微晶纤维素对纸塑复合材料的性能影响

Effect of microcrystalline cellulose on properties of paper-plastic composites

采用熔融挤压法制备微晶纤维素/热塑性淀粉(MCC/TPS)薄膜,并用热压法将MCC/TPS薄膜与纸张进行复合得到纸塑复合材料。结果表明,SEM图像表明了纸塑复合材料界面层具有良好的附着力。当MCC的添加量为5%(质量分数)时,TPS薄膜的机械性能提高,还延长了水蒸气通过TPS薄膜的路径,导致MCC/TPS/纸张复合材料的水蒸气透过率降低,进而提高纸塑复合材料的阻隔性能。TPS/纸张复合材料和MCC/TPS/纸张复合材料比单纯纸张具有更好的物理性能(即平滑性、柔韧性和耐折性)。因此,添加MCC可以改善纸塑复合材料的阻隔性能、机械性能等,满足食品包装行业对低水敏性材料的要求。

The microcrystalline cellulose/thermoplastic starch(MCC/TPS)film was prepared by melt extrusion method,and the MCC/TPS film was combined with paper by hot pressing method.The results show that the SEM images show that the interface layer of paper-plastic composite has good adhesion.When the addition amount of MCC is 5wt%,the mechanical properties of TPS film are improved,and the path of water vapor through TPS film is extended,resulting in the water vapor transmittability of MCC/TPS/paper composite is reduced,and the barrier properties of paper-plastic composite are improved.TPS/paper composites and MCC/TPS/paper composites have better physical properties(i.e.smoothness,flexibility and folding resistance)than paper alone.Therefore,the addition of MCC can improve the barrier properties and mechanical properties of paper-plastic composite materials to meet the requirements of the food packaging industry for low water sensitive materials.