Study On The Praperation And Properties Of Micro-and Nano-sized SiC/FKM Composite

With the development of the ship industry, the requirements for low vibration and little noise ofships increase constantly. Although rubber is a common antivibration noise reduction material, incomplex marine environment, the rubbers should not only have high damping, high anti-compression,high strength and good abrasive resistance, but also have the ageing resistance, corrosion resistance aswell as long service life. That is to say, conventional rubber materials could not meet the actualapplication requirements. Moreover, the special fluorine rubber material with low strength and poorstiffness controllable, have less been applied in ocean engineering. Therefore, it is very imminence toimprove the strength, stiffness controllable and long service life of fluorine rubbers.In this paper, the SiC/FKM composite materials were prepared by mechanical blending with themicro and nano-sized SiC filled in fluorine rubbers. According to the national standards, the mechanicalproperties and ageing-resistant performance of fluorine rubbers and the SiC/FKM composite materialswere measured. The influences of the content of SiC on the properties of SiC/FKM composite materialswere studies. And then, based on the tensile fracture morphology analysis, the reinforced mechanisms ofthe fluorine rubber were also investigated. Moreover, substrate storage performance of fluorine rubberwas further forecast.The results of the study show that the properties of the SiC/FKM composite materials prepared bymicro-and nano-sized SiC, which is modified by KH550, filled in fluorine rubber have been improved.The fracture surface of the SiC/FKM composite was smooth, and SiC particles were well dispersed.While the volume fraction of SiC reached25%, the particles were accumulation. The storage modulusand loss modulus of fluorine rubber were increased by the content of SiC increasing. Though SiC wouldreduce damping performance of the fluorine rubber, the impact is little at room temperature.The calculated results show that the length of storage period of fluorine rubber was15.8, which isindicated that the fluorine rubber have long service life. SiC with high thermal conductivity, hightemperature resistant, which could improve the thermal conductivity and ageing performance of fluorinerubber. In the same ageing conditions,20%-SiC/FKM composite materials had the better properties, theelongation at break and change rate of the tensile strength were44.0%and5.8%, respectively.