Effect of 60Co-γ-Ray Radiation on Potato Starch Films

doi:10.11924/j.issn.1000-6850.casb2024-0565

Abstract

Abstract:

The study aims to investigate the effect of potato starch that is irradiated by γ-ray radiation on the properties of starch film. Starch was irradiated by ⁶⁰Co-γ-ray radiation with different absorbed doses (0-50 kGy) and the starch films were made. The prepared films were characterized by ultraviolet-visible absorption spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The results showed that γ-ray radiation caused the breakage of glucoside bond and the breakdown of starch long chain molecules. The tensile strength and elongation at break of starch film increased and then decreased with increasing absorbed doses, the light transparent of starch film decreased and then increased. When the absorbed dose was 10 kGy, the mechanical properties of the film was the best, the elongation at break and the tensile strength were 62.37% and 3.73 Mpa respectively, however, the light transmission of the film was the worst, with the opacity value of 1.29. The solubility of film increased with the increase of absorbed dose. Insoluble starch granules decreased and the surface of starch films became more and more smoothed with increasing absorbed does. γ-ray radiation could effectively destroy the molecular structure and break starch molecular chain. The mechanical properties, light transmittance, water solubility and film forming properties of starch film could be significantly changed by irradiation.

Key words: potato starch, γ-ray, irradiation, starch film, mechanical properties, transparent, solubility, film-forming

LIU Ying, GENG Dandan, LIU Liu, WEI Min, SHI Zhiqiang. Effect of ⁶⁰Co-γ-Ray Radiation on Potato Starch Films[J]. Chinese Agricultural Science Bulletin, 2025, 41(6): 153-158.

Figures/Tables 5

References 35

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Effect of ⁶⁰Co-γ-Ray Radiation on Potato Starch Films

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