14 results about "Strontium phosphate" patented technology

The invention relates to the field of dental implants, in particular to a bone-friendly dental implant and a preparation method thereof.The preparation method comprises the following steps that 1, bone-friendly active biological ceramic, strontium phosphate and beta-magnesium glycerophosphate are mixed in tantalum metal powder, and a mixed raw material is obtained; step 2, performing 3D printing on the mixed raw material to obtain an implant matrix; step 3, generating a polydopamine coating on the implant matrix to obtain a coated implant; and step 4, adhering hydrogel to the coating implant, so as to obtain the bone-friendly dental implant. On one hand, the polydopamine coating forms a covalent bond with tantalum metal powder through a catechol group, and is chelated with strontium / magnesium ions through a quinonyl group; on the other hand, phenolic hydroxyl groups of the polydopamine coating and polar groups of the hydrogel form a hydrogen bond network, and the polydopamine coating and the hydrogel have a cation-pi effect and hydrophobic synergy. Therefore, the hydrogel can be indirectly and firmly bonded with the implant base body through the polydopamine coating.

The invention relates to the technical field of flame retardants, in particular to a composite flame retardant, a composite flame-retardant master batch and a preparation method of the composite flame retardant and the composite flame-retardant master batch. The composite flame retardant comprises the following components in percentage by weight: 15-65% of antimony salt and 35-85% of phosphate, wherein the phosphate comprises one or more of strontium hydrogen phosphate, strontium phosphate and aluminum hypophosphite. According to the composite flame retardant, the antimony salt with relatively low content is compounded with the specific phosphate, so that the dependence on antimony resources is reduced, and the composite flame retardant has the characteristics of excellent flame retardant effect and relatively low cost, can be directly used in a mixed powder form, can also be prepared into different master batch forms for use according to requirements, and is suitable for industrial production. Therefore, the flame retardant can be well applied to flame-retardant high polymer material products.

The invention belongs to the technical field of lithium ion battery silicon-based negative electrode material preparation and solid waste recycling, and discloses a method for preparing a porous silicon-based negative electrode material through cooperation of silicon-aluminum-copper waste and phosphorus-strontium ultra-refining. Pretreated battery recycled waste aluminum, high-purity silicon powder, industrial waste copper and alloy raw materials are mixed and smelted to prepare a continuous aluminum-silicon alloy thin strip, the thin strip is crushed to 0.5-10 mm, and the porous silicon-based negative electrode material can be obtained through the steps of hydrochloric acid leaching, oxalic acid deep treatment, gradient solvent replacement and the like in sequence. The invention innovatively provides a core thought of solid waste synergy-multi-component synergy modification-multi-phase synergy etching: diamond wire cutting silicon waste (DSSW), industrial waste aluminum and waste copper are taken as raw materials, phosphorus (P), strontium (Sr) and other optional modification elements are introduced, and the submicron porous silicon-based negative electrode material is prepared by adopting an aluminum-silicon-copper alloy method.

This invention relates to the field of dental implants, specifically to an osteogenic dental implant and its preparation method, comprising the following steps: Step 1, mixing osteogenic bioceramic, strontium phosphate, and β-glycerol magnesium phosphate in tantalum metal powder to obtain a mixed raw material; Step 2, 3D printing the mixed raw material to obtain an implant matrix; Step 3, generating a polydopamine coating on the implant matrix to obtain a coated implant; Step 4, bonding a hydrogel to the coated implant to obtain an osteogenic dental implant. The polydopamine coating of this invention forms covalent bonds with the tantalum metal powder through catechol groups and chelates strontium / magnesium ions through quinone groups. Furthermore, the phenolic hydroxyl groups of the polydopamine coating form a hydrogen bond network with the polar groups of the hydrogel, and also exhibit cation-π interactions and hydrophobic synergy with the hydrogel. Therefore, the hydrogel can be indirectly and firmly bonded to the implant matrix through the polydopamine coating.

The invention belongs to the technical field of metal surface treatment, and discloses a surface sealing coating for an antibacterial stainless steel coloring film and a sealing treatment method of the surface sealing coating. The surface sealing coating comprises the following raw materials in parts by weight: 30-50 parts of matrix resin, 15-25 parts of corrosion inhibition filler, 5-10 parts of an adhesion promoter, 20-30 parts of a solvent, 2-5 parts of an auxiliary agent and 5-20 parts of an organosilicon quaternary ammonium salt antibacterial agent. Wherein the matrix resin is epoxy modified acrylic resin; the corrosion inhibition filler is selected from at least one of modified strontium aluminum phosphate and nano silicon dioxide. According to the invention, the epoxy modified acrylic resin is used as matrix resin, and has high adhesiveness of epoxy and weather resistance of acrylic acid; environment-friendly corrosion inhibition filler strontium aluminum phosphate is compounded with nano silicon dioxide, so that corrosion inhibition ions are released when the coating is damaged, and pitting corrosion is inhibited; meanwhile, by slowly releasing the organosilicon quaternary ammonium salt compound, adhesion and breeding of bacteria are effectively hindered.

The present invention provides an insulating coating composition that can improve the weldability of electrical steel sheets, an electrical steel sheet including a coating layer composition having the above advantages, and a method for producing an insulating coating composition having the above advantages. [Solution] The method includes the steps of mixing a resin containing an organic substance with at least one metal phosphate selected from Mg, Al, Ca, Sr, Mn, and Zn in a ratio of the resin to the metal phosphate of 1 / 9 to 1 / 1 based on solid content, and adding at least one metal chloride selected from Al, Ca, Mg, Sr, Zn, and Fe to the mixture that has undergone the mixing step in an amount of 1 to less than 40 parts by weight based on solid content per 100 parts by weight of the mixture, wherein the metal chloride includes at least one of iron sulfate (FeSO4), aluminum sulfate, calcium sulfate, magnesium sulfate, manganese sulfate, strontium sulfate, and zinc sulfate, and the metal phosphate includes at least one of aluminum phosphate, magnesium phosphate, calcium phosphate, strontium phosphate, manganese phosphate, and zinc phosphate.

The invention relates to the field of medical implants, in particular to a bone-parent interbody fusion cage and a preparation method thereof.The preparation method comprises the following steps that 1, tantalum metal powder is subjected to 3D printing, and a substrate layer is obtained; 2, tantalum metal powder and bone-affinity active biological ceramic are subjected to 3D printing on the substrate layer, a transition layer is formed, and a base body is obtained; 3, performing plasma spraying on the matrix to form a biological ceramic layer so as to obtain an initial product; 4, the initial product is soaked in a strontium phosphate and beta-magnesium glycerophosphate mixed solution, drying and curing are conducted, and the bone-parent interbody fusion cage is obtained. The porosity of the substrate layer can be automatically adjusted, stress is gently transmitted from rigid metal to flexible ceramic through the transition layer, and interface stress concentration is reduced. The biological ceramic layer and the transition layer form an interlocking structure, so that the interfacial shear strength is enhanced. Strontium phosphate and beta-magnesium glycerophosphate are enriched on the surface of the material, so that osteoblast migration can be rapidly induced, and mineralization can be continuously promoted.

This application relates to the field of medical implants, specifically to an osteogenic intervertebral fusion device and its preparation method, comprising the following steps: Step 1: 3D printing tantalum metal powder to obtain a base layer; Step 2: 3D printing tantalum metal powder and osteogenic bioceramic onto the base layer to form a transition layer, obtaining a matrix; Step 3: Plasma-spraying osteogenic bioceramic onto the matrix to form a bioceramic layer, obtaining a preliminary product; Step 4: Immersing the preliminary product in a mixed solution of strontium phosphate and β-glycerophosphate magnesium phosphate, drying and curing to obtain the osteogenic intervertebral fusion device. In this application, the base layer can autonomously adjust its porosity, and the transition layer allows for a smooth stress transfer from rigid metal to flexible ceramic, reducing interfacial stress concentration. The bioceramic layer and the transition layer form an interlocking structure, enhancing the interfacial shear strength. Strontium phosphate and β-glycerophosphate magnesium phosphate are enriched on the material surface, which can both rapidly induce osteoblast migration and continuously promote mineralization.

To provide an antimony-free composite flame retardant, an antimony-free flame retardant masterbatch, and a manufacturing method thereof, which can solve the flame retardancy problem at present when antimony resources are scarce, realize antimony-free flame retardant products, and have advantages such as high flame retardancy, safety, low toxicity, low cost, and a wide range of raw material origins. The antimony-free composite flame retardant of the present invention contains, by weight percentage, 10% to 90% of melamine polyphosphate and 10% to 90% of an inorganic phosphate containing strontium hydrogen phosphate and / or strontium phosphate.

The invention relates to the technical field of bone repair scaffolds, in particular to a directional multifunctional bone repair scaffold prepared through a pulling-folding method and a preparation method and application thereof. Comprising a polycaprolactone-collagen mixture and a strontium phosphate mineralization layer, wherein the polycaprolactone-collagen mixture is internally provided with a honeycomb micropore structure, and the strontium phosphate mineralization layer covers the surface of the polycaprolactone-collagen mixture. The honeycomb forming process of cooking sugar, namely repeated stretching and folding of a semi-solid mixture, is simulated, and structural orientation and porosity can be induced without a solvent or special equipment. In-situ mineralization is carried out by using strontium apatite, so that the biological activity is further enhanced, and the dual effects of Sr < 2 + > in angiogenesis and osteogenesis are utilized. The system characterization proves the mineralization uniformity and interface stability of SrAP. The in-vitro research shows that the bone cell migration is increased by 1.37 times, and the expression of VEGFA / RUNX2 is up-regulated by 1.15 times / 121.26 times. A rat skull defect model shows that the bone regeneration rate is 50.85% after 6 weeks, and micro-CT and histological examination shows that mature vascularized bones are formed.

The invention relates to the technical field of flame retardants, in particular to an antimony-free composite flame retardant, an antimony-free flame-retardant master batch and a preparation method of the antimony-free composite flame retardant. The antimony-free composite flame retardant comprises the following components in percentage by weight: 10-90% of melamine polyphosphate and 10-90% of inorganic phosphate, and the inorganic phosphate comprises strontium hydrogen phosphate and / or strontium phosphate. The antimony-free composite flame retardant adopts an antimony-free composite formula of melamine polyphosphate and strontium hydrogen phosphate and / or strontium phosphate, the flame-retardant efficiency of the antimony-free composite flame retardant is superior to that of an antimony salt flame retardant, the flame-retardant problem can be effectively solved under the condition that antimony resources are deficient, antimony-free flame-retardant products are realized, and the flame-retardant performance of the flame-retardant products is improved. Meanwhile, the preparation method has the characteristics of safety, low toxicity, low cost, wide raw material source, good dispersity and compatibility and the like, and has a wider application prospect.

This invention relates to the field of coatings, specifically to a water-based epoxy glass flake heavy-duty anti-corrosion coating and its preparation method, comprising 11.5-12.5 parts water, 1-1.2 parts dispersant, 0.5-0.6 parts wetting and defoaming agent, 0.2-0.3 parts defoamer, 1.1-1.2 parts anti-settling agent, 49-51 parts water-based epoxy resin dispersion, 3-3.4 parts rust-inhibiting pigment, 30-36.5 parts graded glass flakes; 9.8-10.2 parts water-based amine copolymer, 1.3-1.4 parts flash rust inhibitor, and 1.5-2.5 parts water. This anti-corrosion coating contains no solvents and has low VOCs. The anti-corrosion performance of the coating can be improved by adding two rust-inhibiting pigments and fillers: aluminum tripolyphosphate, zinc strontium phosphate, and glass flakes. Neutral salt spray and seawater immersion tests showed that the coating film did not bubble, rust, or peel after 12,000 hours of immersion.

The invention discloses a multi-stage filtering device for nuclear material pollution treatment and a method thereof, and relates to the field of nuclear waste. The multistage filtering device for nuclear material pollution control comprises a primary filtering tank, a chemical precipitation tank and an ion adsorption tank which are connected in sequence, compression type filtering pieces are arranged in the primary filtering tank and the chemical precipitation tank, and a resin column is installed on the ion adsorption tank. According to the multi-stage filtering device for nuclear material pollution control and the method thereof, impurities are intercepted through the flexible anti-radiation storage bag and the flexible filtering membrane in the primary filtering tank, strontium phosphate and cobalt in wastewater react through ferrous phosphate in the chemical precipitation tank to generate strontium phosphate and cobalt phosphate precipitates; the sediment is intercepted by utilizing the flexible filtering membrane, then the flexible anti-radiation storage bag is compressed and packaged, the interior of the equipment is not polluted in the process, the filtering consumable can be directly used as a nuclear solid waste packaging material, the subsequent treatment procedures are reduced, and the treatment cost is reduced.

The present application relates to the technical field of bone repair scaffold, in particular to a directional multifunctional bone repair scaffold prepared by pulling and folding method and a preparation method and application thereof. The directional multifunctional bone repair scaffold comprises a polycaprolactone-collagen mixture with a honeycomb-shaped micropore structure, and a strontium phosphate mineralization layer covering the surface of the polycaprolactone-collagen mixture. The honeycomb forming process of "sugar stove" is imitated, that is, the repeated stretching and folding of the semi-solid mixture can induce structural orientation and porosity without solvent or special equipment. In-situ mineralization with strontium apatite further enhances the bioactivity, and Sr 2+ Dual role in angiogenesis and osteogenesis. Systemic characterization confirms SrAP mineralization uniformity and interface stability. In vitro studies show that bone cell migration is increased by 1.37 times, and the expression of VEGFA / RUNX2 is up-regulated by 1.15 times / 121.26 times. Rat calvarial defect model shows that the bone regeneration rate is 50.85% at 6 weeks, and micro-CT and histological examination shows mature vascularized bone formation.