63 results about "Restorative material" patented technology

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The invention relates to the cross technical field of industrial solid waste resource utilization and environmental pollution abatement, and discloses a modified fly ash environmental remediation material as well as a preparation method and application thereof. According to the material, industrial solid waste fly ash is used as a raw material, a glass body structure is destroyed through physical or chemical modification treatment, the specific surface area is increased, active functional groups such as surface hydroxyl groups are enriched, and the adsorption and fixation capacity on heavy metal lead (Pb < 2 + >) and cadmium (Cd < 2 + >) is remarkably improved. The chemical modification adopts an acid solution or an alkali solution, and the preparation method comprises the steps of raw material pretreatment, modification reaction, solid-liquid separation and washing, and drying and screening. When the material is applied to heavy metal contaminated soil remediation, heavy metal in an ion exchange state is promoted to be converted into a stable residue state, the bioavailability and the leaching risk of the heavy metal are remarkably reduced, meanwhile, high-added-value resource utilization of the fly ash is achieved, and the material has environmental, economic and social benefits and is suitable for large-scale remediation of Pb and Cd single or combined contaminated soil.

The invention discloses a submicron sphere soil remediation material as well as a preparation method and application thereof. The remediation material takes modified silicon dioxide as an inner core, nano zero-valent iron as a middle layer and aluminum oxide as an outer layer; the mass ratio of the inner core to the middle layer to the outer layer is (30-50): (20-40): (10-50). The remediation material synthesized through the method has the advantages of being good in soil compatibility, high in cyclic utilization rate, high in heavy metal removal efficiency and the like, and the target of low-energy-consumption remediation of the heavy metal contaminated soil can be achieved.

The invention provides a double-repairing-material composite system for self-repairing internal and external cracks of concrete, which comprises an internally doped composite dry powder repairing agent and an externally coated intelligent repairing liquid, the internal doping type composite dry powder repairing agent comprises high-activity modified silicate, silica fume, a composite catalyst, a calcium sulphoaluminate expanding agent, a magnesium oxide expanding agent, epoxy resin microcapsules, surface modified polypropylene fibers, a microbial carrier, a polycarboxylate superplasticizer, a dispersing agent and filler. The external coating type intelligent repairing liquid comprises an alkyl alkoxy silane mixture, a waterborne epoxy-acrylic acid hybrid emulsion, a latent curing agent, superfine core powder, nano silicon dioxide dispersion liquid, nano calcium carbonate, colored active mineral powder, a wetting agent, a defoaming agent, a flatting agent, a mildew preventive and water. Related preparation methods and uses are also provided. The double-repairing-material composite system is easy and convenient to use, can achieve multiple triggering and synergistic effect, can repair internal and external cracks at the same time, and is good in repairing effect.

The invention discloses selective laser melting biological ceramic powder for dental restoration and a preparation method thereof, and belongs to the technical field of dental restoration materials. The composite ceramic material comprises the following raw materials in parts by weight: 50-100 parts of composite ceramic powder and 0.1-2 parts of an absorbent, the composite ceramic powder comprises at least two of Al2O3, ZrO2, SiO2 and TiO2; the absorbent comprises any one of TiC, SiC, ZrC, TiN and graphite; the fluidity of the selective laser melting biological ceramic powder for dental restoration is 39-40 s / 50 g. According to the invention, the SLM process adaptability of the material is obviously improved, the inherent biocompatibility, mechanical strength and stability of biological ceramics are considered, and the technical barrier that traditional biological ceramic powder is difficult to be directly used for selective laser melting is overcome; and a feasible material solution is provided for direct additive manufacturing of personalized dental prostheses with high performance and complex structures.

The invention provides a biochemical composite soil heavy metal pollution fixing and repairing material and a preparation method thereof.The preparation method comprises the steps that biochar is subjected to acid treatment, and activated biochar is obtained; uniformly mixing calcium salt, ferric salt, aluminum salt and deionized water to obtain a mixed salt solution, adding urea to obtain a precursor solution, dipping the activated charcoal in the precursor solution, and then performing hydrothermal reaction to obtain loaded charcoal; mixing and grinding the oyster shell powder and dipotassium phosphate, and calcining at high temperature to obtain activated oyster shell powder; mixing the bacillus subtilis liquid, the activated oyster shell powder and trehalose, oscillating, centrifugally separating, and freeze-drying to obtain the biological composite material. Uniformly mixing the loaded biochar, the biological composite material and a carboxymethyl cellulose solution, granulating, and drying wet granules to obtain the biochemical compound type soil heavy metal pollution fixing and repairing material. According to the prepared fixing and repairing material, the fixing efficiency and adaptability to various heavy metals in soil are improved.

The invention discloses a durable anti-seepage repairing material and a preparation method thereof, and belongs to the technical field of anti-seepage plugging materials. The anti-seepage material is prepared from a sulphoaluminate base material, calcium aluminate-chitosan microcapsules, an enzymatic deposition material, an emulsion and a functional auxiliary agent; the sulphoaluminate base material is prepared from sulphoaluminate, calcium carbonate, anhydrite and silica fume; according to the calcium aluminate-chitosan microcapsule, a core material is calcium aluminate, and a wall material is composed of chitosan and methyl cellulose; the enzymatic deposition material is composed of urease and bacterial cellulose nanofibrils and urea microcapsules, the core material of the urea microcapsules is urea, and the wall material of the urea microcapsules is sodium alginate; the emulsion is prepared from epoxidized soybean oil acrylate, chitosan nanocrystals, bacterial cellulose nanofibrils and a photoinitiator; the functional additive is composed of a polycarboxylate superplasticizer, a retarder and a defoaming agent. The anti-seepage repair material prepared by the invention has excellent toughness, and can be repaired and healed after cracking.

The application belongs to the field of environmental governance, and provides a water sodium manganese ore-oxygen releasing agent composite type sediment repair material and a preparation and application method thereof, which comprises modified oxygen releasing agent, water sodium manganese ore, microbial flora and embedding matrix, the embedding matrix comprises calcium alginate, polyvinyl alcohol and water cross-linked formed hydrogel, wherein the microbial flora comprises domesticated aerobic denitrification and phosphorus removal mixed flora.The water sodium manganese ore-oxygen releasing agent composite type sediment repair material utilizes the photoelectric catalytic activity of water sodium manganese ore and the oxygen releasing ability of oxygen releasing compound, improves the oxidation-reduction potential of sediment, enhances the sustained degradation ability of organic pollutants, cooperatively removes nitrogen pollutants in water environment, enhances the in-situ repair effect of sediment, is applied to sediment repair, and is more efficient, environment-friendly and has long-term effect.

The invention relates to the technical field of ecological restoration materials, in particular to an ecological restoration material based on inorganic-organic compounding and a preparation method thereof. The ecological restoration material is prepared from the following raw materials in parts by weight: 55 to 65 parts of crushed coal gangue, 40 to 45 parts of Portland cement, 15 to 20 parts of polyacrylamide, 8 to 12 parts of starch, 25 to 30 parts of citric acid leached fly ash, 20 to 25 parts of organic matter, 7 to 11 parts of mica powder-doped improved effect comprehensive agent, 5 to 8 parts of multi-conditioning multi-feeding agent, 4 to 6 parts of silane coupling agent KH560, 2 to 4 parts of passivating agent, 1 to 3 parts of chelating agent and 30 to 35 parts of deionized water. The prepared ecological restoration material has excellent organic matter improvement performance and heavy metal passivation effect, meanwhile, the vegetation planting effect, the product strength, the anti-erosion effect and the freezing and cold resistance effect are remarkable, and the comprehensive coordination effect of the product is excellent.

The application belongs to the technical field of cement-based grouting and provides a water-based epoxy resin mortar rapid repair material for rapid repair of high-iron tunnel water leakage disease and a preparation process, which is made of the following components: 80-110 parts of magnesium phosphate cement, 5-20 parts of water-based epoxy resin, 8-25 parts of epoxy resin curing agent, 10-25 parts of fly ash, 5-10 parts of retarder, 1-2 parts of defoaming agent and 12-25 parts of water; the magnesium phosphate cement comprises magnesium oxide and phosphate; the magnesium oxide is a mixture of dead-burned magnesium oxide and light-burned magnesium oxide, and the mass ratio of the two is 3:1-20:1. The grouting material prepared by the formula and the preparation method has the advantages of short setting time, high early strength, strong wet adhesion, good durability and good fluidity.

The invention relates to the field of water and soil pollution treatment, in particular to a method for reinforcing and fixing hexavalent chromium pollutants based on iron oxide in-situ vulcanization coupling organic matter, which comprises the following steps: step 1, injecting a vulcanizing agent into a hexavalent chromium polluted area, so that in-situ iron oxide minerals are subjected to vulcanization modification to generate modified minerals; 2, a natural organic acid solution is injected and reacts with the modified minerals, the fixing efficiency on hexavalent chromium is enhanced, and an iron sulfide oxide mineral-organic composite repairing material is generated in situ; and 3, the iron sulfide oxide mineral-organic composite repairing material reacts with hexavalent chromium, trivalent chromium precipitates are generated, and long-acting fixation of hexavalent chromium is achieved. The remediation efficiency and the application range of hexavalent chromium are remarkably improved, meanwhile, the method has the advantages of being simple and convenient in process, low in cost, environmentally friendly and the like, the method is particularly suitable for large-scale site remediation and practical engineering application, and a reliable technical means is provided for soil and underground water chromium pollution treatment.

Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. FIG. 1 Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. Mixing and placing calcium oleate, sodium silicate, S10 polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 20 25 20 15 77 04 M ar 2 02 5 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 1 / 2 FIG. 1 FIG. 2 1 / 2 Mixing and placing calcium oleate, sodium silicate, S10polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 Inorganic nano-seed crystal Hydration products 5 um FIG. 2 20 25 20 15 77 04 M ar 2 02 5 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2

The invention relates to lithium silicate low-quartz glass ceramics which are characterized by a combination of very good mechanical and optical properties and thus can be used in particular as repair materials in dentistry.

Disclosed in the present invention are a highly thermally-conductive epoxy resin scratch self-repairing material doped with phase-change microspheres and a preparation method therefor. The preparation method comprises using n-octacosane having a phase-change capability as microsphere main bodies; modified oleophilic nano SiC particles are added to the microsphere main bodies so that the microspheres can obtain a non-contact targeted heating function; and modified oleophilic BN particles are added to an epoxy matrix so that the high thermal conductivity of the modified oleophilic BN particles increases the thermal conductivity of a composite material, helping the microspheres absorb heat and undergo a phase change. When damage occurs, phase-change microcapsules in the damaged area are induced, by means of targeted heating, to rapidly melt so as to fill in damaged channels, and are cooled and cured to achieve self-repairing of the material.

The invention discloses a soil remediation material and a preparation method and application thereof, and belongs to the technical field of soil remediation, the preparation method comprises the following steps: adding deionized water into coarse coke powder and KOH, mixing, and activating at high temperature to prepare carbon powder; the method comprises the following steps: carbonizing straws, and adding humic acid, bentonite and deionized water to prepare biological carbon granules; preparing a nano-TiO2 suspension, mixing the nano-TiO2 suspension with carbon powder, and performing ultrasonic treatment to prepare an intermediate; and mixing the biological carbon granules, the intermediate, metal glass powder, a binder and deionized water, and granulating to obtain the soil remediation material. The invention also discloses the soil remediation material prepared by the preparation method and application of the soil remediation material in remediation of heavy metal and organic pollutant soil. The composite material has the beneficial effects that a composite material framework is constructed by utilizing the biological straw and the coarse coke powder, and a TiO2 photocatalysis and metal matrix-carbon matrix double-active center is formed by combining a stepwise mixed loading compounding mode, so that comprehensive remediation and treatment of heavy metal and organic pollutant soil are realized.

The invention discloses a microorganism synergistic mineralization concrete crack self-repairing material as well as preparation and application thereof. The self-repairing material comprises a composite porous carrier loaded with a microorganism synergistic mineralizing agent and layered double hydroxides, the composite porous carrier comprises diatomite, silt with the particle size of 100-200 [mu] m and nutrient substances; the microorganism synergistic mineralizing agent comprises bacillus alcalophilus with mineralizing ability; the layered double hydroxide is a MgAl-C3H5O3 <-> type layered double hydroxide or a ZnAl-C3H5O3 <-> type layered double hydroxide; during application, the concrete crack self-repairing material is uniformly mixed with other components of concrete according to the proportion. The calcium carbonate sediment generated by microorganism mineralization seals cracks to form a physical barrier for preventing seawater corrosion, and the layered double hydroxide fixes corrosive ions, inhibits steel bar corrosion and forms a chemical barrier for enhancing structural durability.

This invention discloses a method for preparing a high-salinity intelligent responsive cement-based anti-salt corrosion and self-healing material. The method includes constructing an intelligent responsive base by preparing a microcapsule self-healing agent and regulating the ZIF-8 preparation process, followed by in-situ growth of Mg-Al-LDH and functional film coating. This achieves the synergistic functions of active anti-salt corrosion, efficient and stable self-healing, promoting cement hydration, and regulating ion adsorption in high-salt environments. This invention can accurately sense changes in high-salt environments and intelligently release the self-healing agent, realizing the dual functions of anti-salt corrosion and self-healing in cement-based materials. It can be widely applied in cement-based engineering projects in high-salt environments such as marine and salt lake environments, extending the service life of concrete structures.

The utility model discloses a filling device convenient for shaping a biological ceramic repair material. The device comprises a filler handle part, a filling rod and a filler head part, the filling rod is movably arranged in the filler handle part to form a filler body; the filler head part is connected with the filler handle part through the connecting part; a containing groove and a shaping opening are formed in the filler head, the containing groove is used for adding materials such as I Root-BP and MTA, and the shaping opening is used for shaping and filling the materials.

The utility model discloses a kind of calcium phosphate material 3D printing device in bone repair material technical field, including frame, printing assembly, printing platform and the three-way servo device for driving printing assembly and / or printing platform movement, wherein, printing platform is provided with several support mechanisms, it is used to support printing object, including extension arm, extension arm one end is equipped with micropore, the inside of this end is provided with wax and heating sheet, for exuding molten wax to adhere to support printing object, by using molten wax as adhering support structure, by extension arm and resist in the surface of bone material in forming, by heating gauze to appropriate temperature, molten wax exudes micropore, and adhere to form after cooling, to support in this way, with printing process, it can also be heated and dissolved then separate, further move to higher position and adhere, without producing burr, without affecting the surface smoothness degree and shape of bone material.

The invention discloses an ancient building brick masonry surface deterioration repair material and a weather resistance evaluation method thereof, and belongs to the technical field of brick masonry ancient building repair, the repair material contains three optimization systems: a lime-fly ash system (S-F), a cement mortar-fly ash system (L-F) and a calcium hydroxide-silica fume mixing system (C-S. The preparation process is simple and convenient. According to the evaluation method, the mass loss rate, the innovatively defined wave velocity degradation rate and the compressive strength are integrated, an extreme environment is simulated through a freeze-thaw cycle test, ultrasonic flaw measurement and compression test are combined, a full-dimension evaluation system is formed, and a long-term damage prediction curve is constructed through data fitting. Tests show that the cement mortar-fly ash system is optimal and meets the repair requirements. The internal damage is quantified according to the wave velocity degradation rate, a scientific basis is provided for material screening and long-term maintenance, and the method has engineering value and cultural heritage protection significance.

The present application relates to the technical field of composite materials, and particularly relates to a bioactive photocuring material, a preparation method thereof and application thereof as a dental substrate repair material. The bioactive photocuring material comprises a polymerizable monomer, an initiator and an inorganic filler, wherein the inorganic filler comprises calcium hydroxide; and further comprises a bioactive photocuring prepolymer, wherein the bioactive photocuring prepolymer is obtained by reacting a bioactive organic acid, a polyol monomer and a monomer containing a carbon-carbon double bond at 120-150 DEG C for 1-72 hours, and then neutralizing the reaction product with a neutralizing agent; and the monomer containing a carbon-carbon double bond is selected from at least one of a diol, a diacid and an anhydride. In the present application, the bioactive photocuring prepolymer is introduced into the calcium hydroxide system, so that the viscosity of the system is increased, the toughness, strength and degradability of the photocuring resin are enhanced, and the regeneration of bone and dentin is promoted by releasing active ingredients, and the bioactive photocuring material can be applied to a base material for caries filling and composite resin filling.

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

The application provides a soil conditioner and a soil health improvement method, and steps include: mixing activated illite and dry cow dung, adding an activation solution to the mixture according to a solid-liquid ratio of 1:5-1:20, first ultrasonic oscillation, then mixing for secondary activation, then washing with a large amount of water until pH is constant, drying to obtain a dried mixture; compounding the dried mixture with calcium oxide to obtain the soil conditioner. The application uses natural minerals and waste biomass-based raw materials to develop a non-iron-based, green and sustainable remediation material, which can realize the synergistic stabilization of Cd and As composite pollution in a karst area in southwest China, and can also realize the improvement of soil health indexes such as microbial diversity, soil TOC, CEC, available P and available K; the application can not only solve the technical problem of difficult simultaneous stabilization of Cd and As, but also avoid the influence of the stabilized material on soil health.

The application relates to a composite slow-release material for groundwater remediation and a preparation process thereof, and relates to the technical field of groundwater remediation materials. The preparation raw materials comprise the following components in mass fractions: 20-40 parts of a composite oxidant, 30-50 parts of an inner layer wall material, 10-20 parts of glucose, 40-60 parts of an outer layer wall material and 5-15 parts of a Fenton self-mesoporous titanium dioxide. The preparation process comprises the following steps: preparing the Fenton self-mesoporous titanium dioxide, preparing an inner layer microcapsule and preparing the composite slow-release material. The application has the effect of improving the pollutant degradation performance of the composite slow-release material. The composite slow-release material has good oxidative degradation capacity, can promote the growth and metabolism of microorganisms in groundwater, cooperates with the microorganisms to degrade pollutants, and improves the removal efficiency of the pollutants and the persistence of the remediation effect.

The demand for biocompatible dental materials has increased significantly, particularly in vital pulp therapy, due to the need for materials that promote tissue regeneration and long-term success. This invention introduces a novel Nanocarbon Platelets-Enhanced Portland Cement Composite that combines the well-established properties of Portland cement with the advanced mechanical and biological characteristics of graphene oxide nanocarbon platelets. This composite is designed to serve as both a restorative material and an agent for vital pulp therapy. The integration of graphene oxide nanocarbon platelets enhances the composite's mechanical properties while maintaining superior biocompatibility. This ensures the material supports cell viability and proliferation, crucial for successful tissue integration and regeneration. The unique formulation also improves the sealing ability of the cement, providing exceptional protection against bacterial infiltration and aiding in the preservation of dental structures. This invention aims to address the limitations of existing Portland cement-based materials, such as weak mechanical properties and potential cytotoxicity, by offering a more robust and biocompatible alternative. The composite is developed with a specific focus on dental applications, ensuring it meets the demands of modern restorative and endodontic procedures. The Nanocarbon Platelets-Enhanced Portland Cement Composite offers a cost-effective solution that can be easily integrated into existing clinical practices. Its development represents a significant advancement in materials science, with potential applications beyond dentistry, such as in orthopedic and craniofacial reconstruction. This composite sets a new standard for dental materials by combining mechanical strength, biocompatibility, and ease of use, promising improved outcomes for both patients and practitioners.

This application relates to the field of dental restorative materials technology and discloses a light-cured composite resin inlay, comprising an inlay body, an elastic transition layer, an adhesive layer, and a surface treatment layer. This light-cured composite resin inlay, through the use of a high-strength composite resin inlay body and a reinforcing fiber network, effectively disperses the internal stress generated by the composite resin during light curing. Subsequently, a silane coupling agent enhances the bonding force between the reinforcing fiber network and the high-strength composite resin, thereby increasing the overall strength of the inlay body, reducing the risk of restoration damage due to stress concentration, and lowering the possibility of gaps caused by volume shrinkage. This improves the fit between the restoration and the tooth structure. The inlay body is formed in one step using light-curing technology, ensuring the overall structural strength and performance consistency of the inlay body, while also improving production efficiency and reducing production costs.

The present application relates to solid waste resource utilization technical field, provide a kind of road modified phosphogypsum and its preparation method and application, the road modified phosphogypsum is by the phosphogypsum waste of 15~40% attached water and cement A, with mass ratio 100:1~10 homogenization, aging is obtained.The present application only uses cement as modifier, realizes the harmless treatment of traditional phosphogypsum waste, while, obtains the road modified phosphogypsum of excellent performance, avoids the addition of excessive material and influences its good attribute of green recyclable resource use, simultaneously, avoids the moisture content too large when directly as roadbed material and ecological restoration material, cannot be compacted and formed and the secondary environmental pollution problem generated by the disposal of harmful substance.Furthermore, cement is used as cementing material for the preparation of composite material of the specific road modified phosphogypsum, can realize more excellent physical and mechanical properties under the condition that the utilization rate of phosphogypsum is more than 80%.

The application relates to the technical field of biomedical materials, and specifically discloses a preparation method of a double-crosslinked 3D-printed bone repair scaffold. The scaffold is made of a biphasic calcium phosphate matrix and a gelatin methacrylate hydrogel outer layer. The preparation method comprises the following steps: firstly, preparing biphasic calcium phosphate ink, and constructing a porous scaffold blank through 3D printing; then, carrying out double-crosslinking treatment of calcium chloride solution and glutaraldehyde solution in sequence to obtain a scaffold matrix with enhanced mechanical properties; then, preparing gelatin methacrylate hydrogel loaded with modified teriparatide, and compounding the gelatin methacrylate hydrogel with the scaffold matrix; and finally, obtaining the final product after blue light crosslinking and solidification. The bone repair scaffold has good biocompatibility and osteogenic activity, and can effectively promote bone defect repair. In addition, the preparation method is controllable and has good repeatability, the structure of the scaffold is accurately controlled through the 3D printing technology, and a new approach is provided for the preparation of personalized bone repair materials.

The invention relates to quartz mixed crystal glass-ceramics, and to precursors thereof, which are characterized by excellent mechanical and optical properties, and which can be used in particular as dental restorative materials.