32results about How to "Good spatial stability" patented technology

The invention discloses a thermosetting plastic. The thermosetting plastic is characterized by comprising the following components in parts by weight: 60-95 parts of thermosetting resin, 5-40 parts of low-shrink additive, 150-300 parts of an inorganic mineral filler, 2-4 parts of an initiator, 0.6-1 part of calcium hydroxide micro powder, 2-6 parts of zinc stearate micro powder and 30-60 parts of glass fiber. In comparison with a conventional thermosetting plastic, the thermosetting plastic can be solidified more rapidly, high strength can be maintained within a wide temperature range, and the flame-retardant effect is good.

The invention relates to a macromolecular anionic-nonionic emulsifier and a preparation method thereof. The emulsifier is prepared from 15-20% of a vinyl monomer, 5-8% of a hydroxyl reactive monomer, 8-10% of a nonionic reactive monomer, 18-22% of an organic acid reactive monomer, 4-5% of an initiator, 20-25% of a neutralizer and the balance of a solvent. According to the scheme, the hydroxyl reactive monomer can endow the emulsifier with high emulsifying capacity and good dispersity and wettability, a polymer with the characteristics of a nonionic emulsifier is prepared by jointly using the hydroxyl reactive monomer and the nonionic monomer, and a small particle size can be obtained when the polymer is used for preparing an emulsion; the macromolecular polymer prepared by the method has the characteristics of both nonionic and anionic emulsifiers, has larger molecular weight, improves the water resistance of a paint film, and has the characteristics of fine particle size and high emulsibility; and the emulsifier is relatively high in stability, does not flocculate, is high in emulsion tolerance and has an extremely good emulsifying effect.

The invention discloses a preparation method of polyethylene hollow fiber membrane with the aperture in gradient distribution, comprising the following steps: (1) adding material compositions, and fusing at the temperature from 160 DEG C to 250 DEG C to form homogeneous phase solution, wherein the material compositions comprise polyethylene and diluent which have thermal liquid-liquid separation points; (2) adopting a spinning machine to squeeze the homogeneous phase solution and spin to obtain hollow yarns, and cooling, solidifying and forming by gradients; (3) removing the diluent by an extraction process; and (4) carrying out tensioning thermoforming to the hollow yarns obtained in the step (3) to obtain the polyethylene hollow fiber membrane with the aperture in gradient distribution.The prepared polyethylene hollow fiber membrane has the characteristics of small surface aperture, large internal aperture, high porosity factor and high flux.

The present invention relates to a SiO 2 - Potassium silicate atomic oxygen protective coating and preparation method, the coating includes silicon-acrylic emulsion and slurry, the weight ratio is 0.4-0.9:1, and the slurry is calculated by weight percentage, including: potassium silicate 10-25; diethanolamine 0.2 ~0.4; sodium hexametaphosphate 0.1~0.3; dispersant 0.2~0.6; defoamer 0.1~0.4; light calcium carbonate 2~8; heavy calcium carbonate 5~12; talcum powder 2~10; mica 2~10 ; Silicon oxide 20-50; Zinc oxide 4-7; Water is the balance. Its preparation is as follows: firstly weigh potassium silicate and dissolve it in water, then add stabilizer diethanolamine and stir evenly, adjust the pH value in the range of 11 to 13 to obtain acid-modified water glass base material; then add sodium hexametaphosphate The aqueous solution obtained after dissolving is put into defoamer and dispersant; secondly, fillers such as light calcium carbonate, heavy calcium carbonate, talcum powder, mica, silicon oxide and zinc oxide are added to disperse and grind to make a slurry; finally, silicon Add the acrylic emulsion to the slurry and stir evenly. The invention is suitable for anti-atomic oxygen erosion, anti-static and anti-radiation of near-earth orbiting aircraft.

The invention discloses a polymer microsphere adjusting and driving agent, which comprises the following raw materials in parts by weight: 21-25 parts of acrylamide, 5-8 parts of anionic surfactant, 0.5-1.2 parts of crosslinking agent, and 5-8 parts of emulsifier 1.5-2 parts of ammonium persulfate, 0.1-0.5 parts of potassium persulfate, 150-250 parts of oil and 100-280 parts of deionized water; stir the oil and emulsifier evenly to form a continuous oil phase; mix acrylamide, anion surface Active agent, crosslinking agent, and part of ammonium persulfate are dissolved in deionized water to form a water phase; potassium persulfate solution and ammonium persulfate solution are prepared; the water phase is added to the oil phase, ammonium persulfate solution is added at low temperature, and persulfate solution is added at high temperature Potassium solution, constant temperature reaction and natural cooling to room temperature. The invention provides a polymer microsphere control and displacement agent, through the combined reaction of the above-mentioned several materials, it is possible to synthesize polymer gel microspheres with good gel ductility matching its pore throat size, which greatly improves oil recovery .

The invention discloses a method for synthesizing a flocculating agent with the high solid content and high molecular weight based on inversion emulsion.The method comprises the steps that a compound emulsifier composed of a Gemini-type emulsifier and a traditional surface active agent is dissolved into an oil phase, a water phase containing an alkene flocculating agent monomer is slowly added into the oil phase, stirring and emulsification are performed to obtain a pre-emulsion, a bifunctional initiating system is added into the pre-emulsion to initiate a polymerization reaction, and emulsion is obtained after the polymerization reaction is completed.The obtained flocculating agent emulsion is high in solid content, large in intrinsic viscosity, good in stability and capable of being widely applied to red mud separation in aluminum oxide production.

The invention discloses a manufacturing method of a multilayered printed circuit board. The method comprises the following steps: setting calibrating points in equivalent positions of a multilayered soft substrate, carrying out multilayered positioning before drilling according to the calibrating points, and drilling the soft substrate to form via holes according to five-pointed star distribution;exposing a pattern on an original image to a light-sensitive bottom plate for development, etching the surface of a single sided board and setting a signal line unit; arranging multi-port connectingends at two ends, separately, bending a circuit board at a thermoplastic temperature and cooling and setting the circuit board quickly; arranging connecting pins in positions, corresponding to the viaholes, of the printed circuit board, electrically connecting the circuit board to the connecting pins through enamelled wires in corresponding via holes, and connecting the signal line units in different layers through via holes too. The multilayered printed circuit board is very good in spatial stability and convenient to form a three-dimensional multilayered circuit board structure, is directlywrinkled, rotated and set, can adopt batch production with same templates for many times, and the process is simplified, and the production efficiency is improved.

The invention discloses an osteoinductive collagen based composite hydrogel and a preparation method thereof. The preparation method comprises following steps: preparing a leather collagen solution byadopting an acidic buffer solution, fully stirring to promote the dissolution and dispersion, slowly adjusting the pH of the solution to 6.0-8.0 by using an alkali solution, then placing the solutionin a thermostat incubator, carrying out incubation to obtain a leather collagen hydrogel basic material; soaking the leather collagen hydrogel basic material in a chemical modifying agent solution, adding dopamine and an oxidizing agent, fully carrying out reactions to obtain a dopamine modified leather collagen hydrogel basic material; adding nano fish bones, adjusting the temperature and pH, after reactions, fully washing the reaction product by ultrapure water, and then sterilizing the reaction product by irradiation to obtain the osteoinductive collagen based composite hydrogel. The hydrogel has the advantage that the compatibility of interface between granular bones in the prepared hydrogel and organic phase hydrogel is greatly improved, thus the prepared hydrogel has an excellent osteoinductive property, and the additional value of leather collagen and fish bones is increased.

The invention discloses a preparation method of a POSS modified CdTe quantum dot sensitized solar cell. The method is to prepare CdTe quantum dot powder by condensing and refluxing in an aqueous phase method; then modify the surface of the CdTe quantum dot with POSS, and use the POSS-modified CdTe quantum dot as a photosensitizer to assemble a quantum dot-sensitized solar cell. This method is a simple and feasible preparation method for OA-POSS modified CdTe quantum dot sensitized solar cells, which solves the problems of poor stability of quantum dots and severe electron-hole recombination between the photoanode and the quantum dot interface. Modifying OA‑POSS on the surface of CdTe quantum dots can change the photoelectric characteristics of CdTe quantum dots, effectively passivate quantum dots, reduce the defects on the surface of quantum dots, increase the stability of quantum dots, and make electrons more effectively injected into TiO2, and then Improving the photoelectric conversion efficiency and stability of quantum dot-sensitized solar cells.

The invention discloses a method for manufacturing a flexible printed circuit board and provides a manufacturing method. The method comprises the following steps: drilling holes in a soft substrate according to pentagonal star distribution to form a plurality of via holes, exposing a pattern on an original image to a photosensitive base plate, executing development, etching the surface of a singlepanel, arranging a signal line group, respectively arranging multi-port connecting ends at two ends, bending the circuit board at a thermoplastic temperature, executing rapid cooling and shaping, andpressing a connecting surface; the space stability is very good, a three-dimensional multilayer circuit board structure can be conveniently formed, folding, rotation and shaping are directly carriedout, batch production can be achieved by using the same template for many times, the process is simplified, and the production efficiency is improved.

The invention discloses a core material for a vacuum heat-insulating board and a preparation method thereof. The core material comprises the following raw material components: acrylic acid, calcium oxide, polyvinyl alcohol, methacryloylpropyltrimethyl ammonium chloride, stearic acid, potassium bisulfite, glass fiber, silicon dioxide, polyester fiber, 1,4-cyclohexane diisocyanate, polyethylene adipate glycol, a silane coupling agent, pentamethyldiethylene triamine, bentonite, a chain extender and Tween 20. The preparation method comprises the following steps: successively subjecting acrylic acid, calcium oxide, polyvinyl alcohol, methacryloylpropyltrimethyl ammonium chloride, stearic acid and potassium bisulfite to reacting so as to obtain a reactant; then carrying out shearing granulation, and carrying out drying so as to obtain a material 1; and subjecting glass fiber, silicon dioxide, polyester fiber, 1,4-cyclohexane diisocyanate, polyethylene adipate glycol, the material 1 and the remained components to a certain reaction so as to obtain the core material for the vacuum heat-insulating board. The core material obtained by using the method provided by the invention has good heat-insulating performance and vacuum compression use stability.

A network frame lining structure for tunnels, including a network frame, the network frame is composed of inner chords, outer chords and webs, the outer chords and inner chords form two mesh surfaces, and the two mesh surfaces are separated by The web is connected; the outer chord is in contact with the surrounding rock. There are pressing bars on both sides of the net frame. The compression rod is filled with expansive concrete. A method for installing a network frame lining structure for a tunnel, comprising the following steps: 1) Excavating the tunnel according to actual construction requirements. 2) Initially spray a 30mm concrete layer on the surrounding rock wall of the tunnel after excavation. 3) Install the network frame, and fill the expansive concrete on the compression bars on both sides of the network frame. 4) The second anchor bolt passes through the grid frame foot and the steel plate to fix the grid frame on the ground, and fixes the right-angle steel plate at the corner of the frame foot and the steel plate through the first anchor bolt. 5) Spray concrete again on the grid frame after installation to complete the second lining. By adopting the above-mentioned structure, the safety and stability of the supporting structure in the tunnel are improved, and the construction cost is saved at the same time.

The invention belongs to the technical field of flexible pendulum accelerometers, in particular to a silicon-based coil-based permanent magnetic torquer for inertial navigation accelerometers. The permanent magnetic torque device for accelerometer of the present invention comprises a yoke, a permanent magnet, a magnetically conductive sheet and a silicon-based coil, wherein the yoke is located at the bottom, the permanent magnet is fixed on the yoke, and the magnetically conductive sheet is fixed on the upper surface of the permanent magnet . A permanent magnetic air gap is formed between the yoke and the magnetic permeable sheet, and the silicon-based coil is located inside the permanent magnetic air gap. When the permanent magnetic torque device is working, the silicon-based coil is fixed on the accelerometer pendulum through the coil spacer. The invention adopts the silicon-based coil to replace the enameled wire winding coil of the accelerometer permanent magnet torquer, effectively reduces the thermal stress between the accelerometer pendulum plate and the permanent magnet torquer coil, and simultaneously reduces the viscoelasticity of the coil. The silicon-based coil has better spatial stability in the permanent magnetic circuit, which can significantly improve the stability of the scale factor of the accelerometer.

The invention relates to a three-column steel pipe tower applied to a power transmission line. The three-column steel pipe tower comprises three main pipes which are vertically arranged and distributed in a shape of a triangle, and a plurality of layers of horizontal triangular spacers formed by three horizontal pipes and used for connecting the three main pipes. Two main pipes are arranged on the pressure side of the three-column steel pipe tower, and the rest one is arranged on the tension side of the three-column steel pipe tower. The pipe diameter of the main pipe arranged on the tension side of the three-column steel pipe tower is greater than the pipe diameters of the main pipes arranged on the pressure side of the three-column steel pipe tower. The three-column steel pipe tower is simple in structure, elegant in appearance, small in occupied area and specific in power transmission, and is suitable for power transmission engineering in city districts. Compared with a traditional single-pipe tower, the three-column steel pipe tower is larger in overall rigidity, can effectively reduce the displacement of a tower top, and can also lower the construction capacity of an iron tower and the foundation, so as to obtain the purpose of saving resources. The main pipes of the three-column steel pipe tower are more reasonable in pressure bearing, and better in the stability of triangular space.

The invention belongs to the field of optical fiber sensing technology and discloses an in-fiber detection system for biological molecules based on a pohotonic crystal fiber. The system comprises a light source unit, a sensing unit, a fluid filling unit, an optical detection unit, an optical fiber link and a filling link, wherein light output by a broadband optical source is transmitted to a conical optical fiber through an input optical fiber and an optical fiber circulator. Because the pohotonic crystal fiber is vertically contacted with a conical area of the conical optical fiber, light in the conical area is coupled to enter the pohotonic crystal fiber in a near field coupling manner; light meeting phase matching conditions is limited in the pohotonic crystal fiber to be transmitted; the wavelength corresponding to the light meeting the phase matching conditions is called a resonant wavelength; and light which does not meet the phase matching conditions is re-coupled to enter the conical optical fiber, is reflected into the optical fiber circulator, and then is transmitted to a spectrum analyzer through the output optical fiber so as to serve as a measuring signal. The detection system disclosed by the invention is simple in structure, flexible in design, easy to realize, small in size and high in sensitivity and precision and is capable of performing in-fiber detection on the biological molecules.

The invention discloses a preparation method of a waveguide bright anodic oxidation thermal control coating. The preparation method comprises: chemically polishing the surface of a target waveguide; covering and protecting a predetermined area of ​​the target waveguide; The target waveguide is subjected to sulfuric acid anodic oxidation; the anodized target waveguide is placed in an alkaline solution for neutralization; and deionized water at a predetermined temperature is used to seal the target waveguide. The invention adopts multiple protective measures combining deionized water perfusion in the inner cavity, sealing the bell mouth with a silica gel plug, and coating with peelable paint, so as to improve the performance of the waveguide. The thermal control coating prepared by the present invention has good quality consistency, has little influence on the waveguide performance index, and has a product pass rate as high as 98% or more; in addition, the thermal control coating prepared by the present invention has good spatial stability and can be used in the entire life cycle of a spacecraft. Medium solar absorption ratio α s and the hemispherical emissivity ε H The change values ​​are not greater than 0.02.

The invention relates to a polyacrylamide-based microsphere deep control and displacement agent and a preparation method thereof, which mainly solves the problem that the use of polymer microspheres in the prior art for medium and high permeability oil reservoirs has poor profile control, plugging and oil displacement effects and cannot be achieved. Deep profile control, increasing the use concentration of polymer microspheres and increasing the cost problem, by using polyacrylamide microsphere deep control and driving agent, in parts by weight, including the following components: 0.05 to 0.5 parts of polymer Microsphere emulsion, 0.1-1 part of surfactant for oil displacement, 0-99.85 parts of water; wherein, the polymer microsphere has a core-shell structure, and the core is a cross-linked polymer gel containing ionic monomer structural units. Glue microspheres, the shell is a technical solution of cross-linked polymer gel containing ionic monomer structural units with different or the same electrical properties as the ionic monomer structural units in the core, which solves this problem well and can be used for medium and high Field application of enhanced oil recovery such as deep profile control, water shutoff, and oil displacement in seepage reservoirs.