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The drop shape and water contact angle of edible films; lateral photograph of water drops on the edible films: (a) WPI-PU/Gly edible film, (b) WPNFs-PU/Gly edible film, (c) WPNFs-PU-ACN/Gly edible film, and (d) comparison of water contact angle of the surface of the edible films. Different letters (a,b) represent significant differences (p < 0.05).
