常用造纸填料在MFC-填料复合材料中的应用

The Applications of Paper Fillers in MFC-Filler Composites

为探索常用造纸填料在MFC-填料复合材料中的应用性能,将竣乙基化的纤维通过研磨与高压均质得到微纤化纤维素(MFC),MFC与填料形成的混合浆料通过涂布法得到高填料含量(质量分数为70%)的MFC-填料复合材料。该实验研究了4种填料与MFC制备的复合材料在结构性能、机械性能和光学性能等方面的差异。结果表明:不同种类填料制备出的MFC-填料复合材料的性能各有差异,其中片状结构的高岭土和滑石粉在机械性能方面更有利,也更容易获得较高的光泽度;而块状的研磨碳酸钙(GCC)和棒状的沉淀碳酸钙(PCC)则在光学性能和松厚度上更有利;其中MFC-滑石粉复合材料的抗张指数为22.3N·m/g,MFC-高岭土复合材料的光泽度达到了50,MFC-PCC复合材料的光散射系数高达104.21m^2/kg。

In order to explore the application performances of different paper fillers in MFC-filler composites,carboxyethylated fibers were ground and homogenized under high pressure to obtain microfibrillated cellulose(MFC).The mixed slurry formed by MFC and fillers were coated to form MFC-filler composites with high filler mass fraction(70%).In this paper,the structural properties,mechanical properties and optical properties of the composites were studied.The results showed that the properties of MFC-filler composites prepared by different kinds of fillers were different,among which the flake structure of kaolin and talc were more advantageous in mechanical properties and higher gloss,while the block GCC and rodlike PCC were more advantageous in optical properties and bulk.The tensile index of MFC-talc composites was 22.3 N·m/g,the gloss of MFC-kaolin composites can reach 50,and the light scattering coefficient of MFC-PCC composites was as high as 104.21 m^2/kg.