198results about How to "Improve mechanical strength" patented technology

There are provided a sealing insulating film that is formed on a substrate and melted at a first heating temperature to have a flowability, and external terminals that are formed on the substrate, and connected to other electronic device at a second heating temperature higher than the first heating temperature, and surrounded by the sealing insulating film.

There is provided an antireflective laminate having a low refractive index and excellent mechanical strength, which comprises a coating layer of an ionizing radiation curing-type resin composition comprising ionizing radiation curing group-containing hollow silica fine particles. The antireflective laminate comprises a light transparent base material and at least a low refractive index layer having a refractive index of not more than 1.45 provided on the light transparent base material, wherein the low refractive index layer comprises an ionizing radiation curing-type resin composition and silica fine particles having an outer shell layer with the interior of the silica fine particles being porous or void, and, for a part or all of the silica fine particles, at least a part of the surface of the silica fine particle has been treated with an ionizing radiation curing group-containing silane coupling agent.

Magnetically and electromagnetically driven MEMS devices for reflecting light signals and for switching radio frequency (RF) signals are provided. In a preferred embodiment, a light reflecting device such as a mirror or micro-scanner comprises a plate operative to reflect light and at least two conductive flexural actuators connected to the plate and to a substrate and operative to impart a rotation or tilt motion to the plate under a force arising from the interaction of a current passing through the conductive flexural actuators and a magnetic field parallel to the substrate. An RF switch comprises a substrate and a membrane having a longitudinal dimension and a lateral dimension, the membrane positioned substantially parallel to and attached to the substrate and operative to provide at least two switching positions in response to actuation by a Lorenz force acting on it.

The invention discloses a thermoplastic light compound plate and the manufacturing method, characterized in that it comprises acupuncture fiber carpet dipped in double faced foam of thermoplastic glue liquid and thermoplastic glue liquid layer coated on the surface, the density of compound plate is 0.35-0.90g/cm3, the weight of fiber scattered in bunchiness is 15-45% of acupuncture fiber carpet. The merit of invention is very remarkable. Special super long fiber and bunchiness fiber with certain proportion are maintained in the material so that the mechanical performance of material can be improved. In addition, the material is provided with foam structure, very good effect of heat and sound insulation. The invention is also provided with environmental protection and recovery.

The carrier including a plurality of storage sections for individually accommodating electronic parts and a plurality of connecting sections for connecting the adjacent storage sections with each other. Each storage section is provided with a bottom wall and a side wall for defining a recess, and a support section for supporting the electronic part. The support section includes one rib continuously extending on the bottom wall along a generally rectangular profile, and a plurality of columnar projections projecting from the bottom wall to a height generally identical to one another and lower than a height of the rib. The bottom wall includes a first surface extending between the side wall and the rib to define a first region of the recess, and a second surface extending inside the rib to define a second region of the recess shallower than the first region. The columnar projections are arranged in a distributed manner on the second surface of the bottom wall. The bottom wall is locally thickened at portions corresponding to the rib and the columnar projections.

A process for preparing a binder which comprises a heterocondensate of silicon compounds and metal and/or boron compounds. The process comprises mixing a silicon component which comprises (A), at least one hydrolyzable silicon compound having a non-hydrolyzable polymerizable group, with water to form a hydrolysis product, and 15 s to 15 min after mixing (A) with water, the addition of (B), at least one compound of boron or a metal selected from Al, Ga, In, Tl, Ge, Ga, Sn, Pb, Ti, Zr, Hf, Sc, Y and La.

A semiconductor device includes at least three or more wiring layers stacked in an interlayer insulating film on a semiconductor substrate, a seal ring provided at the outer periphery of a chip region of the semiconductor substrate and a chip strength reinforcement provided in part of the chip region near the seal ring. The chip strength reinforcement is made of a plurality of dummy wiring structures and each of the plurality of dummy wiring structures is formed to extend across and within two or more of the wiring layers including one or none of the bottommost wiring layer and the topmost wiring layer using a via portion.

The invention discloses a graphene aerogel material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a precursor solution, namely mixing graphene oxide with a framework filler, and stirring uniformly to obtain the precursor solution; (2) preparing graphene hydrogel, namely adding a catalyst into the precursor solution, stirring uniformly, then pouring into a mold containing reinforcing fibers, sealing the mold, and heating the mold for reaction, thereby obtaining fiber reinforced graphene hydrogel; (3) preparing graphene ketone gel, namely putting the graphene hydrogel into an acetone solution to perform solvent replacement so as to obtain the graphene ketone gel; and (4) preparing graphene aerogel, namely taking out the graphene ketone gel, and drying to obtain a fiber reinforced graphene aerogel material. The invention also relates to the graphene aerogel material prepared by the method, and the graphene aerogel material is low in heat conductivity and high in strength, and can be used as a high-temperature heat insulating material.

The invention discloses radar stealth and infrared stealth integrated stealth tarpaulin and a making method thereof. The radar stealth and infrared stealth integrated stealth tarpaulin and the making method thereof are mainly used for achieving stealth of modern weapons such as vehicle-mounted guided missiles, tanks and aircrafts and improving the survival capacity, the defense penetration capacity and the deep strike capacity of the weapons. The integrated stealth tarpaulin comprises a camouflage layer, a radar and infrared integrated stealth layer and a base layer in sequence from outside to inside. The radar and infrared integrated stealth layer is formed by polymerizing silicon carbide fiber cloth and aniline in situ and has not only the wave absorption stealth performance but also antistatic property, high temperature resistance and flame retardant property. The surface of a radar absorption layer is coated with an infrared wave absorbing coating in a coating finishing mode. The tarpaulin is cut and sewn in a three-dimensional mode according to different application types. The integrated stealth tarpaulin can achieve the functions of radar stealth and infrared stealth at the same time, and has the advantages of being antistatic, flame-retardant, high in mechanical strength, flexible, wash-resistant and breathable, and convenient to produce.

The invention discloses a preparation method of telescopic MXene/graphene composite aerogel with a high electromagnetic shielding effect. According to the method, the three-dimensional netlike composite aerogel with a rich pore structure is formed through compounding MXene and reduced graphene oxide, inducing the reduced graphene oxide and the MXene by utilizing a modifying agent and performing cold and dry treatment. The preparation method disclosed by the invention has the following advantages that the telescopic MXene/graphene composite aerogel with the high electromagnetic shielding effectcan be obtained through uniformly mixing the reduced graphene oxide and MXene dispersing liquid, introducing the modifying agent and finally performing the cold and dry treatment, which reduces the stacking density of the MXene, constructs a new macroscopic appearance, has extremely excellent mechanical property and scalability and promotes the application feasibility of the MXene in aerospace field.

The invention discloses a high performance XNBR rubber containing graphene oxide and its preparation method. The preparation method comprises the following steps: adding graphite oxide into a surface modifier for ultrasonic stripping; carrying out centrifugal separation so as to obtain surface modified single-layer graphene oxide; mixing the single-layer graphene oxide with XNBR rubber latex; then successively adding an anti-aging agent and a flocculant and preparing a rubber mixture by using a co-coagulation method; and adding a vulcanizing agent for vulcanization so as to obtain graphene oxide-containing XNBR vulcanized rubber with high mechanical properties and high thermal conductivity. According to the invention, since the surface modifier is added in the process of stripping, stability and surface tension of graphene oxide suspension are changed, graphene oxide and the latex are allowed be uniformly mixed, and the degree of homodisperse of graphene oxide in a polymer is improved, and therefore, the purpose of improving mechanical strength of XNBR is achieved.

A carbon substrate for a gas diffusion layer that has a porosity gradient in a thickness direction thereof, a gas diffusion using the carbon substrate, an electrode and a membrane-electrode assembly for a fuel cell that include the gas diffusion layer, and a fuel cell including the membrane-electrode assembly having the gas diffusion layer are provided. The gas diffusion layer has improved water discharge ability and improved bending strength both in the machine direction and cross-machine direction.

The invention provides a collagen-based dura on the basis of a process-friendly type ion liquid on-site spinning technology, and a preparation method thereof. The preparation method comprises the steps of: dissolving I type collagen by a novel process-friendly solvent system-ion liquid and sodium salt composite system, fully soaking by taking decellularized pig dermis as a substrate through an electrolyte solution, carrying out electrostatic spinning by taking air as a medium, and regulating the pore structure of collagen fibers by adjusting the electrospinning conditions; removing residual ion liquid with a proper eluent, and carrying out freeze-drying, sterilization and packaging to obtain the collagen-based dura. The collagen-based dura has two or more layers of structures: the aperture of collagen fibers at one side close to brain tissue is controlled to be 3mu m and below, and the aperture of collagen fibers at one side far away from brain tissue is controlled to be 20mu m and above. Compared with the traditional solvent spinning, the preparation method is process-friendly, the toxic and side effects are reduced, and the triple-helical structure of the collagen can be furthest retained.

The invention discloses a polyimide porous membrane including benzimidazole and benzene lateral groups. The structure of the polyimide porous membrane including the benzimidazole and the benzene lateral groups is shown as the formula (I), wherein in the formula, n:m=4:6. The molecular mass of the polymer is 50 thousand to 150 thousand. A novel polyimide porous membrane material which is good in heat-resistant performance and processable performance is designed from the molecular viewpoint and can be widely applied to the fields of battery diaphragms, capacitor diaphragms, air purification, sewage processing, low-dielectric materials, ultrafiltration membranes, protection materials, catalytic carriers and the like.

The invention provides a high-strength addition-type mould rubber composition and a preparation method thereof. The composition comprises high-concentration vinyl silicone oil which can form a local high crosslink density meshwork in the preparing process and play an anchoring role together with vinyl silicone resin and white carbon black in the composition, therefore, the mechanical strength of addition-type mould rubber is improved, the tearing strength can be more than 30 N/m, the mould turning times is significantly increased, the mould turning quality is significantly improved, and the composition can be used for high-precision model making.

Provided is a method for improving mechanical properties of hydrogel fibers by secondary crosslinking. The invention discloses the method for improving the mechanical properties of the hydrogel fibers by secondary crosslinking, and the method is characterized by comprising the steps: preparing a monomer aqueous solution, stirring evenly, then adding a UV initiator with good water solubility, stirring to dissolve completely under a room temperature light-shielding condition, and thus obtaining a spinning prepolymerization solution; extruding the spinning solution from a spray nozzle into water bath through a metering pump, arranging an ultraviolet light point source at an outlet of the spinning solution, under ultraviolet light irradiation, carrying out a free radical polymerization reaction of the dynamically extruded spinning solution monomer, to obtain a hydrogel as-formed fiber; and immersing the as-formed fiber in a water soluble thermal initiator solution prepared in advance, increasing the temperature, and decomposing a thermal initiator to trigger a double-bond containing polymer chain in the as-formed fiber to generate secondary crosslinking, so as to improve the mechanical properties of the gel fiber and expand the application field of the hydrogel.

The invention discloses a calcium phosphate-based bone repair scaffold and a preparation method thereof. Calcium phosphate bone cement is used as a raw material and is combined with a 3D printing technology to obtain a calcium phosphate bone cement scaffold with through macropores; a dopamine solution is used for modifying the surface of the scaffold; dopamine forms a polydopamine layer on the surface of the scaffold through self-oxidation under alkaline conditions; polydopamine has good viscosity and biocompatibility, can be used as an adhering coating layer of BMP-2, improves the content offixed BMP-2, and promotes cell adhesion and proliferation; the BMP-2 loaded on the scaffold can also effectively promote the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells. The prepared calcium phosphate-based bone repair scaffold has through macropores, meets the mechanical strength requirements of cancellous bones, has excellent biocompatibility, can effectively promote bone tissue regeneration, and has potential application value in the field of bone tissue repair.

The invention relates to a composite material of light-degradation antibiotic polylactic acid, which mainly comprises polylactic acid and nanometer TiO2, wherein, the content of polylactic acid is 90.0% to 99.0%, the content of nanometer TiO2 is 1.0%to 10.0%. The process for preparation comprises adding coupling agent to flow back for 2-4 hors under the temperature of 80 DEG C+-10 DEG C after dispersing nanometer TiO2 in methyl ethyl ketone, acetone or triethylamine disperser in ultrasonic, placing in a straight sealing tube with lactide after whizzing and drying, adding accelerating agent, and preparing in 150 DEG C +- 10 DEGC vacuum to polymerize for 2-4 hours. Compared with polylactic acid, the heat decomposition temperature, the glass transformation temperature and mechanical properties of the invention are all greatly improved, and the invention has the functions of antibacterial activity and ultraviolet absorption, the degradation rate is obviously accelerated under the radiation of ultraviolet light and natural conditions, and the invention has complete biodegradability. The composite material of light-degradation antibiotic polylactic acid of the invention adopts an in-situ polymerization, whose processing technology is simple, production cost is low, and application prospect is wide.

The invention discloses a preparation method of a corn alcohol-soluble protein nanofiber membrane used for cell culture. The corn alcohol-soluble protein/polyvinyl alcohol nanofiber membrane is a cell culture carrier material, which comprises biodegradable natural polymer corn alcohol-soluble protein and polyvinyl alcohol as a biocompatible high polymer. The transverse dimension of a ribbon-like corn alcohol-soluble protein/polyvinyl alcohol nanofiber is 625 to 3,920 nanometers; and the nanofibers are stacked into the nanofiber membrane randomly. The corn alcohol-soluble protein/polyvinyl alcohol nanofiber membrane is made through electrostatic spinning process, the preparation method is simple and effective, preparation equipment is simple, the stability is high, and indexes such as the diameters of the nanofibers and the porosity of a membrane material and the like can be regulated through changes of the condition of the electrostatic spinning process. The experiment proves that compared with a common PC (polycarbonate) plate, the corn alcohol-soluble protein nanofiber membrane material contributes to proliferation of mouse embryonic stem cells, and the diameter of the stem cell clone cultured for 5 days reaches 100 micrometers. Moreover, the nanofiber membrane can be recycled after being steamed and pressed for 30 minutes at 120 DEG C.

An organic luminescence includes pixel electrodes. Banks are each generally between adjacent ones of the pixel electrodes. The banks define apertures that each correspond to one of the pixel electrodes. An organic luminescent layer is within each of the apertures, and an upper electrode is above the banks and the organic luminescent layer. At least a portion of a periphery of each of the apertures includes curved portions and cusps. The curved portions are concave, and adjacent ones of the curved portions define each of the cusps.

The invention discloses a high-damping self-compaction concrete which is composed of P.O42.5 ordinary Portland cement, composite reinforcing powder, emulsified asphalt, polycarboxylic acid high efficiency water reducing agent, mixing water, composite deformation component, II-zone grade river sand with the fineness modulus of 2.6-3.0, and limestone gravel with the particle size of 5-20mm. Every cubic meter of concrete comprises the following components in parts by mass: 16 parts of cement, 7.8 parts of composite reinforcing powder, 0.8-1.0 part of emulsified asphalt, 7.5 parts of mixing water, 0.22-0.27 part of water reducer, 1.6-1.7 parts of composite deformation component, 29-30 parts of river sand and 36-37 parts of limestone gravel. The high-damping self-compaction concrete has the advantages of excellent damping function, excellent shock resistance, higher mechanical strength, low elastic modulus and obvious technical and economical effects, and especially can effectively improve the service behavior and service life of basic structures subjected to impact, vibration and other repeated mobile load actions, such as high-speed railway track structures, bridge structures and other engineering structures.

The invention relates to a liposome calcium sulfate composite nanometer artificial boneware, as well as a preparation method and application thereof. The preparation method comprises the steps of well mixing liposome (1 to 40 percent), calcium sulfate powder (40 to 80 percent) and diluent (10 to 50 percent), curing the materials and then preparing a bone graft substitute containing nanometer liposome. The liposome can carry medicine and can modify surface, has two forms, namely solution and powder, and comprises traditional micromolecule liposome and macromolecule liposome having macromolecule characteristics. The invention can provide an artificial bone material which has nanometer reinforcing effects, function of sustaining and controlling medicine release, controllable degradation time, good biocompatibility and mechanical strength, can induce bone growth in vivo, and is beneficial to the healing of defective areas of bones.

A compressor impeller including at least one blade connected to an impeller hub via a junction of curved shape, the blade extending along a defined chord between a leading edge and a trailing edge of the blade. The junction presents the shape of an ellipse that varies along the chord.

The invention discloses a high-performance structural adhesive for a reinforcement project with water environment and a preparation method of the high-performance structural adhesive. The structural adhesive is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is (2 to 1) to (3 to 1). The component A consists of nano silica grafted modifiedepoxide resin, epoxy active diluent, an elastomeric modifier, water-absorbent resin, a defoaming agent, a dispersing agent, active silica powder, cement, calcium sulfate whisker, organic montmorillonite and a thixotropic agent; the component B consists of a compound amine curing agent, a curing accelerator, a coupling agent, the defoaming agent, the dispersing agent, the active silica powder, thecement, the calcium sulfate whisker, the organic montmorillonite, the thixotropic agent and the carbon black. The high-performance structural adhesive for reinforcement projects with the water environment, disclosed by the invention, has the advantages of high bonding strength of water interface, high mechanical strength, good toughness, excellent impact resistance and high fatigue resistance, good construction performance and the like; the bonding effect and durability of the structural adhesive in the reinforcement projects with water environment can be remarkably enhanced; in addition, thepreparation method of the high-performance structural adhesive is especially suitable for meeting glue demands of a hydraulic structure reinforcement and restoration project.

There are provided a printing head substrate, an ink jet printing head and an ink jet printing apparatus, which accurately detect a temperature state in the central part of a heater array on the substrate and restrict an area of the substrate to a minimum. A printing head substrate has a plurality of heating elements, a plurality of ink supply openings, a logic circuit for driving the heating elements; a substrate temperature detecting element for detecting a temperature of the printing head substrate, and input and output pads for carrying out reception and supply of a signal between a printing apparatus, and the logic circuit and the substrate temperature detecting element, wherein a beam integral with the substrate is provided between the plurality of ink supply openings, and the substrate temperature detecting element is arranged on the beam.

A polymer electrolyte is formed by curing a composition prepared by mixing a polymer of compounds of polyethylene glycol di(meth)acrylates and/or multi-functional ethyleneoxides; one selected from a vinylacetate monomer, a (meth)acryalte monomer, and a mixture of a vinylacetate monomer and a (meth)acrylate monomer; and an electrolytic solution containing a lithium salt and an organic solvent.

The invention discloses a preparation method for high-strength artificial turf polyurethane gum. The preparation method comprises the steps that a hydroxyl-terminated polyurethane pre-polymer obtained through a synthetic reaction of difunctional polyether, trifunctional polyether, methylene diphenyl diisocyanate and a little amount of high-boiling-point solvent under a certain condition is utilized to be composited with polyether of different functions, a micromolecular chain extender, an inorganic filler, a wetting dispersant, an organic silicon coupling agent, color paste, a catalyst and the like to serve as a first component of the adhesive; polyisocyanate serves as a second component of the adhesive, and the two components are compounded in proportion to obtain the high-strength artificial turf polyurethane gum. The prepared high-strength artificial turf polyurethane gum has the advantages of being lower in viscosity, long in normal temperature potlife, high in heating and curing speed, good in bonding effect and the like and especially has the very high mechanical strength, the turf drawing force reaches 70 N or above, and the requirements of a high-end artificial turf, especially a sports turf, for the high-strength gum are completely met.

The invention provides a back membrane material of a solar cell module. The back membrane material is composed of an outer surface weather-proof layer, an intermediate layer and an inner surface encapsulation layer, wherein the outer surface weather-proof layer is a fluorine-containing film or a fluorine-containing coating, the intermediate layer is obtained through co-extrusion of a glass fiber modified polyester layer and a polyamide layer, and the inner surface encapsulation layer is an encapsulation rubber layer which is prepared with vinyl acetate-ethylene copolymers and the like serving as matrix resin. The back membrane material has the advantages that the intermediate layer of the high-performance back membrane is improved, the back membrane is used for encapsulating protection of a back side of the solar cell module, and compared with ordinary integrated back membrane films (ethylene vinyl acetate (EVA) + polyethylene terephthalate (PET) + fluorine films), the back membrane material is high in mechanical strength, good in moisture and gas resistance and good in weather-proof performance.

The invention provides a silicon nitride porous ceramic and a preparation method thereof. The silicon nitride porous ceramic is prepared by sintering reaction raw materials, wherein the reaction raw materials comprises 76-87 parts by weight of siliceous precursor, 5-8 parts of silicon nitride and 8-16 parts of additive, wherein the siliceous precursor is made by carbonizing rice hulls. The silicon nitride porous ceramic is made by adopting low-cost agricultural waste rice hulls as a raw material, a preparation technology of the silicon nitride porous ceramic product is simple, the sintering temperature is low, and the production cost is low.

The invention provides a hollow fiber ultrafilter membrane, which is obtained by a following mixture after film forming treatment: 14wt%-25wt% of film forming polymer, 0.1wt%-15wt% of meta aramid fiber, 6wt%-10wt of pore forming agent and 59wt%-80wt% of solvent. The invention also provides a preparation method of the hollow fiber ultrafilter membrane. The meta aramid fiber possesses high strength, and enables mutual interpenetration of different polymer chains, is capable of enhancing the mechanical strength of the film forming polymer, so that the hollow fiber ultrafilter membrane possesses high mechanical strength without wire facture, thereby the service life can be prolonged, the daily maintenance frequency can be minimized, and the water treatment cost can be reduced; The meta aramid fiber can increase the hydrophilic performance of the hollow fiber ultrafilter membrane, so that the contamination resistance is good, the flux is high and the attenuation speed is slow. The meta aramid fiber can enhance the heat resistance of the hollow fiber ultrafilter membrane and is more suitable for usage under rigorous condition.