inorganic components revealed by X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) characterization, it was found that CeO2 NPs were uniformly dispersed in and immobilized by a cellulose matrix. However some agglomeration of CeO2 NPs occurred at higher precursor concentrations. These results suggest that the morphology and particle size of CeO2 and the corresponding performance of the resulting films are affected by the porous RC films and the concentrations of Ce(NO3)3·6H2O solutions. The optimized nanocomposite film containing 2.95 wt% CeO2 NPs had more than 75% light transmittance (550 nm), high UV shielding properties, and a certain hydrophobicity.
Highlights
Nanocomposites of polymers and inorganic nanoparticles (INPs) have attracted increasing interest due to their value-added applications derived from their unique optoelectrical, magnetic, electrical, thermal, and antibacterial properties [1,2,3,4]
With porous regenerated cellulose (RC) film as support, transparent nanocomposite films with hydrophobicity and UV-shielding were successfully fabricated by in-situ synthesis of CeO2 NPs according to a reported method [24]
The crystal structures of CeO2 NPs, RC, and cellulose/CeO2 nanocomposite films were characterized by X-ray diffraction
Summary
Nanocomposites of polymers and inorganic nanoparticles (INPs) have attracted increasing interest due to their value-added applications derived from their unique optoelectrical, magnetic, electrical, thermal, and antibacterial properties [1,2,3,4]. Based on porous cellulose fibers, new applicable and facile techniques can be designed for preparing functional materials, good dispersion and chemical stability of the INPs in the corresponding cellulose solvents are required. CNs grew on the surface of CeO2 , accelerating the electron transfer rate of CeO2 In these literature examples, cellulose materials were only used as carriers for CeO2 NPs or as promoters for promoting CeO2 functionality, the characteristics of cellulose-based materials such as transparency and porosity, were not mentioned or utilized. With porous RC film as support, transparent nanocomposite films with hydrophobicity and UV-shielding were successfully fabricated by in-situ synthesis of CeO2 NPs according to a reported method [24]. The resulting films with transparency, UV-radiation protection, and hydrophobicity, can be used alone or in combination with other transparent plastic films by hot pressing or calendaring, showing the potential value of application in the field of UV protection
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