喷涂阳离子化MFC对柴油滤纸原纸孔隙特性的影响研究

Effect of Spraying Cationic Microfibrillated Cellulose on the Pore Characteristic of Diesel Filter Base Paper

关键词:  阳离子化微纤化纤维素  复合柴油滤纸原纸  孔隙特性  透气度

Key Words:cationized microfibrillated cellulose  composite diesel filtrer base paper  pore characteristic  air permeability

摘要:以漂白硫酸盐针叶木浆为原料制备不同直径的阳离子化微纤化纤维素（C-MFC），并将C-MFC喷涂在单层柴油滤纸原纸（基纸）表面得到复合柴油滤纸原纸（复合原纸）；通过扫描电子显微镜（SEM）分析其表面形貌，实验分析不同直径C-MFC对复合原纸孔隙特性、强度、透气度及紧度等性能的影响。结果表明，随着均质压力从10 MPa增加到70 MPa时，C-MFC的平均直径从154.5 nm降至68.3 nm；复合原纸的平均孔径由空白样的21.3 μm逐渐降低至14.1 μm，最大孔径由64.2 μm逐渐降低至38.0 μm，且孔径分布更加均一；喷涂C-MFC显著改善基纸的强度性能，在均质压力70 MPa条件下获得的C-MFC用于复合原纸制备，其抗张指数和耐破指数相比于空白样分别提高了61.2%和124.6%。

Abstract:The cationized microfibrillated cellulose (C-MFC) with different diameters was prepared from softwood bleached kraft pulp (SBKP) was sprayed onto the surface of a single-layer diesel filter base paper (the substrate) to obtain the composite diesel filter base paper (the composite base paper). The surface morphology of diesel filter base paper was analyzed by scanning electron microscope (SEM). The effects of C-MFC with different diameters on the pore characteristic, strength, air permeability and density of the composite base paper were experimentally analyzed. The results showed that the average diameter of C-MFC decreased from 154.5 nm to 68.3 nm when the homogenization pressure was increased from 10 MPa to 70 MPa. Compared with the blank sample, the average pore diameter of composite base paper was reduced from 21.3 μm to 14.1 μm, and the maximum pore diameter was reduced from 64.2 μm to 38.0 μm. And the pore size distribution of filter base papers was more uniform. The spraying of C-MFC could significantly improve the strength properties of diesel filter base paper. Prepared with C-MFC product which was obtained at a homogenization pressure of 70 MPa . The tensile index and burst index of the composite base paper were increased 61.2% and 124.6%, respectively compared with the control sample.