Design And Preparation Of Directional Graphene Oxide Interbed/Cyanate Ester Composites

Replacing tanks’ metal materials with resin matrix composite materials to reduce the weight of the fuel or combustion agent storage tanks,it can effectively reduce the transportation cost and the rocket launching cost,which a broad application prospect.At present,extensive and in-depth experimental researches have been carried out in this field interiorly and abroad,including astronautic field.The leakage of resin matrix composites is divided into diffusion leakage and crackle leakage.The main research content is to improve the gas isolation performance of resin matrix composites,in order to reduce the diffusion leakage.In addition to reducing the diffusion leakage,this paper also tries to improve the toughness of resin matrix composites,which could be able to prevent the crack and its corresponding leakage.First of all,by using directional solidification ice templates,this paper utilizes the negative L-glutamic acid in aqueous solution to connect positive magnetic graphene oxide by creating ionic bonds to imitate the structure of nacre.It can not only increase the diameter of the wild phases,but also improve the toughness of the corresponding resin matrix composites.With the toughening effect of the nacre-like structure,resin matrix composites have excellent toughness.What is more,based on reasonable hypotheses,the two distribution probability model is used to establish the air leakage model of directionally aligned nanosheets reinforced resin matrix composites,so the existing gas isolation theoretical model is improved and numerical simulation is carried out.The simulation results show that the greater the diameter and the more the amount of the nanoscale phases,the better the gas isolation performance of resin matrix composites.Therefore,the amount and diameter of nanosheets are qualitatively analyzed to provide theoretical guidance for subsequent experiments.Finally,the gas barrier property of resin matrix composites is tested by helium spectrometer leak detector,which shows that the air separation performance of the composites has been improved by 52.0%.The single edge notch 3-point bending method is used to test the toughness of resin matrix composites,which shows that the toughness of the composites was greatly improved,the amount of increasing is more than 4 times than that of directionally arranged single magnetic graphene oxide reinforced resin matrix composites.