47results about How to "Structural properties are stable" patented technology

The invention discloses a CoFe2O4/N/C hollow nanosphere and preparation and application thereof. The preparation comprises: complexing dopamine with cobalt and iron metal ions under the condition of pH8-9 on a template as a SiO2 nanometer sphere to form a polymer shell layer, carbonization annealing to form N-doped carbon material loaded with CoFe2O4 metal nanoparticles, and finally, removing the SiO2 template with strong alkali to obtain CoFe2O4/N/C hollow nanosphere. In the invention, the N/C matrix hollow structure is prepared by using the SiO2 nanosphere as the sacrificial template, theCoFe2O4/N/C hollow nanosphere has a relatively large specific surface area and porosity, and can improve the distribution of CoFe2O4 nano metal particles loaded on the shell layer, enhance adsorption and catalytic activity on organic pollutants in waste water, and broaden the pH application range; the CoFe2O4/N/C hollow nanosphere can be recycled due to magnetic performance, thus saving resources.

The invention provides a preparation method of a composite nylon material. The preparation method comprises the following steps: I. adding natural polysaccharide into an acetic acid water solution, heating to be completely gelatinized, to obtain a mixture I; II, adding an emulsifier and a plasticizer into the mixture I, heating and stirring, to obtain a mixture II; III, then adding natural functional materials into water, stirring to be completely dissolved, to prepare a natural functional material water solution; IV. cooling the mixture II to 50DEG C, adding protein, performing water bath heating and stirring, to obtain a mixture III; V, mixing the mixture III with the natural functional material water solution, to obtain a mixture IV; VI, pouring the mixture IV into a mould, drying and forming a film; and VII, cooling the film obtained in the step VI to be at normal temperature. The preparation method is simple, the production cost is low, the formed preservative film has the characteristics of being non-toxic and harmless, and good in moisture barrier property, so that the preservation effect of food can be effectively enhanced.

The invention provides a preparation method of morphology-controllable large-area nanometer platy zinc-aluminum type hydrotalcite. The method is characterized in that the large-area nanometer platy zinc-aluminum type hydrotalcite is prepared on a porous anodized aluminum substrate through a water bath method with porous anodized aluminum as the substrate. Solvent of the water bath method is ultrapure water, and reactant is zinc acetate and hexamethylenetetramine. The concentration of a reactant aqueous solution of the water bath method ranges from 0.5 mM to 50 mM. The ratio of the concentration of zinc acetate to hexamethylenetetramine is 1:(1-10). The temperature of the water bath method is 45-90 DEG C. The water bath time of the water bath method is 1-7 h. The zinc-aluminum type hydrotalcite nanometer structure which is large in area, controllable in morphology, high in repeatability, good in uniformity and stable in property can be obtained through the simple water bath method on the AAO substrate. The preparation process is simple, efficient, low in cost, high in repeatability and suitable for large-batch production.

The invention discloses a graphene coated lead composite material and a preparation method thereof as well as a lead-acid battery. The graphene coated lead composite material comprises lead particles and a graphene layer covering the lead particles; the graphene layer is further doped with carbonate and stannous sulfate, and the mass ratio of carbonate to stannous sulfate to graphene in the graphene layer is (1-4):(0.01-0.06):1. The preparation method of the graphene coated lead composite material comprises the steps of preparing a precursor mixture of the graphene coated lead composite material and performing solvothermal reaction treatment on the mixture. The anode and the cathode of the lead-acid battery contain the graphene coated lead composite material. The graphene coated lead composite material is high in structural stability, electrical conductivity and capacitive performance; the preparation method of the graphene coated lead composite material is capable of guaranteeing even size distribution, and also is high in operability and environmentally friendly, and consequently, enlarged production can be realized. The lead-acid battery is excellent in specific capacity, charge-discharge performance and charge-discharge cycle performance, and long in service life.

The invention relates to a flame retardant ribbon and provides a reflective flame retardant ribbon for a micro-prism and a manufacturing method of the reflective flame retardant ribbon. The reflective flame retardant ribbon for the micro-prism is simple and reasonable in structure, has excellent retroreflectivity, can play a role of reflecting light efficiently for a long time, makes up for the defects of traditional light reflecting technology, is manufactured by the manufacturing method which replaces an existing manufacturing method of reflective flame retardant materials, has a good flame retarding effect and strong reflectivity and achieves the purpose of protecting firefighters comprehensively. The reflective flame retardant ribbon comprises a flame retardant layer, a substrate layer, a micro-prism resin pyramid layer and a flame retardant fabric layer, wherein the flame retardant layer is a colorless transparent layer and is applied to the upper surface of the substrate layer, the micro-prism resin pyramid layer is embedded on the lower surface of the substrate layer, and the flame retardant fabric layer covers the micro-prism resin pyramid layer.

The invention discloses an easy-to-air-slake scintillator photonic crystal and a preparation method thereof. Through transferring of a heat release adhesive tape, direct contact of an easy-to-air-slake scintillator and water in the preparation process is avoided; the photonic crystal prepared through the method is stable in structure property and compact in structure, light output of the scintillator can be remarkably enhanced, and the enhancement effect of the photonic crystal is achieved; and the method is economical and applicable, and batched production can be achieved.

The invention discloses a water treatment photocatalyst and a preparation method thereof. The water treatment photocatalyst is formed by loading silver sodium niobate tantalate/silver molybdate/modified silver phosphate composite particles in spherical porous hydroxyapatite. The method comprises the following steps: compounding silver sodium niobate tantalate, silver molybdate and modified silverphosphate to prepare a photocatalyst, and then combining hydroxyapatite as a matrix material with the photocatalyst. The functions of the matrix material and the photocatalyst are not hindered; and the hydroxyapatite as the matrix material is spherical after being molded, and the spherical hydroxyapatite has stable structure and properties, has a good adsorption/decomposition performance to environmental pollutants, and can treat the environmental pollutants without applying new load to the environment.