Nano-fibrillation behavior via silylation with mechanochemical method on microcrystalline cellulose and impact on mechanical properties of silicone composite

초록

The purpose of this work is the synthesis of silicone foam (SF) containing silylated cellulose for improving the mechanical properties of SF. Microcrystalline cellulose has some drawbacks such as poor wettability, lower thermal stability, moisture absorption, and lower compatibilit y between matrix and cellulose. To overcome these disadvantages, tremendous hydroxyl group of microcrystalline cellulose uses as reacti on spots for surface modification reaction. The reaction system uses a wet-ball milling system, mechanochemical and eco-friendly method. Moreover, expecting the nano-fibrillation behavior of cellulose by reducing the hydroxyl group and its hydrogen bonds. After silylation react ion, the specific area of cellulose increases at least 10 times, and the compatibility with SF is also improving due to the high specific surfac e area, hydrophobicity and wettability. As a result, the tensile strength of SF and modified cellulose containing SF, extremely increase 9 to 397 kPa.