Preparation And Properties Of Ceramic/Polymer Composites

Adhesives are substances that allow two or more materials to bind together through interactions between the interfaces.Epoxy adhesives have become highly effective structural adhesives due to their advantages such as high adhesive strength,large adhesive force,low cure shrinkage,and easy processing and molding.However,the adhesive products produced by some factories on the market threaten the health of human beings and also have some pollution to the environment.Therefore,this article prepared a modified adhesive by adding ceramic inorganic particles to its performance.A green and environmentally friendly adhesive can greatly improve the application of adhesives.The latent curing agent zinc acrylate(ZDA)was used to cure the epoxy resin.The epoxy resin was mixed with the bisphenol A epoxy resin by physical blending and cured at high temperatures to obtain a cured epoxy resin with good properties.The experimental results show that as the amount of curing agent increases,the apparent activation energy of the curing system gradually decreases,and the curing speed increases.In addition,the mechanical strength of the cured product will increase first and then decrease with the increase of the mass fraction of the curing agent.When the content of the zinc acrylate is 15%(mass fraction),the cured product has the largest bending strength and tensile strength,reaching 89.25 MPa and 48.21 MPa,the best comprehensive mechanical properties.Titanium borate(TiB2)was used as inorganic filler,zinc acrylate as a curing agent and KH-570as an organic modifier,and titanium boride/epoxy resin composites were prepared by mechanical blending-sol-gel method.After the composite material was punched off,the fracture surface morphology and the dispersion of the titanium boride powder before and after the modification were observed.The experimental results show that compared with pure epoxy resin,boron boride can significantly improve the toughness of epoxy resin.When the mass ratio of epoxy resin to titanium boride is 100:15,the impact strength of the composite reaches the maximum value of 13.5kJ·m-2,at this time,the toughness is the best;and the titanium boride modified by the coupling agent improves the dispersibility and does not easily agglomerate in the resin.TiB2-SiO2 composite powders were prepared by high energy mechanical ball milling,and then TiB2-SiO2/epoxy resin composites were prepared by in-situ polymerization.The experimental results show that the composite powder is modified and mixed with the epoxy resin uniformly,and the multi-phase powder TiB2-SiO2 has good toughening effect on the epoxy resin,The toughness of composites will increase first and then decrease with the increase of the content of complex phase.Compared with single-phase powders,the wear properties of composite materials with multi-phase powder were improved,When the TiB2-SiO2 content is 15%(mass fraction),the friction coefficient and wear volume of the composite reach the lowest value,and the mechanical properties of the cured material reach the best.Experiments show that ceramic powder can effectively enhance toughening epoxy resin composite,and TiB2 and SiO2have certain synergistic toughening effect.