| 초록 |
The carbonaceous filler material for polypropylene (PP) composites was fabricated through carbonization of citric acid (CA) and tannic acid (TA) and subsequent functionalization with Cashew-Nut-Shell-Liquid (CNSL). Carbonized mixture of citric acid and tannic acid contained particles which are 200 - 400 nm in dimension and 10 – 30 nm in height. After functionalization with CNSL, the particles changed into 200 nm in dimenstion and 6 - 7 nm in height. These carbonized particles were named as bGO and functionalized particles were cbGO. A series of PP/cbGO composites of 0 wt%, 0.5 wt% 1.0 wt% and 2.0 wt% cbGO loading were prepared. The tensile strength, Young’s modulus, flexural strength and flexural modulus all increased with the addition of cbGO. The maximum increment was reached at 2.0wt% filler content and the increment was 20 % (tensile strength), 31 % (Young’s modulus), 26 % (flexural strength) and 32 % (flexural modulus). These composites also showed improved thermal stability. |
