769 results about "Surface energy" patented technology

The invention relates to a deicing super-hydrophobic coating based on MXene, a coating, a preparation method and application of the coating. The coating comprises the following components in percentage by mass: 2%-5% of a super-hydrophobic modified MXene photo-thermal material, 2%-5% of epoxy resin, 0.5%-1.5% of an epoxy resin curing agent, 0.5%-1.5% of PDMS, 0.05%-0.15% of a PDMS curing agent and 80%-90% of a diluent. Wherein the super-hydrophobic modified MXene photo-thermal material is MXene powder treated by fluorine-free long-chain silane, and the super-hydrophobic modified MXene photo-thermal material is a super-hydrophobic modified MXene photo-thermal material. MXene with excellent photo-thermal conversion performance is used as a photo-thermal material, fluorine-free long-chain silane is used for performing low-surface-energy hydrophobic modification on the MXene material, environmental pollution caused by perfluorinated or polyfluorinated organic compounds is avoided, photo-thermal performance and super-hydrophobic performance are integrated, the advantages of a super-hydrophobic coating and a photo-thermal coating are integrated, and the application prospect is wide. The deicing super-hydrophobic coating based on MXene can be used for passive ice prevention and active photo-thermal deicing.

This invention belongs to the field of marine antifouling, and specifically relates to a transparent, self-lubricating organosilicon hybrid antifouling coating with a negatively charged surface and its preparation method. The antifouling coating is obtained by a sol-gel reaction of modified nanocellulose, hydroxy acid, and functional fluorine / siloxane monomers; the mass ratio of the hydroxy acid to the modified nanocellulose is 10–100:1; the mass ratio of the functional fluorine / siloxane monomer to the modified nanocellulose is 10–300:1. This invention, based on a multi-element green antifouling strategy, constructs a material surface with negative charge, self-lubrication, and low surface energy. The prepared antifouling coating exhibits excellent transparency, mechanical properties, and static antifouling performance. This antifouling coating is environmentally friendly and has broad application prospects in the field of marine antifouling.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention discloses a super-hydrophobic road ice-inhibiting coating based on a photothermal effect and nano modified particles and a preparation method of the super-hydrophobic road ice-inhibiting coating. The preparation method comprises the following steps: introducing silane modified nano silicon dioxide (SiO2) and titanium dioxide (TiO2) particles into a polyaniline solution, and preparing the composite super-hydrophobic powder through a chemical oxidation polymerization method. The preparation method comprises the following steps: firstly, modifying the surfaces of SiO2 and TiO2 nanoparticles by adopting a silane coupling agent, and endowing the SiO2 and TiO2 nanoparticles with low surface energy and hydrophobic property; and then adding the modified nano-particles into an aniline monomer solution, reacting with doped acid and an oxidizing agent, so that polyaniline molecules are subjected to in-situ polymerization on the surfaces of the particles, and the composite super-hydrophobic powder with a micro-nano structure is formed. The obtained composite material has excellent photothermal conversion performance and super-hydrophobic performance at the same time, and the efficient photothermal material heat absorption ice melting effect and the synergistic ice restraining effect of the photothermal material and the super-hydrophobic material can be achieved. Compared with a traditional ice-inhibiting coating, the coating disclosed by the invention shows stronger ice-resisting capability in a low-temperature and high-humidity environment, has good durability, mechanical stability and environmental protection property, and is suitable for the field of ice prevention and ice inhibition in cold regions such as roads, bridges, airport runways and the like.

The invention relates to the technical field of photovoltaic module frames, in particular to a self-cleaning weather-proof aluminum alloy photovoltaic module frame and a preparation method thereof, and aims to improve the self-cleaning capacity of the photovoltaic module frame, a layer of self-cleaning coating is prepared on the basis of an aluminum alloy frame body. The boric acid ester chain extender containing the fluorine element and the fluorine-containing polyol are added, and the fluorine element has extremely strong electronegativity, so that the water resistance of the resin can be effectively improved, the surface energy of the material is reduced, the surface friction is reduced, the friction resistance is improved, the adsorption of dust on the surface of a metal frame can be reduced, and the material is kept clean for a long time; a reversible covalent bond boric acid ester bond is further introduced into the boric acid ester chain extender, so that the purpose of self-repairing is achieved, hydrophobic nano-silica is further added into the coating, the friction resistance and hydrophobic capacity of the aluminum alloy photovoltaic module frame are further improved, and the service life of the aluminum alloy photovoltaic module frame is prolonged. And the durability of the material exposed in an external atmospheric environment is improved.

The invention provides a method for calibrating a rolling friction coefficient and surface energy in a process of simulating a ceramic membrane to filter lignin by DEM-CFD, develops a semi-analytical DEM-CFD coupling interface, and on the basis, takes movement and deposition behaviors of lignin particles in a process of filtering black liquor lignin by a single ceramic membrane pore as research objects, and provides a method for calibrating the rolling friction coefficient and the surface energy in the process of simulating the ceramic membrane to filter the black liquor lignin. The capturing mechanism of lignin particles in a ceramic membrane is researched, and it is determined that key factors influencing lignin particle deposition morphology, average coordination number, coordination number distribution and lignin particle deposition structure porosity are rolling friction coefficients and surface energy among lignin particles; the rolling friction coefficient and the surface energy between the lignin particles and the ceramic membrane have little influence on the ceramic membrane; the influence of the rolling friction coefficient among lignin particles and the surface energy parameters on the deposition morphology, coordination number and porosity of the lignin particles is comprehensively considered, calibration work of the rolling friction coefficient and the surface energy parameters is completed, and a powerful tool and accurate simulation parameters are provided for subsequent research of a membrane pollution mechanism.

The invention relates to the technical field of high polymer material processing, in particular to a blow molding method of a composite toughened film, which comprises the following steps: step 1, preheating matrix resin in preheating equipment; 2, feeding the mixed raw materials into a double-screw extruder for melt blending; 3, feeding the dried composite particles into a hopper of a single-screw blow molding extruder; 4, adjusting the air volume and the air pressure of the cooling system according to the monitoring result; and 5, the formed film pipe is folded into a flat shape through a guide component and led out through a traction roller, the traction speed and the extrusion speed are coordinated to control the traction ratio, corona treatment is conducted on the surface of the thin film to improve the surface energy, then rolling tension is controlled for rolling, and the rolling tension is controlled according to the elasticity and thickness of the thin film to prevent excessive stretching or loosening. The uniform distribution and proper compatibility of the composite toughening component improve the toughness of the film, and maintain the strength and barrier property of the film.

The present disclosure provides an alignment method and application of a cyanobiphenyl liquid crystal composite doped with an organic donor material. The organic small molecule is doped in the host cyanobiphenyl liquid crystal, and the small molecule donor / cyanobiphenyl liquid crystal mixture is directionally induced to assemble by virtue of the large surface energy difference between the superhydrophobic structured substrate and the superhydrophilic flat substrate. The liquid crystal molecules form a uniform arrangement under the action of the liquid bridge, driving the self-assembly of the small molecule donor to be embedded in the cyanobiphenyl liquid crystal, forming a structure of electron donor-donor, enhancing the conductivity of the liquid crystal composite device, studying the influence of the surface tension of the solvent on the performance of the composite, and giving a direction for the selection of the solvent. Compared with the methods of inducing the alignment of liquid crystal molecules and donor small molecules by using electric fields, magnetic fields, photolithography, capillary methods, etc., this method is simpler and more feasible, easy to transfer, the circuit pattern is easy to design, and has good stability.

The invention discloses a cement-based surface super-hydrophobic coating as well as a preparation method and a use method thereof. The cement-based surface super-hydrophobic coating comprises a prime coating and a surface coating, the prime coating is a coupling agent modified fibrous clay / resin composite material, the surface coating is a coupling agent modified SiO2 / low surface energy substance modified resin composite material, the contact angle of the cement-based surface super-hydrophobic coating is 155-159 degrees, and the impact strength is 50-60 kg.cm. Fibrous clay and high-permeability alkali-resistant resin are mixed to serve as a bottom layer of the coating, silane modified SiO2 and a low-surface-energy substance modified resin material are compounded to serve as a surface layer, the surface layer is coated on the surface of a cement-based material, and a nanofiber structure of clay is combined with the high-permeability alkali-resistant resin, so that the coating is endowed with excellent toughness, adhesive force and alkali resistance; and the coating is endowed with super-hydrophobicity and wear resistance by virtue of a bulge structure formed by bonding dense SiO2 on the surface through resin.

The invention relates to a long-life room-temperature phosphorescent material and a preparation method and application thereof.According to the phosphorescent material, epoxy resin is doped with an epoxy prepolymer containing a fluorine-containing chain segment to serve as a host matrix, F-pi and pi-pi non-covalent synergistic interaction is formed between the host matrix and aromatic fluorescent guest molecules, the energy level difference of the excited state is adjusted, and the phosphorescent material is obtained. Intersystem crossing (ISC) and radiative transition rates are optimized, so that the phosphorescence lifetime and environmental adaptability are improved; a fluorine-containing chain segment introduced into a polymer system can be enriched on the surface of a material to form a needle-shaped structure, so that the surface energy of the material is remarkably reduced, the antifouling property is excellent, and additional functions of lyophobicity, transparency, chemical stability and the like are also realized while ultra-long room-temperature phosphorescence is realized; and cooperative enhancement and multifunctional integration of optical performance and surface performance are realized.

The invention discloses vacuum coating equipment for coating an anti-fingerprint film and a coating method. The coating method comprises the following steps: performing plasma activation treatment on the surface of a glass substrate to form an activated substrate; a gradient transition layer is deposited on the surface of an activated substrate, a Cr-Si composite transition layer with continuously changing components is formed by alternately adjusting sputtering power of a metal target and a non-metal target, a fluorocarbon polymer main film layer is deposited on the transition layer substrate, and C4F8 gas is controlled by adopting a pulse magnetron sputtering process to generate an anti-fingerprint functional layer substrate with uniform thickness; stepwise in-situ annealing treatment is carried out, and a densified composite film layer structure is formed through segmented heating and heat preservation; performing plasma surface modification on the surface to form a low-surface-energy chemical group, and finishing functional treatment; through combination of a composite coating process and an intelligent control technology, cooperative regulation and control of anti-fingerprint film interface strengthening, function construction and structure optimization are realized in a single vacuum environment.

The invention relates to the technical field of biomedicine, and discloses a triclosan antibacterial coating surgical suture and a preparation method thereof.The suture comprises a base material and a surface antibacterial coating, the base material is selected from one of an absorbable single-strand material, an absorbable multi-strand material, a non-absorbable single-strand material and a non-absorbable multi-strand material, and the surface antibacterial coating is selected from one of an absorbable multi-strand material and a non-absorbable multi-strand material; the antibacterial coating comprises triclosan, a high-molecular carrier and an auxiliary agent, the surface energy of a hydrophobic material is improved, the porosity of a hydrophilic material is increased, the adhesive force between the coating and different base materials is ensured, the base materials can be covered, the uniformity deviation of the coating is avoided, and the coating is free of cracking or falling off through the combination of plasma cleaning and roughening treatment on the surface of the base materials. A synergistic system is formed by triclosan, nano-silver and titanium dioxide, a dual mechanism of targeted destruction of bacterial cell membranes and free radical oxidation is achieved, the antibacterial rate is increased, the MRSA inhibition rate is increased, the degradation rate is regulated and controlled through the polylactic acid-glycolic acid copolymer carrier molecular weight and the lactic acid / glycolic acid proportion, and a curing dynamic formula is combined.

The invention discloses a method for preparing a super-hydrophobic antibacterial fabric with a photothermal effect. The method first loads a photothermal preparation on the surface of the fabric to impart photothermal properties, and then introduces a composite coating formed by hydrophobic silica nanoparticles and a silane coupling agent with an alkane chain to reduce the surface energy of the material and construct a micro-nanoscale rough structure, thereby preparing an antibacterial fabric with excellent photothermal and super-hydrophobic properties. The super-hydrophobic antibacterial fabric prepared by the invention has a fabric surface water contact angle of 158° and a surface temperature of 120°C under near-infrared light irradiation, showing excellent photothermal cycle stability and super-hydrophobic high temperature resistance. The super-hydrophobic antibacterial fabric has an antibacterial rate of over 99.0% under the synergistic effect of passive super-hydrophobic antibacterial adhesion and active photothermal sterilization, and has a wide antibacterial range and a long antibacterial life.

The invention relates to the technical field of material surface engineering, and discloses a plastic surface treatment process to solve the problems that in the prior art, a plastic surface coating is poor in adhesive force and single in function, and a traditional treatment method is not environmentally friendly. The process sequentially comprises the following steps: pre-treating a base material, and obtaining a clean and stress-free base material through ultrasonic cleaning and thermodynamic stress elimination; performing low-temperature plasma surface activation, performing physical bombardment and chemical modification on the plastic surface by utilizing plasma of specific process gas in a vacuum environment, introducing a large number of active functional groups, and remarkably improving the surface energy; and preparing and applying the functional nano coating, namely forming firm covalent bonds by using the coupling agent in a coating solution containing functional nano particles and a coupling agent and the anchor points, so that the chemical coupling of the functional coating and the plastic substrate is realized.

The present invention discloses a preparation method of a photothermal super-hydrophobic coating with excellent anti-icing / de-icing performance under a low temperature and high relative humidity environment, first by in situ growth of photothermal Cu-MOF nanoparticles on the surface of low thermal conductivity fibrous clay mineral nanoparticles, constructing a two-level nano- / nano-structured composite photothermal particle, which is then subjected to low surface energy modification and introduced into a low thermal conductivity binder, and a binder is induced to phase separate to form a micron-scale binder / low surface energy nanoparticle aggregate by a non-solvent, and finally a photothermal super-hydrophobic coating with a three-level micro- / nano- / nano-structure is constructed by spraying. The three-level micro- / nano- / nano-structure of the coating simultaneously gives the coating excellent photothermal performance and the Cassie-Baxter state stability of the droplet on the coating surface under a low temperature and high relative humidity environment, so that it has excellent passive anti-icing / frosting and active de-icing / defrosting performance in this environment. The low thermal conductivity of the coating further suppresses the heat exchange between the substrate-water droplets, so that the passive anti-icing / frosting performance of the coating is further improved. In addition, the present invention has the advantages of simple preparation method and large-area preparation, laying a solid foundation for the practical application of photothermal superhydrophobic anti-icing coatings.

The invention discloses a water-based single-component super-amphiphobic refrigeration coating, a coating and a preparation method of the coating, and relates to the technical field of coatings. 20-35 parts of a second filler; 5-10 parts of a third filler; 20-35 parts of a film-forming substance, 1-9 parts of an auxiliary agent and 3-50 parts of water; the first filler comprises fluorine-containing silane modified fumed silica; the second filler comprises at least one of long-chain silane modified precipitated barium sulfate, long-chain silane modified calcium carbonate and long-chain silane modified hollow glass beads; the third filler comprises an infrared emission filler treated by an organic silicon modifier. By modifying the filler, the purposes of stable dispersion and functional synergy of low-surface-energy substances and high-proportion inorganic nano filler in a water-based system are achieved.

The invention relates to a preparation method of an environment-friendly flame-retardant aluminum nitride silica gel composite film in the field of new materials, which comprises the following steps: selecting a silane coupling agent to carry out surface modification treatment on spherical aluminum nitride according to surface energy distribution characteristics, and introducing hydrophilic groups on the surface of the spherical aluminum nitride through chemical grafting reaction; a hydrophilic group is grafted on the surface of spherical aluminum nitride by adopting a silane modification method, and the hydrophilic group is hydroxyl or carboxyl, so that the surface activity and hydrophilicity are improved; mixing the silane-modified spherical aluminum nitride with a silica gel matrix to obtain dispersity data of the mixture, and judging whether the dispersity of the filler is uniform or not and the standard deviation of particle size distribution is less than 0.5 mu m; according to the dispersity data of the mixture, the filling amount of the spherical aluminum nitride is adjusted, and the heat conduction performance, thermal expansion performance and heat resistance data of the composite material under different filling amounts are obtained, so that the heat conduction coefficient of the composite material film is larger than 18 W / (m.K), the thermal expansion coefficient is smaller than 30 ppm / DEG C, and the heat resistance temperature is higher than 200 DEG C.

The invention relates to the technical field of mine filling materials, and discloses a high-strength filling material for a mine and a preparation method, the high-strength filling material for the mine comprises 23.5-30 parts by weight of water, 50-64 parts by weight of chlorine-containing tailings, 5-16 parts by weight of pre-excited gelling slurry, and 2.5-6 parts by weight of a polyurethane cementing agent emulsion. The polyhydroxy sulfonic acid grinding aid prepared by the invention contains a plurality of hydroxyl groups and sulfonic acid groups, has stronger acting force with the surface of the slag and greater infiltration effect, and can be strongly adsorbed in microcracks on the surface of the slag after ball milling, so that the surface energy of slag particles is reduced, the dispersity of the slag particles is improved, and the specific surface area is increased; the activity of the slag powder can be stimulated to a greater extent, and the compressive strength of the filling material can be improved.

The invention discloses a halogen-free low-volatility anti-icing photo-thermal super-hydrophobic coating for the surface of a wind power blade and a preparation method thereof. The coating is prepared by compounding functionalized modified multi-walled carbon nanotubes, functionalized modified nano titanium nitride, polydimethylsiloxane / nano silicon dioxide modified epoxy resin and a curing agent. Wherein the multi-walled carbon nanotubes are subjected to amidation and dual functionalization of lauric acid and 3-aminopropyl triethoxy silane; the surface of the nano titanium nitride is uniformly modified through bionic polydopamine coating; hydroxyl-terminated polydimethylsiloxane and nano SiO are doped into an epoxy resin base material, so that the system is endowed with low surface energy and high weather-resistant binding force. After curing and film forming at room temperature for 24 hours or at 80 DEG C for 2 hours, the water contact angle is greater than or equal to 155 DEG C, the ice adhesion strength is less than or equal to 10 kPa, the photo-thermal temperature is greater than or equal to 40 DEG C, and the performance is not attenuated after 50 times of heating and cooling tests; and after 150-hour damp heat, 500-hour ultraviolet radiation, acid corrosion and abrasive paper friction, the coating does not blister or fall off. The coating disclosed by the invention is green and environment-friendly, low in curing energy consumption, high in photo-thermal temperature rise and strong in super-hydrophobic durability, and can be used for remarkably improving the long-term anti-icing capability of wind power blades in cold and high-humidity regions.

The invention relates to the technical field of intelligent sensing systems, in particular to an algorithm and system for avoiding water surface floating objects and improving monitoring precision based on radar water level monitoring, and the method comprises the following steps: collecting radar echoes, constructing spatial-temporal characteristics based on waveform asymmetry and coherent attenuation gradient, and calculating the spatial-temporal characteristics; according to the method, the central moments of the front edge and the rear edge of the echo are calculated, the waveform asymmetry is quantified, the dynamic stability is analyzed in combination with the attenuation gradient of the multi-time-lag coherence coefficient, the floating object interference is recognized from the double dimensions of the spatial form and the time memorability, and the actual water level is inverted. An effective scattering trailing interval is positioned, nonlinear approximation operation is performed on trailing data in combination with an index physical model, a shielded water surface energy distribution curve is reconstructed, a derivative zero point is solved, distance measurement deviation caused by floating objects is corrected, the real water level height is effectively restored, and the monitoring anti-interference capability and the data accuracy in a complex hydrological environment are improved.

The invention relates to a method for constructing a composite super-hydrophobic coating through double bonding. The preparation method comprises the following steps: taking a clean copper sheet which is not pretreated as a substrate, dipping the copper sheet in a suspension consisting of nanoparticles and sulfydryl-containing siloxane ethanol, taking out, washing, drying, dipping in a perfluoromercaptan ethanol solution, taking out, washing, and drying to obtain the copper-based super-hydrophobic surface coating. The coating prepared by the method has excellent super-hydrophobicity, icing resistance and stability. Different from an existing conventional preparation method, the method has the advantages that pretreatment operation such as abrasive paper polishing, strong acid etching or anodic oxidation does not need to be carried out on a copper sheet, and micro-nano roughening and low-surface-energy self-assembly can be completed on the copper surface only through two-step normal-temperature dipping. The method is simple in preparation process, mild in condition, free of expensive equipment, thin in coating thickness and small in influence on electric conduction and heat conduction of the copper substrate, intrinsic performance of copper can be reserved, the electric conduction / heat conduction characteristic of the copper substrate is considered, and the method has wide application value and prospects.

According to the preparation method of the high-temperature-resistant durable super-hydrophobic powder coating, integrated powder coating particles are prepared by mixing through a tabletting-crushing-sieving technology, and finally, one end of a solid nano-material in the integrated powder coating particles is embedded into a bottom layer, and the other end of the solid nano-material protrudes out of the surface of the coating, so that a nano-fiber bridging interface strengthening structure is formed. According to the invention, the low surface energy material, the solid nano material and the thermoplastic film-forming resin are effectively combined together to construct firm and stable integrated powder coating particles, so that the overall performance is synergistically enhanced, and the protection capability of a micron-scale structure to a nano-scale structure is greatly improved; the solvent-free durable super-hydrophobic powder coating is directly prepared through electrostatic spraying, so that the technological process is simplified; the solid, solvent-free and environment-friendly super-hydrophobic powder coating is prepared, has excellent high-temperature resistance and super-hydrophobic performance, and has potential advantages in the aspect of anti-corrosion and anti-drag application of a heat distribution pipeline.

The invention discloses a water glass-based full-life super-amphiphobic radiation refrigeration block material, which is prepared from the following raw materials in parts by weight: 1.5 to 3 parts of C-F long-chain modified micro-nano particles, 0.5 to 1.5 parts of water glass-based binder, 0.1 to 0.3 part of nano silicon dioxide sol and 0.05 to 0.16 part of curing catalyst, the C-F long-chain modified micro-nano particles are obtained by sequentially carrying out silane coupling agent grafting modification and fluorosilane grafting modification on nano particles with high sunlight reflectivity and micro particles with high sunlight emissivity. The super-amphiphobic function is converted into a three-dimensional block material from a two-dimensional coating, stress distribution optimization and interface bonding energy improvement are achieved while the ultra-low surface energy characteristic is kept, the problems of optical performance degradation and the like caused by surface pollution of the radiation refrigeration material are effectively solved, the mechanical durability of the material is essentially improved, and the service life of the radiation refrigeration material is prolonged. And the radiation refrigeration system can maintain stable performance in the whole life cycle.

The invention provides an adhesive with high adhesion strength for a low-surface-energy material as well as a preparation method and application of the adhesive, and relates to the field of materials. The adhesive comprises a fluorinated hard segment and a long polymer chain soft segment with a plasticizing effect, the fluorinated hard segment monomer corresponding to the fluorinated hard segment comprises a fluorinated methacrylate monomer; the soft segment monomer corresponding to the long polymer chain soft segment with the plasticizing effect comprises a polyether methacrylate monomer. The preparation method of the adhesive comprises the following steps: mixing the fluorinated hard segment monomer, the soft segment monomer and an initiator to obtain a precursor liquid; and carrying out polymerization reaction on the degassed precursor liquid, and then carrying out vacuum drying to obtain the adhesive. The adhesive provided by the invention has excellent bonding strength, does not need to carry out surface pretreatment on materials, reduces the production cost, and provides a new idea for the development of bonding of low-surface-energy materials.

The invention relates to the technical field of rubber paint, in particular to rubber paint with good wear resistance and a preparation method thereof. The rubber paint is prepared from the following raw materials in parts by weight: 60-80 parts of chlorinated rubber, 30-50 parts of solvent, 20-40 parts of alkyd resin, 10-20 parts of polytetrafluoroethylene resin, 6-10 parts of epoxy resin, 6-10 parts of filler, 4-6 parts of additive, 2-4 parts of flatting agent, 1-3 parts of ultraviolet light absorber, 1-3 parts of dispersing agent and 1-3 parts of defoaming agent. According to the rubber paint, fluorosilane has the characteristic of low surface energy, a molecular layer with low surface energy can be formed on the surface of the rubber paint, the friction force borne by the surface of the rubber paint is small due to the low surface energy, the wear resistance of the rubber paint is improved, tetraethyl orthosilicate and ammonia water are matched to generate a hydrolytic condensation reaction, and silicon dioxide nanoparticles are generated; inorganic rigid components in the rubber paint are further increased, so that the overall hardness and wear resistance of the rubber paint are enhanced.

The invention belongs to the technical field of composite materials and radomes, and particularly relates to a layer structure of a radome body and a manufacturing method. The skin comprises a first skin layer, an interlayer, a second skin layer and a polyvinyl fluoride film layer which are sequentially arranged from top to bottom. Through collaborative design of a micro-nano composite structure and a low-surface-energy material, a self-cleaning surface skin layer with super-hydrophobicity, high wave transmission and weather resistance is constructed. Compared with a traditional fluorocarbon coating, the wave transmission rate is 60-70% and is improved by more than 25%, the signal transmission loss is remarkably reduced, and the harsh requirement for the wave transmission performance of the antenna housing is met. The cleaning cost of a traditional antenna housing can be saved by more than 80%, especially for high-altitude and complex-structure antenna housings, high-altitude operation or special equipment is not needed, and the maintenance safety risk is reduced. The replacement frequency of the radome caused by aging and abrasion of the coating can be reduced, and the overall life cycle cost of equipment is reduced.

The invention discloses a high-wear-resistance modified polypropylene material and a preparation process thereof. The material comprises the following components in parts by weight: isotactic polypropylene, a beta nucleating agent, a heterofunctional hexagonal boron nitride nanosheet, an elastomer, an antioxidant system and a surface migration accelerant, one side of the nanosheet is treated by amino silane, and the other side of the nanosheet is treated by fluorine-containing silane. The material is prepared through twin-screw melt blending granulation and injection molding, in the molding process, variable mold temperature is adopted, contact pressure is applied to the surface of a product to promote directional migration and orientation of nanosheets in a cortex area, and then annealing is conducted. The Janus structure and the surface migration accelerant cooperate to realize a fluorine-containing low-surface-energy self-lubricating surface layer with an outward surface; the beta nucleating agent induces beta crystal formation to improve toughness. The scheme has the advantages of simple process and easily available raw materials, and is suitable for polypropylene products with higher wear resistance requirements, such as automotive interiors and household appliance shells.

The disclosure relates to a method and a device for the production of an optical element from a curable material by using an additive manufacturing technology. According to the disclosure, this method comprises: A—providing a curable material; B—curing said curable material inside sliced outlines (C1) whose geometry are determined according to the geometry of said optical element, said optical element comprising at least: a first volume element (V1) and a second volume element (V2), by forming the first volume element (V1) by irradiating the curable material with at least a first curing surface energy (E1) with a first light depth penetration value within the curable material (Dp1), and forming the second volume element (V2) by irradiating the curable material with at least a second curing surface energy (E2) with a second light depth penetration value within the curable material (Dp2), wherein said second light depth penetration value within the curable material (Dp2) is different from the first light depth penetration value within the curable material (Dp1).

The invention discloses a low-temperature and low-pressure connection method for copper surface in-situ nanocrystallization, and relates to a copper connection method. The method aims at solving the technical problems that operation of current copper sintering connection is complex, an intermediate layer needs to be added for assistance, the connection strength is low, the interface welding rate is low, the connection temperature and pressure are too high, and the heat preservation time is long. The nanolayer is prepared on the surface of the copper substrate by adopting an in-situ nanocrystallization method, the nanostructure has relatively large surface energy, sintering connection can be realized at low temperature and low pressure, a high-strength joint is formed, and the method can be applied to the fields of copper connection, electronic packaging and the like. And under the condition of 125 DEG C / 10min / 5MPa, the shear strength of the obtained joint can reach 118.9 MPa without additionally adding a nano-particle sintering middle layer, and a connection structure with low connection temperature, short time, low required pressure and high mechanical stability is realized. The method is simple and effective to operate, can realize low-temperature connection of large-size samples, and has a wide application prospect.

The invention discloses a self-cleaning-radiation refrigeration-deicing integrated functional coating as well as a preparation method and application thereof, and belongs to the technical field of functional protective coatings and preparation thereof. The problems that the surface of an existing solar cell panel is prone to being covered with sand, dust and ice and snow in the application process, and the cell panel is too hot in summer are solved. The preparation method comprises the following steps: firstly, preparing an ITO heating coating by adopting a magnetron sputtering technology, pre-treating the surface of the ITO coating by using plasmas, spin-coating PDMS-SiO2 modified sol on the surface of the ITO coating after more polar groups are introduced, and carrying out curing treatment, so that the ITO heating coating has hydrophobicity and radiation refrigeration property, and in order to further reduce the surface energy of the coating, the surface of the ITO heating coating is coated with the PDMS-SiO2 modified sol. And a normal hexane solution of perfluorosilane is used for reducing the surface energy of the coating, so that the self-cleaning / radiation refrigeration / deicing integrated coating with high adhesive force and high transparency is obtained. The prepared coating is widely applied to the technical field of solar power generation and the like.