69 results about "Chemical compatibility" patented technology

The invention relates to the field of underground environmental pollution prevention and control of refuse landfills, in particular to a comprehensive evaluation method for long-term antifouling performance of a clay separating wall of a refuse landfill, which comprises the following steps: S1, preparing clay separating wall materials with multiple proportions; s2, designing a test according to the long-term anti-fouling performance of the clay separation wall, and obtaining physical and chemical parameters of a clay separation wall material through the test; and S3, setting screening conditions according to the physicochemical parameters, and evaluating and screening the clay separation wall materials with multiple proportions by utilizing the screening conditions to obtain the clay separation wall material with long-term effective antifouling performance. According to the comprehensive evaluation method provided by the invention, the permeability of the clay separating wall, the chemical compatibility with the pollutants and the blocking time of the separating wall to the pollutants are comprehensively considered, so that the long-term antifouling property of the clay separating wall of the refuse landfill is more comprehensively judged, and the screened material can meet the long-term antifouling requirement; and the evaluation accuracy and reliability are greatly improved.

The invention discloses a risk assessment method and system for chemical leakage, and relates to the technical field of risk assessment. A risk assessment system for chemical leakage comprises a chemical three-dimensional construction module, a chemical leakage simulation module and a chemical leakage assessment module. According to the method, the chemical three-dimensional distribution model is constructed, so that the types, reserves and space structures of the chemicals in the region are comprehensively perceived, and the authenticity and space accuracy of leakage simulation are enhanced; a chemical compatibility matrix and a logic adjacency chain diagram are introduced, so that a potential chain reaction path is effectively identified, and the pre-judgment capability of a complex accident coupling risk is improved; a leakage space prototype is set based on a leakage point, and a surrounding building model is constructed, so that risk assessment has structured and local response capabilities, and the comprehensive influence of building purposes, function sensitivity and exposure conditions can be reflected.

The invention relates to the field of cooling liquid for new energy automobiles, in particular to long-acting anti-freezing cooling liquid with ultralow conductivity and a preparation method of the long-acting anti-freezing cooling liquid. The invention relates to a long-acting anti-freezing cooling liquid with ultralow conductivity. The long-acting anti-freezing cooling liquid comprises a copper corrosion inhibitor, an aluminum corrosion inhibitor, a pH value regulator, a defoaming agent, ethylene glycol, deionized water and a modifier, the modifier is prepared from coconut shells and nanometer aluminum oxide, and the modifier is obtained after the coconut shells are carbonized and loaded with the nanometer aluminum oxide. The cooling liquid disclosed by the invention has ultralow conductivity, so that the risk of battery fire caused by leakage is effectively reduced; the coating has good chemical compatibility and can be perfectly compatible with various materials in the cooling system of the electric automobile, so that corrosion and damage are reduced; and excellent heat conduction efficiency is achieved, efficient and stable operation of the cooling system can be guaranteed, and the service life of the electric automobile is prolonged.

The invention belongs to the technical field of road maintenance, and particularly discloses a pavement crack pouring material based on an ST-BA copolymer modifier and a preparation method. The pavement crack pouring material based on the ST-BA copolymer modifier is prepared from the following components in parts by weight: 80 to 100 parts of matrix asphalt, 4 to 6 parts of ST-BA copolymer, 5 to 9 parts of modified filler, 3 to 9 parts of compatilizer, 2 to 5 parts of tackifier, 0.1 to 0.15 part of stabilizer, 1 to 5 parts of anti-ultraviolet agent and 1 to 5 parts of adsorbent. The crack pouring material prepared by the invention not only has physical and chemical compatibility with aggregate between cracks, but also has stronger cohesiveness with the aggregate, has better displacement capacity at low temperature, can resist the influence of external environmental conditions on the performance of the crack pouring material, and prolongs the service life of the crack pouring material.

The invention discloses a preparation method of a layer-by-layer casting ultrathin asymmetric bipolar membrane, and belongs to the technical field of membrane separation. The invention aims to solve the problems that the total thickness of the traditional bipolar membrane is small, the water decomposition rate is low, and the conversion efficiency of different salts is obviously different. The asymmetric bipolar membrane is prepared by using a layer-by-layer casting method, and the thickness of the anion exchange layer and the cation exchange layer of the membrane is regulated, so that ion leakage is avoided, and the product purity is remarkably improved; the anion-cation exchange layer is prepared from a polymer with charge, and the adhesion capacity of the membrane is greatly improved by virtue of electrostatic attraction through the characteristic of opposite charge of the anion-cation exchange layer, so that the membrane is prevented from swelling in water. According to the invention, the anion and cation exchange membranes are adhered together through electrostatic adsorption force by virtue of the characteristic of opposite charges, the adhesion strength of the membrane is enhanced by virtue of the chemical compatibility of SPPSU and QPPO, the membrane has good mechanical property, and the service time and frequency of the membrane are improved.

The invention discloses an yttrium-doped gradient structure environmental barrier coating and a preparation method and application thereof, the yttrium-doped gradient structure environmental barrier coating comprises a substrate, a Si-HfO2-Y bonding layer, a Yb < 2-x > Y < x > Si2O7 intermediate layer, a y > Yb < 1.6 > Y < 0.4 > DS-(1-y) Yb < 1.6 > Y < 0.4 > MS transition layer and a Yb < 2-z > Y < z > MS environmental barrier layer which are sequentially arranged, x is 0 to 1.2, y is 0.55 to 0.85, and z is 0.2 to 1.0. In the multi-layer structure of the yttrium-doped gradient structure environmental barrier coating, a continuous yttrium-doped gradient structure is formed, so that the thermal expansion coefficient of each layer in the continuous yttrium-doped gradient structure environmental barrier coating is increased in a gradient manner, the layers have good chemical compatibility, and the continuous yttrium-doped gradient structure environmental barrier coating can stably serve for a long time in the temperature range of room temperature to 1450 DEG C.

The invention discloses a sealing material for a solid oxide fuel cell as well as a preparation method and application of the sealing material, and relates to the technical field of solid oxide fuel cells. The invention relates to a sealing material for a solid oxide fuel cell. The sealing material comprises mica and barium aluminum silicate-based glass, the barium aluminum silicate-based glass comprises the following components in percentage by mass: 10%-15% of BaO, 5%-10% of Al2O3, 15%-25% of B2O3, 6%-13% of CaO, less than or equal to 5% of La2O3 and the balance of SiO2. The sealing material obtained by adjusting the proportion of the components meets the requirements that the thermal expansion coefficient is larger than or equal to 8 * 10 <-6 > / DEG C and the softening point is low, thermal expansion coefficient matching and chemical stability are improved, chemical compatibility with other battery assemblies is good, long-term durability of sealing is ensured, production cost is reduced, and the sealing requirement of an SOFC stack is met.

The invention relates to the technical field of surface treatment, and discloses an aluminum alloy surface treatment method and an aluminum alloy material.The aluminum alloy surface treatment method comprises the steps that S1, an aluminum alloy matrix is subjected to deoiling, alkali washing and electric polishing, and a pretreated aluminum alloy matrix is obtained; and S2, a porous aluminum oxide layer is formed on the surface of the pretreated aluminum alloy base body through laser combined machining, a boss dot matrix is formed at an orifice of the porous aluminum oxide layer through reverse dissolution and heterogeneous particle deposition, a composite aluminum alloy base body is obtained, and laser combined machining is combined machining of laser etching and anodic oxidation. According to the aluminum alloy surface treatment method and the aluminum alloy material, the meshing effect of pore channels and bosses is formed, surface energy and acid-base Lewis sites are regulated and controlled through component and crystalline phase heterogeneous sites, interface chemical compatibility and heat and humidity resistance stability are improved, meanwhile, pore blocking caused by a continuous film is avoided, and therefore the specific surface area, interface energy and stability are improved, and the service life of the aluminum alloy material is prolonged. And the aluminum alloy surface with high bonding strength is formed.

The present application discloses a sealing material for solid oxide fuel cells, its preparation method, and application, and relates to the field of solid oxide fuel cell technology. A sealing material for solid oxide fuel cells comprises mica and barium aluminosilicate-based glass; the components of the barium aluminosilicate-based glass, calculated by mass percentage, include: BaO 10%-15%, Al2O3 5%-10%, B2O3 15%-25%, CaO 6%-13%, La2O3 ≤5%, and the balance SiO2. The sealing material obtained by adjusting the component ratio in the present application achieves a thermal expansion coefficient of ≥8×10 ‑6 / ℃ and low softening point requirements, improves thermal expansion coefficient matching and chemical stability, has good chemical compatibility with other battery components, ensures long-term durability of the seal, and reduces production costs, meeting the requirements of SOFC cell stack sealing.

The application discloses a kind of glass powder for electroplated silver paste, and chemical composition includes: SiO2 30~40%, TiO2 10~20%, B2O3 10~20%, SrO 5~10%, MgO 5~10%, ZnO 5~10%, BaO 1~10%, Na2O2~8%, Al2O3 1~5% by mass percentage.The silver paste glass powder has a suitable softening temperature, strong crystallization ability, excellent acid resistance, and has a matching thermal expansion coefficient and chemical compatibility with the ceramic substrate;The silver electrode made of the glass powder can complete the electroplating process well, and can achieve excellent adhesion strength between the silver electrode and the ceramic substrate, and is suitable for popularization and application.

The invention belongs to the technical field of fluid conveying pipelines, and particularly relates to a preparation method of an anti-permeation composite high-molecular perfluoropolymer braided hose, the anti-permeation composite high-molecular perfluoropolymer braided hose sequentially comprises a modified PTFE inner pipe and a stainless steel single-braided reinforcing layer from inside to outside, the modified PTFE inner pipe is prepared by mixing a PTFE raw material and a modification auxiliary agent and then performing preforming, sintering and extruding processes, and the stainless steel single-braided reinforcing layer is prepared from the modified PTFE inner pipe and the stainless steel single-braided reinforcing layer. The modification additive is a nano filler and a cross-linking agent, and the stainless steel single-woven reinforcement layer is formed by weaving stainless steel wires. The prepared composite hose has the characteristics of excellent corrosion resistance, high pressure resistance, high flexibility, long fatigue life and permeation resistance at the same time, can be used for occasions needing chemical compatibility and permeation resistance, ensures the pressure bearing capacity of the hose through the stainless steel single braid layer, protects the inner pipe from being abraded, and meets the fluid conveying requirements under extreme working conditions.

The invention relates to the technical field of polyethylene high polymer materials, and particularly discloses a high-strength polyethylene material for water supply engineering and a preparation method of the high-strength polyethylene material. The high-strength polyethylene material for the water supply engineering comprises the following components in parts by weight: 100 parts of high-density polyethylene, 20-30 parts of a modified ethylene-alpha olefin copolymer, 2-5 parts of an ethylene-glycidyl methacrylate copolymer, 1-2 parts of an antioxidant and 2-3 parts of a lubricant, the modified ethylene-alpha olefin copolymer is prepared by the following steps: carrying out melt blending extrusion on an ethylene-alpha olefin copolymer and a pore-foaming agent, putting a molded blend into deionized water, continuously soaking for 12-16 hours, taking out and drying. Through the synergistic effect of physical modification and chemical compatibility, the prepared polyethylene material has excellent toughness, strength and environmental stress cracking resistance, and is especially suitable for water supply pipes.

The present invention relates to the field of welding technology, and specifically discloses a combined connection method for base welding of dissimilar materials. The combined connection method, first, designs and prepares a group of welding materials, the welding materials match the respective connected parent materials, and the welding materials match each other; second, selects a suitable heat source and adopts a corresponding cladding method for cladding to prepare a composite weld cladding layer; third, designs and processes the groove; fourth, selects a suitable heat source and adopts a corresponding connection method for connection to prepare a composite weld connection layer. The combined connection method provided by the present invention has a variety of optional heat source types, efficient design and development of welding materials and connection processes, good welding flexibility, high efficiency, low cost, excellent base welding composite weld partitioning, can avoid the formation of brittle structure, heat input is precisely controllable, stress and deformation are small, weld formation is beautiful, and the comprehensive performance of the welding joint is good, which can realize base welding connection of dissimilar materials with large differences in physical properties and poor chemical compatibility.

The invention provides a glass fiber impregnating compound which comprises effective components and water, and the solid content of the impregnating compound is 6.0-8.0%. The effective components comprise a silane coupling agent, a film-forming agent, a lubricant, a wetting agent, an antioxidant, a heat-resistant stabilizer, an anti-sulfide additive and a pH value regulator; the impregnating compound has good chemical compatibility and permeability, yarns have good bundling property and low hairiness, and the impregnating compound is especially suitable for a pultrusion process. The glass fiber yarn produced by adopting the impregnating compound is suitable for the fields of preparation of sucker rods, offshore oil production platform equipment brackets, structural brackets in various chemical corrosion environments and the like.

The invention relates to a chemical compatibility analysis method and device, computer equipment and a storage medium. The method comprises the following steps: pre-constructing a reaction database, a storage database and a packaging database; obtaining a to-be-analyzed chemical; based on a reaction database, according to the first chemical and the second chemical, determining reaction compatibility between the first chemical and the second chemical; based on a storage database, determining storage compatibility between the first chemical and the second chemical according to the first chemical and the second chemical; based on a packaging database, determining a first packaging material and a second packaging material according to the first chemical and the second chemical; the first packaging material corresponds to the first chemical, and the second packaging material corresponds to the second chemical; and generating a chemical compatibility analysis report according to the reaction compatibility, the storage compatibility, the first packaging material and the second packaging material. By adopting the method, the compatibility of the chemicals can be efficiently and comprehensively analyzed.

The invention discloses a preparation method of a wear-resistant and stretch-resistant biaxial fiber fabric, belongs to the technical field of fiber fabric processing, and is used for solving the technical problem that the wear resistance and stretch resistance of the biaxial fiber fabric in the prior art need to be further improved. Then weaving, coating the surface, and finally curing and drying to obtain the wear-resistant stretch-resistant biaxial fiber fabric. The modified fiber disclosed by the invention is subjected to surface epoxy grafting modification, so that the wear resistance of the modified fiber is kept, the compatibility with other components is improved, and a wear-resistant basic framework is provided for a fabric; the modified coating agent forms a cross-linked network with the curing agent through the polyester polyol, a high-hardness wear-resistant coating is formed on the surface of the fabric in combination with the reinforcing effect of the modified filler, and the wear-resistant and tensile properties of the fabric are jointly improved through chemical compatibility and structural synergy of the polyester polyol and the curing agent.

The utility model belongs to the technical field of rings, in particular to a ring connecting structure, which comprises a base and a rabbet, a connecting rod penetrating through the base from outside to inside is arranged at the bottom of the rabbet, a connecting piece fixed with the penetrating part of the connecting rod is arranged on the inner side of the base, and the rabbet and the connecting piece are components made of the same material. The bottoms of the connecting rods are connected with the fixed base through welding with the connecting pieces, and the number of the connecting rods is at least two; the first connecting hole is matched with the connecting rod, an automatic positioning function can be achieved when the first connecting hole and the connecting rod are in butt joint, positioning is not needed during welding, only the first connecting hole and the connecting rod need to be kept in a pressed state, and welding difficulty is reduced; meanwhile, the rabbet and the connecting piece are made of the same material, so that the mechanical strength and chemical compatibility after welding are guaranteed, the overall strength is higher, and the appearance is attractive.

The invention relates to the technical field of coating, and discloses a high-adhesion plastic reflector and a preparation method thereof. The high-adhesion plastic reflecting mirror comprises a plastic substrate, and a TiAlN bonding layer, a Ti seed crystal layer and an Al reflecting layer which are sequentially deposited on the surface of the plastic substrate, c-N bonds, (C-O)-(Ti, Al, N) bonds and C-Ti and C-Al bonds are arranged between the TiAlN bonding layer and the plastic substrate, then, the chemical compatibility between TiAlN and the Ti seed crystal layer is high, Ti atoms can be slightly diffused into the TiAlN bonding layer, N atoms can also be slightly diffused into the Ti seed crystal layer, a thin and compact Ti-N reaction transition layer and a Ti-Ti metal bonding layer are formed, the adhesive force of the Ti layer can be greatly improved, and finally, the bonding strength of the Ti layer is improved. And the Al reflecting layer and the Ti seed crystal layer are tightly connected through a metal bond Ti-Al, so that strong adhesive force is obtained. According to the method, TiAlN, Ti and Al are sequentially deposited on the surface of the plastic substrate, the TiAlN located on the bottom layer can play a role of a bonding layer, and the TiAlN and the plastic surface can form a complex chemical bonding structure, so that the bonding force is improved.

The invention discloses a food containing high-purity alkaline compound vitamin C and a preparation process thereof, and belongs to the technical field of functional foods. The core is a microencapsulated particle prepared by using a liposome embedding technology, and the microencapsulated particle comprises alkaline vitamin C components such as sodium ascorbate and calcium ascorbate which are wrapped by a phospholipid bilayer; the shell layer is composed of foaming agents such as citric acid and sodium bicarbonate and flavor auxiliary materials. The process comprises the following steps: firstly, preparing lipidosome wrapped with vitamin C by adopting technologies such as high-pressure homogenization and the like, and then curing the lipidosome into microcapsule powder by adopting technologies such as spray drying and the like; performing wet granulation on the powder to obtain core particles; and finally, coating the shell powder on the surfaces of the inner core particles by adopting a powder coating process. Through dual protection of liposome embedding and core-shell physical isolation, the problem of chemical compatibility between an alkaline core and an acidic shell is fundamentally solved, the bioavailability of vitamin C is also improved, and meanwhile, the stability and excellent taste of the product are ensured.

The invention discloses an alumina fiber reinforced super-elastic zirconia-based ultra-high-temperature ceramic-based composite material and a preparation method thereof, and the preparation method comprises the following steps: mixing and grinding cerium oxide stabilized super-elastic zirconia and alpha-Al2O3 powder, carrying out compression molding, and sintering to obtain the alumina fiber reinforced super-elastic zirconia-based ultra-high-temperature ceramic-based composite material. The alumina fiber reinforced super-elastic zirconia-based composite material is innovatively provided, matrix crack propagation is inhibited through the fiber, phase change toughening of super-elastic zirconia is utilized to make up for insufficient high-temperature performance of the fiber, and the chemical compatibility advantage of the alumina fiber and the super-elastic zirconia is combined, so that a new thought is provided for a next-generation super-high-temperature thermal protection material.

The invention relates to the technical field of superconduction, in particular to a preparation method, device and equipment of a coating conductor of a substrate and a storage medium. The method comprises the following steps: S1, acquiring related parameters of a target film, wherein the related parameters of the target film comprise at least one of material chemical compatibility, material expansion coefficient and lattice constant of the target film; s2, screening a buffer layer material meeting the conditions of the material chemical compatibility, the material expansion coefficient and / or the lattice constant of the target film from a material library; s3, acquiring the preset growth temperature and thickness of the target film; s4, determining target growth temperature and thickness corresponding to the target buffer layer material; and S5, preparing the coating conductor according to the target growth temperature and thickness. According to the method, the most suitable buffer layer can be selected, and the superconducting performance can be improved when the superconducting thin film is prepared on the metal base band with poor texture quality.

The invention discloses a resin composition and application thereof. The resin composition comprises 50-180 parts of thermosetting resin, 10-50 parts of core-shell rubber or dispersion liquid thereof, 5-40 parts of polyolefin and 5-20 parts of thermoplastic polyimide resin. Wherein the thermoplastic polyimide resin has an average particle size of 1 to 10 [mu] m; the core-shell rubber has an average particle size of 0.1 to 10 [mu] m. The composition is endowed with the characteristics of low dielectric, high heat resistance and insulation through the thermosetting resin, the thermoplastic polyimide is introduced to improve the cohesive strength and modulus among the components and enhance the chemical compatibility and bonding strength with a CVL film, and the polyolefin and the core-shell rubber are matched to adjust the adhesive resistance and greatly improve the dielectric property and the bonding property, so that the adhesive property of the CVL film is greatly improved, and the service life of the CVL film is prolonged. The resin composition with excellent low dielectric, high heat resistance, low flowability and high cohesiveness is obtained, a prepreg with low dielectric, low gummosis and high cohesiveness is prepared, and the requirement for the field of rigid-flex printed circuit boards for high-speed signal transmission is met.

The invention belongs to the technical field of chip detection, and particularly relates to a TFT display screen drive IC chip detection device which comprises a device body and a chip body. An upper frame is fixedly installed at the top of the equipment body, an XYZ motion platform is fixedly arranged at the top of the upper frame, a dispensing machine is arranged on the XYZ motion platform, the bottom of the dispensing machine is in threaded connection with a glue guiding pipe used for glue discharging, and the two sets of conveying mechanisms are arranged and used for conveying chips on the front face and the back face respectively. The conveying mechanism comprises an objective table fixedly mounted at the top of the equipment body, a mounting frame is fixedly arranged at the top of the objective table, and a positioning module is arranged on the mounting frame. According to the invention, multiple functions of thermal conductivity detection, humidity sensitivity detection, chemical compatibility detection and the like are integrated, the performance of the chip can be comprehensively and accurately evaluated, a scientific basis is provided for improving the optimization of a chip manufacturing process, and the use is more convenient.

The invention discloses a submicron precision integrated filter material and a filter element with the same, the submicron precision integrated filter material is prepared by carrying out in-mold one-time pressure sintering molding on thermal bonding composite short fibers, and a three-dimensional labyrinth type net structure with high pore tortuosity is formed. According to the invention, the stable filtering precision of the fiber filter material is improved to a submicron level of 0.1-0.5 [mu] m from greater than or equal to 1 [mu] m in the traditional process, so that the intergenerational crossing of technical performance is realized; a unique short fiber random sintering structure is adopted, so that high filtration precision is realized, high porosity and relatively low pressure drop are maintained, and the tradeoff relation that precision and flux are difficult to obtain at the same time in a traditional filtration material is broken; according to the present invention, the traditional multi-process and intermittent production is changed into the one-shearing and one-burning two-step continuous or batch production, such that the expensive carding equipment, the expensive lapping equipment and the expensive other equipment are omitted, the production efficiency is high, the comprehensive cost is low, no chemical binder is introduced, the biological and chemical compatibility is good, and the method is suitable for various harsh scenes from terminal sterilization to high-purity chemical filtration.

The invention provides a microcrystalline glass powder composition for packaging a mica window GM counter as well as a preparation method and application of the microcrystalline glass powder composition. The microcrystalline glass powder composition for packaging the mica window GM counter is prepared from the following components in parts by weight: 70 to 90 parts of Bi2O3, 2 to 15 parts of ZnO, 1 to 12 parts of B2O3, 1 to 8 parts of BaO, 0.2 to 7 parts of Al2O3, 0.1 to 5 parts of CuO, 0.1 to 5 parts of K2O, 0.1 to 5 parts of Li2O, 0.1 to 5 parts of La2O3, 0.1 to 8 parts of CeO2 and 0 to 5 parts of an oxidizing agent. The oxidizing agent is nitrate and / or nitrite of the elements. According to the present invention, the specific components and the corresponding component contents of the microcrystalline glass powder composition are optimized, such that the microcrystalline glass powder composition has excellent thermal stability and excellent chemical compatibility so as to be used as the excellent packaging material for the mica window GM counter, and the air tightness of the mica window GM counter is improved.

The invention discloses an improved filtering device of a flow cell of a flow cell method dissolution instrument and a method for measuring the dissolution rate of an ibuprofen suspension. The filtering device is sequentially composed of a screen, a glass fiber membrane, a polycarbonate membrane and a screen. The polycarbonate film has outstanding impact toughness, transparency and dimensional stability, is high in pressure resistance and wide in chemical compatibility, and can be used for an extrusion process of lipidosome. According to the flow pool dissolution method, the polycarbonate film can prevent a flow path on the filter film cover from being blocked, most of the blocking problems are solved, the good pressure resistance of the polycarbonate film can assist drugs, especially drugs with multiple auxiliary materials and high viscosity, to be subjected to dissolution rate testing smoothly by adopting the flow pool dissolution rate method, and the applicability of the novel dissolution method of the flow pool dissolution method is improved.

The present application relates to an environmental barrier coating and a preparation method thereof, the coating comprises, from the substrate outward, a hafnium oxide modified silicon primer layer, which forms a high bonding strength with the substrate and improves the high-temperature oxidation and molten salt corrosion resistance by hafnium oxide modification; a lanthanum silicate transition layer, which realizes the gradient transition of the thermal expansion coefficient, relieves the thermal stress between the layers and optimizes the chemical compatibility of the primer layer and the surface layer; and a ytterbium silicate surface layer as the main thermal insulation layer, which is provided with a honeycomb-shaped pore microstructure on the surface and contains large pores with a pore size > 20 microns and micropores with a pore size < 5 microns. The structure promotes the rapid penetration and filling of the CMAS melt through the large pores to shorten the residence time and accelerate crystallization, and the micropores induce local supercooling through capillary action to form a dense barrier layer to block the penetration of the melt, and each layer is complementary in corrosion resistance, thermal shock resistance and CMAS protection, meeting the long-term stability requirements in extreme environments of 1200-1600 DEG C.

The invention belongs to the technical field of electric power engineering, and particularly relates to a composite layer material for a cable intermediate joint and a preparation method of the composite layer material. The composite layer material for the cable intermediate joint is composed of an inner semi-conductive layer, an insulating layer and an outer semi-conductive layer, the silicone rubber is prepared from the following raw materials: methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, trifluoropropyl methyl vinyl silicone rubber, a vulcanizing agent, an assistant crosslinker, an accelerant, diphenyl silanediol, an anti-aging agent, trifluoropropyl cage type silsesquioxane, and a mixture of modified nano hydroxyapatite and nano hectorite. According to the composite layer material for the cable intermediate joint, the three layers adopt the consistent siloxane main chain structure and vulcanization system, interlayer chemical compatibility is ensured, synchronous co-crosslinking is achieved, and by adjusting the silicone rubber composition and proportion of all the layers, the composite layer material can be applied to the cable intermediate joint. And it is ensured that the prepared composite layer material for the cable intermediate joint has excellent mechanical and hydrophobic water-blocking performance.

A roofing membrane includes a thermoplastic polyolefin (TPO) layer and a polyvinyl chloride (PVC) layer. The TPO layer forms a bottom layer of the roofing membrane, and the PVC layer is positioned atop the TPO layer so that the PVC layer forms a top layer of the roofing membrane. The TPO layer and the PVC layer are configured to be chemically compatible so that the TPO layer and the PVC layer are chemically bonded and function as a single roofing membrane. Compatibilizing includes at least one of (i) adding a compatibilizing agent to at least one of the TPO material and the PVC material prior to extrusion and (ii) positioning at least one compatibilizing film, prior to bonding, between the TPO material and the PVC material.

This application relates to the field of cell preservation, and discloses a long-term preservation medium for stem cells based on a three-dimensional biomimetic microenvironment, which comprises the following component materials in parts by mass: flexible skeleton, benzoyl peroxide, superoxide dismutase, retinoic acid, ferulic acid, mixed buffer, nucleic acid aptamer targeting stem cells, serum-free medium, bFGF and TGF-β. Its construction method comprises the following steps: S1, three-dimensional scaffold construction; S2, antioxidant loading; S3, buffer preparation; S4, aptamer modification; S5, medium integration. The three-dimensional scaffold structure constructed by natural polysaccharides and nanocomposites, combined with the biomimetic pore and flexible network design, effectively simulates the extracellular matrix microenvironment. At the same time, by improving the structural stability and chemical compatibility of the cell adhesion interface, the cell morphology maintenance and adhesion force maintenance during the freezing process are realized, so that the scaffold provides a dynamically adaptable stable environment for cells structurally.