9results about How to "Improve cell structure" patented technology

The invention relates to the technical field of silicon rubber, in particular to a high-temperature-resistant and impact-resistant silicon foam material as well as a preparation method and application thereof. Comprising the following raw materials in parts by weight: 20-30 parts of vinyl silicone oil, 5-10 parts of hydrogen-containing silicone oil, 40-50 parts of a foaming agent, 5-10 parts of a reinforcing filler, 10-12 parts of a flame-retardant filler, 15-20 parts of a ceramic composite filler, 0.05-0.2 part of an inhibitor and 0.5-2 parts of a catalyst, wherein the ceramic composite filler is selected from a combination of modified glass powder, other ceramic forming fillers and zinc borate; the modified glass powder is low-temperature domain glass powder; and the other ceramic forming fillers are in multi-stage particle size grading. By matching the ceramic forming filler with a multistage particle size structure, plane accumulation with maximum ceramic forming points is formed on a silicon foam organic layer, and low-temperature domain fluxing agents with different melting point temperatures are selected to participate in generation of a continuous phase, so that the phenomenon of cracks caused by loss of skeleton particles due to massive decomposition of the organic phase is reduced, and the silicon foam material subjected to high-temperature calcination is complete in foam structure and high in strength. High-temperature resistance, heat insulation and impact resistance are high.

This invention belongs to the field of heavy metal removal technology, specifically disclosing an extract from the leaves of a Solanaceae plant, its extraction method, and its application. The extraction method includes the following steps: S1, mixing tomato and pepper leaves, chopping them to obtain a preliminary mixture; S2, mixing a compound microbial agent with the preliminary mixture obtained in S1, fermenting, sterilizing, centrifuging, filtering through a 0.45μm filter membrane, discarding the precipitate, and obtaining a fermented preliminary mixture; S3, concentrating the fermented preliminary mixture obtained in S2 under reduced pressure to obtain a concentrated fermentation broth; S4, adding sodium carboxymethyl cellulose to the concentrated fermentation broth obtained in S3, stirring evenly, and freeze-drying to obtain the Solanaceae plant leaf extract. This Solanaceae plant leaf extract can effectively remove cadmium from aquatic products, aiding in the growth recovery of aquatic products after cadmium stress, and can also effectively maintain the pH value of white clam muscle, reducing lactic acid accumulation and glycogen consumption, and maintaining the freshness of the meat.

The invention provides a composite insulating layer of a light superconducting cable and a preparation method and application of the composite insulating layer. The composite insulating layer is prepared from the following raw materials in parts by weight: 40-60 parts of fusible polytetrafluoroethylene, 30-50 parts of fluorinated ethylene propylene, 0.5-5 parts of an auxiliary agent, 1-5 parts of filler and 0.1-0.6 part of a nucleating agent. The composite insulating layer of the light superconducting cable has relatively high tensile strength, relatively low dielectric constant and dielectric loss factor, good mechanical property and high insulating strength; compared with the prior art, the composite insulation layer has the advantages of low average cell diameter and high cell density, which indicates that a uniform and fine cell structure is formed in the composite insulation layer, the overall density of the material can be effectively reduced, the insulation layer is light, and the composite insulation layer can be applied to preparation of light superconducting cables for medical equipment and realizes integrity and low loss of high-frequency signal transmission.

The invention relates to the technical field of macromolecular polyurethane foaming materials, and mainly relates to a preparation method of environment-friendly combined polyether for a polyurethane foaming material, the environment-friendly combined polyether comprises the following components in parts by weight: 10-18 parts of starch-based low polyether and the balance of polyether polyol, and the total weight is 100 parts. The preparation method of the environment-friendly combined polyether comprises the following steps: drying treatment, pretreatment, catalyst addition, initiator polyol addition, esterification reaction, grafting reaction, viscosity adjustment and mixing. The starch-based low-polyether is prepared by taking common and cheap corn starch as a main component, and the starch-based low-polyether is mixed with polyether polyol to form the environment-friendly combined polyether for the polyurethane foaming material, so that the aims of taking the starch-derived polyether as a raw material and improving the environment friendliness of the polyurethane foaming material are fulfilled, and the production cost is low.

The invention discloses a flame retardant PP / SEBS foam composite material and a preparation method thereof, and relates to the technical field of foam materials. The foam composite material of the invention comprises the following raw materials in parts by weight: 100 parts of polymer material, 3-5 parts of foaming agent AC, 1-3 parts of modified or unmodified nano silicon dioxide, and 20-25 parts of flame retardant; the polymer material is composed of PP and SEBS, wherein PP accounts for 80-95% of the total mass of the polymer material, and SEBS accounts for 5-20% of the total mass of the polymer material; the flame retardant is composed of ammonium polyphosphate and triazine carbon forming agent CFA in a mass ratio of 2-3:1. The PP / SEBS foam composite material of the invention has excellent flame retardant properties, mechanical properties and foaming properties, and has broad application prospects.

The invention discloses a supercritical foaming thermoplastic polyurethane sheet and an extrusion preparation device thereof, and relates to the technical field of polyurethane sheets, the polyurethane sheet adopts a layered structure of three layers of composite materials from top to bottom, and the three layers of composite materials comprise a compact surface layer, a light core layer and a reinforced bottom layer; high-speed shearing and pulse type directional pushing and dynamic mixing of raw materials are achieved through the bionic premixing assembly and the pretreatment assembly, axial pulsation is generated through the electromagnetic-driven extruder structure, supercritical fluid uniform nucleation and foam hole growth are promoted, the foam hole structure and mechanical performance of the foaming sheet are optimized, and the foaming performance of the foaming sheet is improved. Three-layer independent feeding and co-extrusion forming are achieved, the gradient foaming polyurethane sheet with the wear-resistant surface layer, the buffering core layer and the rebound bottom layer is prepared, and the comprehensive performance is excellent.

The present invention relates to the field of silicone rubber technology, and specifically to a highly flame-retardant ceramic silicone foam material and its application. The highly flame-retardant ceramic silicone foam material is mainly made of the following raw materials in parts by weight: 50 parts of base rubber, 20 to 40 parts of vinyl silicone oil, 1 to 8 parts of hydrogen-containing silicone oil, 5 to 20 parts of reinforcing filler, 20 to 40 parts of flame-retardant filler, 0.5 to 3 parts of foaming agent, 60 to 100 parts of composite ceramic powder, 0.02 to 0.1 parts of inhibitor, and 0.1 to 1 parts of catalyst. The highly flame-retardant ceramic silicone foam material prepared by the present invention can control the thickness within 0.5 to 3 mm, the vertical burning grade can still reach UL94 V‑0 level, and the density can be controlled at 0.15 to 0.5 g / cm 3 , a good porcelain-forming effect can be achieved under the condition of 700℃ in the muffle furnace. The material can still maintain a good self-supporting structure, no cracks, small bending deformation, and good integrity of the pore structure after being calcined at a high temperature of 900-1000℃ for 1-2 hours.

The invention discloses flame-retardant polypropylene foamed plastic and a preparation method thereof, and relates to the technical field of thermal insulation materials. The preparation method of the flame-retardant polypropylene foamed plastic comprises the following steps: adding polypropylene and a functional additive into a charging barrel of an extruder according to the raw material ratio, and carrying out melt blending, extrusion and granulation to obtain microparticles; the microparticles, deionized water and a dispersing agent are added into a high-pressure reaction kettle, a physical foaming agent is introduced, heat preservation and pressure maintaining treatment is conducted, pressure relief, cooling and drying are conducted, and foamed beads are obtained; the foamed beads are subjected to water vapor molding and annealing shaping, and the flame-retardant polypropylene foamed plastic is obtained. The polypropylene foamed plastic prepared by the invention has the characteristics of flame retardance and excellent mechanical properties.

The invention relates to the technical field of medical treatment, and particularly discloses a red breaking liquid for bloody body fluid cell wax blocks. The red breaking liquid is prepared from absolute ethyl alcohol and distilled water, and the volume concentration of the absolute ethyl alcohol is 20%-30%; according to the method, the ethanol aqueous solution in a specific concentration range is adopted as a splitting system, efficient and selective splitting of the red blood cells in the bloody body fluid is realized, and cell membranes of the seedless red blood cells can be quickly destroyed by utilizing the dissolution effect of ethanol on cell membrane lipid and the hypotonic characteristic of the solution, so that contents of the seedless red blood cells are released and are easily eluted. Meanwhile, the morphological integrity and cell membrane antigenicity of nucleated cells (including tumor cells) can be protected to the greatest extent, and the problem of cell damage or antigen shielding possibly caused by a conventional hemolytic agent is avoided.