The nanocellulose from the Rosa sterilis residues (RSC-NCC) was prepared by the sulfuric acid hydrolysis method. The properties of RSC-NCC were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC). Meanwhile, the effect of RSC-NCC on the properties of soybean protein isolate (SPI) film was studied, and the microstructure of RSC-NCC/SPI film was analyzed by SEM, DSC, FTIR, and XRD. Results indicated that RSC-NSS had a diameter of about 10 nm and a length of about 500 nm, high crystallinity, and 100 ℃ of melting temperature, and retained the basic chemical structure of cellulose. The addition of RSC-NCC reduced the permeability and enhanced the mechanical properties of SPI film. SEM, DSC, FTIR, and XRD analysis showed that RSC-NCC and SPI had good compatibility, and the structure compactness and stability of the film were improved.
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