Preparation of MOF-Zn@ZnO composite and its properties in SBR

The synthesis and application of metal-organic skeleton materials (MOFs) have attracted much attention in recent years due to their special structures and properties. In order to expand the application field of MOFs materials, this paper designed experiments to explore the application prospect of MOFs materials in the field of rubber. In this study, zinc acetate dihydrate was used as the central metal ion source, terephthalic acid as organic ligand and deionized water as solvent. MOF-Zn was prepared by hydrothermal method and ZnO nanoparticles were grown on the surface of MOF-Zn in situ to obtain MOF-Zn@ZnO. At the same time, the composite material is filled into the SBR by mechanical blending method. The experimental results show that ZnO nanoparticles adsorb on the MOF-Zn surface and have strong interfacial interaction with MOF-Zn. Moreover, MOF-Zn@ZnO was uniformly dispersed in the rubber matrix, which improved the cross-linking effect of the composite material and promoted the vulcanization of rubber. Compared with ZnOC/SBR composites, the modulus and tensile strength of MOF-Zn@ZnO/SBR composites at 100%, 200%, and 300% elongation are increased by 33.6%, 38.2%, 30.8%, and 16.8%, respectively. The excellent performance of MOF-Zn@ZnO/SBR composite is due to the inhibition of agglomeration of ZnO nanoparticles by MOF-Zn, which can be used as an effective vulcanization activator in rubber. This study provides a simple synthesis route for the preparation of ZnO nanofillers for high performance SBR composites.