| The continuous development of contemporary high-tech and rubber industry has put forward many new requirements for rubber and its composite materials,which not only require more excellent mechanical properties,but also have some special functions.Therefore,the preparation of high-performance and functionalized rubber nanocomposites has become a hot research topic in the rubber field.MXene is a new type of material with two-dimensional nanostructures that began to be reported internationally in 2011.Its typical representative is titanium carbide（Ti3C2）.The application of Ti3C2 in rubber to prepare high-performance and functional rubber-based nanocomposites is the first research work carried out by our team at home and abroad.The key to its technology is that it must first strip Ti3C2 with a multi-layer microstructure into fewer layers or even Monolithic two-dimensional nanomaterials,and then evenly disperse them in the rubber matrix and produce a strong interface bonding effect with the rubber matrix,so that the rubber nanocomposite material has excellent mechanical properties and good electrical and thermal conductivity and wear resistance And other functions.In order to obtain Ti3C2 two-dimensional nanomaterials with few layers or single layer,and at the same time to play synergy with Si O2 nanomaterials with excellent performance and low cost,this paper innovatively prepared and studied the nanohybrid materials of Ti3C2 and Si O2and their Styrene-butadiene rubber（SBR）nanocomposites.On the one hand,the nano-hybrid material can inhibit the stacking of Ti3C2sheets and improve its dispersibility in the SBR matrix.On the other hand,the nano-hybrid material can also enhance its interface binding effect with SBR.The structure and properties of hybrid materials and styrene-butadiene rubber composites were studied through various analysis and testing methods,which provided a new theoretical basis and research approach for the application of high-performance rubber composites.First,this paper uses electrostatic self-assembly to distribute silica nanoparticles uniformly on the surface of Ti3C2 to prepare a new type of nano-hybrid material（Ti3C2-hybird-Si O2 hereinafter referred to as Ti3C2-h-Si O2）,and then add Ti3C2 and Ti3C2-h-Si O2 to the SBR matrix.and their effects on the structure and properties of the SBR composite were studied.The experimental results show that the surface of Ti3C2-h-Si O2 is rough,and it can be dispersed more uniformly in the SBR matrix.Moreover,Ti3C2-h-Si O2 has a larger specific surface area,and its surface can entangle more rubber molecular chains,which can enhance the interface bonding force between the material and the rubber matrix,so Ti3C2-h-Si O2 nano-hybrid material is better than Ti3C2 The material is more conducive to improving the comprehensive performance of SBR composites.When the amount of Ti3C2-h-Si O2 reaches 4phr,the tensile strength of SBR/Ti3C2-h-Si O2 composite reaches11.21MPa,which is 49%higher than that of SBR/Ti3C2 composite;the thermal conductivity of SBR/Ti3C2-h-Si O2 composite the coefficient reaches 0.323W?m-1?K-1,which is 58%higher than that of SBR/Ti3C2 composite material;the conductivity of SBR/Ti3C2-h-Si O2composite material reaches 0.0000743S/m,compared with pure styrene-butadiene rubber increased by 4 orders of magnitude;Ti3C2-h-Si O2 nano-hybrid material can effectively reduce the rolling resistance of composite materials and improve its wet-slip resistance.Compared with SBR/Ti3C2 composite materials,the tanδof SBR/Ti3C2-h-Si O2 composite at 60℃decreased by 17%,and the tanδat 0℃increased by 24.6%.Secondly,in order to further improve the stacking between the Ti3C2 sheets and enhance the bonding force between the filler and rubber,this paper uses the in-situ growth method to prepare the hybrid nanomaterial Ti3C2-graft-Si O2（hereinafter referred to as Ti3C2-g-Si O2）and apply it to SBR composites.The study found that,compared with the method of using electrostatic self-assembly,in the Ti3C2-g-Si O2 prepared by in-situ growth method,the particle size of Si O2 is smaller and the distribution is more uniform,and the force with the Ti3C2layer is stronger.At the same time,Ti3C2-g-Si O2 has better dispersibility in SBR composites,stronger interface binding with SBR,and can form a stronger cross-linked network structure with SBR matrix.Compared with Ti3C2-h-Si O2,Ti3C2-g-Si O2 improves the overall performance of SBR composites better.The experimental results show that when the amount of Ti3C2-g-Si O2 is 6phr,the thermal conductivity of the SBR/Ti3C2-g-Si O2 composite material reaches 0.449 W?m-1?K-1,which is higher than the equivalent parts of SBR/Ti3C2-h-Si O2 composite material is improved by 11.97%;the conductivity of SBR/Ti3C2-g-Si O2 composite material is improved by an order of magnitude compared to SBR/Ti3C2-h-Si O2 composite material;the tensile strength of SBR/Ti3C2-g-Si O2 composite material It can reach 14.05MPa,which is 12.4%higher than SBR/Ti3C2-h-Si O2 composite material.Based on the excellent properties of Ti3C2-g-Si O2 nano-hybrid materials,high-performance rubber with high strength,good wear resistance,high thermal conductivity and low heat generation can be prepared. |
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