HYDROPHOBIC-MODIFIED CELLULOSE FIBERS AND CELLULOSE MICROFI-BRIL AS REINFORCEMENTS FOR BIOCOMPOSITES

摘要

The hydrophobic modification of cellulose fiber (CF) and cellulose microfibril (CMF) was conducted by grafting 1-Octadecanol using TDI as a coupling agent. The optimum reaction conditions obtained for grafting were: molar ratio of cellulosic materials: 1-Octadecanol:TDI 1:1:1 (molar ratios of OH groups in fibers and reactive groups in reagents), temperature of reaction 120°C and reaction time 3 h. The grafting was confirmed by FT-IR; and TGA measurement indicated that the amounts of grafting were 16.9wt% and 13.9wt% for CF and CMF,, respectively. Moreover, the surface morphology and hydrohpho-bicity of the grafted fibers were investigated by SEM and static contact angle measurement.