38results about How to "Low temperature resistance" patented technology

The invention relates to a light high-strength heat-resistant high-entropy alloy and a preparation method thereof. Specifically, the light high-strength heat-resistant high-entropy alloy comprises the following components in atomic percent: 2 to 10 percent of Cr, 5 to 15 percent of Al, 10 to 20 percent of V, 5 to 20 percent of Nb, 40 to 60 percent of Ti, 2 to 10 percent of Zr and 0.2 to 2.2 percent of Si. The high-entropy alloy has the excellent performance of low density, high strength and high temperature resistance at the same time.

The invention provides a natural amphiphilic lignin nanoparticle emulsifier for an oil-based drilling fluid as well as a preparation method and application of the natural amphiphilic lignin nanoparticle emulsifier, and belongs to the technical field of oilfield chemical drilling fluids. The preparation method of the emulsifier comprises the following steps: fully dissolving alkali lignin in an organic solvent; filtering, dropwise adding filtrate into deionized water, fully dispersing, and dialyzing; and then carrying out ultrasonic treatment, centrifuging, washing and drying. The emulsifier takes the biomass-based polymer industrial alkali lignin as a raw material, and is green, non-toxic, cheap and easy to obtain; the preparation method is simple, short in period and free of harmful by-products, the organic solvent can be recycled, and the cost is low. The lignin nanoparticles are added into the oil-based drilling fluid as an emulsifier, so that the stability of the oil-based drilling fluid under a high-temperature condition can be remarkably improved; a compact interfacial film can be formed at an oil-water interface, and a three-dimensional network structure with viscoelasticity can be formed in a continuous phase, so that the stability of a water-in-oil emulsion is improved.

The present invention discloses a surface-reinforced aerogel composite material and a preparation method thereof. The prepared aerogel has the characteristics of light weight, high temperature resistance, low thermal conductivity, high strength, simple structure, etc., can withstand high temperatures, resist high-speed airflow scouring and exert excellent thermal insulation performance, and can be used as a thermal protection material in the aerospace field and other related fields. It can solve the problem that the structural strength of aerogel composite materials in the prior art is usually 2 to 3 orders of magnitude different from that of corresponding dense materials, and they cannot withstand high-speed airflow scouring on the surface of the fuselage of high-speed aircraft, and therefore cannot be used as heat-proof materials.

The invention relates to the field of adhesives, and particularly discloses high-weather-resistance antibacterial environment-friendly water-based woodworking glue and a preparation method thereof. Comprising the following components in parts by weight: 50-70 parts of water-soluble antibacterial polyurethane modified acrylic resin; 0.3 to 0.6 part of a defoaming agent; 0.5 to 0.8 part of a dispersant; 0.2 to 0.5 part of a thickening agent; 5-8 parts of a cross-linking agent; 5-10 parts of a solvent; and 3-8 parts of microcapsules. The woodworking adhesive disclosed by the invention is environment-friendly, high in adhesive power, capable of realizing lasting antibacterial and weather-proof effects and suitable for bonding outdoor wood products.

The invention discloses a microemulsion containing 15% of fine glufosinate-ammonium, quizalofop-p-ethyl and fluoroglycofen-ethyl and a preparation process thereof, and the microemulsion is prepared from the following raw materials in parts by mass: 90-110 parts of fine glufosinate-ammonium, 25-35 parts of fluoroglycofen-ethyl, 10-30 parts of quizalofop-p-ethyl, 15-20 parts of an organic solvent, 0.3-0.5 part of a defoaming agent, 3-5 parts of an ampholytic surfactant, 30-40 parts of a dispersing agent, 3-5 parts of an emulsifying agent and 20-40 parts of deionized water. The mass ratio of the fine glufosinate-ammonium to the fluoroglycofen-ethyl to the quizalofop-p-ethyl is 10: 3: 2; the microemulsion of the fine glufosinate-ammonium, fluoroglycofen-ethyl and quizalofop-p-ethyl prepared by the invention has the advantages of low temperature resistance, quick effect, small dosage, good environmental compatibility and the like, and also has the advantages of very good low-temperature stability, capability of keeping a true solution state for a long time, no layering and the like.

The invention belongs to the technical field of material preparation, and particularly relates to a superstructure glassy carbon material and application thereof. The invention firstly provides a porous scaffold structure. The porous scaffold structure has a stable structure in which stress in all directions is uniformly distributed; the porous scaffold structure takes a unit cell of a three-period minimum curved surface as a minimum repetitive unit; the unit cell of the three-period minimal curved surface comprises a diamond or diamond-like structure; the porous scaffold structure is made of a high-molecular polymer. Further, the superstructure glass carbon material can be obtained by pyrolyzing the porous scaffold structure. By designing a porous structure with uniform stress and stable mechanics, the high-strength glassy carbon material with accurate and controllable shape and size is developed, and the high-strength glassy carbon material has good application prospects in multiple fields.

The present invention discloses a SiC heterojunction transistor epitaxial structure and a device. The SiC heterojunction transistor epitaxial structure comprises, from bottom to top, a C-face 4H-SiC substrate, a 4H-SiC epitaxial layer, and an N-type 3C-SiC epitaxial layer. In the structure, the heterojunction formed by 3C-SiC and 4H-SiC has negligible thermal matching and lattice matching. 3C-SiC and 4H-SiC have a lattice matching structure. <0001> The lattice mismatch of the surface is less than 0.1%, which has a better interface structure.

The invention discloses an A2-level halogen-free flame-retardant and fireproof aluminum-plastic composite board and a preparation method thereof, and belongs to the technical field of special composite material preparation. The aluminum-plastic composite board comprises an aluminum panel and a core material. The core material is prepared by using 3-amino-4-hydroxybenzoic acid and trimellitic anhydride as raw materials to prepare a modified polyester monomer having a phenolic benzimide group, and then using hydroxylated norbornene benzimide as an initiator to copolymerize with phthalic anhydride, styrene oxide and the modified polyester monomer to prepare an intermediate product, and finally the intermediate product is copolymerized with ethylene under the action of a catalyst to prepare the intermediate product. The invention provides an A2-level halogen-free flame-retardant and fireproof aluminum-plastic composite board and a preparation method thereof by modifying components on the basis of polyethylene, and improves the flame retardancy of the aluminum-plastic board on the basis of keeping the organic core material light.

The invention discloses a heat insulation cotton felt. The heat insulation cotton felt is formed by curing and drying glass fibers sprayed with an adhesive. The adhesive is prepared from the following components in parts by weight: a modified phenolic resin solution, an organic silicon modified methyl methacrylate pre-polymerized solution, water, pentaerythritol, methyl emulsified silicone oil and dioctyl phthalate, the modified phenolic resin solution is obtained by the following steps: adding formaldehyde into a mixed solution consisting of phenol, xylenol and lignin, and reacting at the temperature of 40-60 DEG C to obtain a first solution; adding 5-15 parts by weight of a sodium hydroxide aqueous solution into the first solution to adjust the pH value of the first solution to 8-9, heating, cooling to 35-50 DEG C, adding sulfuric acid, and stirring to obtain a second solution; 20-40 parts of hexamethylol melamine is added into the second solution in batches. According to the heat insulation cotton felt, the resilience force of the glass fiber cotton felt is kept, and meanwhile the hydrophobic performance of the heat insulation and sound insulation module is improved.

The utility model relates to a cable, and aims to provide a missile matching composite cable which has the characteristics of high integration level and good performance. According to the technical scheme, the missile matching cable is characterized by comprising a cable core, an inner flame-retardant cushion layer, a total shielding layer, an outer flame-retardant cushion layer and an outer sheath, wherein the inner flame-retardant cushion layer, the total shielding layer, the outer flame-retardant cushion layer and the outer sheath sequentially wrap the cable core from inside to outside.

The invention provides a low-noise and low-vibration plunger pump fluid end which comprises a shell, an upper valve cover and a lower valve cover are sequentially arranged in the shell from top to bottom, a first bush is arranged on the surface of the upper valve cover, a second bush is arranged on the surface of the lower valve cover, a discharge valve seat is arranged in the shell and located below the upper valve cover, and a discharge valve is arranged in the shell and located below the lower valve cover. A fourth lining is arranged on the inner wall of the discharging valve seat, the suction valve seat is arranged in the shell and located below the lower valve cover, a fifth lining is arranged in the suction valve seat, and the bottom of the shell is connected with a supporting plate. According to the low-noise and low-vibration plunger pump fluid end, the multiple bushings are arranged in the device, the noise value can be effectively reduced when the whole device is used, meanwhile, the first bushing, the second bushing, the fourth bushing and the fifth bushing have the characteristics of abrasion resistance and high temperature resistance, the service life is longer, and the service life is prolonged. The spraying layer is arranged at the bottom of the supporting plate, so that the influence of the machining process on the vibration noise value is reduced, and the spraying layer has the damping effect.

The invention discloses a heat-resistant high-strength aluminum alloy and a preparation method thereof, and relates to the technical field of metal materials. The preparation method comprises the following steps: mixing metal erbium and metal titanium with other metal raw materials of the aluminum alloy, carrying out heat treatment on erbium and titanium to form a nano precipitated phase with a double-layer structure, and homogenizing a metal melt through ultrasonic treatment; metallic titanium and a metastable phase can form a complex strengthening phase at a high temperature, eutectic silicon and multi-phase metal form a compound net structure, and the heat resistance of the alloy is remarkably improved; secondly, porous boron carbide particles are prepared through vacuum sintering and ground to the nanoscale, the content of impurity elements is reduced after boronizing reaction, grains can be refined to form fine dispersed precipitated phases, growth of the grains is hindered, the recrystallization temperature is increased, and the heat resistance is optimized; the alloy is subjected to high pressure through two-stage cold pressing, so that gas in the alloy is exhausted and tightly combined, the strength and compactness of the alloy are further improved, and the mechanical property is improved. The prepared aluminum alloy has the effects of high strength and high heat resistance.

This invention discloses a high-performance meta-aramid / mica composite insulating paper and its preparation method. The paper is formed by wet papermaking and hot pressing of a mixed slurry composed of meta-aramid chopped fibers, meta-aramid precipitated fibers, and mica flakes. The composite insulating paper has a thermal decomposition temperature ≥425℃, tensile strength ≥52N / mm, tear strength ≥2.2N / mm, and voltage breakdown strength ≥13.8kV / mm. The mass ratio of chopped fibers to precipitated fibers is (50~80):(50~20). The amount of mica flakes added is 5wt%~10wt% of the total mass of the two aramid fibers. The hot pressing adopts a segmented hot pressing process of "low-temperature pre-pressing - medium-temperature strengthening - high-temperature setting". By controlling the key parameters of the precipitated fibers and optimizing the ratio of chopped fibers to precipitated fibers and the proportion of mica flakes added, the paper is prepared through processes such as raw material pretreatment, graded mixing and dissociation, wet papermaking, and segmented hot pressing. Advantages: Through multi-parameter coordinated control and process optimization, the technical bottlenecks such as the mechanical and insulation properties of existing aramid composite insulating paper and insufficient thermal stability have been solved.

The present application relates to the technical field of silver paste, and provides a low-temperature sintering silver paste with high sintering activity and a preparation method thereof. The low-temperature sintering silver paste comprises: 40 to 95 parts of micron or submicron silver powder, 0.5 to 10 parts of conductive low-temperature glass powder, 0.5 to 10 parts of resin, 0.1 to 5 parts of curing agent, 3 to 50 parts of solvent, and 0 to 10 parts of additives. The low-temperature sintering silver paste provided by the present application contains conductive low-temperature glass powder with low glass transition temperature, high low-temperature sintering activity and good sintering shrinkage characteristics, which can achieve good leveling and wetting characteristics at a lower temperature, promote the melting of micron or submicron silver powder in the silver paste, improve the compactness of the silver layer after low-temperature sintering of the silver paste, reduce the volume resistivity, and the molten low-temperature glass powder penetrates the TCO layer, and after solidification, nanosilver is regenerated at the interface of the TCO layer and the silicon layer to form ohmic contact with the silicon layer, thereby reducing the contact resistance. In addition, the cost of the silver paste can be significantly reduced.

The invention relates to the field of refractory materials, in particular to a low-temperature wear-resistant castable prepared from waste high-voltage electric porcelain and a preparation method of the low-temperature wear-resistant castable. The low-temperature wear-resistant castable prepared from the waste high-voltage electric porcelain comprises the following raw material components in percentage by weight: 50-54% of waste high-voltage electric porcelain aggregate, 10-15% of quartz sand, 10-16% of a binding agent, 3-5% of activated aluminum oxide micro powder, 3-5% of silicon micro powder, 4-7% of brown fused alumina powder and 3-5% of quartz powder. According to the invention, the design concepts of a high-temperature refractory material and low-temperature ultra-high performance concrete (UHPC) are integrated, the closest packing principle is adopted, solid waste high-voltage electric porcelain waste is used as aggregate particles, a reinforced matrix is formed, and a combination system is optimized; the low-temperature wear-resistant environment-friendly castable which achieves good integrity and use effect by means of self-combination of materials in a low-temperature environment (less than or equal to 300 DEG C) is prepared.

The utility model relates to cable technical field, concretely is a kind of low-temperature-resistant bending-resistant cable for plateau drilling device, including outer sheath, the inner sheath is arranged in outer sheath, fiber+tin-plated copper wire braiding reinforcing layer is arranged between the inner sheath with the outer sheath, the inner sheath is arranged in cable core, the cable core includes multiple control line core, each control line core includes conductor that is paired twisted distribution and is coated with insulating layer outside, and the screen shielding layer that is coated in paired conductor outside.The utility model provides a kind of low-temperature-resistant bending-resistant cable for plateau drilling device, is arranged by the outer sheath, insulating layer, paired twisted wire core, fiber+tin-plated copper wire braiding reinforcing layer, so that the cable has oil resistance, high strength, low-temperature resistance and good flexibility simultaneously, greatly increase the bending resistance of the cable.

The invention belongs to the technical field of refractory materials, and relates to a high-calcium-magnesium-calcium-titanium-zirconium brick for stainless steel smelting and a preparation method thereof. By preparing the high-calcium magnesium-calcium-zirconium sand, the magnesium-calcium-titanium sand and the composite binding agent for the oil shaft kiln, an existing magnesium-calcium brick for stainless steel smelting is replaced, and the high-calcium magnesium-calcium-titanium-zirconium brick has the advantages of being high in volume density, low in porosity and impurity content, more excellent in high-temperature resistance, erosion resistance, slag resistance and high-temperature abrasion resistance and the like; finally, the purpose of replacing a traditional magnesium-calcium brick refractory material for stainless steel smelting is achieved.

The invention discloses high-temperature-resistant fluorine-modified silicone grease and a preparation method thereof, and relates to the field of organic silicon resin materials, and the high-temperature-resistant fluorine-modified silicone grease comprises the following raw materials in parts by weight: 80-90 parts of fluorine-modified organic silicon resin, 10-20 parts of epoxy resin, 3-5 parts of nanoparticles and 1-3 parts of a curing agent. The high-temperature-resistant fluorine-modified silicone grease is prepared by mixing fluorine-modified organic silicon resin, epoxy resin and nanoparticles and then adding a curing agent for curing. The fluorine-modified organic silicon resin prepared by the preparation method disclosed by the invention is matched with other raw materials with specific dosages, so that the prepared fluorine-modified silicone grease can be endowed with relatively strong high-temperature resistance and mechanical property, and the fluorine-modified silicone grease can meet more stringent service and bearing requirements.

The application discloses a glass fiber cotton felt, and relates to the technical field of thermal and sound insulation materials. The glass fiber cotton felt is obtained by spraying an adhesive on glass fibers, curing and drying. A modified phenolic resin solution is obtained by the following steps: adding 200-300 parts by weight of formaldehyde to 100 parts by weight of a mixed solution composed of phenol, dimethyl phenol and lignin, and reacting at a temperature of 40-60 DEG C to obtain a first solution, wherein the weight ratio of the phenol, dimethyl phenol and lignin is 10:2-4:1-8. An organic silicon modified methyl methacrylate prepolymer solution is obtained by the following steps: adding 100-200 parts by weight of methyl methacrylate to 100 parts by weight of a mixed solution composed of a silicon source and an organic solvent, uniformly stirring, and then adding deionized water and an initiator. The glass fiber cotton felt of the application has excellent hydrophobic performance, and the hydrophobic rate of the glass fiber cotton felt reaches 99% while the resilience of the glass fiber cotton felt is maintained.

The invention provides a covalent organic framework membrane for waste acid recovery and power generation as well as a preparation method and application thereof, and relates to the technical field of wastewater separation and recovery. The covalent organic framework membrane is prepared from a PaTp-TMC membrane formed on the surface of a base material by using p-phenylenediamine, trialdehyde phloroglucinol and trimesoyl chloride, the covalent organic framework membrane is high in selectivity, ultrafast transmission of H < + > and efficient interception of other ions can be realized, two processes of waste acid recovery and power generation (osmotic energy conversion) can be completed at the same time, and the covalent organic framework membrane has good application prospects. And the efficiency of process application is greatly improved.

The invention discloses a glass fiber cotton felt which is formed by curing and drying glass fibers sprayed with an adhesive, and a modified phenolic resin solution is obtained by the following steps: adding 200-300 parts by weight of formaldehyde into 100 parts by weight of a mixed solution composed of phenol, xylenol and lignin, and stirring uniformly; reacting at the temperature of 40-60 DEG C to obtain a first solution, wherein the weight ratio of the phenol to the xylenol to the lignin is 10: (2-4): (1-8); the organic silicon modified methyl methacrylate prepolymer liquid is obtained by the following steps: adding 100-200 parts by weight of methyl methacrylate into 100 parts by weight of mixed liquid consisting of a silicon source and an organic solvent, uniformly stirring, and adding deionized water and an initiator. According to the glass fiber cotton felt, the resilience force of the glass fiber cotton felt is kept, the hydrophobic rate of the glass fiber cotton felt reaches 99%, and the hydrophobic performance is excellent.

The invention relates to the technical field of drilling fluid, and discloses a drilling fluid fluid loss reducer silicone-fluororesin composite and a preparation method thereof. The composite is prepared from the following components by mass fraction: 20-30% silicone-fluororesin, 8-12% dimethyldiallylammonium chloride, 6-10% acrylamide, 6-12% acrylonitrile, 12-14% 2-acrylamide-2-methylpropanesulfonic acid, 1-3% silane coupling agent and 2-4% initiator. The silicone-fluororesin composite is obtained by mixing the silicone-fluororesin and the drilling fluid fluid loss reducer, and the amide group, hydroxyl group and ester contained in the silicone-fluororesin and various groups in the drilling fluid fluid loss reducer act together to reduce fluid loss, improve high temperature resistance and salt resistance.

The utility model discloses a transparent visible dust cover which comprises a frame body and a cover, and the cover is installed on the frame body in a buckling position matching mode. A gasket is arranged on the inner side of the frame body and is used for carrying out auxiliary assembly on the cover; the frame body is provided with an observation window. The cover is simple and reasonable in structure and easy to assemble and disassemble, even if the cover is damaged, the cover can be independently replaced, the whole cover does not need to be replaced, gaskets made of EVA materials are arranged between the cover and the frame body and at the bottom of the frame body, and the cover has certain elasticity and has the advantages of being resistant to acid and alkali, low temperature, ozone and mildew and the like. When the cover is arranged in the frame body and the frame body is arranged on the surface of an object, the cover can be better attached to the object, due to the elasticity, the possibility that gaps exist can be reduced to a certain extent, and external gas or liquid is prevented from permeating into the interior needing to be protected. And the use requirements in more scenes can be met.

A flat transformer comprises a first magnetic core, a second magnetic core and a circuit board. The first magnetic core is provided with a base, a first magnetic column, a second magnetic column and a third magnetic column. The first magnetic column, the second magnetic column and the third magnetic column are formed on the top surface of the base. The circuit board comprises a first side end, a second side end and a through hole. The second magnetic column is sleeved with the through hole, and the first side end and the second side end protrude out of the first magnetic core. The first magnetic core is in butt joint with the second magnetic core, and the circuit board is arranged between the first magnetic core and the second magnetic core. At least one spacing assembly is arranged between the first magnetic core and the second magnetic core; or the first magnetic core and / or the second magnetic core are / is provided with a plurality of spacing components.

The present invention belongs to the technical field of refractory materials, and relates to a high calcium magnesium calcium titanium zirconium brick for stainless steel smelting and a preparation method thereof. The present invention aims to replace the existing magnesium calcium brick for stainless steel smelting by preparing high calcium magnesium calcium zirconium sand, magnesium calcium titanium sand, and composite binder for oil shaft kiln. The high calcium magnesium calcium titanium zirconium brick has the characteristics of high bulk density, low pores and low impurities, and better high temperature resistance, corrosion resistance, slag resistance and high temperature wear resistance, and finally meets the purpose of replacing the traditional magnesium calcium brick refractory material for stainless steel smelting.

The invention discloses a low-temperature sintering ceramic wire and a preparation method thereof, the low-temperature sintering ceramic wire comprises a conductor, a first insulating layer and a second insulating layer, the first insulating layer and the second insulating layer sequentially wrap the surface of the conductor, the first insulating layer is located between the conductor and the second insulating layer, and the second insulating layer is located between the conductor and the second insulating layer. The first insulating layer and the second insulating layer are subjected to a double-layer co-extrusion process to obtain the low-temperature sintered ceramic wire; the double-layer co-extrusion insulating layer comprises a LiMgPO4-based ceramic layer and a silicon rubber layer which are arranged from inside to outside; the preparation method of the ceramic layer comprises the following steps: S1, weighing 15 parts of lithium carbonate, 20 parts of magnesium oxide and 60 parts of ammonium dihydrogen phosphate, respectively adding the materials into a cosolvent, and carrying out ball milling for 24 hours; and drying the mixed powder at the temperature of 80 DEG C, and calcining at the temperature of 900 DEG C for 4 hours to obtain LiMgPO4 powder. According to the invention, the LiMgPO4-based ceramic is added in the first insulating layer, so that the ceramic wire capable of being sintered at low temperature has better anti-aging and high-temperature-resistant effects, is insulated, waterproof and anti-permeation, is particularly suitable for being used in outdoor high-temperature and low-temperature environments, can ensure the safety in use and prolong the service life, and can be prevented from being damaged even in an external severe environment. And long-term use and no deformation can be realized.

The utility model discloses a flexible low-voltage flame-retardant cable, which comprises a plurality of wire cores and a sheath used for wrapping the wire cores, and the structure of each wire core is sequentially provided with a conductor, a bulletproof wire and an insulating layer from inside to outside; fillers are arranged in gaps among the wire cores, the sheath is sequentially provided with a flame-retardant tape, an oxygen barrier layer, an armor layer, a water-blocking tape and an outer protective layer from inside to outside, and the conductors are sixth soft copper wires. The cable is reasonable in structural design, and has the following beneficial effects that the sixth soft copper wires are adopted, and a plurality of strands of fine copper wires are stranded in the same direction, so that the flexibility of the cable is greatly improved, the cable has better flexibility and bending resistance, the phenomenon of core breakage does not occur even if the cable is frequently bent for a long time, and the service life of the cable is prolonged. Meanwhile, the outer surfaces of the conductors in the wire cores are provided with the bulletproof wires which are twisted together, so that the toughness of the cable is further enhanced, and the tensile failure resistance is remarkably improved; and the water-blocking tape is arranged to prevent water and moisture from spreading longitudinally, so that a water-blocking effect is achieved.

The utility model relates to the technical field of shaping sleeves, and provides a wearable arm fat-reducing shaping sleeve, which comprises a first shaping sleeve body, a connecting soft belt, a plurality of cotton pads, a plurality of air holes, a second shaping sleeve body, a second shaping sleeve body, a plurality of air holes and a plurality of air holes, when the shaping sleeve is used, the wear-resisting layer is made of acrylic fibers, the service life of the shaping sleeve is prolonged, surface abrasion is reduced, the breathable layer is made of breathable fabric, the breathable effect is achieved, and the situation that sweat on the surface of an arm cannot be volatilized in time when people wear the shaping sleeve is avoided. The anti-corrosion layer is made of Teflon fabric and has the characteristics of high temperature resistance, low temperature resistance, corrosion resistance, dirt resistance, water resistance and fire resistance, and the sweat absorption layer is made of all cotton and has a certain sweat absorption effect.

The invention discloses a cold laminating film for protection. A sound insulation cotton felt is formed by curing and drying glass fibers sprayed with an adhesive; the adhesive is prepared from the following components in parts by weight: a modified phenolic resin solution, an organic silicon modified methyl methacrylate pre-polymerized solution, water, pentaerythritol, methyl emulsified silicone oil and dioctyl phthalate, the organic silicon modified methyl methacrylate prepolymerization liquid is obtained by the following steps: adding 100-200 parts by weight of methyl methacrylate into 100 parts by weight of mixed liquid consisting of a silicon source and an organic solvent, uniformly stirring, and adding deionized water and an initiator to obtain the organic silicon modified methyl methacrylate prepolymerization liquid; the silicon source is formed by mixing tetraethyl orthosilicate and a silane coupling agent, and the weight ratio of the tetraethyl orthosilicate to the silane coupling agent is (1-3): 1. The hydrophobic performance of the heat insulation and sound insulation module is improved, the contact angle of the glass fiber cotton felt reaches 143 degrees, and the hydrophobic performance is excellent.

The utility model discloses a composite solar mirror field photovoltaic cable, which relates to the technical field of cables and comprises a cable body. A plurality of signal cable cores; the composite solar mirror field photovoltaic cable provided by the embodiment of the utility model has the beneficial effects that the plurality of cable cores and the plurality of signal cable cores are compounded together, so that the composite solar mirror field photovoltaic cable is convenient to lay at one time, and the cost of laying for multiple times is reduced; meanwhile, the used material has the characteristics of high temperature resistance and low temperature resistance, and the conductor characteristic impedance performance is good; and the steel belt armoring and the anti-radiation photovoltaic sheath are applied, so that the safety performance is greatly improved.