1201 results about "Hydroxyapatites" patented technology

The invention discloses a microbial compound bacterial fertilizer for improving saline alkali soil and increasing the acting yield. A preparation method of the microbial compound bacterial fertilizer comprises the following steps: preparing a microbial agent containing phosphate-solubilizing bacteria, potassium-solubilizing bacteria, nitrogen-fixing bacteria, bacillus subtilis and actinomycetes; the preparation method comprises the following steps: preparing a sodium alginate solution, adding nano-hydroxyapatite and a microbial agent, uniformly mixing, dropwise adding a calcium chloride solution, and embedding an inner layer to obtain microbial embedded particles; uniformly mixing biochar, humic acid and attapulgite, taking a 2-3% HPMC solution as a binder, and carrying out middle-layer coating, so as to obtain prefabricated microbial fertilizer particles; and coating the chitosan-sodium alginate-nano ZnO outer layer to obtain the microbial compound bacterial fertilizer. The microbial compound bacterial fertilizer disclosed by the invention adopts a multi-layer and multifunctional collaborative design concept, realizes efficient protection and slow release of functional microorganisms in a saline-alkali environment, remarkably improves the physicochemical properties of soil and promotes the growth of crops.

Hydrogel comprises hydroxyapatite nanowires and a base material for forming the hydrogel, and further comprises glucose oxidase (GOx), gallic acid, magnesium ions (Mg < 2 + >) and the like, the gallic acid and the Mg < 2 + > form Mg-MOF, and the GOx is loaded on the Mg-MOF, so that the diabetes microenvironment of a bone defect part is locally adjusted, and bone defect repair is facilitated. Through verification, the sustained-release gallic acid of GOx-MOF participates in cascade reaction, GOx is removed to generate H2O2, the benefit is maximized, and the sustained-release gallic acid has good effects of controlling blood glucose, removing ROS, regulating inflammation and promoting osteogenesis and angiogenesis. The research is expected to play a role in microenvironment regulation of diabetes mellitus bone regeneration and minimally invasive treatment of bone defects.

The present invention relates to the field of biomedicine technology, specifically a preparation method of a silk fibroin hyaluronic acid filler for injection. The present invention concentrates a silk fibroin solution to obtain a concentrated silk fibroin solution, and then dilutes it to obtain a diluted silk fibroin solution; the diluted silk fibroin solution is heated to form a silk fibroin gel, granulated to obtain silk fibroin gel particles; 1,4-butanediol diglycidyl ether and a sodium hydroxide solution are mixed uniformly, hyaluronic acid and 1 / 3 of the mass fraction of hydroxyapatite are added, after stirring uniformly, swelling, purification and granulation are carried out, and the remaining mass fraction of hydroxyapatite is added to obtain composite gel particles; the composite gel particles and the silk fibroin gel particles are mixed uniformly, added to the gel to mix, and a silk fibroin hyaluronic acid filler is obtained, which effectively prolongs its degradation time.

The invention belongs to the technical field of soil fertilizers, and particularly relates to a soil conditioner and a preparation method thereof. Wherein the soil conditioner is prepared from the following raw materials in parts by weight: 30 to 40 parts of modified charcoal, 20 to 30 parts of microbial complexing agent, 15 to 25 parts of humic acid and 1 to 5 parts of biological enzyme; according to the microbial complexing agent, dopamine grafted and modified nano silicon dioxide and hydroxyapatite form a composite shell, pseudomonas aeruginosa and bacillus subtilis are wrapped, and the microbial complexing agent has the functions of protecting microorganisms, adsorbing heavy metals and slowly releasing phosphorus elements; the modified biochar is compounded with the attapulgite through acid-base treatment to form a porous structure with physical inlaying and chemical functional groups synergistic, so that the adsorption and fixation capability on heavy metals and organic pollutants is remarkably improved; the biological enzyme accelerates organic phosphorus conversion, and enzymatic hydrolysate provides a phosphorus source for microorganisms, promotes microorganism breeding, effectively increases the content of available phosphorus in soil, and enhances the stability of a remediation system.

The invention relates to the technical field of fertilizer preparation, and discloses an ecological balance fertilizer for yield increase and disease resistance of peanuts and a preparation method of the ecological balance fertilizer. The preparation process comprises the following steps: constructing a PLGA core containing trichoderma harzianum spores and magnesium carbonate through a micro-fluidic chip low-temperature water-in-oil emulsion method; coating bacillus amyloliquefaciens and potassium silicate with ultraviolet-induced cross-linked temperature-sensitive hydrogel to form a middle layer; loading rhizobium by using aminated mesoporous S < iO2 >, and spraying and assembling an enzyme response shell through a fluidized bed; finally, the hydroxyapatite nanorod and a binder are combined and granulated and formed through a fluidized bed. Precise controlled release of functional bacteria and nutrients is realized by constructing a temperature-sensitive-enzyme response type release system, and the activity of a fungicide is guaranteed to be preserved by virtue of trichoderma harzianum-rhizobium synergistic interaction and silicon bond linkage soil remediation in combination with a low-temperature fluidized bed process, so that a'fertilizer-bacterium-soil 'ecological cycle system is finally constructed.

The invention discloses bone cement for orthopedic repair and a preparation method thereof, and relates to the technical field of bone cement. The bone cement for orthopedic repair comprises solid-phase powder and a liquid-phase component, the solid-phase powder comprises the following components in parts by weight: 55-65 parts of composite calcium phosphate, 10-15 parts of bioactive glass, 2-3 parts of a developing agent, 1-2 parts of hydroxyapatite, 8-12 parts of a modified toughening agent and 2-3 parts of nano cellulose fibers; the liquid phase component is prepared from the following components in parts by weight: 40 to 50 parts of a sodium alginate solution, 10 to 20 parts of methacrylated gelatin, 0.5 to 1 part of transglutaminase, 30 to 60 parts of a citric acid buffer solution and 1 to 2 parts of an antibacterial agent. The preparation method comprises the following steps: reacting pentaerythritol with 12-oxododecanoic acid to obtain an intermediate 1, and reacting the intermediate 1 with dopamine to prepare the modified toughening agent. The bone cement for orthopedic repair prepared by the invention has good mechanical, self-repairing and antibacterial properties.

The invention belongs to the field of biomedical materials, and particularly discloses a preparation method and application of a 3D printing porous composite scaffold. I-type collagen and silk fibroin composite gel is modified on a 3D printing three-element doped hydroxyapatite / polycaprolactone (PCL) composite scaffold with a polydopamine coating, the three-element doped hydroxyapatite is synthesized by using a chemical precipitation method, and Mg < 2 + >, Sr < 2 + > and SeO3 < 2-> ions are doped in crystal lattices. The 3D printing porous composite scaffold provided by the invention effectively simulates the structure and function of soft and hard combination of natural bones, is helpful for regulating and controlling the stem cell fate to improve the bone regeneration process, repairs bone defects while eliminating tumors, and can be applied to bone defect repair or osteosarcoma treatment.

The invention relates to the technical field of microorganisms, in particular to a viable bacterium preparation of a lactobacillus paracasei strain as well as a preparation method and application of the viable bacterium preparation. The viable bacterium preparation comprises a lactobacillus paracasei strain and auxiliary materials, and the preservation number of the lactobacillus paracasei strain is CGMCC (China General Microbiological Culture Collection Center) No.27974. The viable bacterium preparation can inhibit the growth of streptococcus mutans, reduce the formation of a dental plaque biofilm caused by the streptococcus mutans, reduce the content of a mature dental plaque biofilm, inhibit the level of water-insoluble exopolysaccharides generated by the streptococcus mutans, reduce the expression quantity of cariogenic genes gtfB, gtfC, gtfD, ftf and LuxS of the streptococcus mutans, improve the cariogenic activity of the streptococcus mutans and improve the cariogenic activity of the streptococcus mutans. The adhesion rate of streptococcus mutans on a hydroxyapatite tooth model is reduced, and a beneficial in-vitro probiotic function is achieved.

An advanced defluoridation agent and a method for removing fluoride ion in fluorine-containing wastewater are provided. The advanced defluoridation agent includes 40-70wt% of polyaluminum sulfate, 0.3-30wt% of hydroxyapatite and deionized water supplemented to 100wt%. Using the advanced defluoridation agent of the present disclosure to treat fluoride-containing wastewater can achieve increased defluorination efficiency, reduced electrical conductivity, and reduced sludge content, and a better defluorination effect. The concentration of fluoride ions is lower than 15ppm after using the advanced defluoridation agent of the present disclosure.

An advanced defluoridation agent and a method for removing fluoride ions in fluorine-containing wastewater are provided. The advanced defluoridation agent includes 40-70 wt % of polyaluminum sulfate, 0.3-30 wt % of hydroxyapatite and deionized water supplemented to 100 wt %. Using the advanced defluoridation agent of the present disclosure to treat fluoride-containing wastewater can achieve increased defluorination efficiency, reduced electrical conductivity, and reduced sludge content, and a better defluorination effect. The concentration of fluoride ions is lower than 15 ppm after using the advanced defluoridation agent of the present disclosure.

The invention discloses injectable cross-linked hyaluronic acid gel containing hydroxyapatite microspheres as well as a preparation method and application of the injectable cross-linked hyaluronic acid gel containing the hydroxyapatite microspheres, and the preparation method comprises the following steps: step 1, adding a cross-linking agent and the hydroxyapatite microspheres with the crystallinity of 60-90% into a hyaluronic acid HA solution, cross-linking to obtain composite gel, and cutting the composite gel through a 60-100-mesh screen to obtain large gel particles; 2, a cross-linking agent and hydroxyapatite microspheres with the crystallinity being 30%-60% are added into the HA solution, composite gel is obtained after cross-linking, and the composite gel is cut through a 140-200-mesh screen to obtain small gel particles; and step 3, adding the large gel particles and the small gel particles into the non-crosslinked HA solution, and uniformly mixing to obtain the injectable crosslinked hyaluronic acid gel containing the hydroxyapatite microspheres. The composite gel obtained by the invention has a continuous collagen regeneration promoting effect, the in-vivo effect maintenance time is prolonged, and the composite gel has an excellent soft tissue filling and repairing effect.

The invention relates to the field of anticorrosive paint, in particular to anticorrosive paint containing lanthanum cerium oxide and a preparation method of the anticorrosive paint. The invention relates to an anticorrosive coating containing lanthanum cerium oxide. The anticorrosive coating is prepared from the following raw materials: 28 to 45 parts of ultraviolet stable composite film forming matter, 5 to 10 parts of composite rare earth filler, 6 to 12 parts of supported synergistic antirust agent, 18 to 30 parts of mixed solvent, 0.8 to 2.5 parts of dispersing agent, 2.7 to 5.3 parts of functional additive and 0.5 to 1.2 parts of nano montmorillonite, the composite rare earth filler is lanthanum cerium oxide-hydroxyapatite composite powder with a core-shell structure, wherein lanthanum cerium oxide is used as a core, hydroxyapatite is used as a shell, and the thickness of the shell layer is 10-20 nm; the ultraviolet stable composite film forming substance comprises epoxy resin and ultraviolet grafting modified polyurethane in a weight ratio of 1: (0.6-2.2); the supported synergistic antirust agent is a mixture of mesoporous silica supported benzotriazole and zinc molybdate. And the obtained coating is high in adhesive force and long in service life.

The invention belongs to the technical field of medical cosmetology and plastic surgery, and particularly relates to a hydroxyapatite microsphere facial skin filling agent for injection and a preparation method thereof. Hydroxyapatite microspheres and sodium hyaluronate are uniformly mixed, a cross-linking agent is added, and cross-linked sodium hyaluronate-hydroxyapatite core-shell structure microsphere particles which take hydroxyapatite microspheres as cores and cross-linked sodium hyaluronate as shells and are of a soft-in-hard structure can be obtained through dialysis and particle grading. The cross-linked sodium hyaluronate is used as a core-shell structure, so that the hydroxyapatite is locked in the cross-linked sodium hyaluronate, agglomeration is effectively avoided, the extrusion resistance can be well reduced by the soft-wrapped-hard core-shell structure, and the propulsive force is smaller. All the components in the hydroxyapatite microsphere facial skin filler for injection have better biocompatibility, so that the rejection of the filler in a body is reduced, and the skin problems of allergy, redness, swelling, small lumps and the like after injection and filling are effectively avoided.

The invention relates to the technical field of cables, and provides a tensile new energy charging pile cable which comprises a conductor, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside. The sheath layer comprises the following components in parts by weight: 60-70 parts of chlorinated polyethylene, 15-20 parts of polyisoprene, 5-10 parts of an ethylene-methyl methacrylate copolymer, 8-18 parts of an acrylonitrile-butadiene-styrene copolymer, 20-30 parts of modified hydroxyapatite, 1-5 parts of a lubricant, 3-6 parts of a plasticizer, 30-40 parts of a flame retardant and 1-3 parts of an antioxidant; the raw materials of the modified hydroxyapatite comprise hydroxyapatite and a modifier; the modifier comprises maleic acid-acrylic acid copolymer sodium salt; the weight ratio of the hydroxyapatite to the modifier is 45: (1-7). According to the technical scheme, the problem that the cable sheath layer of the new energy charging pile is poor in tensile property and corrosion resistance in the prior art is solved.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention discloses high-performance modified calcium carbonate and application thereof in a breathable film. The modified calcium carbonate is prepared by combining a three-element composite modification system composed of stearic acid, titanate and a silane coupling agent with a disc-nest mill three-stage gradient grinding process and antibacterial-hydrophobic dual-functionalization treatment of silver-loaded hydroxyapatite and a fluorinated modifier. The indexes of the prepared modified calcium carbonate are as follows: the median particle size (D50) is 1.8-2.2 mu m, the particle size (D97) of 97% particles is less than 6.5 mu m, the particles with the particle size of 1-5 mu m account for more than 60%, and the particles with the particle size of more than 10 mu m are less than 100 ppm; the content of calcium carbonate exceeds 97%, and the content of harmful impurities such as Fe is less than 200ppm; the whiteness is higher than 95; the oil absorption value is less than 12.5%, and the water content is less than 0.18%. When the composite material is applied to the breathable film in the medical field, the mechanical property, the antibacterial property and the hydrophobic property of the breathable film can be remarkably improved, the special requirements of the medical field on the breathable film are effectively met, and the composite material has good application prospects and industrial value.

The invention relates to a self-generating interbody fusion cage and a preparation method thereof, the interbody fusion cage comprises a porous tantalum support and bioactive piezoelectric ceramic arranged on the porous tantalum support, and the bioactive piezoelectric ceramic comprises hydroxyapatite and barium titanate; the preparation method comprises the following steps that the porous tantalum support is obtained through 3D printing, assembling positions of the bioactive piezoelectric ceramics are reserved on the upper surface and the lower surface of the porous tantalum support, the bioactive piezoelectric ceramics are embedded into the assembling positions of the upper surface and the lower surface of the porous tantalum support, and the weight ratio of barium titanate to hydroxyapatite is (92-98): (2-8). Compared with the prior art, the vertebral fusion cage has the advantages of promoting vertebral fusion by utilizing mechanical force in a human body to generate electricity, matching mechanical properties of a contact surface of the fusion cage, providing osteogenesis related ions, being relatively good in interface combination and the like.

The invention relates to the technical field of biomedical materials, and discloses a high-stability porous hydroxyapatite microsphere as well as a preparation method and application thereof, and the porous hydroxyapatite microsphere is formed by self-assembling nano-scale hydroxyapatite particles under the driving of a thermodynamic behavior of reducing excess surface free energy; the porous hydroxyapatite microspheres are nano-scale to micron-scale microspheres with rough surfaces; the porous hydroxyapatite microspheres have a nano-scale pore channel structure; the mineralization is improved under the assistance of the porous hydroxyapatite microspheres; the defects that hydroxyapatite microspheres in the prior art are sharp in microstructure, poor in histocompatibility, free of a porous structure and the like are overcome, the preparation method is simple, the safety coefficient of the production process is high, the obtained porous microspheres are stable in structure, various parameters can be adjusted according to requirements, and the method is suitable for industrial large-scale production.

The invention discloses an implantable absorbable PLA composite material and a preparation method thereof, and relates to the technical field of medical materials. The implantable absorbable PLA composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of PLA, 5 to 10 parts of poly (lactic-co-glycolic acid), 8 to 12 parts of polycaprolactone, 5 to 8 parts of modified hydroxyapatite, 2 to 3 parts of a toughening agent and 0.2 to 0.6 part of an antioxidant, the toughening agent is prepared by the following steps: reacting hydroxyethyl methylacrylate with ethylenediamine to prepare a four-arm compound, reacting the four-arm compound with 1-chloro-4-isocyanatobutane to prepare an isocyanate compound, and finally reacting the isocyanate compound with polyethylene glycol. The implantable absorbable PLA composite material prepared by the invention has excellent tensile property and impact resistance, and can meet the application requirements of clinical medical treatment.

The invention relates to the field of fiber production, and particularly discloses a zinc oxide antibacterial ES fiber and a preparation method thereof. The zinc oxide antibacterial ES fiber comprises a core layer and a surface layer, and the surface layer comprises the following raw materials in parts by weight: 80-100 parts of polyethylene, 2-5 parts of a nano-zinc oxide composite material, 1-2 parts of a dispersing agent and 2-3 parts of a compatilizer; the nano-zinc oxide composite material is prepared from hydroxyapatite nanowires, a polyethylene glycol solution and coated nano-zinc oxide in a mass ratio of 1: (8-10): (1.5-2); the preparation method comprises the following steps: melting the material of the core layer to obtain a melt; mixing polyethylene, the nano-zinc oxide composite material, a dispersing agent and a compatilizer, and melting to obtain a polyethylene melt; and mixing the melt and the polyethylene melt, spinning, bundling, stretching, carrying out heat setting, curling and cutting off to obtain a finished product, the fiber has the advantages of being good in antibacterial property, high in mechanical strength, good in spinning stability and good in air permeability.

The invention discloses a bone repair material based on pH controlled release and a preparation method thereof. The bone repair material comprises the following raw materials: polycaprolactone, nano hydroxyapatite and nano magnesium oxide. The composite bone repair scaffold has the beneficial effects that the composite bone repair scaffold with excellent biocompatibility, excellent osteogenesis performance, excellent degradation performance and pH controlled release of magnesium ions is prepared by printing the bone repair material through a 3D printing technology, a temporary three-dimensional structure can be provided for cells, cell adhesion, proliferation and differentiation are promoted, growth factors are released at the same time, and the growth rate of the cells is increased. The formation of new bone tissues is guided; the composite bone repair scaffold can continuously and quantitatively release magnesium ions through pH value control, when osteoarthritis or bone tissue inflammation occurs at a bone defect part due to improper operation and rejection reaction, the magnesium ion release speed of the composite bone repair scaffold is increased, the anti-inflammatory effect is achieved, and the magnesium ions which are continuously released can promote bone tissue repair.

The invention discloses a tooth repair composition containing mesoporous hydroxyapatite, a tooth repair product and a preparation method and application of the tooth repair composition and the tooth repair product. The tooth repair composition comprises nano-hydroxyapatite, fluoride and a chelating agent, the logarithm value logK of the stability constant K of the chelating agent to calcium ions is 1 < = logK < = 5, and K is measured in an aqueous solution with the temperature of 25 DEG C, the pH value of 7.0 and the ionic strength of 0.1 M; the nano-hydroxyapatite is prepared from nano-scale mesoporous hydroxyapatite, and the nano-hydroxyapatite contains nano-scale mesoporous hydroxyapatite. By adding the specific chelating agent, dynamic balance is formed in the tooth repairing composition, slow release protection can be formed on free calcium ions, the double inactivation effect possibly occurring when hydroxyapatite and fluoride exist at the same time is effectively avoided, the synergistic repairing effect of hydroxyapatite and fluoride is fully exerted, and the tooth repairing effect is improved. The use of fluorides can be greatly reduced, and safety and reliability are achieved.

The invention provides an additive composition containing a bioactive enzyme and a preparation method of the additive composition, and belongs to the technical field of biological enzymes. The preparation method comprises the following steps: fixing phytic acid and cyclodextrin on hydroxyapatite, modifying with tannic acid, reacting with dithiothreitol modified lysozyme to prepare an immobilized compound, adding 2, 2-dimethoxy-2-phenylacetophenone and methyl methacrylate, and carrying out irradiation reaction with an ultraviolet lamp to prepare the additive composition containing the bioactive enzyme. The broad-spectrum antibacterial property and the antiviral property of the lysozyme are greatly improved, the sterilization effect on gram negative bacteria is obviously improved, meanwhile, the stability of enzyme is greatly improved, the enzyme is not prone to inactivation, the preservation time of the enzyme is prolonged, the application effect of the enzyme is widened, meanwhile, the lysozyme has good killing capacity on oral bacteria and viruses, the addition of preservatives is reduced, and the cost is reduced. The cleaning effect and stability of the product are improved, tooth demineralization can be prevented, decayed teeth can be prevented, and wide application prospects are achieved.

The invention relates to the field of high-entropy alloys, in particular to a performance regulation and control method for a hole structure of a laser 3D printing high-entropy alloy stent, which comprises the following steps: step 1, component design and mechanical property research of a medical high-entropy alloy; 2, regulating and controlling the pore structure and the performance of the laser 3D printing high-entropy alloy stent; 3, preparation of the hydroxyapatite / high-entropy alloy composite material and biocompatibility evaluation.The method has the following beneficial effects that on the basis of deep understanding of physical and chemical changes designed in the laser 3D printing technology, a correlation mechanism between technological parameters and a macro / microstructure is established; precise control over the pore structure of the key metal component high-entropy alloy material is achieved, calculation is conducted in combination with the first principle, the component optimization theory of the key metal high-entropy alloy material with the human body implantation biological material as the application target is established, and on-demand preparation of the high-entropy alloy material with high strength, high hardness and low elastic modulus is achieved.

The invention relates to the field of environment, phosphorite resource utilization and agricultural biotechnology, in particular to a phosphate ore-containing phosphate-solubilizing bacterial agent, a preparation method thereof, a biological bacterial fertilizer and application, the phosphate ore-containing phosphate-solubilizing bacterial agent comprises phosphate-solubilizing bacteria, hydroxyapatite and a culture medium, and the phosphate-solubilizing bacteria are enterobacter hormaechei HS-6. The hydroxyapatite is used for preparing the phosphate ore-containing phosphate-solubilizing bacterial agent, so that the phosphate ore resource can be greatly promoted to be fully utilized, and the dissolution of insoluble phosphorus in the phosphate ore is realized. According to the phosphate-containing ore phosphate-solubilizing bacterial agent, the enterobacter hormaechei HS-6 is combined with the hydroxyapatite, so that the phosphate-solubilizing capacity of the enterobacter hormaechei HS-6 can be utilized, and the phosphorus resource of the hydroxyapatite can be fully utilized. The phosphate-containing ore phosphate-solubilizing bacterial agent has good prospects in application to preparation of biological bacterial fertilizer, application to agricultural soil improvement, application to phosphate ore resource recovery and application to promotion of wheat growth.

The present invention relates to a composition capable of improving the sunscreen performance of a sunscreen, and a preparation method and application thereof. The preparation method of the composition capable of improving the sunscreen performance of a sunscreen comprises the following steps: mixing and dissolving a metal ion salt and silk fibroin in water to obtain a silk fibroin metal ion complex solution; mixing the silk fibroin metal ion complex solution with hydroxyapatite to obtain a hydroxyapatite silk fibroin metal ion mixed solution; mixing the hydroxyapatite silk fibroin metal ion mixed solution with sericin to obtain the composition capable of improving the sunscreen performance of a sunscreen. The composition has excellent ultraviolet absorption performance, can be compatible with chemical sunscreens, improve the sunscreen performance of the sunscreen, and can avoid direct contact between the chemical sunscreen and the skin, thereby reducing the sensitization and skin irritation of the chemical sunscreen.

The invention relates to the technical field of corrosion inhibitors, in particular to a preparation process of an ionic liquid corrosion inhibitor for oil fields, which comprises the following raw materials in percentage by weight: 12-14% of corrosion inhibition loaded ionic liquid, 18-22% of scale inhibition loaded ionic liquid, 10-15% of surfactant, 3-5% of ethylene glycol and the balance of water. Meanwhile, the ionic liquid is loaded on the calcium-based montmorillonite and the composite hydroxyapatite, so that the corrosion and scale inhibition capacity of the corrosion inhibitor is further improved, and meanwhile, the problem that the release of the ionic liquid corrosion inhibitor in an oil field is uncontrollable is avoided; therefore, the ionic liquid corrosion inhibitor can effectively exert good corrosion and scale inhibition capability.

The invention relates to the field of biomedical textile materials, and discloses a partially absorbable sports medicine orthopedic suture line and a preparation method thereof.The suture line is prepared from, by mass, 50%-90% of polylactic acid and 10%-20% of polyglycolic acid. The mass content of polyglycolic acid is 10%-50%, the composite material further comprises a bioactive component, the mass content of the bioactive component is 0.1%-10%, the bioactive component comprises bone morphogenetic protein, silver nanoparticles and hydroxyapatite, the tensile strength of the suture line is 30-120 MPa, and under different physiological conditions, the suture line is not prone to fracture, and the suture line is not prone to fracture. And the degradation product can be compatible with surrounding tissues. The shape of the suture line can be automatically adjusted at the physiological temperature by embedding the shape memory alloy, and the suture line can adapt to dynamic changes of the tissue and provide uniform tension and support when interacting with the biological tissue due to the intelligent response capability, so that the tissue healing is effectively promoted.

The invention discloses a natural plant-based spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the natural plant-based spinning yarn is prepared, palm fibers are pretreated with a sodium chlorite solution and a sodium hydroxide solution, and pretreated palm fibers are prepared; reacting the pretreated palm fibers with ammonium dihydrogen phosphate to prepare phosphorylated modified palm fibers; reacting the phosphorylated modified palm fibers with calcium nitrate, diammonium hydrogen phosphate and allylphosphonic acid to grow hydroxyapatite in situ, so as to prepare hydroxyapatite composite palm fibers; 4-allyl thiosemicarbazide reacts with salicylaldehyde to prepare an antibacterial agent intermediate, and the antibacterial agent intermediate is complexed with copper ions to prepare an antibacterial agent; grafting an antibacterial agent and an anti-aging agent on the hydroxyapatite composite palm fibers to prepare modified palm fibers; and spinning the modified palm fiber to obtain the natural plant-based spun yarn. The prepared natural plant-based spinning yarn has the advantages of being high in breaking strength, antibacterial, flame-retardant and anti-aging.

The invention relates to the technical field of scale inhibition materials, in particular to a slowly-dissolved micro-nano dispersion scale inhibition material and a preparation method thereof. The composite material comprises a four-layer structure, wherein a porous hydroxyapatite core anchors DTPMP through phosphate radical vacancy to inhibit burst release; sulfonated polyetheretherketone and a cross-linking agent are compounded to form an ion selective controlled release layer, and the diffusion rate of the scale inhibitor is regulated and controlled; photo-thermal conversion graphene quantum dots are embedded in a temperature-sensitive hydrogel shell, and dynamic release is triggered through temperature or Ca < 2 + > concentration; and the corrosion resistance and the mechanical stability are enhanced by the atomic layer deposited ceramic layer and the epoxy resin packaging layer. By constructing a four-layer composite slow-release system, long-acting scale inhibition, extreme tolerance and dynamic response are achieved, the technical problems that a traditional scale inhibition material is high in burst release rate, poor in weather resistance and delayed in release are solved, the water treatment cost per ton is low, the RO membrane service life is long, and a full-period efficient scale inhibition solution is provided for a complex industrial water system.