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46results about How to "Controllable mechanical strength" patented technology
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Polymer composite fiber surgical suture line capable of sustaining and controlling release of therapeutic medicaments and preparation method thereof
InactiveCN101721739AAntibacterial and anti-inflammatoryHigh mechanical strengthSuture equipmentsFiberPolymer composites
The invention belongs to the field of biomedical materials and relates to a polymer composite fiber surgical suture line capable of sustaining and controlling the release of therapeutic medicaments and a preparation method thereof. Nucleated hollow silicon dioxide submicron spheres containing the therapeutic medicaments are dispersed in aqueous solution of a polymer; the nucleated hollow silicon dioxide submicron spheres containing the therapeutic medicaments are embedded in polymer fibers by using a spinning method to form the polymer composite fiber surgical suture line of the nucleated hollow silicon dioxide submicron spheres embedded and loaded the therapeutic medicaments to obtain the polymer composite fiber surgical suture line capable of sustaining and controlling the release of the therapeutic medicaments. The embedded nucleated hollow silicon dioxide submicron spheres are dispersed in the polymer fibers and filled with the medicaments and has a sustained release function. Themedicaments are released by slow diffusion and the gradual degradation of the polymer fibers. The loaded medicaments have functions of resisting bacteria and inflammation, killing tumor cells remaining after surgery and the like.
Owner:陈东 +2
Chitosan modified alginate hydrogel three-dimensional porous bracket and preparation method thereof
InactiveCN101773683ARich sourcesControllable physical and chemical propertiesProsthesisPhosphateFreeze-drying
The invention relates to a chitosan modified alginate hydrogel three-dimensional porous bracket with specific in-vitro degradability and a preparation method thereof. The method comprises the following steps: dissolving sodium alga acid serving as a raw material in phosphate buffer solution; performing amidation reaction of a carboxyl group in the sodium alga acid and an amino group in a cross-linking agent cystamine or dimethyl cystinate under the activation of water-soluble carbodiimide to form a chemically crosslinked hydrogel; performing freeze drying on the hydrogel to obtain a porous bracket material of the hydrogel; and performing surface modification on the porous bracket by using chitosan. In solution of a reducing agent such as cysteine with an appropriate concentration, a disulfide bond in a hydrogel cross-bridge is degraded through a disulfide bond-sulfydryl conversion reaction, so the porous bracket is decomposed and dissolved and disappears. Therefore, the porous bracket can be used as an in-vitro cell culture template material. The hydrogel porous bracket researched by the invention has the characteristics of simple preparation, rich raw material source, low cost and availability. Various physiochemical performances, mechanical strength, degradation rate and surface properties of the bracket material are controllable within a large range.
Owner:TIANJIN UNIV
Ni-based alloy oil sleeve and manufacturing method for high-acidity deep well
ActiveCN101613833ALow costImprove high temperature corrosion resistanceDrilling rodsRoll mill control devicesSolution treatmentImpurity
The invention relates to a Ni-based alloy oil sleeve for a high-acidity deep well, which comprises the following components in percentage by mass: less than or equal to 0.02 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, less than or equal to 0.5 percent of Si, less than or equal to 1.0 percent of Mn, 40 to 60 percent of Ni, 20 to 30 percent of Cr, 1 to 10 percent of Mo, 1 to 5 percent of W, 0 to 5 percent of Co, 0.1 to 3.0 percent of Cu, 0.01 to 0.5 percent of Al, less than or equal to 0.01 percent of O, less than or equal to 1.5 percent of Ti, and the balance of Fe and inevitable impurities. In the invention, the thermal extrusion processing performance and corrosion resisting performance of the alloy are effectively ensured by controlling the contents of the Al and O. The 90 to 140 ksi steel-grade Ni-based alloy oil sleeve meeting different well depth requirements of high-acidity oil fields and gas fields is manufactured by thermal extrusion, 1,050-1,150 DEG C of solution treatment and cold rolling of the smelted and forged blanks.
Owner:BAOSHAN IRON & STEEL CO LTD
Fe-based austenite alloy oil sleeve and manufacturing method for high-acidity deep well
InactiveCN101613834ALow head lifeIncrease production costDrilling rodsRoll mill control devicesSolution treatmentChemical composition
The invention relates to a Fe-based austenite alloy oil sleeve, which comprises the following components in percentage by mass: less than or equal to 0.03 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 0.01 to 1.0 percent of Si, 0.01 to 3.0 percent of Mn, 25 to 40 percent of Ni, 20 to 35 percent of Cr, 1 to 5 percent of Mo, 0.1 to 1.5 percent of Cu, 0.01 to 0.5 percent of Al, less than or equal to 0.01 percent of O, and the balance of Fe and inevitable impurities. The 90 to 140 ksi steel-grade Fe-based alloy oil sleeve meeting different well depth requirements of high-acidity oil fields and gas fields is manufactured by thermal extrusion, 1,050-1,180 DEG C of solution treatment and cold rolling of the smelted and forged blanks.
Owner:BAOSHAN IRON & STEEL CO LTD
Hydrogel material for 3D bioprinting and preparation method and application of hydrogel material
ActiveCN106474560AGood compatibilityImprove structural stabilityAdditive manufacturing apparatusProsthesisHigh cellSolvent
The invention belongs to the technical field of biological materials, and discloses a hydrogel material for 3D bioprinting and a preparation method and application of the hydrogel material. The hydrogel material comprises the following components in percentages by mass: 0.5-10% of gellan gum and / or derivatives, 0.1-20% of PEG and / or derivatives thereof, 0-1% of a crosslinking initiator, 0-15% of biologically active components and the balance of a solvent. The hydrogel material is double-network hydrogel based on the gellan gum and PEG; interpenetrating double-network structures are formed in a physiological environment; and the hydrogel material has good structure and dimensional stability, and has the advantages of quick gum formation under physiological conditions, excellent cell compatibility, small immunological rejection, high cell encapsulation efficiency, controllable mechanical strength, biodegradability and the like. The hydrogel material is applied to 3D bioprinting; the shortcomings of low curing speed, harsh curing conditions, limited mechanical properties, poor cell compatibility and the like are overcome; and the hydrogel material has obvious advantages and good industrialized prospect.
Owner:JINAN UNIVERSITY
Whey protein/gelatin edible compound film and preparation method thereof
InactiveCN101746557AConsistent concentrationLow costFlexible coversWrappersNutritive valuesWhey protein
The invention discloses a whey protein / gelatin edible compound film which belongs to the field of food-packaging materials. The compound film is made from whey protein solution and gelatin solution which are added with plasticizer and blended, wherein the weight ratio between whey protein and gelatin is 1-99:99-1. The thickness of the edible compound film is 80 Mu m to 110 Mu m. The weight percentage concentration of the whey protein solution is 8 percent to 10 percent, and the weight percentage concentration of the gelatin solution is 8 percent to 10 percent. The invention also discloses a preparation method for the compound film. The compound film has a high nutritive value and is cheap, and the mechanical properties of the film can be controlled by regulating the compound proportion of whey protein and gelatin in order to adapt to packages for different purposes.
Owner:CHINA AGRI UNIV
Gel electrolyte membrane, lithium ion battery, and preparation methods therefor
ActiveCN106602137AControllable mechanical strengthThe injection volume range is controllableSolid electrolytesFinal product manufactureStandard curveBattery electrode
The invention relates to a gel electrolyte membrane, a lithium ion battery, and preparation methods therefor. The preparation method for the gel electrolyte membrane comprises the steps of providing a battery electrode plate; preparing gel electrolyte precursors of different viscosities; and forming the gel electrolyte membranes on at least one surface of the electrode plate by the gel electrolyte precursors of different viscosities, testing the mechanical strengths of the gel electrolyte membranes prepared from the gel electrolyte precursors of different viscosities, making a corresponding viscosity-mechanical strength standard curve, and obtaining a target gel electrolyte membrane prepared by selecting the gel electrolyte precursors of different viscosities according to the standard curve corresponding to the predetermined mechanical strength of the target gel electrolyte membrane. The invention also relates to the gel electrolyte membrane prepared by the method, and also relates to a preparation method for the lithium ion battery which is prepared from a gel electrolyte membrane cell after the gel electrolyte membrane cell is obtained by adopting the gel electrolyte membrane, and the lithium ion battery prepared by the lithium ion battery preparation method.
Owner:FAIR ELECTRIC WUHAN CO LTD
Scar repairing material and preparation method thereof
ActiveCN110237054AImprove securityGood biocompatibilityOrganic active ingredientsPharmaceutical non-active ingredientsBiocompatibility TestingRepair material
The invention discloses a scar repairing material and a preparation method thereof. The scar repairing material is prepared from a microcapsule and crosslinked hyaluronic acid gel, wherein the microcapsule is formed by taking a chitosan substance and a hyaluronic acid substance as capsule materials and taking ectoin and allantoin as core materials, the microcapsule is uniformly dispersed in the crosslinked hyaluronic acid gel, the chitosan substance is chitosan or / and a chitosan derivative, the hyaluronic acid substance is hyaluronic acid or / and hyaluronate. The scar repairing material has the advantages that the safety is extremely high, the microcapsule coating the ectoin and the allantoin can continuously and stably play a role in a crosslinked hyaluronic acid gel stent, the biocompatibility is good, the scar repairing, healing promoting and anti-inflammatory functions are excellent, the mechanical strength of the material is controllable, the material can be completely degraded, and the application range is wider.
Owner:BLOOMAGE BIOTECHNOLOGY CORP LTD
Biomimetic hydroxylapatite powder/gelatin/sodium alginate composite 3D print bracket and preparation method thereof
ActiveCN111097068AOptimal Control StructureGood biocompatibilityAdditive manufacturing apparatusTissue regeneration3d printNatural bone
The invention discloses a biomimetic hydroxylapatite powder / gelatin / sodium alginate composite 3D print bracket and a preparation method thereof. The preparation method of the biomimetic 3D bracket comprises the steps of (1) preparing hydroxylapatite powder having a biomimetic classified structure; (2) preparing hydroxylapatite powder / gelatin / sodium alginate composite pulp; and (3) preparing the biomimetic 3D print bracket. According to the biomimetic hydroxylapatite powder / gelatin / sodium alginate composite 3D print bracket and the preparation method thereof disclosed by the invention, a 3D printing technique is utilized, the prepared organic / inorganic composite three-dimensional print bracket is controllable in outside size and good in biocompatibility, components and a multi-level structure of natural bone tissue are sufficiently simulated, and controlled mechanical strength is given to materials; and the micro-nano multi-level structure of the composite bracket has higher osteogenesis activity and osteoinductive, a multi-level pore structure can effectively induce ingrowth of tissue and blood vessels, and regeneration and repair of the bone tissue are promoted.
Owner:SOUTH CHINA UNIV OF TECH
Drug-loaded hyaluronic acid nanofiber composite dressing and preparation method thereof
InactiveCN105816903AWide variety of sourcesGood biocompatibilityAbsorbent padsBandagesFiberBiocompatibility Testing
The invention discloses a drug-loaded hyaluronic acid / nano fiber composite dressing and a preparation method thereof. The composite dressing comprises a hydrogel layer and a nanofiber layer formed by cross-linking hyaluronic acid macromers compounded with each other, and the drug-loaded nanogel is loaded in the hydrogel layer. The preparation method includes preparation of drug-loaded nanogel; synthesis of photo-crosslinkable or chemically crosslinkable monomers of hyaluronic acid macromolecules; The hyaluronic acid-based hydrogel is prepared; the hyaluronic acid-based hydrogel is combined with the nanofiber membrane to obtain a drug-loaded hyaluronic acid / nanofiber composite dressing. The raw materials used in the present invention have good biocompatibility. By combining two different structures of hydrogel and nanofiber, the wound exudate can be absorbed and diverted, and the overall stability of the dressing can be improved at the same time, which has long-acting antibacterial properties. , Anti-protein adsorption, anti-fouling, heat insulation and other functions.
Owner:DONGHUA UNIV
Preparation method and application of temperature-sensitive composite hydrogel by utilizing synergistic effect of photocatalysis and temperature sensitivity
ActiveCN111154027AHigh porosityImprove efficiencyOther chemical processesAlkali metal oxides/hydroxidesPtru catalystDyeing wastewater
The invention relates to the technical field of printing and dyeing wastewater treatment. The invention discloses a preparation method and application of temperature-sensitive composite hydrogel by utilizing a synergistic effect of photocatalysis and temperature sensitivity. The temperature-sensitive composite hydrogel disclosed by the invention is prepared by the steps: introducing a temperature-sensitive copolymer and a photocatalyst into alginate hydrogel; the porosity of the hydrogel is adjustable in the temperature change process, a dye can be adsorbed and degraded under the illuminationcondition, and the adsorption capacity of the composite hydrogel to the dye is improved by virtue of the synergistic effect of a porous structure in the hydrogel caused by adding a catalyst and a loose structure formed by a temperature-sensitive copolymer at the temperature higher than the conversion temperature. And by virtue of the photocatalyst embedded in the hydrogel, the degradation of the adsorbed dye and the cyclic utilization of the composite hydrogel can be realized, and the composite hydrogel can be applied to the fields of printing and dyeing sewage treatment and the like.
Owner:ZHEJIANG SCI-TECH UNIV
Degradable silica-based hybrid polymer biomedical elastomer and preparation method thereof
The invention provides degradable silica-based hybrid polymer biomedical elastomer and a preparation method thereof. The degradable silica-based hybrid polymer biomedical elastomer (PCD-POSS) is obtained by preparing PCD prepolymer from citric acid, diol or polyhydric alcohol through thermal polymerization, preparing PCD-g-POSS prepolymer from acid, diol or polyhydric alcohol and POSS through thermal polymerization, dissolving the two types of prepolymer in organic solvent, and adding a cross-linking agent HDI and a catalyst for the cross-linking reaction. The thermal polymerization method used for the method is environmentally friendly, convenient to operate and low in raw material cost. The prepared PCD-POSS has biomimetic viscoelasticity, high chemical strength, good mechanical performance, high biological activity and biological stability, adherency and proliferation of osteoblast and soft tissue cells can be remarkably promoted, and the silica-based hybrid polymer biomedical elastomer has good application prospects in the fields of bone tissue and soft tissue regeneration and medicine transportation.
Owner:XI AN JIAOTONG UNIV
Preparation method of macroporous weak-base anion exchange resin special for gold extraction
PendingCN113042113AHigh mechanical strengthControllable mechanical strengthAnion exchangersProcess efficiency improvementPolymer scienceDivinylbenzene
The invention discloses a preparation method of macroporous weak-base anion exchange resin special for gold extraction. According to the invention, a crosslinked styrene-divinylbenzene microsphere matrix obtained by regulating and controlling a preparation process of crosslinked styrene-divinylbenzene microspheres has the advantages of high mechanical strength, controllable specific surface area, adjustable aperture and the like; the weak-base anion exchange resin special for gold extraction, synthesized on the basis of the crosslinked styrene-divinylbenzene microsphere matrix also has a controllable pore structure and pore size distribution, and can realize selective adsorption with the gold element; and the total exchange capacity of the resin is 2.0-4.5 mmol / g, the gold element exchange capacity is 30-240 mg per g of dry resin, wear resistance is good, and the problems of low exchange capacity, poor mechanical strength and the like of traditional special gold extraction ion exchange resin are solved.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Preparation method and sealing process of explosion-proof primary lithium battery cover group and sealing glass
PendingCN112694257AControl the compressive strengthAdjust the coefficient of thermal expansionCell sealing materialsThermal dilatationElectrolytic agent
The invention discloses a preparation method and a sealing process of an explosion-proof primary lithium battery cover group and sealing glass. A glass material which is resistant to electrolyte corrosion, excellent in electrochemical performance, controllable in mechanical strength and used for sealing the primary lithium battery cover group is provided, and the compressive strength of the glass is controlled by designing glass components and the sealing thickness. The explosion-proof principle is that when the internal pressure of the battery is greater than the designed pressure in the use process, namely the pressure of the battery is overloaded, the pressure-bearing strength of the glass material is just reached, so that the glass is cracked, the internal pressure of the battery is slowly released, and the battery does not have dangerous situations such as violent explosion. The shell is made of stainless steel series and carbon steel series, the stainless steel series comprises 304L, 316L and the like, and the core column is made of series iron-nickel alloys such as alloys 4J28, 4J50, 4J52 and the like. A SiO2-B2O3-BaO-Na2O3 glass system is selected as a main body, and various metal oxides are added to adjust the thermal expansion coefficient, the glass softening temperature, the chemical stability and the mechanical properties of the glass.
Owner:XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
Support material with conductivity and antioxygenic property and preparation method thereof
ActiveCN106178109AControllable mechanical strengthAdjustable mechanical strengthTissue regenerationProsthesisBiocompatibility TestingOxidation resistant
The invention discloses a support material with conductivity and an antioxygenic property and a preparation method thereof. The support material is prepared from phenylamine pentamer modified by glutathione, and gelatin. The support material has favorable mechanical strength and adjustable degradation characteristic. More importantly, the support material has good conductivity, and can effectively scavenge various oxygen radicals such as hydroxyl radicals, organic oxygen radicals and superoxide radicals. According to the support material with the conductivity and the antioxygenic property and the preparation method thereof provided by the invention, the dual-network conductive support material is prepared by adopting one-step shaping, so that the preparation method is simple, components are uniform and controllable. More importantly, the support material has favorable biocompatibility and can support the adhesion and the growth of various cells. Stem cells can be promoted to differentiate into cardiac muscle cells, so that the support material has potential application prospect in cardiac muscle tissue engineering.
Owner:INST OF BASIC MEDICAL SCI ACAD OF MILITARY MEDICAL SCI OF PLA
Modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and preparation method and use method thereof
ActiveCN113354444AImprove bindingGood flexibilityNon-macromolecular adhesive additivesAmide/imide polymer adhesivesPhysical chemistryEthylenediamines
The invention discloses a modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and a preparation method and a use method thereof. The preparation method comprises the following steps: preparing the modified bentonite-based hydrogel precursor solution and a deionized water diluted solution of tetramethylethylenediamine; uniformly mixing the modified bentonite-based hydrogel precursor solution with a deionized water diluted solution of tetramethylethylenediamine, and coating a to-be-repaired part of the silicate cultural relic with a mixed solution of the modified bentonite-based hydrogel precursor solution and the deionized water diluted solution of tetramethylethylenediamine; and attaching a repairing part of the silicate cultural relic to the to-be-repaired part of the silicate cultural relic so that a mixed solution of the modified bentonite-based hydrogel precursor solution and the deionized water diluted solution of tetramethylethylenediamine naturally forms the modified bentonite-based hydrogel, and bonding repairing of the silicate cultural relic is achieved.
Owner:XI AN JIAOTONG UNIV
Degradable ureteral stent and manufacturing method thereof
ActiveCN111001045AImprove degradation rateImprove mechanical propertiesCatheterUretero-ureteralCatheter
The invention discloses a degradable ureteral stent and a manufacturing method thereof, belongs to the technical field of medical catheters, and aims to solve the problem in the prior art that an existing ureteral stent cannot be absorbed by a human body and needs to be taken out in an operation. According to the technical scheme, the degradable ureteral stent comprises an outer membrane layer, awoven layer and an inner membrane layer which are made of degradable materials, and the woven layer is formed by weaving two different degradable materials. The degradable ureteral stent is composed of the inner membrane layer, the woven layer and the outer membrane layer which are made of different degradable materials, and by means of the difference of the thermal performance and the degradationspeed of the multi-component degradable materials, the overall mechanical performance of the degradable ureteral stent is improved, and the degradation speed is further increased.
Owner:SECOND AFFILIATED HOSPITAL OF XIAN MEDICAL UNIV
Gel electrolyte membrane, lithium ion battery and preparation method thereof
ActiveCN106602137BControllable mechanical strengthSimple processSolid electrolytesFinal product manufacturePhysical chemistryMembrane cell
The invention relates to a gel electrolyte membrane, a lithium ion battery, and preparation methods therefor. The preparation method for the gel electrolyte membrane comprises the steps of providing a battery electrode plate; preparing gel electrolyte precursors of different viscosities; and forming the gel electrolyte membranes on at least one surface of the electrode plate by the gel electrolyte precursors of different viscosities, testing the mechanical strengths of the gel electrolyte membranes prepared from the gel electrolyte precursors of different viscosities, making a corresponding viscosity-mechanical strength standard curve, and obtaining a target gel electrolyte membrane prepared by selecting the gel electrolyte precursors of different viscosities according to the standard curve corresponding to the predetermined mechanical strength of the target gel electrolyte membrane. The invention also relates to the gel electrolyte membrane prepared by the method, and also relates to a preparation method for the lithium ion battery which is prepared from a gel electrolyte membrane cell after the gel electrolyte membrane cell is obtained by adopting the gel electrolyte membrane, and the lithium ion battery prepared by the lithium ion battery preparation method.
Owner:衡电科技(成都)有限公司
Medical degradable multilayer polymer/graphene film material and preparation method thereof
ActiveCN110327484AGood antibacterial functionPrevent infiltrationSuture equipmentsCoatingsPolymer scienceBiocompatibility Testing
The invention discloses a medical degradable multilayer polymer / graphene film material and a preparation method thereof. The method includes firstly attaching a biodegradable polymer to a single-layergraphene / Cu substrate by spin coating or casting; then removing Cu through etching to obtain polymer / single-layer graphene film; and laminating a plurality of layers of the polymer / single-layer graphene film to obtain the multilayer polymer / graphene film. The polymer is good in biocompatibility with graphene and is degradable in vivo, and the degradation time of the disclosed film material can beadjusted and controlled through controlling the number of layers of the polymer / graphene film. In addition, the multilayer polymer / graphene film has high mechanical strength, and is corrosion resistant and antibacterial. The preparation method is simple. The multilayer polymer / graphene film material is expected to be applied in clinical surgical suture supporting materials and surface modification of implants.
Owner:ZHEJIANG UNIV
Preparation method of chitosan oligosaccharide mouth cleaning buccal tablets
ActiveCN105410913AWith controlled release effectThe release rate is easy to controlAntibacterial agentsOrganic active ingredientsFreeze-dryingMoringa pterygosperma
The invention provides a preparation method of chitosan oligosaccharide mouth cleaning buccal tablets. Each chitosan oligosaccharide mouth cleaning buccal tablet is prepared from the following components in percentage by weight: 5-10% of chitosan oligosaccharide, 70-85% of alginate and 10-20% of moringa oleifera powder; and the method comprises the following steps: (1) uniformly mixing the chitosan oligosaccharide, alginate and moringa oleifera powder; (2) adding pure water into the mixture obtained in the step (1), wherein, the weight ratio of the water to the mixture is (1:20)-(1:50); and stirring for 20-40min at 20-60 DEG C; (3) putting the uniform slurry of chitosan oligosaccharide, alginate and moringa oleifera powder obtained in the step (2) into a freeze-drying disk while controlling the thickness of the uniform slurry layer at 3-30mm; and evening the surface in a mechanical way; (4) putting the freeze-drying disk with the uniform slurry of chitosan oligosaccharide, alginate and moringa oleifera powder in the step (3) into a freeze drier, pre-freezing for 20-50min at (-20)-(-40) DEG C, vacuumizing and performing freeze drying until the water content of the freeze-dried membrane is 4-8% by weight; and (5) preparing the tablets containing chitosan oligosaccharide, alginate and moringa oleifera powder, prepared in the step (4), into buccal tablets by using a die cutting method.
Owner:LIAONING SANHE WINE
Preparation method for sodium alginate nanometer fiber-based hydrogel
InactiveCN107090085AEasy to prepareProcess environmental protectionSurgical adhesivesPharmaceutical delivery mechanismFiberRed blood cell
The invention discloses a preparation method for sodium alginate nanometer fiber-based hydrogel. Additional electrolyte and alcohol are utilized to capture water in a sodium alginate nanometer fiber solution system, so that nanometer fibers get close and gather to intertwine and construct hydrogel in a semitransparent state with a three-dimensional network structure. Under the effect of shearing force, the three-dimensional network structure is easily damaged. After the external force is removed, the network structure can spontaneously reconstruct and the shearing-recovering performance is excellent. Carboxyl and hydroxyl on sodium alginate molecular chain are combined with red blood cells and the red blood cells can be covered in a network in the spontaneous reconstruction process of the extruded three-dimensional network structure, so that the hydrogel can be used for hemostasis without other drug component, the hemostasis speed is higher and the effect is better. Meanwhile, the energy storage modulus is high, the thixotropy is excellent and the method is suitable for 3D printing quick forming of biological material product.
Owner:QINGDAO UNIV
Method for producing filter material for removing fluorine from drinking water
ActiveCN101913584BRaw materials are cheap and easy to getSimple preparation processWater contaminantsWater/sewage treatmentCalcium hydroxideWater discharge
The invention discloses a method for producing a filter material for removing fluorine from drinking water. In the method, cheap industrial calcium hydroxide and phosphoric acid are used as raw materials to synthesize hydroxyapatite under normal pressure and at the temperature of below 100 DEG C, the hydroxyapatite is dehydrated, washed, dried and crushed to form hydroxyapatite powder, a pore-forming agent, a forming agent and a binding agent are added into the hydroxyapatite powder to make the hydroxyapatite powder to small spheres with a diameter of 0.5 to 2 millimeters by using a pore-forming process and a ball-forming process, and porous spherical hydroxyapatite fluorine removing filter material is obtained after heating in an oven, drying and setting. The fluorine removing filter material has the characteristics of high capacity, easy regeneration, long service life, smooth water discharge and small resistance. The production method has the characteristics of cheap and easily available raw materials, simple preparation process, simple and easily controllable process parameters, easy large-scale industrial production and easy promotion and application.
Owner:JIANGSU YONGGUAN WATER & WASTERWATER EQUIP CO LTD +1
Modified bentonite-based hydrogel precursor solution for silicate cultural relic protection, preparation method and use method thereof
ActiveCN113354444BImprove bindingGood flexibilityNon-macromolecular adhesive additivesAmide/imide polymer adhesivesPhysical chemistryEngineering
The invention discloses a modified bentonite-based hydrogel precursor solution for silicate cultural relic protection, a preparation method and a use method thereof, and the preparation of the modified bentonite-based hydrogel precursor solution and the deionization of tetramethylethylenediamine Water dilution solution; mix the modified bentonite-based hydrogel precursor solution and the deionized water dilution solution of tetramethylethylenediamine evenly, and mix the modified bentonite-based hydrogel precursor solution with tetramethylethylenediamine. The mixed solution of deionized water dilution solution is applied to the part of the silicate cultural relic to be repaired, the repaired part of the silicate cultural relic is attached to the part to be repaired of the silicate cultural relic, and the modified bentonite-based hydrogel precursor The mixed solution of the solution and the deionized water dilution solution of tetramethylethylenediamine naturally forms a modified bentonite-based hydrogel, which realizes the bonding and repair of silicate cultural relics.
Owner:XI AN JIAOTONG UNIV
Preparation method of konjac flying powder-coated fertilizer
InactiveCN106957504ANo heat lossGood compatibilityFlat articlesAmmonium salt fertilisersPolyvinyl alcoholForced-air
The invention belongs to the technical field of fertilizer preparation and discloses a preparation method of a konjac flying powder-coated fertilizer. The method is characterized by comprising the following steps: (1) selecting raw materials according to the ratio of konjac flying powder to polyvinyl alcohol to water to glycerinum of (3-12)g:15g:300g:9g; (2) pouring the selected polyvinyl alcohol, water and glycerinum into a kneading machine; (3) adding the konjac flying powder to obtain a mixture; (4) extruding the mixture obtained in the step (3) through a screw of the kneading machine, containing the mixture in a polyethylene tray, immediately carrying out curtain coating until the solution is uniformly paved on the tray; (5) carrying out forced air drying on the tray containing the mixture obtained in the step (4) at 50-80 DEG C for 2-3h and forming a film from the mixture in the tray; (6) removing a film to obtain the film which is 0.12-0.2mm in thickness; (7) carrying out film cutting and sealing to prepare a coated fertilizer bag; and (8) carrying out fertilizer filling and sealing to obtain the required konjac flying powder-coated fertilizer. According to the method, the problem of shortage of a deep process technology of the konjac flying powder can be solved, and a factory technology is provided for production of the konjac flying powder-coated fertilizer.
Owner:FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI +1
Whey protein/gelatin edible compound film and preparation method thereof
InactiveCN101746557BConsistent concentrationLow costFlexible coversWrappersNutritive valuesPlasticizer
The invention discloses a whey protein / gelatin edible compound film which belongs to the field of food-packaging materials. The compound film is made from whey protein solution and gelatin solution which are added with plasticizer and blended, wherein the weight ratio between whey protein and gelatin is 1-99:99-1. The thickness of the edible compound film is 80 Mu m to 110 Mu m. The weight percentage concentration of the whey protein solution is 8 percent to 10 percent, and the weight percentage concentration of the gelatin solution is 8 percent to 10 percent. The invention also discloses a preparation method for the compound film. The compound film has a high nutritive value and is cheap, and the mechanical properties of the film can be controlled by regulating the compound proportion ofwhey protein and gelatin in order to adapt to packages for different purposes.
Owner:CHINA AGRI UNIV
A degradable silicon-based hybrid polymer biomedical elastomer and its preparation method
The invention provides degradable silica-based hybrid polymer biomedical elastomer and a preparation method thereof. The degradable silica-based hybrid polymer biomedical elastomer (PCD-POSS) is obtained by preparing PCD prepolymer from citric acid, diol or polyhydric alcohol through thermal polymerization, preparing PCD-g-POSS prepolymer from acid, diol or polyhydric alcohol and POSS through thermal polymerization, dissolving the two types of prepolymer in organic solvent, and adding a cross-linking agent HDI and a catalyst for the cross-linking reaction. The thermal polymerization method used for the method is environmentally friendly, convenient to operate and low in raw material cost. The prepared PCD-POSS has biomimetic viscoelasticity, high chemical strength, good mechanical performance, high biological activity and biological stability, adherency and proliferation of osteoblast and soft tissue cells can be remarkably promoted, and the silica-based hybrid polymer biomedical elastomer has good application prospects in the fields of bone tissue and soft tissue regeneration and medicine transportation.
Owner:XI AN JIAOTONG UNIV
A kind of hydrogel material for 3D bioprinting and its preparation method and application
ActiveCN106474560BGood compatibilityImprove structural stabilityAdditive manufacturing apparatusProsthesisHigh cellSolvent
Owner:JINAN UNIVERSITY
Ni-based alloy oil sleeve manufacturing method for high-acidity deep well
ActiveCN101613833BLow costImprove high temperature corrosion resistanceDrilling rodsRoll mill control devicesSolution treatmentImpurity
The invention relates to a manufacturing method of a Ni-based alloy oil sleeve for a high-acidity deep well, which comprises the following components in percentage by mass: less than or equal to 0.02 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, less than or equal to 0.5 percent of Si, less than or equal to 1.0 percent of Mn, 40 to 60 percent of Ni, 20 to 30 percent of Cr,1 to 10 percent of Mo, 1 to 5 percent of W, 0 to 5 percent of Co, 0.1 to 3.0 percent of Cu, 0.01 to 0.5 percent of Al, less than or equal to 0.01 percent of O, less than or equal to 1.5 percent of Ti, and the balance of Fe and inevitable impurities. In the invention, the thermal extrusion processing performance and corrosion resisting performance of the alloy are effectively ensured by controlling the contents of the Al and O. The 90 to 140 ksi steel-grade Ni-based alloy oil sleeve meeting different well depth requirements of high-acidity oil fields and gas fields is manufactured by thermal extrusion, 1,050-1,150 DEG C of solution treatment and cold rolling of the smelted and forged blanks.
Owner:BAOSHAN IRON & STEEL CO LTD
A scar repair material and preparation method thereof
ActiveCN110237054BImprove securityGood biocompatibilityOrganic active ingredientsPharmaceutical non-active ingredientsBiocompatibilityPerylene derivatives
Owner:BLOOMAGE BIOTECHNOLOGY CORP LTD
A biomimetic hydroxyapatite powder/gelatin/sodium alginate composite 3D printing scaffold and preparation method thereof
ActiveCN111097068BOptimal Control StructureGood biocompatibilityAdditive manufacturing apparatusTissue regeneration3d printEngineering
The invention discloses a bionic hydroxyapatite powder / gelatin / sodium alginate composite 3D printing support and a preparation method thereof. The preparation method of the biomimetic 3D scaffold includes: (1) preparation of hydroxyapatite powder with biomimetic hierarchical structure; (2) preparation of hydroxyapatite powder / gelatin / sodium alginate composite slurry; (3) biomimetic Preparation of 3D printed scaffolds. The invention uses 3D printing technology to prepare the machine / inorganic composite 3D printed scaffold with controllable external dimensions, good biocompatibility, and fully simulates the composition and multi-level structure of natural bone tissue, endowing the material with controllable mechanical strength ; The micro-nano multi-level structure of the composite scaffold has high osteogenic activity and osteoinductivity, and the multi-level porous structure can effectively induce the growth of tissues and blood vessels, and promote the regeneration and repair of bone tissue.
Owner:SOUTH CHINA UNIV OF TECH
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