Preparation of Porous Cellulose Packaging Films in Alcohol Coagulation
The barrier properties of the cellulose packaging films are current concerns for the fields of fruits and vegetables fresh-keeping packaging.One such porous films commonly used the pore formers as hole-forming materials whereas the compatibility and dispersity were not better with the cellulose solutions.In this study,the porous cellulose packaging films were prepared with natural broad-leaved pulp and LiCl/DMAc with different types of coagulation baths.The effects of methanol,ethanol,isopropanol,LiCl/DMAc and deionized water coagulation baths on the physical structures,oxygen and water vapor permeabilities and mechanical properties of the films were measured.Based on the scanning electron microscpy (SEM) observation,the cross section was loose when used the alcohol coagulations,especially the films with ethanol coagulation showed dactylopores.It was also found that the oxygen permeability had obviously improving with the effect of ethanol,which compared with water vapor permeability of the films.The porous cellulose packaging films had better mechanical properties and up to 12.7MPa which would satisfy the usage in packaging.
cellulose porpous packaging films alcohol coagulation
GAO Shan-shan WANG Jian-qing Ma Xiu-feng ZHAO Lin
College of Graphic Arts, Qufu Normal University, Rizhao 276826, China College of Packaging and Printing Engineering, Tianjin University of Science & Technology, Tianjin 3
国际会议
the 2nd China Academic Conference on Printing and Packaging (2012第二届中国印刷与包装学术会议(CACPP 2012))
北京
英文
557-560
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）