Provided is a collagen-cellulose material comprising 1.0-9.0 wt. % of a collagen, based on a total weight of the collagen-cellulose material 0.2-3.0 wt. % of cellulose or a derivative thereof. It is based on the total weight of the collagen-cellulose material 0.5-6.5 wt. % of at least one acid selected from the group consisting of an inorganic acid, an organic acid, and mixtures thereof, based on the total weight of the collagen-cellulose material and water.