30results about How to "Have physical properties" patented technology

The invention relates to a preparation method of a protein magnetic imprinting nano sphere, in particular to a preparation method of a protein magnetic imprinting nano sphere which takes one of hemoglobin, muramidase or serum protein as template molecules; the preparation method includes the following steps: synthesizing magnetic nano particles which are Fe3O4 nano particles covered with silicon dioxide on the surfaces; carrying out silanization to the amino-groups on the surface of the magnetic sphere; using glutaric dialdehyde to connect protein; using silylation agent to fix the space structure of template protein; alkaline eluting the protein on the surface of the magnetic sphere to form imprinting sites. The hemoglobin, muramidase or serum protein magnetic nano imprinting polymer sphere prepared by the invention combines the precise and specific identification property of molecular imprinting and the quick separation property of the magnetic nano sphere under the action of an external magnetic field, integrates the advantages of molecular imprinting and the magnetic nano sphere, avoids complex centrifugation operation, plays vital roles in the separation of cells, protein and nucleic acid, the detection of biomolecules, tumor diagnosis and medicine targeting therapy and has promising application prospect in the field of isolation analysis.

Provided is a photo-curable thermosetting composition which has suitable viscosity for application to inkjet printers, can render patterns directly on a PCB substrate, cures at comparatively low temperatures, and further has, after curing, excellent adhesion, chemical resistance, heat resistance, and insulating properties. This photo-curable thermosetting composition is characterized by containing (meth)acryloyl group-containing monomers, blocked isocyanate, and a photo-polymerization initiator and by being applicable to inkjet printing.

Solid laminated wood of a novel structure is composed of first square battens of a novel structure and second square battens of a novel structure. The two kinds of square battens are consistent in shape and structure, wherein a tenon is arranged on the middle portion of the top of each batten in the chordwise direction, side mortises are arranged on the two sides of the tenon on the top of each batten in the chordwise direction, a mortise groove is formed in the middle portion of the bottom of each batten in the chordwise direction, side tenons are arranged on the two sides of the mortise groove in the bottom of each batten in the chordwise direction, and the first square battens of the novel structure are twice as long as the second square battens of the novel structure. When the two kinds of square battens are combined into the laminated wood, the second square battens and the first square battens are spliced in a crossing mode in the shape of three stacked squares so that the tenons and the mortise grooves of the two kinds of battens can be combined and the side mortises and the side tenons of the two kinds of battens can be combined to form a tenon and mortise inlaid structure. In the splicing process, the two kinds of battens are adjusted to be arranged and spliced in the cross mode according to the required wood length so as to form a piece of laminated wood with any length and width; due to the fact that the battens are firmly sleeved with one another as a whole, the formed laminated wood is accordingly stable and firm, and a new type of laminated wood is added for artificial boards.

The invention belongs to the field of sensor signal simulation, and relates to a thermal resistor sensor signal simulation circuit. The passive thermal resistor sensor signal simulation circuit comprises a digital-to-analog conversion chip, a first operational amplifier, a second operational amplifier, a third operational amplifier, a gear-shifting switch, a plurality of capacitors and a plurality of resistors, wherein the gear-shifting switch is connected with the reference end of the digital-to-analog conversion chip through a voltage follower circuit, and the feedback end and the output end of the digital-to-analog conversion chip are sequentially connected with a filtering circuit and a proportion amplification circuit formed by the operational amplifiers in series. Resistor signals output by the passive thermal resistor sensor signal simulation circuit have the physical characteristics of a real resistor, are strong in band load capacity and are free of interference of subsequent circuits; in addition, digital signals can be linearly converted into thermal resistor signals in a given manner to be continuously output, the output precision is high, and the output range can be adjusted by the gear-shifting switch.

An integrated solid wood panel of an embedded structure is composed of first square strips and second square strips. The shape structures of the two types of square strips are consistent, wherein an arc-shaped tenon is arranged on the chordwise top of each wood strip, an arc-shaped mortise is arranged at the chordwise bottom of each wood strip, but the length of the first square strips must be inconsistent with the second square strips. When the integrated panel is formed by combining the two types of square strips, the second square strips and the first square strips are spliced in a staggered and intersected mode, the arc-shaped tenons and the arc-shaped mortises of the two types of wood strips are matched, the tenon-mortise embedded structure is formed, the two types of wood strips are adjusted to be arranged and spliced in the intersected mode according to the required panel length in the splicing process to form an integrated panel of any length and any width, the integrated panel is relatively stable and firm due to the fact that the whole wood strips are firmly sleeved with one another, and the novel integrated panel is added to artificial boards. The arc-shaped tenons and the arc-shaped mortises are simple in structure and easy to manufacture, the wood strips are quite conveniently spliced, and therefore the work efficiency in the integrated panel manufacturing process is quite high.

The invention discloses a super absorbent sheet composite material, and a preparation method and an application thereof. The sheet material comprises, by weight, 100 parts of polyvinyl alcohol, 25-60parts of a plasticizer, 0.5 to 2 parts of glucomannan, 0.3 to 1 part of carrageenan, 10 to 50 parts of super absorbent resin, 0.5 to 1 part of a dispersing agent, 0.5-1 part of a powder auxiliary dispersant and 0.5 to 1 part of a slipping agent. The preparation method comprises the following steps: respectively metering the raw materials, adding the metered raw materials into a bin of an internalmixer, starting the internal mixer, heating and blending until polyvinyl alcohol is completely plasticized, discharging, feeding into a single-screw extruder, extruding into sheets by using a die head, carrying out three-roller calendering molding, cooling and shaping, trimming, and rolling to obtain the super absorbent composite sheet finished product. The super absorbent sheet composite materialnot only has higher normal saline absorption rate, but also has excellent normal saline retention rate, and can be applied to the fields of hygiene care, agriculture, forestry, civil construction, petrochemical engineering and the like.

The invention discloses a novel die bonding film. The film is characterized by comprising nano metal powder, antioxidant, soldering flux, stabilizer and active agent, wherein the content of the nano metal powder is 40-95.0 wt.%, the content of the antioxidant is 1-50 wt.%, the content of the soldering flux is 1-50.0 wt.%, and the total amount of the soldering flux, the stabilizer and the active agent is smaller than or equal to 10.0 wt.%. The film is advantaged in that the nanometer metal powder, the antioxidant, the soldering flux and other materials are mixed and pressed to form a film, highheat dissipation can be achieved, thickness is uniform, flatness of a die bonding layer is well controlled, die bonding and interconnection under the low-temperature condition are achieved on the premise that electrical performance of a semiconductor packaging interconnection module is not affected, and use under the conditions of small spacing, high power, high temperature, high pressure and thelike can be met. The solid crystal film can be used in the fields of power electronic application, IGBT packaging, photoelectron packaging, MEMS packaging, microelectronics, high-power LED packagingand the like.

The invention discloses a preparation method for an aerogel carbon fiber compound filtering film. The preparation method comprises the following steps: dissolving aerogel into a solvent, adding a dispersing agent, adding 0.1mm carbon fiber into a solution and uniformly stirring; and adding an adhesive, uniformly stirring and then coating onto a base film, thereby acquiring the aerogel carbon fiber compound filtering film. The method is simple in process. The prepared aerogel filtering film has the characteristics of low density of aerogel, high specific surface area and high porosity, has the physical properties of the carbon fiber, has an excellent absorbing effect and is soft and difficult to break.

The invention discloses a low-smoke halogen-free flame-retardant polyolefin sheath material for a data cable. The low-smoke halogen-free flame-retardant polyolefin sheath material comprises the following raw material components in parts by weight: 40-80 parts of an ethylene-vinyl acetate copolymer; 3-10 parts of an ethylene-methyl methacrylate copolymer; 5-20 parts of an ethylene-octylene copolymer; 5-20 parts of modified polyethylene; 150-220 parts of an inorganic flame retardant; 3-10 parts of wollastonite; 3-10 parts of nano aluminum nitride; 10-20 parts of flame-retardant charring master batch; 1-3 parts of a silane coupling agent; 1-5 parts of a lubricant; 2-5 parts of color master batch; and 1-3 parts of an antioxidant. According to the present invention, the product has excellent heat resistance, during the high current resistance test, the fuming time from the energization to the beginning is long, the fuming amount is small, the foaming time is long, and more importantly, the foaming is small and less, even no foaming is generated, and the yellowing time and the cracking time are long. The material can well meet the requirement that a CAT6/6A type data cable of a UTP structure passes through bunching C type combustion, and other performance indexes also reach or exceed corresponding industrial standards.

The invention discloses an oil injector sealing gasket of an internal combustion engine. One to three ring-shaped bulges are formed on the lower surface of the oil injector sealing gasket; the lower surface of the oil injector sealing gasket is in contact with a gas cylinder cover; one to three ring-shaped grooves are formed in the plane of the gas cylinder cover, and mutually matched with the ring-shaped bulges on the oil injector sealing gasket; the upper surface of the oil injector sealing gasket is arch-shaped and in contact with an oil injector. The oil injector sealing gasket has the advantages of being simple in structure and convenient to machine; the sealing effect and the reliability are excellent; the oil injector has a positioning function, so that the assembly and work reliability can be guaranteed.

The invention discloses a multifunctional anionic polymer composite additive and a preparation technology thereof, and relates to the field of additives. The additive is prepared from the following raw materials in parts by weight: 1-100 parts of a 1,3-butadiene-styrene-divinyl benzene (B-sty/DVB) terpolymer and 0-50 parts of a nano anion additive. The multifunctional anionic polymer composite additive has the beneficial effects that (1) the polymer product contains a polybutadiene polymer block chain, so that the polymer product can form an interface phase together with partial organic interface; (2) the polymer product contains the polybutadiene polymer block chain, so that the chain length can be regulated by adding a monomer and an initiator; (3) a capsule formed by the product wraps partial anion additive in the product, so that the partial anion additive is not easily separated in the modification process; (4) the mixture wraps the anion additive, so that all characteristics of the anion are included; and (5) the mixture is polymer and inorganic nonmetal blend, so that the mixture has physical characteristics of the polymer and the inorganic nonmetal.

The invention discloses a high-water-absorption film composite material and a preparation method thereof. The film composite material comprises the following components in parts by weight: 100 parts of polyvinyl alcohol PVA, 10-20 parts of main plasticizer, 5-10 parts of auxiliary plasticizer, 5-30 parts of high-water-absorption resin, 0.5-2 parts of filling material, 0.3-1.0 part of slipping agent, and 0.5-1.0 part of dispersing agent. The components are uniformly dispersed at a high speed and then subjected to twin-screw extrusion granulation, and extrusion-blown molding film-forming is carried out to prepare the film composite material. The high-water-absorption film composite material prepared by the preparation method has a high normal saline absorption rate, and presents a high normal saline retaining rate. The high-water-absorption film composite material can be applied to the fields of hygiene care, agriculture, forestry, gardening, medicine and health, civil construction, petrochemical engineering, and the like.