42results about How to "Improve interface bonding" patented technology

The invention provides EPS (Expandable Polystyrene) lightweight aggregate concrete and a preparation method thereof. The EPS lightweight aggregate concrete effectively meets the requirements of concrete on light weight, uniformity and density in the aspect of structure, and simultaneously has excellent comprehensive properties; the volume weight of the EPS lightweight aggregate concrete is higher than 650 kg / m<3>, the cube compressive strength can reach 1.6MPa, the strength meets the service requirements, and the lightweight aggregate concrete has excellent thermal properties and durability; and shown in a compression test, the concrete has larger deformation before the concrete is damaged due to deformation, so that the toughness of the concrete is improved. The lightweight aggregate concrete comprises the following raw materials in parts by weight: 350 parts of cement, 90-120 parts of fly coal ash, 30-70 parts of silica fume, 120-140 parts of river sand, 190-210 parts of water, 15-21 parts of EPS grains, 40-60 parts of perlite and 12-18 parts of polymer emulsion. The preparation method comprises the steps of crusting, slurry wrapping, mixing, forming and curing. The lightweight aggregate concrete obtained according to the mixture ratio and the preparation method is uniform and dense in structure, and various properties meet the design requirements, so that the EPS lightweight aggregate concrete has better application prospects.

The invention provides a polymer-based carbon-based conductive polymer composite material. The raw material composition mainly includes a polymer as a matrix of the composite material and a carbon-based conductive filler dispersed in the polymer. The matrix polymer and the carbon-based conductive filler are both Composed of no less than two different types of materials, and at least one phase of the polar polymer and the non-polar polymer in the polymer, the weight content of the carbon-based conductive material in the composite material is controlled within the range of 0.1 to 50%. . The present invention reduces the amount of filler and improves the conductivity of the material through the non-uniform distribution of the conductive filler in the two-phase polymer, and uses two carbon materials with different spatial geometry as the conductive filler to form a more complete and stable conductive network structure to further improve the electrical conductivity of the material. The invention has the advantages of low conductive filler content, high electrical conductivity, good processing performance and mechanical performance, high electrical conductivity, and flexible adjustment of processing performance and mechanical performance according to needs.

The invention discloses a glass fiber impregnating agent for a transparent plate, which basically comprises the following components in percentage by weight: 0.15-1.0 percent of silane coupling agent, 3.0-20.0 percent of binding agent, 0.02-1.0 percent of lubricating agent, 0.05-0.8 percent of antistatic agent, 0.1-2 percent of pH value adjusting agent and the balance of deionized water, wherein the binding agent is epoxy-ester emulsion or a mixture of PVAc emulsion and the epoxy-ester emulsion, and the contents of the PVAc emulsion and the epoxy-ester emulsion are calculated by respective solid content. The invention adopting the epoxy-ester emulsion or the mixture of the PVAc emulsion and the epoxy-ester emulsion as the binding agent can improve the glass fiber impregnating speed and the production efficiency; in addition, the light refractive rates of the impregnating agent and matrix resin are close, and the transmittance of the produced plate is high.

The invention discloses a 3D printing composite bio-ink material as well as a preparation method and application thereof. The composition of the composite biological ink material includes biodegradable polyester, reinforcing and toughening agent and ternary solvent system. Wherein, the ternary solvent system contains 40-90% of organic solvent, 5-45% of surfactant and 5-45% of plasticizer by mass percentage. Compared with a single low-boiling-point organic solvent system, the ternary solvent system not only improves the printability of the composite bioink, but also improves the interfacial bonding between the biodegradable polyester matrix and the reinforcing toughener, and enhances the printing process. The interfacial bonding between the middle fiber layer and the layer can endow the 3D printed composite porous scaffold with good three-dimensional structure and mechanical properties. In addition, the reinforced and toughening agent used can further improve the mechanical properties and osteogenic activity of the biodegradable polyester, endowing the composite porous scaffold with excellent ability to promote bone tissue repair.

The invention discloses a phosphorus tailing / polypropylene composite material and a preparation method thereof. The phosphorus tailing / polypropylene composite material is prepared from the following raw materials in percentage by mass: 60-95 wt% of polypropylene and 5-40 wt% of phosphorus tailing. The particle size of the phosphorus tailing is 200 mesh or below. The melt index of the polypropylene is 4g / 10 minutes. The preparation method comprises the following steps: uniformly mixing the dried phosphorus tailing and polypropylene granules to obtain a premix; and adding the premix into the double screw extruder, and carrying out melt extrusion, wherein the double screw extruder is in an identical-direction parallel double-screw mode with the length-diameter ratio of 32:1-48:1. The method reduces the polypropylene resin consumption, and lowers the cost of the polypropylene composite material. The organic floatation aid attached to the phosphorus tailing surface can enhance the interface bonding property between the tailing inorganic granules and polypropylene matrix resin, thereby enhancing the mechanical properties of the composite material and changing the processing rheological properties.

The invention discloses a chopped glass fiber sizing agent for reinforcing thermosetting resin, which is prepared by the components by weight percent: (1) 0.2-1.5% of coupling agent; (2) 3.0-20.0% of binding agent that is cross-linked polyurethane emulsion or the mixture of the cross-linked polyurethane emulsion and medium and high molecular weight epoxy emulsion, wherein the contents of the cross-linked polyurethane emulsion and the medium and high molecular weight elastic epoxy ester emulsion are based on the respective solid content; (3) 0.0-1.2% of lubricating agent; (4) 0.05-0.8% of antistatic agent; (5) 0.1-2% of pH value conditioning agent; and (6) the balance of deionized water, wherein the total weight of all the components is 100%. The chopped glass fiber sizing agent improves the bundling property of chopped glass fiber, reduces the broken filament, improves the mixing uniformity and the fluidity of the glass fiber and the BMC resin paste, and improves the mechanical strength and the appearance performance of BMC products.

The invention discloses a method for preparing carbon-coated nickel nano-particle enhanced silver-base composite material and relates to manufacturing of silver-base alloy. The method comprises the following steps: step one, the precursor NiO plus Ag2O of Ni plus Ag catalyst is prepared by a deposition-precipitation method; step two, carbon-coated nickel nano-particles plus silver in-situ composite powder are prepared by a chemical vapor deposition method; and step three, the carbon-coated nickel nano-particle enhanced silver based composite material is prepared. The method not only has simpletechnical process and low cost, avoids introducing foreign pollutant in every process of preparation technology but also overcomes the defects of non-uniform dispersion of the reinforced phase. The carbon-coated nickel nano-particle enhanced silver-base composite material prepared by the method has good electric property, comprehensive mechanical property and wearing resistance.