Abstract:In this study，the effect of nanocellulose（NCS）on the properties of sodium alginate edible film was investigated.Firstly，the static rheological properties of the alginate-NCS based film-forming solution were studied.Subsequently，the light transmittance，water solubility，water vapor transmission rate，oxygen transmission rate，and infrared spectral characteristics of resulting films were determined under different drying temperatures.The results showed that，all film-forming solution exhibited the pseudoplastic bahviour，and the viscosity of film-formign solutions were increased with increasing the the NCS content.Among the tested drying temperature，the light transmittance of resulting film significantly decreases，whereas the water-soluble time increased with increasing the NCS content.Moreover，alginate-NCS blend films obtained by drying at 50℃showed the best barrier properties.Compared to the pure sodium alginate film，water vapor transmission rate（WVP）value of the alginate-15% NCS blend films was reduced to 28.7%，while oxygen transmission rate the alginate-5% NCS blend films was reduced to 22.1%.According to the infrared spectroscopy（FTIR）result，the absorption peak of the alginate-NCS blend films functional shifted.This could be due to hydrogen bonding interaction between the alginate and NCS，thereby improving the barrier properties of the sodium alginate films.