No abstract

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 ZnO C /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.

Carbon Nanospheres (CNs) are nano-carbon materials. In order to expand their application fields, this study applies them to rubber fillers. In this study, CNs were prepared by vapor deposition method in a high temperature tube furnace. After acidification of CNs, ZnO was grown in situ on the surface of CNs. CNs@ZnO/NR composite was prepared by traditional mechanical blending method. The experimental results showed that the ZnO nanoparticles were adsorbed on the surface of CNs, resulting in a strong interfacial interaction with the CNs. In the composite material, the hybrid is uniformly dispersed in the rubber matrix under the influence of its own many factors, thereby improving the cross-linking effect of the composite material. Compared with the ZnO/NR composite, the modulus at 100%, 200%, and 300% elongation of NR composites are increased by 40.3%, 30.6%, 23.3%, and 9.6% respectively, maintaining the elongation at break of the composites. At the same time, the rigidity of the composite material is increased, the cross-linking efficiency is improved, and the crosslinking density of the composite material is greatly improved. Compared with ZnO C /NR composite, CNs@ZnO/NR composite maintained better wet-skid properties. The CNs in the CNs@ZnO can inhibit the agglomeration of ZnO nanoparticles, which can better improve the vulcanization rate and crosslinking density, and is an efficient vulcanization activator. This study provides a simple synthetic route for ZnO nanofillers for the preparation of high-performance natural rubber composites.

The electrostatic spinning method with polyacrylonitrile as the spinning precursor was used to investigate the performance of battery separator prepared from tetrabutyl titanate and isopropyl titanate as two titanium source precursors hydrolyzed under the inhibition of acrylic acid to produce different contents of TiO2 for lithium-ion batteries. The experimental results showed that when both titanium sources were prepared at 3 wt%, the comprehensive performance of the separator manufcatured with tetrabutyl titanate as the titanium source (PAN/TBT-3) and isopropyl titanate as the titanium source (PAN/TPT-3) was finest than that of the Celgard 2400 and the composite membrane with direct TiO2 addition (PAN/TiO2-3). The tensile strength of PAN/TPT-3 and PAN/TBT-3 membranes were 7.82 MPa and 4.03 MPa higher than that of Celgard 2400, and 13.29 MPa and MPa higher than that of PAN/TiO2-3 separator, respectively. PAN/TPT-3 and PAN/TBT-3 membranes exhibited a discharge capacity of 107.72 mAh/g and 115.79 mAh/g at 2 C, both the capacity retention rate was above 99.5% higher than 80.5% for Celgard 2400.

The electrostatic spinning method with polyacrylonitrile as the spinning precursor was used to investigate the performance of battery separator prepared from tetrabutyl titanate and isopropyl titanate as two titanium source precursors hydrolyzed under the inhibition of acrylic acid to produce different contents of TiO 2 for lithium-ion batteries. The experimental results showed that when both titanium sources were prepared at 3 wt%, the comprehensive performance of the separator manufcatured with tetrabutyl titanate as the titanium source (PAN/TBT-3) and isopropyl titanate as the titanium source (PAN/TPT-3) was nest than that of the Celgard 2400 and the composite membrane with direct TiO 2 addition (PAN/TiO 2 -3). The tensile strength of PAN/TPT-3 and PAN/TBT-3 membranes were 7.82 MPa and 4.03 MPa higher than that of Celgard 2400, and 13.29 MPa and MPa higher than that of PAN/TiO 2 -3 separator, respectively. PAN/TPT-3 and PAN/TBT-3 membranes exhibited a discharge capacity of 107.72 mAh/g and 115.79 mAh/g at 2 C, both the capacity retention rate was above 99.5% higher than 80.5% for Celgard 2400.