| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a cellulose film using a solvent other than ionic liquid to dissolve a cellulose raw material, the film being a regenerated cellulose film having improved physical strength by passing through self-assembly.SOLUTION: The production method comprises: a dissolution step (S1) of obtaining a cellulose solution by dissolving a cellulose raw material in a mixed solvent MS obtained by mixing tetrabutylammonium acetate, TBAA, and dimethyl sulfoxide DMSO; an agitation step (S2) of agitating the cellulose solution; a filming step (S3) of fabricating the cellulose solution after agitation into a filmy material; a standing step (S4) of allowing the filmy material to stand still; a coagulation step (S5) of obtaining a cellulose coagulum by making the filmy material after the standing step contact with an organic solvent for coagulation and water in this order; and an immobilization step (S6) of obtaining an immobilized material of cellulose by making the cellulose coagulum contact with a hydrophilic organic solvent.SELECTED DRAWING: Figure 1 |
