Preparation of lignin rich micro-cellulose fines (LMCFs) by chemical micronization method and characteristics of LMCFs handsheet

In this study, chemical micronization method was used to produce (lignin rich microcellulose fines (LMCFs) of 10% lignin contents. The handsheets of containing 5% LMCFs were prepared and analyzed their physical characteristics. The morphology of LMCFs were changed according to the grinder (Super Masscollider) passing number. After passing 10 times through the grinder, the shape of LMCFs became similar to those of secondary fines. The drainage time of LMCFs was much shorter than that of MFCs. The tensile index gradually increased with the grinding passing number of LMCFs. The tensile index of the handsheet containing LMCFs of 10 passing number was 38.8 N-m/g, that was 33% improvement from the handsheet without LMCFs. The brightness of the handsheet containing LMCFs was improved in proportional to the grinder passing number.