4 results about "Ion carriers" patented technology

The application discloses a special tubular notch fiber for crack resistance of a concrete floor and a preparation method thereof. The fiber is a three-level composite tubular structure, comprising a shape memory alloy core layer, a biomimetic mineralization intermediate layer and a self-repairing shell layer. The shape memory alloy core layer is a nickel-titanium-copper shape memory alloy, and the phase transition temperature is 30-50 DEG C. The biomimetic mineralization intermediate layer comprises urease and a calcium ion carrier. The self-repairing shell layer is a microcapsule-encapsulated epoxy resin-curing agent system, and the surface of the self-repairing shell layer is provided with multistage micro-nano notches. The tubular notch fiber can intelligently respond according to the crack development stage, and through the synergistic effect of multiple mechanisms such as shape memory effect, ion-induced mineralization, self-repairing release and mechanical anchoring, the multi-scale crack resistance from micro to macro is realized, and the crack resistance and durability of the concrete are significantly improved. Experiments show that the fiber starts repairing when the crack width is 0.1 mm, the repairing rate reaches 92% in 72 hours, and very good technical effects are achieved.

This invention provides an iron-based secondary hydrogen conversion catalyst, its preparation method, and its application. The catalyst is prepared by treating alumina with N and Mg, and then using the treated alumina as a support. The iron loading is 10-25% of the alumina mass. When used in the secondary hydrogen conversion reaction, the catalyst achieves a conversion rate of 92.6%-98.4%. This invention introduces alkali metal ions onto the surface of the nitrided alumina, forming a thin-shell distribution on the support surface, reducing diffusion resistance and thus improving catalytic activity. Simultaneously, a magnesium-aluminum spinel structure is formed on the modified support surface, providing more tetrahedral defect sites for the active components, further enhancing catalytic activity. The catalyst particle strength is ≥350 N / cm². 2 The wear rate is less than 0.5%, which significantly improves the flow resistance of the catalyst bed under the conditions of positive and negative hydrogen conversion.

The present disclosure belongs to the technical field of biomedicine, and specifically relates to an iron ion carrier, a preparation method therefor and the use thereof. The present disclosure has the following advantages: the iron ion carrier can have good binding activity with both ferric ions and ferrous ions, has low cytotoxicity, and has a long in-vivo drug half-life.

The application belongs to the field of heterogeneous catalysts, and relates to a heterogeneous catalyst and a preparation method thereof and application of the catalyst in preparation of polyphenyl ether oligomers. The catalyst is a supported organic amine-metal ion heterogeneous catalyst, and the structure of the catalyst is composed of a porous inorganic carrier, a silane coupling linker, an organic amine catalytic group and a metal ion coordination center. The application adopts a supported organic amine-metal ion heterogeneous catalyst / hydrogen peroxide / surfactant synergistic system, and under different organic amine catalytic groups, metal ions, carrier types, surfactants and process conditions, polyphenyl ether oligomers can be obtained. n The product M obtained by the method has a molecular weight of 1420-1905, a PDI of 1.33-1.58 and a hydroxyl value of 54.8-84.0 mg KOH / g; the method can effectively reduce the molecular weight of the polyphenyl ether, increase the hydroxyl value and keep suitable dielectric loss, and is suitable for a high-frequency high-speed copper-clad plate resin system.