The present invention relates to films comprising a xyloglucan comprising not more than 11 mol % galactose residues, as well as a method for making such films, and its use as an oxygen barrier.

A carboxymethyl hemicellulose composite film and a preparation method are provided. The composite film includes 95 to 100 parts by weight of carboxymethyl hemicellulose, 1 to 5 parts by weight of gallic acid, and 50 to 60 parts by weight of sorbitol. The carboxymethyl hemicellulose is obtained by an etherification reaction of bamboo hemicellulose with chloroacetic acid under an alkaline condition, and a degree of substitution of the carboxymethyl hemicellulose is within a range of 0.17 to 0.59. The preparation method includes mixing the carboxymethyl hemicellulose with deionized water, the gallic acid, and the sorbitol in sequence to obtain a composite film solution; and slowly pouring the composite film solution into a mold for drying to obtain the carboxymethyl hemicellulose composite film. The preparation method has advantages of antibacterial activity, environmental friendliness, and low cost.