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114results about How to "Low elastic modulus" patented technology

Flexible ecological comprehensive supporting system for expansive soil side slope

The invention belongs to the technical field of rock-soil side slope protection, and particularly relates to an expansive soil side slope flexible ecological comprehensive supporting system which comprises an intercepting ditch, a vegetation protection layer, a composite waterproof layer, flexible anchor rods, water seepage and drainage pipes, cultivation and planting soil, a drainage ditch, a backfill soil layer, a step-shaped slope surface, a slope surface and slope protection vegetation. The slope surface is excavated into a step-shaped slope surface, a composite waterproof layer, expansive soil backfill soil, a vegetation protection layer and cultivation and planting soil are sequentially arranged on the step-shaped slope surface from bottom to top, and slope protection vegetation is planted and formed on the cultivation and planting soil; the composite waterproof layer is fixed to the step-shaped slope face through the flexible anchor rods. The vegetation protection layer and the slope protection vegetation together reinforce the shallow soil body, and the composite waterproof layer and the flexible anchor rod play a role in absorbing and relieving the received expansive force. The method has an ecological greening effect, has the functions of common supporting of the shallow surface layer and the deep layer of the expansive soil slope, flexible reinforcement and expansion reduction and allowable generation of a small amount of deformation, is simple in construction and high in efficiency, and can realize long-term stability of the shallow surface layer and the deep layer of the expansive soil slope.
Owner:WUHAN ENGINEERING CO LTD OF CHINA RAILWAY SEVENTH GROUP

Fan blade real-time monitoring system

The invention discloses a fan blade real-time monitoring system, which comprises a plurality of sensing modules arranged on the surface of a fan blade, and is characterized in that each sensing module is provided with a plurality of sensing units and is used for monitoring the multidirectional linear strain of a single measuring point and calculating the direction alpha 0 and the size of the maximum main strain epsilon max and the minimum main strain epsilon min of the measuring point; the sensing module arranged at the root of the fan blade is composed of a plurality of desensitization type sensing units, and the sensing modules arranged at other parts of the fan blade are composed of a plurality of sensitization type sensing units; the sensing unit comprises a fiber bragg grating; the fiber bragg grating is adhered to the surface of the fan blade through a substrate; the substrate comprises a pasting section A and a non-pasting section B. The width of the section A of the desensitization type sensing unit is larger than that of the section B of the desensitization type sensing unit, and the width of the section A of the sensitization type sensing unit is smaller than that of the section B of the sensitization type sensing unit. The invention provides an optical fiber sensing monitoring system which is low in cost, long in service life and capable of realizing high-precision real-time monitoring on complex stress on the surface of a blade under the condition of complex external force.
Owner:NANTONG INST OF TECH

Heat treatment method of high-strength and high-plasticity Ti-Nb-O titanium alloy

The invention discloses a heat treatment method of a high-strength and high-plasticity Ti-Nb-O titanium alloy, the titanium alloy comprises three elements of Ti, Nb and O, and the components comprise 13-22 wt% of Nb, 0.3-0.9 wt% of O and the balance Ti and inevitable impurities; through the design of a solid solution and aging heat treatment scheme, Nb and O elements in the structure are reasonably distributed in an alpha phase and a beta phase, finally, the alloy structure is controlled to contain the alpha phase and the beta phase, and a large number of nanometer martensite domains exist in the beta phase; the tensile strength of the alloy can reach 1100 MPa or above, the ductility is larger than 15%, and the elasticity modulus is smaller than 65 GPa. The high-strength and high-plasticity Ti-Nb-O titanium alloy has the characteristics of high strength, high plasticity, low elastic modulus, excellent biocompatibility and the like, is simple in component, reduces the preparation difficulty and cost, has important theoretical significance and engineering value, and is suitable for manufacturing biological implantation medical devices.
Owner:FANG KEXING (GUANGZHOU) METAL MATERIAL TECHNOLOGY CO LTD +1

Performance regulation and control method for hole structure of laser 3D printing high-entropy alloy support

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.
Owner:恒利智造(云南)科技有限公司 +1

Antifouling and self-repairing non-isocyanate polyurethane coating and preparation method thereof

The invention discloses an antifouling and self-repairing non-isocyanate polyurethane coating and a preparation method thereof, the preparation method comprises the following steps: preparation of polycyclic carbonate resin: adding anhydride and polyol into an organic solvent, uniformly mixing, reacting at 100-150 DEG C for 3-5 hours until the acid value is constant, and cooling to room temperature; adding glycerol carbonate, refluxing with xylene, reacting at 180-210 DEG C until the acid value is lower than 3.0 mgKOH / g, cooling to room temperature, washing with water for 2-3 times, and removing the solvent to obtain polycyclic carbonate resin; and preparation of the polyamine curing agent: mixing polyamine, amino-terminated polydimethylsiloxane and an amine compound containing disulfide bonds, and uniformly stirring to obtain the polyamine curing agent. The preparation method disclosed by the invention has the advantages of simple synthesis and low cost, and meanwhile, the prepared non-isocyanate polyurethane coating has good self-repairing property, pollution resistance and corrosion resistance.
Owner:SOUTH CHINA UNIV OF TECH

Novel TPMS porous structure interbody fusion cage

The invention provides a novel TPMS porous structure interbody fusion cage, and relates to the technical field of medical materials. The interbody fusion cage is designed by using a porous frame structure with different unit cell sizes and porosities, so that the biocompatibility of the interbody fusion cage is enhanced, the interbody fusion cage has higher mechanical properties, large static compression load and low elastic modulus, the elastic modulus is closer to that of human cortical bones, the stability of an implant in the early stage of osseointegration is improved, and the interbody fusion cage is suitable for being used in the field of osteosynthesis. Under the same porosity, the elastic modulus is lower, and the comprehensive performance is excellent.
Owner:SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI

Antibacterial magnetic compatible medical beta-type Zr-Nb-Cu alloy and preparation method thereof

The invention discloses an antibacterial magnetic compatible medical beta-type Zr-Nb-Cu alloy and a preparation method thereof. The alloy is prepared from, by mass, 18%-24% of Nb, 4%-10% of Cu and the balance Zr and inevitable impurity elements. The preparation method of the alloy comprises the following steps: 1, weighing sponge zirconium, copper and niobium particles as raw materials; 2, putting the raw materials into a water-cooled copper crucible, vacuumizing, introducing argon, and smelting in a non-self-consumption vacuum arc furnace; according to the beta-type Zr-Nb-Cu alloy, alloying elements Nb and Cu are selected, the strength, hardness, abrasion resistance and corrosion resistance of the alloy are improved while the elasticity modulus of the alloy is reduced, the lasting and efficient antibacterial performance of the alloy is guaranteed, the influence of postoperative bacterial infection and MRI detection artifacts is remarkably reduced, and therefore the beta-type Zr-Nb-Cu alloy has the lower elasticity modulus and magnetic susceptibility, and the service life of the alloy is prolonged. And the method is more suitable for human skeleton and nuclear magnetic resonance (MRI) detection.
Owner:XIAN RARE METAL MATERIALS RES INST CO LTD

Construction method of vibration reduction and isolation system for relieving influence of industrial vibration on surrounding buildings

The invention discloses a construction method of a vibration reduction and isolation system for relieving the influence of industrial vibration on surrounding buildings. The construction method comprises the following steps that firstly, an industrial vibration source and the surrounding buildings are determined; 2, designing a vibration isolation trench; 3, excavating a vibration isolation trench; 4, loose soil bodies are removed, and soil residues are cleaned; 5, heating the modified asphalt, and heating and stirring the modified asphalt and the added hemp knife; sixthly, the improved asphalt hemp mixture is poured into the vibration isolation trench to be filled layer by layer; 7, naturally cooling and curing the mixture; and 8, sealing the vibration isolation trench by adopting a rubber cover plate. The vibration isolation ditch for pouring the improved asphalt hemp mixture is arranged between the industrial vibration source and the building, the propagation path of vibration waves generated by the industrial vibration source is changed, the energy of the vibration waves is consumed, the vibration reduction and isolation energy consumption efficiency of the vibration reduction and isolation system is greatly improved, vibration disasters of industrial vibration to surrounding houses are effectively relieved, and the service life of the vibration reduction and isolation system is prolonged. And meanwhile, industrial production is not affected, and the method has creative engineering significance and has the practical value of simple construction process and low cost.
Owner:SHAANXI ACAD OF ARCHITECTONICS +1

Low-viscosity solvent-free epoxy resin cementing material as well as preparation method and application thereof

The invention provides a low-viscosity solvent-free epoxy resin cementing material as well as a preparation method and application thereof. The solvent-free epoxy resin cementing material comprises the following components in parts by weight: 100 parts of solvent-free modified epoxy resin, 5-100 parts of a curing agent, 5-40 parts of a viscosity regulating agent, 0.2-5 parts of a curing regulator, 0-20 parts of a toughening material and 0.1-1 part of a defoaming agent. The cementing material disclosed by the invention has the characteristics of relatively low viscosity, wide applicable temperature range, high strength, low elastic modulus, excellent mechanical property, good toughness, good corrosion resistance, good aging resistance and the like, and good sealing capability on cement sheath microcracks; and the requirement for annulus under-pressure treatment under the complex working conditions of deep wells, ultra-deep wells, complex natural gas wells, gas storage wells, CCUS wells and the like can be met, and the application market is wide.
Owner:CHINA NAT PETROLEUM CORP +1

Impermeable wall concrete for water conservancy and hydropower engineering and preparation method

The invention relates to diaphragm wall concrete for water conservancy and hydropower engineering and a preparation method, and the diaphragm wall concrete comprises water, a polyacrylate emulsion, a cementing material, a coarse aggregate, a fine aggregate, a water reducing agent, a defoaming agent, an air entraining agent, synthetic fibers and inevitable impurities. The mass ratio of the sum of the water and the polyacrylate emulsion to the binding material is 0.30-0.40, and the use amount of the coarse aggregate is 900-1100 kg / m < 3 >; the use amount of the fine aggregate is 600-850kg / m < 3 >, and the sand ratio is 40-46%; the doping amount of the polyacrylate emulsion is 5-20% of the mass of the cementing material; the mixing amount of the water reducing agent is 0.6%-1.2% of the mass of the cementing material; the mixing amount of the defoaming agent is 0.8%-1.5% of the mass of the cementing material; the mixing amount of the air entraining agent is 0.2 / 10000-0.5 / 10000 of the mass of the cementing material; the mixing amount of the synthetic fibers is 0.5%-2.0% of the total volume of the concrete for the diaphragm wall.
Owner:POWERCHINA HUADONG ENG CORP LTD +1

High-precision quartz crystal vibrating beam accelerometer

A high-precision quartz crystal vibrating beam accelerometer comprises a base, a meter core and a shell, a circuit board is packaged in the base, and the meter core is packaged on the base through the shell; the meter core comprises a mass pendulum, two resonant beams and two circular damping plates which are all made of quartz crystal materials; the mass pendulum comprises two semicircular bases, two semicircular pendulum tongues and a circular flexible layer, the two semicircular bases and the two semicircular pendulum tongues are symmetrically bonded to the two sides of the circular flexible layer respectively, and receding gaps are formed between the semicircular bases and the semicircular pendulum tongues; the resonant beam is radially arranged above a strip-shaped groove in the center of the outer end surface of the semicircular base, one end of the resonant beam is bonded with the semicircular base, and the other end of the resonant beam is bonded with the semicircular swing tongue and electrically connected with the circuit board; the two circular damping plates are connected to the two sides of the two semicircular bases in a semi-symmetrical bonding mode through the inner end faces, the resonance beams are located in strip-shaped holes of the circular damping plates, and the semicircular concave tables and the semicircular swing tongues are opposite to form vibration gaps.
Owner:SHAANXI AEROSPACE TIMES NAVIGATION EQUIP CO LTD

High-elasticity waterproof skin-touch tablecloth based on flexible polymer and preparation method thereof

The invention provides a high-elasticity waterproof skin-touch tablecloth based on a flexible polymer and a preparation method thereof. The tablecloth is made of a polyurethane composition, comprises a modified polyurethane material, amino siloxane, graphene, a light stabilizer, a flexible plasticizer and the like, and has excellent elasticity, waterproofness, antistatic property and soft touch feeling. The preparation method comprises the following steps: firstly, mixing the modified polyurethane material with amino siloxane, then adding graphene and other additives, and molding under a calendering process. Through the design, the touch feeling, durability and environmental protection performance of the tablecloth are improved, and the tablecloth is suitable for high-quality household products.
Owner:XINGYUAN HLDG CO LTD

Tape

This tape (10) has a substrate layer (12) and a pressure-sensitive adhesive layer (11) on one surface of the substrate layer (12), and has an elongation at break of 100% or more and an elastic modulus of 2 GPa or less. The tape (10) has, after having heated at 230°C for 80 seconds, an elongation at break of 100% or more and the elastic modulus of 2 GPa or less.
Owner:ZACROS CORP

Pressure-torsion tactile sensor and preparation method thereof

According to the pressure-torsion tactile sensor and the preparation method thereof, in the sensor, the upper surface of a sensor base body is provided with a sensor base inner locking ring protruding upwards; the Hall element is nested in the sensor base body, the magnet framework comprises a cylinder arranged on the lower portion and a plate-shaped structure located at the top of the cylinder, a groove is formed in the cylinder, embedded protrusions are arranged on the periphery of the plate-shaped structure, and the cylinder is connected with an inner locking ring of the sensor base in a locking mode so as to be prevented from being interfered by tangential force; the magnet is arranged in the groove; the flexible resin sensing layer is provided with positioning grooves used for being matched with the embedded protrusions so as to be connected with the flexible resin sensing layer and the magnet framework. The silicone rubber elastomer is nested in the sensor base body and is bonded between the flexible resin sensing layer and the sensor base body so as to be compressed or twisted based on external force or torque transmitted by the flexible resin sensing layer, so that the spatial position of the magnet framework is changed, and the magnet moves and rotates up and down; the RTV anti-skid layer is connected to the flexible resin sensing layer.
Owner:XI AN JIAOTONG UNIV

Co-modified silicones

The present invention provides a novel co-modified silicone or the like. A co-modified silicone which contains a structure containing a phenolic hydroxyl group and a polyether structure in a molecule.
Owner:DOW TORAY CO LTD

Anisotropic conductive adhesive film with low modulus after curing and a preparation method thereof

This invention relates to the field of electronic component packaging materials technology, and discloses an anisotropic conductive film with low elastic modulus after curing and its preparation method. The conductive film comprises the following components by weight: 35-80 parts of compounded epoxy resin; 50-90 parts of compounded acrylate monomers; 1-10 parts of conductive particles; 10-20 parts of fumed silica; 1-10 parts of phosphate methacrylate; 1-8 parts of silane coupling agent; 1-10 parts of surface leveling agent; and 3-15 parts of initiator. The compounded epoxy resin is a blend of hydrogenated bisphenol A type epoxy resin and bisphenol F type epoxy resin; the compounded acrylate monomers are a blend of hydroxyethyl methacrylate, trimethylolpropane triacrylate, and ethylene glycol diacrylate. The conductive film of this invention has a low elastic modulus after curing, which can directly reduce the internal stress generated during cooling and shrinkage, resulting in better reliability of the ACF and stable performance in environmental testing.
Owner:SUZHOU XINDAO ELECTRONIC TECH CO LTD

Synthetic leather fabric with net structure

The synthetic leather fabric comprises a fabric body, a reinforcing layer is arranged in the fabric body, a wear-resistant layer is arranged on the outer side of the reinforcing layer and located in the fabric body, a middle layer is arranged at the end, away from the wear-resistant layer, of the outer side of the reinforcing layer, and a comfortable layer is fixedly connected to the bottom of the middle layer. The reinforcing layer is used for reinforcing the strength of the fabric main body; the wear-resistant layer is used for improving the wear resistance of the fabric main body; the comfortable layer is used for improving the use comfort of the fabric body, the reinforcing layer is composed of first connecting lines and second connecting lines, the multiple sets of first connecting lines are located in the fabric body, and the multiple sets of second connecting lines are located in the fabric body and located on the outer sides of the first connecting lines. The wear-resistant synthetic leather fabric has the beneficial effects that the wear-resistant effect and the tensile strength of the synthetic leather main body are improved, the probability that the synthetic leather main body is worn is reduced, and the overall practicability of the synthetic leather fabric is improved.
Owner:HAINING JIESHENG NEW MATERIAL

Modified polylactic acid chopped fiber suitable for spunlace non-woven fabric and manufacturing method of modified polylactic acid chopped fiber

The invention relates to the technical field of fibers, in particular to a modified polylactic acid chopped fiber suitable for spunlace non-woven fabric and a manufacturing method of the modified polylactic acid chopped fiber. The modified polylactic acid chopped fiber comprises 90 to 95 wt% of polylactic acid, 5 to 8 wt% of epoxy grafted polylactic acid, 1 to 2 wt% of polyphosphate, 0.2 to 0.5 wt% of an external lubricant, 0.1 to 0.2 wt% of a heat stabilizer and 0.3 to 0.4 wt% of an anti-hydrolysis agent. According to the invention, the heat stability of the polylactic acid is improved, the thermal degradation of the polylactic acid in the melting processing heat process is inhibited, the viscosity of the polylactic acid melt tends to be consistent, the spinning stability is improved, and the consistency of the fiber diameter is ensured; the hygrothermal aging performance of the polylactic acid is improved. The crystallinity of the polylactic acid in the spinning process is reduced, but the tensile strength of the polylactic acid is still kept.
Owner:ZHEJIANG RUIWEI NEW MATERIAL TECHNOLOGY CO LTD

Salt-resistant toughness self-repairing cement paste system for salt-cavern gas storage and preparation method of salt-resistant toughness self-repairing cement paste system

The invention relates to the technical field of salt-cavern gas storage drilling, in particular to a salt-resistant toughness self-repairing cement paste system for a salt-cavern gas storage and a preparation method of the salt-resistant toughness self-repairing cement paste system. The cement paste system comprises the following components in parts by mass: 65-90 parts of G-grade cement, 10-35 parts of a superfine active material, 4-10 parts of a toughening material, 3-10 parts of a cementing enhancer, 1-5 parts of a salt-resistant fluid loss agent, 0.5-3 parts of a low-temperature early strength agent, 0.1-0.5 part of a high-efficiency dispersant and 0.2-1 part of a defoaming agent, 0.5-5 parts of an expanding agent and 40-48 parts of a semi-saturated NaCl aqueous solution. The cement paste system not only has good salt resistance, elasticity and toughness, but also has the characteristics of micro-expansion, strong cementation, self-repairing and the like, so that the cement paste system is particularly suitable for the salt-cavern gas storage, the well cementation quality of the salt-cavern gas storage can be effectively improved, and the shaft integrity of the salt-cavern gas storage in a frequent strong injection and production period is guaranteed.
Owner:PIPECHINA SOUTH CHINA CO +1

A method for preparing a medical porous titanium alloy implant

The present invention discloses a method for preparing a medical porous titanium alloy implant, and belongs to the technical field of biomedical material preparation. The biomaterial of the present invention is a honeycomb porous titanium alloy, and the side length of the honeycomb unit structure is 0.4-0.7mm, and the wall thickness is 0.2-0.3mm; the porosity is about 50-80%, and the method is to use the selective laser melting technology for 3D printing. The elastic modulus of the porous titanium alloy biomaterial prepared by the present invention is low (12.1-14.7GPa) and high strength (439.3-697.5MPa); the mechanical properties of the porous implant fit the human bone, which can eliminate the harm caused by stress shielding, and provide growth space for the growth of bone tissue, increase the biological activity of the implant, and can be completely used for human body tissue replacement and repair. The method of the present invention can not only effectively solve the problem of stress shielding and extend the service life of the implant; but also can provide new means for the design and manufacture of personalized medical products, which is of great significance to improving the success rate of the implant.
Owner:KUNMING UNIV OF SCI & TECH

A bracket assembly and an automobile

The bracket assembly and automobile of this application belong to the field of automotive technology. The bracket assembly includes a support plate and a support frame. The support frame has a support body and a hollow area. The support body spans across both ends of the support plate along its length. The hollow area and the support body are arranged along the width of the support plate. The support frame is fixed to the support plate. The elastic modulus of the material of the support frame is greater than that of the material of the support plate, and the density of the material of the support plate is less than that of the material of the support frame. The bracket assembly and automobile of this application, on the one hand, can reduce the probability of vibration and abnormal noise of the rear shelf during vehicle operation, and the rear shelf, supported by the bracket assembly, can bear a larger weight to better realize the storage function of the rear shelf. On the other hand, the bracket assembly composed of the support plate and the support frame has a lighter structural weight, which can reduce the overall vehicle weight.
Owner:AVATR CO LTD

A single layer soft dental film for dental treatment or oral protection and method

This invention discloses a single-layer soft dental membrane and method for dental treatment or oral protection, belonging to the field of dental materials technology. The membrane is made of thermoplastic polyurethane elastomer (TPU) with a microphase separation structure and a hydrophilic modified layer containing polydopamine and hydrophilic polymer on its surface. The membrane has a Shore hardness of 75A-90A, a tensile strength of 15-50MPa, an elongation at break ≥500%, and a thickness of 0.5-6.0mm. The preparation method includes TPU drying, extrusion molding, plasma treatment, and hydrophilic coating impregnation reaction. The membrane of this invention has flexibility, durability, antibacterial properties, and high transparency, and its comprehensive performance is superior to that of existing EVA membranes. It can be used in dental whitening trays, sports mouthguards, or oral ulcer protection patches.
Owner:NINGBO MICHI TECH CO LTD

Fluorine-lined pipe with temperature-resistant and deformation-resistant structure

The utility model relates to a kind of fluorine-lined pipeline with temperature-resistant anti-deformation structure, the fluorine-lined pipe of its inner layer, fluorine-lined pipe is made of polytetrafluoroethylene material, its inner wall is smooth, for transporting corrosive medium;The reinforcing structure layer of middle layer, reinforcing structure layer includes high-strength steel wire framework spirally wound along the length direction of fluorine-lined pipe, and high-temperature resistant resin material filled in the gap of steel wire framework, steel wire framework and high-temperature resistant resin material solidification are integrated, to enhance the compression resistance and anti-deformation ability of pipeline;The protective layer of outer layer, protective layer is the outer tube of stainless steel material, outer tube is tightly set in the outside of reinforcing structure layer, for protecting internal structure and further improving the overall strength of pipeline, heat insulation buffer layer is set between fluorine-lined pipe and reinforcing structure layer, heat insulation buffer layer is ceramic fiber felt material, its thickness is 5-10mm, by this design, the heat conductivity coefficient of ceramic fiber felt still keeps low level with temperature rise, 5mm thickness can make heat conduction efficiency reduce more than 60%.
Owner:JIANGSU TEFLON ANTICORROSION TECHNOLOGY CO LTD

Display module and display device

ActiveCN118053354Breduce manufacturing costReduce processing technology
The application discloses a display module and a display device. The display module comprises a display panel and a support assembly. The support assembly is arranged on the non-light-emitting side of the display panel. The support assembly comprises a first support layer and a second support layer connected with each other. The orthographic projection of the first support layer on the display panel covers two non-bending areas. The orthographic projection of the second support layer on the display panel covers at least a bending area. The elastic modulus of the second support layer is smaller than that of the first support layer. In the related art, the support layer made of an integral metal material is replaced by the first support layer and the second support layer with different elastic modulus. Since the second support layer itself has the characteristics of low elastic modulus and easy processing, it does not need to be provided with a hollow pattern, the complex processing technology of the integral metal film material can be omitted, the production cost of the module is greatly reduced, and the requirement of a large-size screen is met.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

HfC-coated SiC-coated C core-shell type nanopowder and preparation method thereof

ActiveCN119118672AImprove wetting behaviorImprove wetting powerMaterials scienceSurface modification
The invention relates to HfC-coated SiC-coated C core-shell nanopowder and a preparation method thereof, belongs to the technical field of surface modification of ultrahigh-temperature ceramic powder, and solves the technical problems of long process period, high cost and difficulty in ensuring coating uniformity of a process for coating carbon on the surfaces of ultrahigh-temperature modified silicon carbide ceramic particles. Preparing a modified HfC coupling solution; adding resorcinol into the modified HfC coupling solution, and stirring to obtain an intermediate solution; sequentially adding formaldehyde and ammonia water, and stirring until phenolic aldehyde is formed to obtain a cross-linked mixed solution; the cross-linked mixed solution is centrifugally dried, centrifugally dried powder is placed into ethyl alcohol and deionized water to be cleaned, the cleaned powder is dried and cured, and HfC-coated RF powder is obtained; and cracking the HfC-coated RF powder to obtain the HfC-coated SiC-coated C core-shell type nano powder. The preparation method is used for preparing the core-shell type nano powder.
Owner:SDIC CERAMIC MATRIX COMPOSITES RES INST (XIAN) CO LTD

Well cementation cement slurry and preparation method and application thereof

The invention provides well cementation cement paste as well as a preparation method and application thereof. The well cementation cement paste comprises oil well cement, an active material, hollow glass microspheres, a corrosion-resistant material, a tough material, a suspending agent, a dispersing agent, a fluid loss agent, a retarder, a defoaming agent and water, the density of the well cementation cement slurry is 1.2 to 1.6 g / cm < 3 >. The preparation method comprises the following steps: (1) mixing oil well cement, an active material, hollow glass microspheres, a corrosion-resistant material, a tough material, a suspending agent, a dispersing agent and a fluid loss agent to obtain a dry mixture; (2) mixing a retarder, a defoaming agent and water to obtain wet mixed liquid medicine; and (3) mixing the dry mixed material and the wet mixed liquid medicine to obtain the well cementation cement slurry. The well cementation cement paste provided by the invention realizes high-quality rapid well building, ensures long-term sealing integrity of a cement sheath, and provides powerful technical support for large-scale exploration and development of high-sulfur-content natural gas wells and CCUS wells and reduction of wellhead gas blow-by and annulus pressure risks.
Owner:CHINA NAT PETROLEUM CORP +1

Adhesive and adhesive sheet

The present invention provides an adhesive capable of achieving both a high refractive index and a low elastic modulus. The present invention provides adhesives comprising a base polymer and a high refractive index additive (A). The high refractive index additive (A) is a compound having an asymmetric structure. The content of the high refractive index additive (A) is 30 parts by weight or more with respect to 100 parts by weight of the base polymer. The adhesive has a refractive index of 1.50 or more.
Owner:NITTO DENKO CORP

Environment-friendly adhesive tape for folding screen and preparation process thereof

The present application relates to the field of high polymer materials, in particular to an environment-friendly adhesive tape for folding screen and a preparation process thereof. According to the requirements of low-temperature bending resistance, high-temperature viscosity and cohesion of flexible foldable mobile phones, a bio-based acrylate block copolymer with extremely low glass transition temperature and high glass transition temperature is designed, and through the regulation of soft and hard segment ratio, molecular weight and curing agent, the adhesive layer meets certain modulus and adhesion requirements, meets the requirements of low-temperature flexibility, high-temperature cohesion, high-temperature peeling without residual glue, and cutting without glue overflow of the bio-based acrylate copolymer adhesive layer, and solves the problems of macroscopic phase separation due to compatibility problems in conventional blending method, resulting in poor appearance and insufficient adhesion, low-temperature flexibility and poor reliability, and the bio-based ultra-thin double-sided adhesive tape uses bio-based raw materials which are easy to biodegrade in the adhesive layer, and improves the problems of difficult degradation, high pollution and high toxicity of petroleum-based adhesive layers.
Owner:SHICHEN MATERIAL TECH (SHANGHAI) CO LTD +1

Aluminosilicate glass with high strength, high modulus and fracture resistance and preparation method and application thereof

The invention discloses a high-strength, high-modulus, fracture-resistant aluminosilicate glass, a preparation method and an application thereof, wherein the molar percentage of the raw material components is 55%-70% of SiO 2 , 7%-15% Al 2 O 3 , 0%-5% B 2 O 3 , 6%-15% Na 2 O, 0-10% K 2 O, 0-10% MgO, 0.5-2% P 2 O 5 , 0.1% to 1% SnO and 0.3-1.5% of a modifying additive are mixed evenly, and then melted, homogenized, formed, clarified and annealed to obtain a high-strength, high-modulus, fracture-resistant glass. The aluminosilicate glass prepared according to the above components has high strength, high elastic modulus and fracture toughness, and has better anti-fragmentation ability, thereby broadening the application range of aluminosilicate glass.
Owner:CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD +1