61 results about "Hydroxylapatite" patented technology

The invention discloses a crosslinked polyethylene insulated flame-retardant power cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer, an armor layer and an outer sheath layer from inside to outside, and is characterized in that the inner sheath layer or the outer sheath layer is obtained by respectively extruding a sheath material on the outer side of the shielding layer or the armor layer; the sheath material is prepared from the following raw materials: low-density polyethylene, high-density polyethylene, phosphate modified yttrium-graphene nano porous particles, hydroxyapatite porous nanorods, a cross-linking agent, an assistant cross-linking agent, an antioxidant and the like. The obtained power cable has excellent insulativity and flame retardance and has a good application prospect in the field of high-voltage power transmission.

The invention provides a method for solidifying heavy metal ions in lithium slag, and belongs to the technical field of solidified lithium slag treatment. The method for solidifying the heavy metal ions in the lithium slag comprises the steps that lithium slag powder is taken as a base material, sodium fluoride, silicon carbide, sodium tetraborate and hydroxyapatite are added into the base material for dry mixing, and mixed powder is obtained; adding deionized water into the mixed powder to prepare a spherical green body; drying the spherical green body to obtain a dried green body; and sintering the dried green body, and cooling to room temperature to obtain the cured lithium slag ceramsite. According to the method, pollution-free treatment of the lithium slag is achieved, meanwhile, the treatment process is simplified, environmental damage is reduced, and resource utilization of the lithium slag is improved.

The invention discloses an antibacterial bioactive glass composite material for skull defect repair and a preparation method thereof, and relates to the technical field of bioactive glass materials. The antibacterial bioactive glass composite material for skull defect repair is prepared from the following raw materials in parts by weight: 8 to 15 parts of collagen, 45 to 55 parts of bioactive glass, 20 to 30 parts of hydroxyapatite, 5 to 8 parts of a toughening agent, 1 to 2 parts of an antibacterial agent and 150 to 250 parts of deionized water. The antibacterial bioactive glass composite material for skull defect repair prepared by the invention has excellent bending strength and antibacterial property.

The invention belongs to the field of nano materials, and discloses a hydroxyapatite whisker / chitin whisker co-assembled liquid crystal as well as a preparation method and application thereof. The co-assembled liquid crystal is obtained by mixing hydroxyapatite whisker liquid crystal and chitin whisker liquid crystal which have the same electrical property, performing ultrasonic homogenization treatment and further stabilizing at room temperature. In a co-assembled liquid crystal system, the preparation and long-term stability of the co-assembled liquid crystal system are realized by two whiskers with the same electrical property based on a dual-drive principle of electrostatic repulsion and spatial orientation entropy; and the co-assembled liquid crystal simulates the liquid crystal phase and the ordered organic / inorganic phase composition in the living body in the nature in the organic / inorganic phase composition and the liquid crystal state. In addition, the adopted raw materials are wide in source and low in cost, the preparation process is simple, efficient and easy to implement, and no surfactant or dispersing agent is needed to stabilize the co-assembled liquid crystal system.

The present disclosure provides a method for solidifying heavy metal ions in lithium slag, belonging to the technical field of lithium slag treatment. The method for solidifying heavy metal ions in lithium slag comprises: taking lithium slag powder as a base material, adding sodium fluoride, silicon carbide, sodium tetraborate and hydroxyapatite to the base material for dry mixing to obtain a mixed powder; adding deionized water to the mixed powder to prepare a spherical green body; drying the spherical green body to obtain a dry green body; and performing sintering treatment on the dry green body, and cooling to room temperature to obtain solidified lithium slag ceramsite. The method realizes nuisance-free treatment of lithium slag, simplifies the treatment process, reduces environmental damage, and improves the resource utilization of lithium slag.

This invention discloses a method for depositing hydroxyapatite in a three-dimensional porous sample, comprising: S1, pretreatment of the three-dimensional porous sample; S2, placing the three-dimensional porous sample in an O... 2 In a plasma spraying apparatus; S3, prepare SBF1, immerse the sample treated in step S2 into SBF1, seal the container tightly, and place it in an incubator. After immersion in SBF1, remove the sample, wash and dry it. SBF1 contains the following components: CaCl2, MgCl2·6H2O, NaHCO3, K2HPO4·3H2O, Na2SO4, KCl, and NaCl; S4, prepare SBF2, immerse the sample treated in step S3 into SBF2, seal the container tightly, and place it in an incubator at 37°C. SBF2 contains the following components: NaCl, CaCl2, and K2HPO4·3H2O; S5, remove the sample, wash and dry it to obtain a three-dimensional porous sample with deposited hydroxyapatite. The method provided by this invention uniformly deposits HA in the porous three-dimensional void surface, and the composite interface can accelerate early bone healing, increase the integration of the bone implant surface with the bone, and promote the early stability of the implant.

Provided herein are chromatography media comprising a porous solid substrate (such as a membrane, a metal, or a metal alloy) coated with hydroxyapatite (HA). Also provided are chromatography media comprising the HA coated substrate, and uses thereof. Thus, the present disclosure provides chromatographic media comprising a porous solid substrate coated with HA, such as a membrane, metal, or metal alloy. Also provided are chromatography media comprising the HA coated substrate, and uses thereof. A method of preparing the HA coated substrate is also provided.

A chewable tablet a first probiotic strain of bacteria that inhibits Streptococcus mutans; a second probiotic strain of bacteria that inhibits one or more of Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia (i.e., the red complex); a remineralizing agent such as hydroxyapatite with a micron-level particle size; and a sugar alcohol such as xylitol.

The invention aims to provide a fully degradable full polylactic acid-based optical fiber pressure sensor, which comprises a base, a pressure-sensitive diaphragm and an optical fiber, and is characterized in that the base is a blend of polylactic acid and nano cellulose; the pressure-sensitive membrane is a blend of polylactic acid, nano cellulose and hydroxyapatite; the optical fiber core layer is made of high-purity polylactic acid, the cladding layer is made of a polylactic acid and polyhydroxyalkanoate blend, all components are made of polylactic acid degradable materials, secondary operation is avoided, performance and degradation balance is achieved through blending modification, the components are good in degradation synchronism, and therefore the stability of the sensor is guaranteed.

The application discloses an integrated hydroxyapatite photodisruption device based on vortex vector light field regulation technology, which utilizes vortex vector light field regulation technology and vector diffraction theory principles to realize efficient decomposition of hydroxyapatite in emergency, meets high requirements for speed and precision in surgery, avoids sample heating, and reduces operation complexity and danger. Compared with the prior art, the device is small in size, convenient to flexibly use in medical and cosmetic surgery, fills the blank in the key field, and adopts integrated optical technology to ensure the precision and stability of the system, and is suitable for large-scale application.

The invention provides a preparation method of high-purity hydroxyapatite dry powder. The preparation method comprises the following steps: mixing a hydroxyapatite precursor containing an impurity crystal phase with water to form a precursor solution; putting the precursor solution into a ball mill, grinding and dispersing to form slurry, putting the ground and dispersed slurry into a spray dryer, and crushing the slurry into hydroxyapatite particles and impurity crystal phase particles under the action of high-pressure airflow of the spray dryer; the hydroxyapatite particles and the impurity crystal phase particles are agglomerated in the falling process to form hydroxyapatite agglomerates and impurity crystal phase agglomerates with different particle sizes, and due to different particle sizes, the hydroxyapatite agglomerates and the impurity crystal phase agglomerates are separated, so that the high-purity hydroxyapatite dry powder is prepared; according to the method, impurity crystal phases can be removed, the product can be dried, and the high-purity hydroxyapatite dry powder is obtained and is convenient to store and apply.

The invention relates to the technical field of ultraviolet shielding materials, in particular to a preparation method of a dealkalized lignin / cerium-doped hydroxyapatite two-dimensional nanosheet composite material and ultraviolet shielding application of the dealkalized lignin / cerium-doped hydroxyapatite two-dimensional nanosheet composite material. The method comprises the following steps: firstly, preparing a dealkalized lignin nanosheet through ultrasonic treatment and freeze drying, then mixing cerous nitrate, calcium chloride and disodium hydrogen phosphate powder with water to prepare a solution, and then uniformly mixing the dealkalized lignin powder with the mixed solution for microwave hydrothermal reaction; the dealkalized lignin / cerium-doped hydroxyapatite two-dimensional nanosheet composite material is obtained through centrifugation and freeze drying, a band gap with good ultraviolet absorption is obtained, the dealkalized lignin / cerium-doped hydroxyapatite two-dimensional nanosheet composite material is applied to ultraviolet shielding, the good biocompatibility of hydroxyapatite is considered, and the ultraviolet shielding effect is also provided. The large flaky hydroxyapatite nanosheets are prepared by virtue of the template effect of the dealkalized lignin, so that the agglomeration of the dealkalized lignin nanosheets is effectively inhibited, and the anti-ultraviolet effect of the dealkalized lignin / cerium-doped hydroxyapatite two-dimensional composite material is synergistically improved.

The invention discloses self-cleaning titanium dioxide and a preparation method, the titanium dioxide sequentially comprises a titanium dioxide substrate, an inorganic coating layer and an organic coating layer from inside to outside; the inorganic film coating layer comprises an Al-doped hydroxyapatite film layer; the organic coating layer is obtained by performing organic modification by adopting organic acid. According to the preparation method, the Al-doped hydroxyapatite inorganic coating and the organic acid organic coating are comprehensively adopted for modification, so that the surface energy of the titanium dioxide is remarkably reduced, the contact angle is increased, and the self-cleaning capability of the titanium dioxide is improved. Meanwhile, the titanium dioxide provided by the invention also has excellent weather resistance, dispersibility and other pigment properties, and can meet the needs of self-cleaning products.

The present invention provides a treatment process for the synergistic sterilization and disinfection of industrial wastewater using chlorine dioxide, ozone and ultraviolet rays, which belongs to the field of water treatment technology and comprises the following steps: 1. filtering the industrial wastewater and performing preliminary precipitation; 2. transporting it to a biological contact oxidation tank, and transporting it to an inclined tube sedimentation tank after treatment for precipitation; 3. transporting it to a disinfection tank, injecting ozone, and irradiating it with an ultraviolet lamp at the same time; 4. transporting it to a purification tank, adding chlorine dioxide, and performing desalination treatment by a reverse osmosis composite membrane to finally obtain purified water. The present invention provides a treatment process for the synergistic sterilization and disinfection of industrial wastewater using chlorine dioxide, ozone and ultraviolet rays, which can effectively reduce the adverse effects of chlorine on the reverse osmosis composite membrane, and the reverse osmosis composite membrane is obtained by coating a hydroxyapatite-doped support layer with a carbon nanotube-modified polyaryl sulfide sulfone solution, and has good permeability and long-term stability.

The invention relates to the technical field of agricultural fertilizers, and discloses a compound fertilizer based on bioactive hydroxyapatite superfine powder and a preparation method thereof. According to the fertilizer, animal bone-derived hydroxyapatite superfine powder is taken as a core and is subjected to compound activation through zeolite, organic silicon and titanium dioxide, and multifunctional activated powder with a core-shell structure is formed. Then compounding the activated powder with algal polysaccharides, polyglutamic acid and trace elements containing zinc, boron and molybdenum under the action of a dispersing agent, and preparing a stable concentrated suspension through a high-pressure homogenization process; or further mixing with a bentonite carrier, and preparing into a granular fertilizer through a granulation process. Through an innovative composite activation process, efficient slow release and utilization of nutrients are realized, the fertilizer is endowed with multiple functions of degrading pesticide residues, passivating heavy metals and inhibiting pathogenic bacteria, and the fertilizer is cooperated with biostimulant, so that the yield and stress resistance of crops are remarkably improved.

The invention discloses a preparation method of high-purity superfine high-whiteness calcium carbonate, which belongs to the field of calcium carbonate preparation, and comprises the following steps: pretreating multiple raw materials such as dolomite, steel slag and the like, adding a composite sintering aid, calcining at 700-900 DEG C, and recovering and purifying carbon dioxide; carrying out ultrasonic-assisted leaching on the calcined product, reacting with magnesium chloride, and separating to obtain a high-purity calcium chloride solution; carrying out deep impurity removal on the impurity-containing magnesium hydroxide by using a composite chelating agent, introducing carbon dioxide to obtain a magnesium ion leaching solution, and regulating and crystallizing by using a biological template to obtain magnesium carbonate trihydrate; reacting with a calcium chloride solution under the action of a reducing agent, treating a product with a composite surface modifier, and spray-drying to obtain a product; according to the method, a composite chelating agent (EDTA disodium + nano-hydroxyapatite) + reduction synergistic purification (sodium sulfite + ascorbic acid) system is adopted, colored impurity ions such as Fe < 3 + > and Mn < 2 + > are removed in a targeted mode, the problem that traditional magnesium hydroxide is not thoroughly adsorbed is solved, and the whiteness of the product is improved.

The invention relates to the technical field of odorless environment-friendly asphalt materials, and discloses bionic odorless environment-friendly asphalt and a preparation method thereof. The asphalt material comprises matrix asphalt, an SBS modifier, bionic smoke control particles, thermal response microspheres containing a stabilizer and polyvinylidene fluoride. The bionic smoke control particle is of a shell-middle layer-inner core three-layer structure, the shell is formed by compounding chitosan and hydroxyapatite, the middle layer is a thermoplastic polymer, and the inner core is sulfydryl functional silica gel and foam silicate. The total volatile organic compound release amount is reduced by 51% compared with that of a pure 70 # matrix asphalt sample, and the total release reduction rate reaches 53.6%. Under irradiation for 30 minutes, the surface temperature is increased to 38.0 DEG C and is reduced by 20.2 DEG C compared with a pure 70 # matrix asphalt sample, and the heating rate is reduced by more than 60%. The asphalt is suitable for asphalt material application scenes needing smoke control and heat regulation such as roads and roofs.

The invention relates to a method in which xylitol is heated until liquified, to be added to hydroxyapatite and zinc citrate, the mixture subsequently being subjected to a process of controlled crystallisation. This produces crystals for dental care with active agents that maximise the bioactive effect of same in the mouth, the crystals also providing slow and controlled release of the active agents, thereby increasing effectiveness in comparison with conventional forms of application. In summary, the invention represents a significant advance in dental care technology. It not only improves the therapeutic efficacy of the hydroxyapatite and zinc citrate through innovative release technology, but also increases patient acceptance and environmental sustainability.

The application discloses a kind of alpha type high-strength gypsum and preparation method thereof, belong to alpha type high-strength gypsum preparation technical field, the preparation method of alpha type high-strength gypsum includes the following steps: after hydrothermal reaction treatment, gypsum raw material and crystal modifier are obtained;According to the percentage of the dry basis mass of gypsum raw material, the crystal modifier includes the following preparation raw materials: 0.03%~0.40% maleic acid-acrylic acid copolymer sodium salt, 0.05%~1.2% complexing agent, 0.01%~0.5% polycarboxylate superplasticizer, 0.01%~0.25% potassium chloride and 0.02%~0.8% hydroxyapatite micro powder.The crystal modifier of the application can accurately control the whole process of crystal growth and adapt to low-purity mixed gypsum raw material, so that the product crystal is short columnar and the aspect ratio is stable, and finally the alpha gypsum with high strength is obtained.

The present invention is directed to a cosmetic sunscreen composition comprising (a) at least one organic UV filter; (b) at least one polymer; (c) at least one surfactant; and (d) hydroxyapatite. The invention is also related to the use of hydroxyapatite for improving the SPF on cosmetic sunscreen compositions and the use of said cosmetic sunscreen composition.

Cosmetic Sunscreen Compositions, Use of Hydroxyapatite, and Use of a Cosmetic Sunscreen Composition. The present invention relates to a cosmetic sunscreen composition comprising (a) at least one organic UV filter; (b) at least one polymer; (c) at least one surfactant; and (d) hydroxyapatite. The invention also relates to the use of hydroxyapatite to improve the SPF of cosmetic sunscreen compositions and the use of said cosmetic sunscreen composition. Figure for abstract: none

The utility model belongs to aviation fluid conveying component technical field especially, it is a kind of airplane dry metal pipe, including the function inner layer, support intermediate layer and protective outer layer that are sequentially arranged from inside to outside, the function inner layer, support intermediate layer and protective outer layer are integrally formed by 3D printing technology, metallurgical combination is formed between each layer, the inner wall of function inner layer is coated with hydrophilic coating, the outer surface of protective outer layer is coated with oxidation-resistant coating. This airplane dry metal pipe, by setting function inner layer, improve dry efficiency and reliability double promotion, the honeycomb micropore (50-200 μm) of function inner layer and axial water guide groove form "adsorption-dredge" closed loop, cooperate hydroxyapatite hydrophilic coating, moisture adsorption rate is improved by more than 30%, humidity in pipe can be stably controlled below 5%, solve the technical problem that the existing dry metal pipe manufacturing process limit, function structure is difficult to integrate.

The present invention discloses a method for preparing and applying a tree-like structure nanofiltration membrane. The method first uses cellulose fiber filter paper as a substrate, in situ growing a hydroxyapatite nanowire array through a solvent thermal reaction; then the resulting composite filter paper is repeatedly immersed in an ethanol solution of trimesic acid and ferric chloride to obtain a tree-like structure nanofiltration membrane through continuous deposition. Compared to conventional nanofiltration membranes, the tree-like structure nanofiltration membrane of the present invention has greater surface roughness and a higher specific surface area, and is therefore more resistant to anionic / cationic dyes and heavy metal Pb. 2+ The ions all showed extremely high retention rates (>94%), with excellent environmental benefits.

The invention discloses a fabric with a black core wire coated with flame-retardant PVC (polyvinyl chloride) and a preparation method of the fabric, and belongs to the technical field of sunshade fabrics. Comprising the following steps: uniformly mixing modified PVC resin and an auxiliary agent, heating to a molten state, coating a black core wire, carrying out water-cooling curing molding, and carrying out warp and weft weaving processing to obtain the flame-retardant PVC-coated black core wire fabric, fluorinated silicon dioxide with a hydrophobic structure is grafted on the carbon nano tube, so that the thermal stability of polyvinyl chloride is obviously improved; the carbon nanotubes are coated with hydroxyapatite, so that an accelerated transmission path of combustible gas and a molten mass is blocked; according to the preparation method, hydroxyapatite is subjected to surface carboxylation treatment and then esterified with 4-chlorostyrene, and hydroxyapatite coated carbon nanotubes are grafted on polyvinyl chloride molecular chains in the vinyl chloride polymerization process, so that the interfacial compatibility between the carbon nanotubes and polyvinyl chloride is improved, and the tensile property of polyvinyl chloride resin is improved.

The application discloses a high-activity, high-selectivity, low-price and non-toxic photo-thermal catalytic reduction carbon dioxide catalyst, and relates to the technical field of catalysts.The photo-thermal catalytic reduction carbon dioxide catalyst is composed of tricobalt tetroxide and hydroxyapatite, the tricobalt tetroxide is loaded on the surface of the hydroxyapatite, and a solid hindered Lewis acid-base pair catalyst cobalt-hydroxyapatite is formed.The low cost, low toxicity, stability and scalability of the photo-thermal catalytic reduction carbon dioxide catalyst Co-HAP make it a very promising candidate for large-scale carbon dioxide reduction, the synthesized material can be sold commercially as an industrial RWGS photocatalytic product, the discovery of the feasible catalyst material is a key step for the carbon dioxide catalysis, and further development of the catalyst material will have a great influence, especially in the aspects of climate change and renewable energy technology.

The present invention relates to a composition or material, in particular a catalytically active composition or material, comprising - permanently polarized hydroxyapatite and - vaterite and / or vaterite-like material. Further, the present invention relates to a method for producing said composition or material, a composition or material obtained or obtainable by said method and the use of said composition or material.

The present invention relates to a hydroxyapatite-supporting porous silica particle, in which hydroxyapatite is supported on a surface a spherical porous silica particle and inner surfaces of pores of the spherical porous silica particle, and in which the hydroxyapatite-supporting porous silica particle has a circularity of 0.760 or larger, a method for producing the hydroxyapatite-supporting porous silica particles, and a composition containing the hydroxyapatite-supporting porous silica particle.

The invention relates to the technical field of materials, in particular to a hydrothermal reaction system of nanofibers as well as a preparation method and application of the hydrothermal reaction system. The reaction system comprises: a calcium source containing calcium ions; a phosphorus source containing phosphorus ions; a doping source containing lanthanum ions; the invention discloses a structure-directing agent capable of being selectively adsorbed on a hydroxyapatite crystal face under an alkaline condition and inducing one-dimensional directional growth. And an alkaline regulator. According to the preparation method disclosed by the invention, crystallization growth is directly carried out under a hydrothermal condition, and a high-temperature calcination step is not needed, so that the problems of fiber breakage, fusion and morphology collapse caused by macromolecular template decomposition and rapid crystal sintering are fundamentally avoided. The prepared nanofiber has ideal morphology with good continuity, uniform diameter and high length-diameter ratio, and can simulate the microstructure of natural collagen fiber more truly, thereby providing a more excellent biological microenvironment for cells.

The invention relates to the technical field of high polymer materials, in particular to a low-frequency response degradable self-reinforced piezoelectric composite material and a preparation method thereof. The self-reinforced piezoelectric composite material is prepared from the following components: stereocomplex polylactic acid and hydroxyapatite, the content of the hydroxyapatite is 5-30 wt% of the content of the stereocomplex polylactic acid; the low-frequency response degradable self-reinforced piezoelectric composite material has a mesoporous structure. The crystal of the degradable self-reinforced piezoelectric composite material with low-frequency response is a 100% stereocomplex crystal, and has excellent piezoelectric property.