纳米材料对阔叶纤维素包装膜性能影响的研究

Preparation and Performance Study of Cellulose Films Based on Nano-Materials

采用NMMO法,以阔叶纤维素为原料制备纤维素膜,通过向铸膜液中添加经硅烷偶联剂KH-550改性的纳米SiO2,钛酸酯偶联剂改性的CaCO3以及载银TiO2材料制备纳米/纤维素复合膜。对制备纳米/纤维素复合膜微观结构采用原子力显微镜(AFM)和扫描电子显微镜(SEM)进行了表征,并结合力学性能和透氧性能测试分析了纳米材料结构和含量对膜综合性能的影响。结果表明:纳米材料的加入可以改善NMMO法纤维素膜的透氧性能,当改性纳米SiO2、改性纳米CaCO3和载银TiO2添加质量分数分别为2%、1%和1.5%时制备的纤维素纳米复合薄膜的综合性能达到最优。

Cellulose had been molecularly blended to form the true solution through the strong dissolving effect of the solvent N-methyl-morphine-oxide （NMMO） and modified nano-SiO2, modified nano-CaCO3 and Ag composite TiO2 were added into casting film solution. The morphological structure of composite film on the surface was investigated with AFM and SEM. The results showed that the oxygen permeation of cellulose films was improved significantly with the addition of inorganic nano materials. And the performances of nanoparticles composite cellulose film performed best when the additive amount of modified nano-SiO2 was 2%, the additive amount of modified nano-CaCO3 1%, and the additive amounts of Ag composite TiO2 1.5% respectively.