影响纤维素包装膜阻隔性能的溶浆工艺参数模型研究

Study on Effects of Parameters Model of Dissolution Process on Barrier Properties of Cellulose Packaging Film

以聚合度为1067的阔叶浆粕为原料,采用LiCl/DMAc为溶剂,利用流延刮膜法制备具有一定透氧透湿性能的纤维素包装膜;通过均匀设计建立制膜的溶解工艺参数与纤维素膜透氧透湿系数的数学模型,并对其进行显著性验证,研究溶浆工艺对纤维素包装膜阻隔性能的影响;实验结果表明:随着活化时间的延长和溶解温度的升高,纤维素包装膜的透氧透湿系数、透氧透湿能力先降低后增大;静置时间的延长将引起纤维素膜的透氧透湿系数降低;回归方程计算得到溶解条件对纤维素膜透氧透湿性能影响呈二次关联。

By adopting the polymerization degree 1 067 broad-leaved pulp as raw material, LiCI/DMAc as the solvent, the cast films with oxygen permeation flux （OPF） and water vapor permeability （WVP） are prepared by scraping. The research sets up the mathematical model of the dissolved process parameters and OPF and WVP coefficient of cellulose membrane. The results show that the OPF and WVP coefficient first increases and then decreases after the extension of activation time and dissolution temperature, and the standing time led to reduce the OPF and WVP coefficient. Through calculating on the regression equation, the dissolution conditions about OPF and WVP indicate a secondary association.