PFI磨解对MFC及纳米纤维纸基材料性能的影响

Effects of PFI refining on properties of MFC and nanofiber paper-based materials

微纤化纤维素(microfibrillated cellulose,MFC)是一种具有纳米尺度的新型纤维素纤维,具有极为广阔的应用前景。但工业化MFC产品存在尺寸分布和纤丝化程度不均一的问题,从而影响其使用。本文采用PFI磨解的方法对MFC进行后处理,结果表明:PFI磨解可显著提高MFC的均一性,磨解转数为20 000转时,小于200μm的组分含量可达到92.3%,纤维平均长度为42μm。MFC经PFI后处理可制备出具有更高性能的纸基材料,在磨解转数为60 000转时,紧度可提高66.13%,透明度可提高40.26%,吸收性下降45.83%。撕裂指数最高增幅为268.03%(10 000转),抗张指数可提高90.41%(20 000转)。

Microfibrillated Cellulose （MFC） , a kind of new cellulose fiber material with one dimensional nanometer,shows a good application future. Nevertheless, there are problems with the size distribution and the degreeof fibril homogeneity of industrialized MFC products？ which influence its utilization. The PFI refining was appliedfor MFC to post-treatment in this study. The results showed that the uniformity of MFC was significantlyimproved by PFI refining, the component with the length less than 200 /im can reach to 92.3% and the averagelength was 42 /im when the revolution of PFI was 20 000r. Higher performance of paper-based materials can beprepared by post-processing MFC with PFI refining, the tightness and transparency of paper-based materialscan be increased by 66.13% and 40.26% , respectively, the absorbency can be declined by 45.83% with the revolutionof 60 000r. The highest growth of tear and tensile index can be increased by 268. 03 % （10000r） and90.41 % （20 000r） , respectively.