Study On Preparation Of Cellulose Packaging Film By Ionic Liquid Method

The regenerated cellulose films with [BMIM] Cl, based on whose strong polarity, as cellulose solvent was prepared in this paper. The new technology would obtain quality production at a low cost, preserve the environment and reduce chemical, water and energy consumption while traditional processes are energy-intensive, require large capital investments, and contribute to air and water pollution.[BMIM] Cl was synthesized and its composition and structure were analyzed and characterized by means of testing techniques, including Fourier Transform Infrared Spectroscopy (FT-IR) and1H Nuclear Magnetic Resonance (1HNMR). The results indicated consistence with expect product.The regenerated cellulose film was prepared by immersion precipitation method, and invested the effects of process parameters on the performance and structure of regenerated cellulose film. The results showed that not the dissolving conditions but the forming technology affects the performance of the film. With a decreasing cellulose concentration of casting solution or an increasing temperature of coagulation bath, the mechanical properties of film are degrading with the barrier ability declining. The effcts of increasing dissolvting temperature was similar to that of swelling time extention. Cellulose packaging film with good oxygen permeability (OP) and water vapor permeability (WVP) can be obtained by changing the content of coagulation bath. In the different plasticizing conditions, the mechanical performance and barrier performance of cellulose packaging film would change. Combined with mechanical properties and barrier ability, the the process parameters were optimized to prepare high quality packaging film.The chemical structures and crystalline forms of the original cellulose and the regenerated cellulose were analyzed by FT-IR and Wide angle X-ray scattering (WAXS), respectively. It can be found that the crystalline modification of cellulose film prepared by [BMIM] Cl process is cellulose II.It can be explained very well according to the images:Increasing temperature or [BMIM] Cl concentration of coagulation bath or concentration of casting solution leads to higher values of the roughness and that the fracture surface was being from loosen to compact by using atomic force microscopy (AFM) and scanning electron microscope (SEM) investigated on the film surface and section.