| 초록 |
In this study, Graphene nanoplatelet (GnP) was used as flame retardant. GnP/Phenolic foam (PF)/Wood composite board was fabricated with different GnP contents as 5, 10, 20 wt%. The thermal properties of composite boards were investigated by thermogravimetric analysis and flame retardancy by limiting oxygen index (LOI) test. The initial decomposition temperature of composite board was delayed with increase of GnP content. Also, the char yield increased up to 9.7% when GnP was added with 20 wt%, whereas char yield of raw wood board and PF added board is 0 and 1.9%, respectively. In addition, LOI value of raw wood board was 23.8%, while that of GnP 20 wt% added composite board was 31.7%. It was confirmed that addition of GnP improves the flame retardancy of wood-based composite board. These results are attributed by higher char yield, which prevents the contact with oxygen and delays the combustion of composite board. |
