Characterization Of Multi-reinforced Polymer With Novel Nano-Sic And Graphene

In the past few decades,resin matrix composites have been widely applied in various fields due to their excellent young's modulus,tensile strength,wear resistance and storage modulus.In recent years,the resin based composites industry has been developing rapidly,driven by the rapid rise of nano particle synthesis technology.With the development of atomic particle synthesis technology,a large number of excellent and high-performance composite fillers,such nanoparticles have excellent thermal,mechanical,optical and barrier properties,and the cost is relatively low.Polyamide,which can be used as a matrix of composite materials,is widely favored by researchers of composites because of its high strength,toughness and stability.In this paper with high strength,high wear resistance,good chemical stability of nano Si C and known as the "graphene twenty-first Century magical material as the reinforcement with polyamide matrix composites was prepared and characterized from two aspects of thermal and mechanical properties.The composite samples prepared in this study are compact and uniform on the whole,without obvious defects such as pores or gaps.The mechanical properties of nano Si C composite materials the enhancement effect is significant,especially in the 7.5% Si C reinforcement effect is obvious,the tensile strength was 71 MPa,increased by 47.7%,the young's modulus is 1396.9MPa,increased by 33.3%,and the hardness increased by 5 times,but the enhancement of nano scale phase is difficult to avoid in the matrix part of reunion,when adding silicon carbide the amount of up to 10% reinforced phase reunion is particularly serious,but the thermal effect is not obvious.Graphene modified composite material on the mechanical properties are improved significantly,the graphene content of2.5% can be reached 58.7MPa,increased by 37.8%,while the young's modulus is increased by 13.5%,up to 1190.1MPa,while the toughness decreased,but the overall effect is not big,crystallinity with graphene content increased,when add the 2.5% graphene crystallinity of nearly 80%,the pure matrix crystallinity was only 45%,and a certain extent improve the melting of the composite,improve the thermal stability of the materials.The main purpose of this paper is to explore the effect of two element enhancement on the performance of the matrix material.When the two kinds of composite material reinforced particles than single particle reinforced,more obvious advantages,mainly reflected in the amount of time can achieve relatively large performance increase in total amount less,to a certain extent,reduce the cost,and in addition to optimizing the effect of mechanical properties is more obvious.Among them.When the nano Si C and graphene content were 2.5% and 1.25%,the tensile strength of the composite is 63.8MPa,compared with an increase of twelve in the pure poly amide 49.7%,hardness is 45.8HD,increased by nearly 4 times,the young's modulus was 1153.6MPa,increased by 10.1%.The crystallinity is also greatly increased,the maximum can reach 80.4%.The addition of functional blocks acts as nucleating agents,which accelerates the crystallization speed of polymer melts and increases the melting point of composite materials to a certain extent,and improves the thermal stability of materials.Especially when the content of nano silicon carbide and graphene is 2.5% and 1% respectively,the thermal stability of the materials at high temperature is relatively high.