The Preparation Process And Performance Study Of PCL/GE Composite Material

Now,bone dysfunction and malformation caused by bone damage and bone atrophy have brought more and more attention to the research of bone tissue scaffold materials.Poly(s-caprolactone)(PCL)itself has good biological sex and biodegradable,makes it become the focus in the bone scaffold materials over the years,but it is only in this respect is not very well meet the performance requirements of bone scaffold material.In order to get the ideal bone repair materials,the composite materials need to have strong mechanical strength and fast degradation rate.In this paper,graphene(GE)is chosen as the strengthening phase,because GE is the strongest and hardest substance in the world,so as to improve the mechanical properties of the whole material.Using PCL and GE advantage complementarity of two kinds of material,through the way of solution polymerization of nanometer composite scaffold,and by changing the increase phase the type and content of GE and control variables such as the kinds of coupling agent was prepared to discuss a certain mechanical strength and lower crystallinity of bone scaffold material.In this paper,PCL/GE and PCL/GO were prepared,the composite materials were tested by Infrared(IR),Tensile,Wear-resisting,X-ray(XRD),Thermo Gravimetric Analyze(TGA)and Differential Thermal Gravity(DTG).The tensile strength and wear resistance of the PCL matrix materials can be effectively enhanced by tensile testing and wear resistance test.The tensile strength of PCL/0.4wt%GE nano-composite material was 22.80 Mpa,which increased by nearly 150%compared with the tensile strength of pure PCL.The tensile strength of PCL/0.2wt%GO nano-composites was 26.23 Mpa,which increased by nearly 170%compared to the tensile strength of pure PCL.The non-isothermal crystallization of XRD test and composite materials indicates that the existence of GE and GO reduces the crystallinity of PCL matrix material and increases the peak crystallization temperature of PCL.This means that the degradation rate of composite materials will increase,increasing their biodegradability.The test results of DTG and TGA showed that PCL/GE nano-composites and PCL/GO nano-composites had an increase in thermal decomposition compared to pure PCL matrix materials,and the maximum weightloss rate increased.So in this paper the preparation of materials of bone tissue engineering was confirmed as the following:PCL as substrate material,the enhancement of GO content is 0.4%,coupling agent is KH-550,solvent for methylene chloride,solution polymerization with PCL/GO nano-composites.