19 results about "Aragonite" patented technology

This invention provides aragonite- and calcite-based scaffolds for the repair, regeneration, enhancement of formation or a combination thereof of cartilage and / or bone, which scaffolds comprise at least two phases, wherein each phase differs in terms of its chemical content, or structure, kits comprising the same, processes for producing solid aragonite or calcite scaffolds and methods of use thereof.

The application belongs to the field of material chemistry, and particularly relates to a kind of one-side densification large-size biomimetic ceramic Janus film and a preparation method thereof.The Janus film is a two-layer structure composed of a dense layer and a loose layer, the dense layer is aragonite crystal, and the loose layer contains aragonite and calcite crystals.The application induces crystal densification growth by limited effect, does not need the extreme environment of high temperature and high pressure in traditional densification ceramic firing, successfully prepares one-side densification mineral film under mild experimental conditions, saves energy, and provides favorable conditions for subsequent mechanism research and expansion of synthesis method.

A method of making superhydrophobic concrete includes creating a mixture, wherein the mixture comprises aragonite and / or graphene, and heating the mixture to a temperature between 500° C. and 2,500° C. then drying the mixture, and, optionally, adding the mixture to concrete.

This invention provides a method for preparing high-purity aragonite-type calcium carbonate whiskers using electrolytic manganese slag. The method includes: adding tetrasodium IDS to the leachate of the electrolytic manganese slag, stirring and reacting to obtain an intermediate solution; the molar concentration ratio of tetrasodium IDS to manganese ions in the leachate is 1.2-2; slowly adding ammonia water to the intermediate solution while continuously introducing CO2 gas; after the reaction is complete, performing solid-liquid separation, drying the filter cake, and obtaining aragonite-type calcium carbonate whiskers. This invention uses electrolytic manganese slag as raw material to prepare high-value-added aragonite-type calcium carbonate whisker materials, achieving high-value utilization and full-component resource utilization while mitigating the environmental pollution caused by electrolytic manganese slag; this invention fully utilizes the soluble chemical components of electrolytic manganese slag while reducing production costs; and the entire preparation process is carried out at low temperature and normal pressure; the entire process generates no waste.

A method of making superhydrophobic concrete includes creating a mixture, wherein the mixture comprises aragonite and / or graphene, and heating the mixture to a temperature between 500° C. and 2,500° C., then drying the mixture, and, optionally, adding the mixture to concrete.

The application discloses a composite coating for low-carbon steel protection and a preparation method thereof, and belongs to the technical field of metal surface treatment and novel low-carbon building material. The composite coating comprises a low-carbon steel substrate and an inorganic transition layer formed by in-situ electrodeposition and directly attached to the surface of the substrate; the inorganic transition layer comprises a brucite layer and an aragonite layer generated by in-situ electrodeposition. The inorganic transition layer is combined with the low-carbon steel substrate through Fe-O-Mg covalent bonds, and the needle-shaped aragonite on the outer side of the inorganic transition layer can induce epitaxial growth of a subsequent functional coating, forming a component-interwoven interface transition zone. The preparation method adopts a step electrodeposition process, including a first stage of high current density deposition and a second stage of low current density deposition. The application realizes strong chemical combination and long-acting corrosion protection between the coating and the substrate by constructing a metal-inorganic connecting layer, and can be adapted to a calcium silicate carbonate cementitious material coating (preferably a gamma-C2S carbon mineralization coating) for metal corrosion protection.

This invention belongs to the fields of flue gas treatment and industrial solid waste resource utilization, specifically relating to the preparation of magnesium slag-based lightweight high-strength thermal insulation materials and a method for synergistic CO2 fixation. The method uses magnesium slag as raw material, adds cement, foaming agent, and foam stabilizer, and after grouting and molding, introduces carbon dioxide gas to carry out a mineralization reaction in a carbonization reactor to obtain a lightweight high-strength thermal insulation material. Through the control of process parameters, the prepared thermal insulation material contains abundant fibrous aragonite-type calcium carbonate with a large aspect ratio, which plays a supporting role in the strength of the thermal insulation material, with a maximum compressive strength of up to 11.89 MPa. The method of this invention involves a simple process, mild conditions, high CO2 mineralization efficiency, and is easily industrialized.

Compositions, methods, and uses of calcium carbonate-based composition are presented. The calcium carbonate-based composition includes a plurality of restructured calcium carbonate particles that has an average size of equal or less than 10 microns in diameter. Preferably, the calcium carbonate-based composition is generated by unstructuring the aragonite using an acid and a chelator and recrystallizing the unstructured aragonite in a customized form. Exemplary aragonite-based compositions include pavement compositions.

The invention discloses a subaudio frequency wave sterilization and scale inhibition device which comprises a subaudio frequency wave generator frequency modulation module. The frequency modulation module of the subaudio frequency wave generator generates subaudio frequency waves, the subaudio frequency waves are transmitted to the subaudio frequency wave composite function type rare earth new material processor through the cable, and the subaudio frequency wave composite function type rare earth new material processor forms a subaudio frequency alternating magnetic field. The solubility of calcium, magnesium and carbonate ions in water is enhanced through the subaudio alternating magnetic field, the dispersion effect similar to that of chemical agents is achieved, meanwhile, aragonite-shaped soft scale which is easily washed away by water is generated at the position where the temperature of the water side of the heat transfer surface of the equipment is high and carbonate scale is easily formed, and the scale inhibition effect is achieved; the subaudio alternating magnetic field further interferes ion balance, enzyme activity and living environment of microorganisms through an energy field, so that growth and reproduction of the microorganisms are inhibited, flora structures of the microorganisms are destroyed, the sterilization effect is achieved, sterilization and scale inhibition are not needed through drugs, and the environment friendliness is good.

Disclosed herein are micro-sized aragonite compositions and methods for enhancing calcium uptake and overall plant health. The disclosure provides calcium compositions comprising particles of aragonite, preferably oolitic aragonite, that are mechanically reduced to micron or sub-micron dimensions to generate a highly bioavailable, rapidly dissolving calcium source suitable for foliar or soil application. The compositions may be incorporated into liquid suspensions, granules, coated fertilizers, seed treatments, or nutrient delivery systems, and may optionally include biologically active agents, growth stimulants, humates, or surfactants to further promote uptake. Methods of using the compositions to treat calcium deficiency, strengthen cell walls, reduce blossom-end rot, increase stress tolerance, and improve yield are also provided.

Provided is a building material, comprising: a base material and an amount of aragonite, the aragonite optionally present at up to about 60 wt % of the total weight of the base material and the aragonite. The base material can include any one or more of a cementitious material, a clay, a biopolymer, gypsum, and lime. The disclosed materials are useful in manufacturing processes, including additive manufacturing and other construction processes.

A method of making superhydrophobic concrete includes creating a mixture, wherein the mixture comprises aragonite and / or graphene, and heating the mixture to a temperature between 500° C. and 2,500° C., then drying the mixture, and, optionally, adding the mixture to concrete.

Provided is a calcium-based carbonic acid compound for an inorganic molded article which, when used as an inorganic molded article of a building material, is capable of sufficiently reducing warpage or cracking when heated. This calcium-based carbonate compound for an inorganic molded article has a calcite-type crystal structure, an aragonite-type crystal structure, or a combination thereof, the aspect ratio of the average major axis to the average minor axis being 2-19, and the oil absorption being 40-90 mL / 100 g.

Compositions and methods are presented in which aragonite, and especially oolitic aragonite particles are used as infill material in an artificial turf structure or as sub-growth substrate for natural grass. Advantageously, oolitic aragonite particles provide: a superior microporous surface for effective water saturation to impart thermal control and environmental compatibility; ammonia neutralization of urine by reducing urea hydrolysis with the free calcium presented in the aragonite particles; and aragonite particle uniformity allowing for reduced compaction and desirable water draining.

The bypass flow water treatment equipment comprises a base and a treatment cavity, a mounting plate is fixedly connected to the upper portion of an inner cavity of the treatment cavity, a cathode generator is fixedly connected to the middle of one side of the mounting plate, and a cleaning mechanism used for cleaning the outer wall of the cathode generator is arranged on the outer wall of the cathode generator; the cleaning mechanism comprises a sleeve, a scraper and a second brush plate are arranged in an inner cavity of the sleeve, and a driving mechanism used for driving the cleaning mechanism to rotate is arranged in the middle of an inner cavity of the treatment cavity. A low-voltage superposition pulse electric field is applied through the anode generator and the cathode generator, calcium and magnesium ions in water are induced to form aragonite type calcium carbonate microcrystals easy to clean, scaling of pipelines and equipment is avoided from the source, and corrosion of the equipment in a circulating water system is reduced; after the scraper of the cleaning mechanism scrapes microcrystals on the outer wall of the cathode, the brush plate I and the brush plate II are matched to push back the microcrystals and capture the microcrystals in the sleeve, and the microcrystals are stopped from penetrating through the filter screen and entering the treatment cavity by combining with the filter screen interception of the through groove of the sleeve.

The invention discloses a method for preparing aragonite whiskers through high-speed CO2 flow field synergistic mineralization of solid waste and a product, and belongs to the technical field of solid waste recycling and inorganic functional material preparation. According to the method, industrial solid waste containing Ca < 2 + > and Mg < 2 + > serves as a raw material, the temperature is increased to be larger than or equal to 60 DEG C after leaching, a crystal form regulator and a dispersing agent are added, blowing mineralization is conducted on the solution through high-speed CO2 airflow, and oriented growth of the aragonite whiskers is achieved through the shear enhanced mass transfer effect of a flow field and the cooperative regulation effect of an additive. According to the method, the technical bottlenecks of low aragonite phase purity, easiness in whisker agglomeration and high raw material cost in traditional aragonite whisker preparation are overcome, a high-speed CO2 flow field is innovatively introduced into a solid waste mineralization system, and the CO2 mass transfer efficiency and whisker morphology controllability are remarkably improved.

The objective is to provide a method for producing functional nanomaterials, particularly calcium carbonate crystals having aragonite-like multilayer nanostructures, by controlling the biomineralization process. [Solution] We have demonstrated that the formation of calcium carbonate crystals can be controlled by culturing recombinant yeast or recombinant filamentous fungi, modified to express at least one protein derived from the mantle secretion of the mabe snail (Pteria penguin), in a medium containing calcium salts. By using recombinant yeast or recombinant filamentous fungi, multilayer nanostructure crystals can be produced.

The present application relates to a kind of carbonization 3D printing concrete mix design method and carbonization 3D printing concrete.The present application is introduced into carbon dioxide to cement-based printing slurry, controls its amount of introduction, while introducing carbon dioxide into cement-based printing slurry, according to the content of carbonation reaction product CaCO3, and the ratio of calcite and aragonite in the required concrete mixture, the amount of magnesium chloride is calculated, magnesium chloride and carbon dioxide are added into cement-based printing slurry at the same time, fully react, finally 3D printing concrete material is prepared.The present application improves the thixotropy of material by the addition of magnesium chloride, the generation of aragonite type calcium carbonate, the constructability of cement slurry is stronger, at the same time, the orientation of nanoscale aragonite fiber is arranged according to the printing direction, has excellent reinforcing and toughening effect, and the bending strength, bending strength and compressive strength are improved.

The invention discloses a sea urchin type aragonite whisker material prepared based on calcium-magnesium-based solid waste regulation and a method thereof, and belongs to the technical field of solid waste resource utilization. Through the synergistic effect of the calcium-based solid waste solution and the magnesium-based solid waste solution and under the specific technological parameters (pH = 6.2-7.0, the temperature of 60-90 DEG C, the CO2 concentration of 15-99% and the solid-to-liquid ratio of 1: (10-50), the reaction process is regulated and controlled, and the aragonite whisker material with the unique sea urchin morphology can be stably synthesized. The material is of a special structure in which needle-shaped aragonite whiskers with high length-diameter ratio at the outer part and active silica gel with high polymerization at the inner part coexist. The sea urchin type aragonite whisker material has extremely high specific surface area and pore volume, and shows excellent CO2 curing capacity and reaction activity; meanwhile, when the cement-based material is added as an admixture, the initial setting time can be remarkably shortened.