102. Preparation and Characterization of Natural Cellulose Packaging Film

The aim of this paper was to research the production conditions and the properties of the natural cellulose food packaging film. We used cotton pulp, bleached wood pulp, and bleached reed pulp as raw materials. We adopt environment-friendly cellulose solvent N-methylmorpholine-N-oxide (NMMO) method, after degassing, scraping, and bathing made of thin films. The single-factor experiment investigated cellulose types, cellulose concentration, coagulation bath concentration and temperature, and plasticizer concentration. Natural cellulose film-forming optimum conditions were explored by the orthogonal. Single-factor experiment got the greater impact factors such as cellulose types, cellulose concentration, and plasticizer concentration. The optimum conditions are the cotton pulp of concentration is 6 %, the plasticizers glycerol of concentration is 4 %, and the coagulation bath temperature is 20 °C. The performance of films is tested under the following conditions: TS is 4.764 MPa, E is 47.0 %, WVP is 2.58 × 10⁻⁷g (m s Pa)⁻¹, H is 27.5 %, OTR is 4.98 (cm³ mm) (m² d 0.1 MPa)⁻¹, Po is 6.52 (g mm) (m² d)⁻¹, and T is 85.3 %. The films can be used for packaging low-moisture greasy food.