46 results about "High performance polymer" patented technology

The invention discloses a method for continuously synthesizing thermoplastic polyimide through polymerization-extrusion granulation, and relates to the technical field of high-performance polymer synthesis, and the method comprises the following specific steps: mixing dianhydride and diamine monomer according to a ratio, and reacting in a water-containing solvent or a pure water phase to obtain an oligomer mixture; carrying out flash evaporation under the negative pressure of-0.01 to-0.1 MPa to recover the solvent / water, so as to obtain polyimide oligomer powder; drying the powder, mixing the dried powder with an auxiliary agent and other flexibilizers, carrying out stepped heat treatment in a nitrogen atmosphere, conveying the mixture into a screw machine through a screw, extruding, and pelletizing to obtain thermoplastic polyimide particles; the continuous production of the thermoplastic polyimide is realized by integrating core procedures, and the material loss and the time cost are reduced; and auxiliary materials such as the antioxidant and the flexibilizer are added, so that the product performance is improved, the application range is widened, and efficient and low-carbon production is realized.

A magnetic field-assisted additive manufacturing (MFAAM) system and method for fabricating anisotropic bonded magnets. The system includes a magnetic field source assembly including a modular Halbach holder, an inner Halbach holder, and a Halbach cylinder configured to provide a magnetic field for aligning magnetic fillers within a polymer matrix during extrusion. The field gradient of the Halbach cylinder is less than 0.0005 T / mm allowing to obtain high print quality in a large magnetic field. To enable high-temperature processing, the assembly incorporates a cooling casing fluidly coupled to a cooling medium. This active thermal management maintains the Halbach cylinder below a threshold temperature while a heated nozzle extrudes the composite material at temperatures sufficient to melt high-performance polymers. The integration of the magnetic source and cooling jacket allows for the precise alignment of magnetic domains in high-viscosity matrices, resulting in 3D-printed bonded magnets with consistent magnetic anisotropy and improved structural properties.

The invention belongs to the technical field of thermal protection materials, and particularly relates to a high-performance polymer flexible ablation thermal protection material capable of generating high-temperature-resistant ceramic in situ. Through molecular design, the zirconium-containing vinyl silicone oil (VZSO) is synthesized, and high-temperature-resistant ceramic can be generated in an ablation environment. VZSO and vinyl silicone oil are linked through polymethylhydrosiloxane through a hydrosilylation reaction, VZSO modified silicone rubber (VZSO-SR) is obtained, and molecular-level compatibility and covalent binding of a zirconium-containing unit and a siloxane molecular chain are achieved. The VZSO-SR has high heat residual weight in the air; in addition, the VZSO-SR also has excellent ablation resistance, and can effectively reinforce the carbon layer through in-situ generation of high-temperature-resistant t-ZrO2 ceramic. The VZSO-SR provided by the invention provides a new material choice for developing a high-performance polymer flexible ablation-resistant material suitable for an ultrahigh-temperature environment, and has a good application prospect.

This invention discloses a high-performance polymer electrolyte based on a functionalized fluorinated ether diluent and its preparation method, relating to the field of electrochemical energy storage materials technology. The high-performance polymer electrolyte comprises: a polymer matrix, a lithium salt, an organic dispersion solvent, and a functionalized fluorinated ether diluent. By introducing a fluorinated ether diluent with a specific structure, this invention synergistically regulates the crystallization behavior of the polymer matrix and the lithium-ion solvation structure, solving core problems in traditional polymer electrolytes such as low ionic conductivity, poor interfacial stability, and lithium dendrite growth. The resulting electrolyte possesses high ionic conductivity, high lithium-ion transference number, and excellent interfacial stability, making it suitable for high-energy-density lithium metal batteries.

The invention relates to a plug flow type prepolymerization device, and aims to realize transition or conversion from a batch polymerization process to a continuous polymerization process. The device comprises a specially designed compact reactor body, wherein heat transfer elements are integrated on the wall surface and a shaft of the reactor body; the special stirring system is provided with a wall type stirrer and a central stirrer which can be independently operated; the plurality of feed ports are used for accurately controlling and uniformly dispersing an initiator, a monomer, a solvent and an additive; and an optimized temperature distribution system. This design minimizes the formation of gels and color while ensuring controllable reaction kinetics. The device can promote the production of a polymer with controllable molecular weight distribution, synthesizes a functionalized polymer precursor when a specific functional agent is added, and is used for the production of a special high-performance polymer, so that the flexibility of the process is improved, the consistency is improved, and the cycle time is shortened.

The utility model discloses a lightweight high-strength communication cable, which comprises a conductor assembly, an insulating layer, a shielding layer, an enhancement layer and an outer protective layer, the conductor assembly is composed of a silver-coated copper wire, the diameter of the silver-coated copper wire is set to be 0.5 mm, the conductor assembly is of a multi-core structure composed of a plurality of silver-coated copper wires, and the outer protective layer is arranged between the plurality of silver-coated copper wires. The shielding layer is composed of a shielding layer inner layer and a shielding layer outer layer, the shielding layer inner layer is made of a silver-plated polyester film, the shielding layer outer layer is made of a woven nickel-coated aluminum metal net, the reinforcing layer is composed of a first reinforcing layer and a second reinforcing layer, the first reinforcing layer is made of Kevlar fiber braided fabric, and the second reinforcing layer is made of a Kevlar fiber braided fabric. And the reinforcing layer II is made of a high-performance polymer. Through the above structure, compared with a traditional steel or metal enhancement layer, the cable is light in weight and high in strength, the overall weight of the cable is further greatly reduced, installation and maintenance are convenient, the effect of double shielding layers is achieved, and signal integrity and anti-interference performance are guaranteed.

The invention belongs to the technical field of functional stealth coatings, and particularly relates to a wide-frequency-band heat-insulation stealth multi-layer composite coating and a preparation method thereof.The wide-frequency-band heat-insulation stealth multi-layer composite coating comprises a bottom layer, a middle layer and a surface layer which are sequentially coated on the surface of a base material; the bottom layer comprises high-performance polymer resin, a curing agent, a magnetic absorbent, 10-30% of a conductive / dielectric loss agent, an inorganic filler, a coloring pigment, an auxiliary agent and a diluent; the middle layer comprises polymer matrix resin, a cross-linking agent, a high-thermal-conductivity filler, a low-infrared-emissivity material, a microencapsulated phase change material, an auxiliary agent and a diluent; the surface layer comprises weather-resistant resin, a cross-linking agent, a multispectral compatible pigment, a flaky protective filler, a wear-resistant filler, an auxiliary agent and a diluent. The functional layers have excellent compatibility, the surface layer does not damage the wave absorbing performance of the bottom layer and the infrared regulation and control function of the middle layer, the middle layer guarantees the heat diffusion efficiency and does not affect the electromagnetic loss of the bottom layer, the performance stability can be maintained for a long time through strict aging verification, and the equipment maintenance period is greatly prolonged.

The shuttle and door ring assembly comprises an intelligent lubricating composite phase composed of a hydrogenated nitrile rubber thermally-induced softening phase and a solid lubricant, a high-performance polymer and a multi-scale heat conduction network are supplemented, and when equipment runs at a high speed to generate friction heat or vibration, mechanical energy can be efficiently converted into heat energy; and the heat triggers the intelligent lubricating composite phase to generate phase change, so that the solid lubricant is actively and controllably released to a friction interface, and an efficient lubricating film is formed. The problems that a traditional shuttle is fast in abrasion and large in vibration noise, relies on grease lubrication and the like are solved, the operation efficiency and the fabric quality of the circular weaving machine are remarkably improved, the service life of the circular weaving machine is remarkably prolonged, and long-acting self-lubrication, vibration reduction, noise reduction and clean production are achieved.

The invention discloses an oxygen vacancy enriched lithium-doped zinc oxide nanotube reinforced polyethylene oxide (PEO)-based solid electrolyte and a preparation method thereof. The electrolyte takes PEO as a polymer matrix, lithium bis (trifluoromethanesulfonimide) (LiTFSI) as a lithium salt, and a three-dimensional hollow ZnO nanotube (LZN) doped with a lithium element as an inorganic reinforcing filler. By introducing Li < + > into ZnO crystal lattices for doping, a large number of positively charged oxygen vacancies can be induced to form, and the oxygen vacancies as Lewis acid sites have strong interaction with lithium salt anions to promote dissociation of lithium salt, so that the free Li concentration and ion mobility in the system are improved. The three-dimensional interconnection structure of the hollow nanotube constructs a continuous organic-inorganic ion transmission channel at the same time, so that the interface impedance is further reduced, and the overall ionic conductivity of the electrolyte is improved. The Li < + > conductivity of the prepared composite solid electrolyte at 60 DEG C can reach 8.12 * 10 <-4 > S / cm, and the composite solid electrolyte has excellent electrochemical stability and high coulombic efficiency. LiFePO4 / Li and NCM622 / Li all-solid-state batteries assembled by using the electrolyte membrane show good cycling stability and high-voltage adaptability. Through collaborative design of oxygen vacancy engineering and a hollow structure, the comprehensive performance of the polymer electrolyte is remarkably improved, and a new solution is provided for development of a high-energy-density and long-service-life all-solid-state lithium battery.

The invention relates to the technical field of high-performance polymer fiber manufacturing, in particular to a low-processing-viscosity liquid crystal polyarylester fiber and a preparation method thereof.The preparation method comprises the steps that S1, p-hydroxybenzoic acid and 2-hydroxy-6-naphthoic acid serve as monomers, and an acetylation reaction is conducted in the presence of an acetylation reagent and a catalyst; the preparation method comprises the following steps: firstly, preparing LCP resin, then carrying out melt polycondensation reaction, adding 6-acetoxy-2-naphthoic acid at the later stage of the melt polycondensation reaction, stirring and dispersing, discharging, cooling and granulating to obtain the LCP resin; and S2, carrying out melt spinning and heat treatment on the LCP resin to obtain the liquid crystal polyarylate fiber. According to the preparation method, the melt processing viscosity of the resin can be remarkably reduced, the production smoothness is improved, the heat treatment time is shortened, the production energy consumption is reduced, the high molecular weight potential of the resin in spinning processing is not influenced, and the liquid crystal polyarylate fiber is ensured to have very good strength performance.

The invention belongs to the technical field of melt spinning, and discloses a self-reinforced PA66 high-strength fiber as well as a preparation method and application thereof. Based on a PA66 / PA6 blending system, the characteristic that PA6 is high in crystallization rate in the melt stretching process is utilized, and a fibrous crystal template is promoted to be formed firstly; then, the PA66 is used as a nucleation substrate, epiphytic crystallization is carried out, and a shish-kebab composite structure with PA6 fiber crystals as a framework and PA66 epitaxially growing in the axial direction is constructed. The special oriented structure is further perfected and cured through subsequent annealing treatment, and the macroscopic mechanical property of the fiber is remarkably improved, so that an efficient and self-reinforced polymer blend fiber preparation strategy is realized. The method provides an important reference for designing a high-performance polymer material by regulating and controlling multi-component crystallization behaviors and microstructures.

The invention relates to a low-creep polypropylene composite material easy for infrared welding as well as a preparation method and application thereof. The polypropylene composite material comprises the following components in parts by weight: 0-55 parts of polypropylene, 20-75 parts of a high-performance polymer, 20-40 parts of fibers, 3-8 parts of a compatilizer, 0.5-3 parts of an antioxidant, 0.2-2 parts of a light stabilizer and 0.2-2 parts of a lubricant. The high-performance polymer is formed by compounding a propylene-butylene copolymer, ultra-high molecular weight polyethylene and polyether amine through electrostatic spinning, high-temperature movement of a polypropylene molecular chain is inhibited by utilizing a macromolecular extended chain crystal structure, and the creep resistance is remarkably improved; amino is introduced through polyether amine, energy is concentrated on an interface by means of high sensitivity of polyether amine to infrared light, efficient local fusion is achieved, and infrared weldability is improved. The material has the characteristics of high strength, low creep deformation and easiness in infrared welding, and is particularly suitable for high-requirement parts such as automobile plugs and runner plates.

The invention discloses a method for modifying phthalonitrile resin through in-situ blending of polydopamine nano-microspheres, a composite material prepared by the method and application of the composite material, and belongs to the technical field of processing of high-performance polymer materials and composite systems of the high-performance polymer materials. The problems that existing phthalonitrile resin is difficult to blend and modify uniformly, the mechanical property is limited and the like are solved. A uniformly deposited polydopamine nano structure is constructed on the surface of a carbon fiber fabric, functional groups such as phenolic hydroxyl groups and amino groups in polydopamine microspheres are utilized to induce phthalonitrile resin to be subjected to an in-situ blending reaction with the carbon fiber fabric at a high temperature, and a three-dimensional reaction area with fiber-polydopamine microsphere-phthalonitrile resin as a continuous path is constructed; a cross-linked network which is compact in structure, continuous in bonding and three-dimensional synergistic is formed, so that the high-temperature mechanical bearing capacity and the high-temperature thermal exposure residual performance of the obtained composite material are remarkably improved while the excellent thermal stability of the composite material is maintained, and the composite material is suitable for the fields of aerospace, high-temperature structural parts and the like.

The invention concerns a phosphoric acid ester of Formula (I) or (II), wherein: A, B and R represents an aliphatic, cycloaliphatic and / or aromatic moiety; Q represents —CH2—, —O— or —COO—; n+m is inferior to 3; and X+Y is less than 7, and wherein the phosphoric acid ester has an average molecular weight Mn of 70 to 10,000 g / mol. The invention also concern the process for making the phosphoric acid ester of Formula (I) or (II), and there us as dispersants of particles in a liquid medium, such as water, solvent, plasticizer or resin. Advantageously, the process allows the preparation of new high performing polymeric phosphate esters with less acidic character that are majorly a phosphate diester. Also, a 100% active liquid solvent free polyester phosphate ester can be effectively prepared.

This invention belongs to the field of polymer material design technology, specifically a high-performance multi-objective reverse design method for polymers based on Graph Attention Network (GAT) and Non-Dominated Sorting Genetic Algorithm II (NSGA-II). The method includes: performing self-supervised comparative pre-training on the GAT encoder, and fine-tuning it through supervised learning to adapt it to the polymer property prediction task; calculating the dielectric constant (k) or glass transition temperature (k) of the substituent by comparing the predicted values ​​before and after deletion. T g The contribution value of ) is obtained to obtain a robust contribution law; the target performance of polymer materials is optimized through substituent modification, thereby meeting the needs of high-performance electronic applications; this invention can simultaneously optimize low-k and high-k values. T g It improves the accuracy and generalization ability of property prediction; generates candidate structures superior to baseline molecules in different systems; and the optimized candidate molecules maintain improved overall performance while having reasonable synthetic accessibility scores, making them valuable for further experimental synthesis and screening.

The invention belongs to the technical field of high-performance polymer foam materials, and particularly relates to open-cell polymethacrylimide foam and a preparation method thereof. The preparation method comprises the following steps: mixing an acrylamide monomer, an acrylic monomer, a cross-linking agent, an initiator, a first water-soluble polymer, water and a stabilizer to obtain a first water phase; adding the second water phase into the first water phase, and mixing with a reducing agent to obtain a water-in-water emulsion; the second water phase is immiscible with the first water; and carrying out polymerization reaction on the water-in-water emulsion, and sequentially washing, drying and carrying out thermal imidization to obtain the polymethacrylimide foam. The low-toxicity acrylamide monomer is adopted to replace an acrylonitrile monomer with high toxicity and high cost, and a water-in-water emulsion template method is combined to prepare the foam material, so that the use of an organic solvent is avoided, and the post-treatment process is simplified. The method is simple, environment-friendly and suitable for large-scale production, and the obtained foam material has high aperture ratio.

This invention relates to the field of organic synthesis technology and discloses a crown-ether aromatic dicarboxylic acid and its preparation method. The crown-ether aromatic dicarboxylic acid has the structure of Formula 1, wherein Ar1 represents crown ether units with different numbers of crowns, where n takes the value of 4-10, and Ar2 is a side chain substituent, which can be selected from one or more of H, halogen, -OH, -SO3, -NO2, and -H2PO4. The preparation of the crown-ether aromatic dicarboxylic acid provided by this invention is divided into two steps. First, the aromatic crown ether containing a benzene ring reacts with acetyl chloride in a low-boiling-point organic solvent to generate an acetyl aromatic crown ether. The organic solvent is removed by rotary evaporation, reducing complex purification steps. Finally, the crown-ether aromatic dicarboxylic acid is prepared by oxidation in liquid bromine and 1,4-dioxane. The synthesized crown-ether aromatic dicarboxylic acid is prepared in two continuous steps, with high purity, suitable cost, and applicable to large-scale production processes. It has important application value in the preparation of polyesters, polyamides, polybenzimidazoles, polybenzothiazoles, and related high-performance polymers and pharmaceutical intermediates.

The invention discloses a high-performance polymer interpenetrating network and a preparation method thereof. The preparation method comprises the following steps: 1) mixing alkynylated polyethylene glycol, dimethyl ethylenediamine, trimethylolpropane tripropiolate and a monodentate ligand in a first solvent for reaction, adding palladium acetate and the tridentate ligand for coordination reaction after the reaction is finished, and removing the first solvent after the coordination reaction is finished to obtain a polyethylene glycol network; and 2) in the presence or absence of a catalyst, mixing the polyethylene glycol network, polyol, a chain extender, polyisocyanate and a cross-linking agent to react to obtain a polyethylene glycol-polyurethane polymer interpenetrating network, and curing to obtain the high-performance polymer interpenetrating network. According to the invention, the mechanical property and energy absorption capacity of polyurethane and polyethylene glycol can be enhanced, so that the material can bear higher stress level, the toughness of the material is improved, and the maximum extensibility and plastic deformation capacity of the material are improved while the original strength of a polymer is maintained.

The invention belongs to the technical field of polymer functional membrane materials and electrochemistry, and provides a hydrogen bond network enhanced anion exchange membrane and a preparation method and application thereof.A hydroxyalkyl chain with the molar ratio of 5-15% is grafted to the side chain of a p-terphenyl / N-methyl-4-piperidone polymer, and the hydroxyalkyl chain is blended with limited 3-20 wt% of PVA, so that the hydrogen bond network enhanced anion exchange membrane is obtained. The hydrogen bond network enhanced anion exchange membrane is successfully constructed. The prepared anion exchange membrane shows water electrolysis performance comparable to that of a pure high-performance polymer membrane, meanwhile, better mechanical toughness and controllable swelling behavior are obtained, the material cost is remarkably reduced, and the anion exchange membrane has good operation stability. And the process is simple, the raw materials are easy to obtain, and a material solution with great industrialization prospects is provided for developing the AEMWE technology with high performance, low cost and long service life.

The invention discloses a preparation method of a polyethylene-poly (butylene adipate / terephthalate)-carbon nanofiber composite material, which is characterized in that PE / PBAT / CNFs are used as basic raw materials, the CNFs are subjected to surface modification through dopamine, and a compatilizer is introduced, so that the interfacial compatibility of PE and PBAT is optimized, and the high-impact PE-based ternary nanocomposite material is successfully prepared. The method provides a theoretical basis for designing a high-performance polymer nano-composite system, and has application value in the fields of green packaging, engineering plastics and the like. The comprehensive mechanical property of the prepared composite material is the best and is greatly improved compared with that of a PE matrix; a denser network structure is formed in a local area, the interface area is increased, the enhanced interface interaction is beneficial to energy absorption and plastic deformation, and the impact resistance of the material is improved.

The invention discloses a preparation method of a polyetherimide / metal organic framework composite medium with high insulating property, which comprises the following steps of: performing ligand exchange reaction on a Znsite with coordination capability in 2-methylimidazole zinc salt (ZIF-8) and a polyetherimide (PEI) monomer 4, 4 '-diaminodiphenyl ether (ODA) through thermal field activation in an imidization process of the polyetherimide (PEI), and performing thermal field activation to obtain the polyetherimide / metal organic framework composite medium with high insulating property. A cross-scale multi-site bonding network is formed, so that close combination of 2-methylimidazole zinc salt (ZIF-8) and a polyetherimide (PEI) matrix is realized on a molecular level; the problems of interface defects, uneven dispersion, weak bonding and the like in a traditional composite medium are effectively solved, the breakdown strength of the composite film is remarkably improved, leakage current and dielectric loss are inhibited, meanwhile, excellent frequency stability and high-temperature insulation performance are kept, and a new thought is provided for development of high-performance polymer insulation materials.

This invention relates to the field of high-performance polymer-based composite materials, specifically providing a high-strength, high-toughness, and moisture-heat-resistant glass fiber reinforced epoxy resin composite material and its preparation method. The composite material comprises, by weight: Component A: epoxy resin component, 100 parts; Component B: curing agent component, 26-35 parts; reinforcement: glass fiber fabric with a functional polymer layer grafted onto its surface, 150-250 parts; interface reinforcement: amino-terminated hyperbranched polyester, 3-8 parts; moisture-heat-resistant additive: amino-modified nano-graphene oxide, 0.5-2 parts. This invention achieves strong interfacial bonding between the glass fiber and the resin matrix, high toughness of the resin matrix, and excellent overall moisture-heat resistance of the composite material through the synergistic design of the multi-scale structure of the reinforcement surface, resin matrix, and interface region. This effectively solves the problems of fragile interfacial bonding, severe degradation of mechanical properties under humid and hot environments, and the difficulty in simultaneously achieving toughening and stiffness enhancement in existing technologies.

The present application relates to a kind of polycaprolactone upgrading recovery method, belong to polymer chemistry technical field.The method provided by the present application is that polycaprolactone, diamine or amino alcohol, ruthenium catalyst are mixed in solvent, heated 1-80h one-pot method upgrading preparation polyester amide and polyamide polymer material in the temperature range of 80 ℃-240 ℃, the properties of the obtained polymer can be adjusted by changing the type and feeding ratio of diamine or amino alcohol, and the number average molecular weight is 1000-500,000.The present application uses waste polycaprolactone and commercial catalyst as raw material, reaction condition is mild, byproduct is only hydrogen, and the requirement to production equipment is low, in solving plastic pollution, high performance polymer can also be prepared, meet the principles of green, efficient and safe production.

The application provides a high-performance polymer fiber-based aerogel fiber and a preparation method and application thereof, and the preparation method comprises the following steps: using a gel spinning technology to obtain a high-performance polymer gel fiber by using a proton absorber in a coagulation bath through a high-performance polymer fiber precursor; and then sequentially performing solvent replacement, aging, drying and heat treatment to obtain the high-performance polymer fiber-based aerogel fiber; wherein the high-performance polymer fiber precursor is a homogeneous nanofiber dispersion liquid prepared by solution reaction of a high-performance polymer and a first protonic acid. The high-performance polymer fiber-based aerogel fiber is prepared by the method of dissolving the polymer by using the protonic acid and supplemented by adding the proton absorber, and has the characteristics of high strength, low thermal conductivity, high porosity, continuous spinnability, good flexibility, strong weavability and excellent skeleton structure stability.

The invention belongs to the technical field of high-performance polymer materials and advanced micro-packaging, and relates to a hyperbranched polyimide embedding material as well as a preparation method and application thereof. The method comprises the following steps: dropwise adding a prepared hyperbranched polyimide solution with an active group as a terminal group into a functional material to be embedded, and carrying out suction filtration and drying to obtain embedded powder; the obtained embedding powder is placed in a supercritical carbon dioxide device, the hyperbranched polyimide embedding material generates a large number of pores by regulating and controlling the temperature, pressure and time and utilizing the swelling, plasticizing and extremely strong permeation and diffusion capabilities of supercritical carbon dioxide to hyperbranched polyimide with active groups, the specific surface area of the material is increased, and the hyperbranched polyimide embedding material is prepared. Finally, the composite material with a porous structure, high embedding rate and well protected activity of functional substances is obtained. According to the hyperbranched polyimide embedding material prepared by the method, the stability of functional substances can be improved, and the compatibility with an addition system can also be improved.

This invention relates to a high-performance polymer-cement-based composite repair material and its preparation method. The high-performance polymer-cement-based composite repair material, by mass fraction, comprises the following components: 690-710 parts cement; 130-150 parts fly ash; 45-55 parts silica fume; 200-210 parts mixing water; 950-1050 parts fine aggregate; 21-23 parts modified polymer; 9-10 parts expansion agent; 4-5 parts water-reducing agent; 5-6 parts modified fiber; and 0.16-0.18 parts defoamer. This invention utilizes nano-toughened modified polymer and modified fiber. The nano-modified polymer improves the microstructure of the repair material, while the modified fiber limits shrinkage and enhances the crack resistance of the matrix. The synergistic effect of both effectively improves the toughness and mechanical properties of the repair material, ensuring that early cracking does not occur.

The present application relates to the field of soap-free high solid content film forming emulsion preparation technology, and particularly relates to a preparation method of silica-polymer microsphere emulsion. A small particle size, high solid content silica-polymer microsphere emulsion is prepared by Pickering emulsion polymerization. The preparation method comprises the following steps: S1, preparing a reaction solution: preparing a silica aqueous dispersion; S2, preparing an initiator solution; S3, slowly dropping the initiator solution and monomers into the reaction solution after temperature rising and nitrogen removal, and a small particle size silica-polymer microsphere film forming emulsion can be obtained after polymerization. The preparation method of the present application can control the morphology of the polymer microspheres and further control the particle size of the silica-polymer microspheres by controlling the dropping time of the monomers and the initiator without adding other substances; the method is simple. Due to the advantages of no surface activation, uniform doping of inorganic particles and small particle size, the film forming performance is good, and the method has great application value in the field of water-based anticorrosive coatings.

This invention belongs to the technical field of lithium battery electrolytes, and discloses a high-performance polymer solid electrolyte prepared by in-situ polymerization, along with its method and application. The method involves: 1) mixing an ionic liquid, 1,3-dioxolane, a lithium salt, a lithium salt initiator, and a plasticizer to obtain a copolymer precursor solution; 2) placing the copolymer precursor solution on a battery membrane carrier and polymerizing it at 50-75°C to obtain the high-performance polymer solid electrolyte. The electrolyte of this invention effectively inhibits the growth of lithium dendrites, exhibits good ionic conductivity, provides a rapid lithium-ion transport pathway, and achieves high battery safety and high cycle stability. The electrolyte of this invention can be used in lithium-ion batteries, asymmetric lithium metal batteries, or symmetric batteries.

According to the present invention, a tube-in-tube assembly (1), an apparatus (21), a system (100) and a method for integrated condensation and evaporation is disclosed. The assembly have high chemical, mechanical and thermal stability. The assembly provides a large surface area for combined condensation and evaporation for Multi-stage Flash (MSF), Multi-Effect (ME), and Mechanical Vapor Recompression (MVR) systems. The apparatus comprises of a housing (5) arranged to secure at least two tube-in-tube assemblies (1a, 1b), each comprising an outer tube (2) and an inner tube (3), at least three tube sheets (17, 18, 19) positioned between the at least two tube-in-tube assemblies (1a, 1b), and a plurality of inlets and outlets. The tube-in-tube assembly is fabricated with high performance polymers reinforced with graphite.

An adjustable clip for securing a protective mesh to a solar panel is disclosed. The clip includes a main body having a curved profile configured to partially encircle a wire of the protective mesh and engage the edge of a solar panel frame. One or more insertable heads are slideably coupled to the main body to vary the gripping dimension of the clip, allowing it to accommodate different panel frame thicknesses and mesh gauges. The inner surface of the main body includes gripping protrusions and stabilizers that distribute load evenly, prevent slippage, and enhance structural rigidity. The clip may be formed from polytetrafluoroethylene (PTFE), other high-performance polymers, metallic materials, or fiber-reinforced composites such as carbon-or glass-fiber-reinforced polymers. The adjustable configuration provides a durable, reusable, and universally compatible fastening solution for securing protective mesh to a variety of solar panel installations.