| 초록 |
Advancement of polymer matrix composites reinforced with natural fibers has extensively attracted researchers’ focus due to renewable, low cost, light weight, etc. Importantly, the biodegradability and environmental compatibility features of these composites have made them suitable replacement of the petroleum based composites in various applications include automobiles, aeronautical, electronics, construction and packaging industries. The biggest advantage of utilizing natural fiber composites is that they exhibit superior properties than its own constituents (matrix and reinforcement) and at times display properties which neither of the constitutes possess. However, hydrophilic natural of natural fibers supressing properties especially mechanical strength of the composites because of the poor compatibility of the matrix and the reinforcement. Moreover, polymer matrices and natural fibers are easily degraded at high temperature and fire, which has limited their application in certain areas. Present study summarizes recent progress regarding mechanical and flammability of natural fiber composites by utilizing thermo and thermosetting polymer matrices and natural fiber/fabric through various molding techniques i.e., injection, compression & VARTM and optimized their parameters in the light of mechanical properties. Various flame retardants including bio-waste (oyster shell powder, chitosan) additives were used in the composites and studied the effect of additives on flammability as well as mechanical behaviour. The interaction mechanism between additives and matrix/fibers played very important role for the overcome the negative effect of flame retardant fillers on the mechanical properties of the composites. However, the improvement of mechanical and flame retardancy in natural fiber reinforced composites is being great task, but the effective processing of natural fibers before reinforcement and addition of selective most appropriate flame retardant fillers will hopefully contribute and serve the purpose. |
