137results about How to "Excellent hydrophobic properties" patented technology

The invention discloses a method for coating micro/nano-metal powder by chemical vapor deposition, including: decomposing difluorocarbene precursor gas via a cracking pipe to generate difluorocarbene free radicals; contacting the generated difluorocarbene free radicals with micro/nano-metal powder, and due to polymerization between difluorocarbene free radicals, a compact polytetrafluoroethylene coating film is generated on the surface of micro/nano-metal powder. In allusion to disadvantages and defects of the application of micro/nano-metal powder in energy-containing materials, polytetrafluoroethylene is polymerized on the surface of metal powder by chemical vapor deposition in order to coat micro/nano-metal powder. In the invention, the ignition temperature of metal powder is effectively decreased, the ignition delay time is shortened, and the combustion speed of metal powder is improved; the surface of metal powder coated with polytetrafluoroethylene is highly hydrophobic, so that reactive metal powder can be effectively prevented from absorption of moisture and oxidation.

The invention discloses a micro-nanostructure controlled copper-based superhydrophobic surface and a preparation method and application thereof. The copper-based superhydrophobic surface comprises micro structure arrays and nanowires, wherein center spacing of the micro structure arrays is 10 to 500[mu]m, the height of each micro structure array is 5 to 500[mu]m; the nanowires have the diameter of 40 to 200nm, the length of 2 to 50[mu]m and average spacing of 0.1 to 3[mu]m; and the nanowires grow in parallel to the direction of a local normal of the copper-based superhydrophobic surface and has the ingredient being copper oxide. The copper-based superhydrophobic surface can implement liquid droplet bouncing heat exchange of water vapor condensation and can also promote classical droplet condensation so as to reinforce heat exchange. Moreover, the micro-nanostructure controlled copper-based superhydrophobic surface can also be used for the fields of self-cleaning, corrosion resistance, ice prevention, frosting resistance and the like.

The invention discloses a polymer composite material. The polymer composite material comprises a polymer matrix layer, a modification layer and a barrier function layer, wherein the modification layeris a functional material layer which is chemically grafted with the surface of the polymer matrix layer through super-thermal hydrogen treatment; the barrier function layer is a silicon rubber polymer composite coating containing graphene oxide. According to the polymer composite material disclosed by the invention, the barrier function layer adopts the composite coating of the graphene oxide anda silicon rubber polymer; a sheet-shaped and laminar barrier structure is formed in silicon rubber through a sheet-shaped structure of the graphene oxide; the structure is cooperated with a silicon rubber material to have a natural hydrophobic property, and the surface energy is extremely low, so that the composite material has a super-hydrophobic liquid barrier and waterproof effect; meanwhile,the efficient gas and liquid water barrier performance of the composite material is realized.

The invention relates to a preparation method for ZSM-5 molecular sieve membrane with high hydrophobicity, which comprises the following steps: (1) preparing a compact molecular sieve seed crystal layer; (2) putting a porous support with the molecular sieve seed crystal layer into a high pressure crystallized kettle, adding synthetic solutions, carrying out at least twice hydrothermal synthesis to promote full crosslinking growth between the molecular sieve seed crystals so as to finally form a complete molecular sieve membrane with orientation; and (3) adopting self catalysis property of heteroatom-containing ZSM-5 molecular sieve, adopting a hydrogenation deep catalytic cracking process to remove organic templates in the molecular sieve membrane under the lower temperature. The invention can effectively avoid the formation of intercrystalline defects of the molecular sieve membrane, also enables the cracked organic templates to form a single-walled carbon nano tube in the pore canal of the molecular sieve membrane, increases the hydrophobicity of the molecular sieve membrane, has mild process condition, simpler operation, lower cost and wide applicability, is not only suitable for planning production of the molecular sieve membrane, but also is benefit for the industrialization of the membrane separation technique with lower energy consumption of organic matter aqueous solution with low concentration.

The invention discloses a non-noble metal catalytic material loaded core-shell catalyst, a preparation method and an application thereof. The catalyst comprises a non-noble metal doped carbon-nitrogencarrier catalytic material and core-shell particles loaded to the surface of the carbon-nitrogen carrier catalytic material. The catalyst is the core-shell catalyst of the non-noble carbon-nitrogen carrier catalytic material loaded with noble metals, has various catalytic active sites and relatively good catalytic activity and excellent transfer attributes of substances such as electrons and gasand hydrophobicity, and is low in cost. The preparation method can be used for preparing the core-shell catalytic particles by fully using residual non-noble metals in the non-noble metal catalyst preparation process, and can save the tie, simplify the electrode preparation steps and improve the activity of the catalyst and the utilization ratio of platinum. The catalyst is characterized in that the catalyst has the advantages of being low in platinum content, high in platinum utilization ratio, low in cost, high in catalytic activity and various in catalytic active sites and the compound catalyst has the advantages of being porous and orderly, relatively good in lyophobic characteristic, good gas and electron transfer characteristic integrally and the like.

The invention discloses an aluminum powder surface self-activation method. The method includes steps: adding aluminum powder into an anhydrous solvent, mixing, and stirring to disperse uniformly to form aluminum powder dispersion liquid; dissolving organic fluoride into a solvent to form organic fluorine solution, adding the organic fluorine solution into the aluminum powder dispersion liquid by acertain rate, and stirring to volatilize the solvent in which the organic fluoride is dissolved at a certain temperature, so that organic fluoride is slowly separated out by crystallization on the aluminum powder surface to form a compact surface activation layer; centrifugally separating to remove the solvent, washing, and performing vacuum drying at 60 DEG C to obtain organic fluorine surface self-activated aluminum powder. By forming of the organic fluorine self-activation layer on the aluminum powder surface, the aluminum powder ignition temperature can be effectively lowered while ignition delay time is shortened, combustion efficiency of aluminum powder in oxidants is improved while the energy releasing rate is increased, and the organic fluorine surface activation layer is effective in aluminum powder oxidation, so that stability is improved.

The invention discloses a self-breathing direct methanol fuel cell monomer based on a porous metal fiberboard. The cell monomer comprises an anode fuel chamber, a cell working unit and a cathode open type end plate, wherein the cell working unit comprises an anode collector plate, a membrane electrode and a cathode collector plate; two sides of the membrane electrode are respectively provided with the anode collector plate and the cathode collector plate; the anode fuel chamber and the cathode open type end plate used as a cell shell are respectively arranged at the outer sides of the anode collector plate and the cathode collector plate; the middle part of the anode collector plate is provided with a porous metal fiberboard, the porous metal fiberboard is formed by sintering copper metal fibers with diameter of 20-200 mu m, the porosity is 70%-90%, the permeability is 10<-12>-10<-9>m<2>, and the average pore size is 50 mu m to 500 mu m. According to the invention, because of the adoption of the porous metal fiberboard, the methanol penetration problem can be effectively solved and effective water management is realized, thus the fuel availability of the passive self-breathing direct methanol fuel cell can be improved and the output performance of the cell can be improved.

The invention relates to the technical field of fuel cells, and provides a high-performance bipolar plate with a graphene-reinforced surface for a fuel cell and a preparation method of the high-performance bipolar plate. A titanium bipolar plate is adopted as a substrate, and by adopting magnetron sputtering apparatus and method, a nickel layer or nickel-chromium layer, a first gold layer, a first graphene layer, a second gold layer and a second graphene layer are sequentially deposited on the surface of the self-sputtered and cleaned titanium bipolar plate substrate. The nickel layer or nickel-chromium layer, the first gold layer and the second gold layer which are few in pore defects and uniform in thickness can be prepared; the binding force between the first gold layer and the titanium bipolar plate substrate is improved by using the nickel layer or nickel-chromium layer, so that the problems of reducing the total contact resistance and improving the corrosion resistance of the titanium bipolar plate in the using process are solved; oxygen around the nickel layer or nickel-chromium layer, the titanium bipolar plate substrate and a cathode can be isolated by using the gold layer, so that oxidation of the nickel layer or nickel-chromium layer and the titanium bipolar plate substrate is avoided; and by adopting the graphene layers, the surfaces of the gold layers have high hydrophobicity and the separated carbon particles in the preparation process of graphene have a good pore blocking effect.

The invention discloses a method for rapid preparation of SiO2 aerogel microspheres by an ordinary pressure drying technology, and is characterized in that the method comprises the steps: A) under stirring and in a silicic acid aqueous solution/nonpolar solvent inverse emulsion system, adding a methyl silazane modified agent, continuing stirring, allowing to stand, and forming a water-nonpolar solvent double-phase layered system; B) collecting a white precipitate deposited at the bottom of a nonpolar solvent phase, carrying out washing and ordinary pressure drying on the white precipitate, and thus obtaining an SiO2 aerogel microsphere powder. The method is characterized in that the method takes cheap water glass as raw material, is simple in preparation process and short in consumed time, can prepare the SiO2 aerogel microspheres in 5-10 hours, and is convenient for large-scale production. The SiO2 aerogel microspheres prepared by the method have quite good spherical outer shape, the particle size is controllable in a range of 5-50 [mu]m, and an internal structure is a typical nano porous structure; and the SiO2 aerogel microspheres show a good hydrophobic characteristic, and can be applied in the fields of thermal insulation, chromatographic separation, catalysis, biology drug carrying and the like.

The present invention discloses a water loosing preventing rice field eel feed and a preparation method thereof. The rice field eel feed is made of the following raw materials in parts by weight: 20-30 parts of high-gluten flour, 10-15 parts of bone meal, 70-90 parts of fresh silver carps, 20-25 parts of corn oil, 80-100 parts of soybean meal, 2-3 parts of complex enzymes, 35-50 parts of wheat bran, 2-3 parts of gelatin powder, 8-10 parts of fresh pork liver, 3-5 parts of edible salt, adsorbent and an appropriate amount of water. Specifically, the water loosing preventing rice field eel feed can wrap a thin film on the surface of the conventional feed, enables feed particles to present a longer time in the water without needs of spreading feed frequently, and can also prevent the adverse impacts on rice field eels caused by water eutrophication. The addition of pork liver enables fresh and delicious smell of the rice field eel feed, which is line with the smell of food when the rice field eels are seeking food, thus is helpful for the food intake of rice field eels.

The invention discloses a hydrophobic thermal insulation paper, comprising: a base material layer; silicon dioxide nanoporous airgel is attached to the base material layer, the base material layer adopts inorganic fiber paper, and the The silicon nanoporous airgel has a specific surface of 400g/m2-800g/m2, a density of 0.015g/cm3-0.20g/cm3, a porosity of 80%-95%, and a pore size of 30nm-100nm. In the present invention, silica airgel with a nano-network pore structure is compounded on inorganic fiber paper to form thermal insulation paper, which not only retains the original characteristics of high temperature resistance and non-combustibility, but also greatly reduces the overall thermal conductivity, significantly Improved thermal insulation properties. In addition, silica airgel has good hydrophobic properties, thus further expanding the advantages of the material, and greatly improving its application value and application range. The product of the invention has the advantages of high temperature resistance, no burning in case of fire, good hydrophobicity, low thermal conductivity, etc., and excellent thermal insulation effect.

The invention provides a photosensitive resin with excellent sensibility, thermal endurance, chemical resistance, etc., more particular, for the composition, the film has excellent hydrophobic property so as to be adapted for forming a dike groove in an ink-jetting manner and being used in flotation-removing. The photosensitive resin composition of the invention is characterised by containing: a) acrylic copolymers, b) 1, 2-quinone diazide compounds, c) fluorin compounds represented by one structure of chemical formulas 1-5, d) solvents, wherein the a) acrylic copolymers is obtained by copolymerizing i) unsaturated carboxylic acid, unsaturated carboxylic acid anhydrides or their mixtures; ii) unsaturated compounds containing epoxy group; and iii) olefin copolymers, and then removing non-reacted monomers.

The invention provides a preparation method of a super-hydrophobic diamond-like carbon film. The preparation method comprises the steps that firstly a diamond-like carbon film with double-element metal being doped jointly is prepared, and heat treatment is conducted on the diamond-like carbon film with the double-element metal being doped jointly in inert gas shielding atmosphere. On one hand, thegraphitization degree of the film can be improved through double-element metal doping and heat treatment, and the surface energy of the film can be reduced; and on the other hand, one of the doped metal is a doped metal element which has a weak bond feature by being bonded with a carbon atom, separation can happen and nanoclusters can grow under the heat treatment condition, and thus a micro-nanocomposite structure can be built on the surface of the film, so that the film has a super-hydrophobic property. The preparation method is simple, efficient, economical and environmentally friendly, and has good application value.

The invention provides a water-based coating with self-cleaning, anti-mildew, sterilization and air purification functions. The water-based coating is prepared from following components in parts by weight: 20-30 parts of organic silicon resin, 20-30 parts of a water-based fluorocarbon emulsion, 0.4-0.9 parts of a coalescing agent, 30-35 parts of water, 0.5-1 part of a dispersing agent, 0.1-0.6 parts of an antifoaming agent, 1-1.5 parts of a leveling agent, 10-15 parts of pigments, 8-14 parts of filler and 7-8 parts of an anti-mildew sterilizing agent. The water-based coating has better self-cleaning, anti-mildew, sterilization and air purification functions.

A providd suspended filling material used for sewage processing is characterized in that the filling material is integrally in the shape of a ball, the surface is provided with a modified coating, and the diameter is 10-60 mm; the filling material comprises filling-material sheets and a filling-material nucleus; each filling-material sheet is a semi-annular thin sheet, and the filling-material nucleus is a hollow ball; the filling-material sheets are arranged in the tri-dimensional space round the filling-material nucleus in a radial manner; and the filling-material sheets and the filling-material nucleus are arranged in a concentric way, and the internal diameter of each filling-material sheet is equal to the external diameter of the filling-material nucleus. The suspended filling material is easy for film formation, and because the filling-material nucleus is hollow, the filling material is easy to suspend after a film is formed.

The invention relates to a preparation method of a modified polyvinylidene fluoride-polyvinyl alcohol binary composite ultrafiltration membrane. The preparation method comprises the following steps of preparing membrane casting solution, wherein the membrane casting solution is prepared by polyvinylidene fluoride powder, polyvinyl alcohol powder, carboxylation multiwalled carbon nanotubes and dimethyl sulfoxide solvent; fully dispersing the carboxylation multiwalled carbon nanotube in the dimethyl sulfoxide solvent, then sequentially adding binary membrane materials prepared by the polyvinylidene fluoride powder and the polyvinyl alcohol powder, controlling the temperature to be 95 to 105 DEG C, mechanically stirring and dissolving, and obtaining uniform membrane casting solution; then after fully defoaming the obtained membrane casting solution at the temperature of 40 to 60 DEG C, scraping the membrane on a glass plate; immersing the glass plate with a membrane casting solution thin layer into coagulation bath with the temperature of 25 to 35 DEG C to split phases to form the membrane, taking out after soaking in deionized water for 5 to 7 days, naturally drying, and storing. According to the binary composite ultrafiltration membrane provided by the invention, the flux recovery rate can achieve 81.2 percent, and the binary composite ultrafiltration membrane has good hydrophilic and antifouling property.

The invention relates to an optical transparent adhesive, and particularly relates to modified organosilicon material-based dual-curing optical glue. The dual-curing optical glue disclosed by the invention comprises the following components by mass percent: (A) 47-97% of organosilicon polymer and silicon resin grafted or blocked by (methyl) acrylic acid allyl ester and vinylsilane, (B) 0-50% of (methyl) acrylic ester active monomer, (C) 0.5-3% of photoinitiator, and (D) 0-0.5% of metallo-organic compound catalyst. The dual-curing optical glue can be applied to a display screen, a touch screen and an optical device, and has the advantages of high light transmissivity, ultraviolet resistance, ageing resistance, high temperature resistance, good low-temperature flexibility, low cure shrinkage rate, self-leveling foam discharging property, good hydrophobic properties, strong binding power on glass, small fitting thickness and the like.

The invention relates to a method for processing a microelectrode on a PDMS substrate based on an inkjet printing technology. The method comprises: preparing a PDMS substrate, wherein a PDMS monomer and a curing agent are uniformly mixed according to a mass ratio of 10:1, gas bubbles are removed, the PDMS mixed with the curing agent is poured onto the surface of a polished silicon wafer, and the obtained material is placed into a constant temperature oven for 2 h to cure; increasing adhesion of the PDMS on the metal electrode; and carrying out splitting and re-combination on the effective pixel part in the original electrode pattern by using a digital image treatment method, and then carrying out spray printing in a one-by-one manner according to the effective pixel in the new pattern. According to the present invention, the problem of poor electrode continuity caused by the surface tension of the liquid droplet is overcome, the hydrophobic property of the PDMS surface is improved, the processing efficiency is improved, and the poor adhesion of the silver electrode on the PDMS surface is solved; and the method has characteristics of high efficiency, convenience and high automation degree, and the processed electrode has characteristics of good PDMS surface adhesion and high quality.

The invention discloses a polysiloxane block polymer and an application thereof. The polysiloxane block polymer is prepared by the following steps: (1) uniformly mixing 2,4,6-trivinyl-2,4,6-trimethylcyclotrisiloxane and hexamethylcyclotrisiloxane, then dissolving the mixture in a first solvent, adding a first initiator for reacting, adding a capping agent for reacting and capping to obtain vinyl polysiloxane; and (2) uniformly mixing the vinyl polysiloxane obtained in the step (1) with a sulfhydryl monomer, a second solvent and a second initiator and performing ultraviolet light irradiation for reacting, or uniformly mixing the vinyl polysiloxane obtained in the step (1) with a hydrosilyl monomer and a catalyst for reacting to obtain the polysiloxane block polymer containing SR<1> groups or R<2> group. According to the invention, through the characteristic of high flexibility of polysiloxane molecular chain segments and the characteristic that the coupling agent tends to an inorganic material after curing and crosslinking, a protective coating with good toughness, high hardness and hydrophobic and self-cleaning characteristics is prepared.

The invention provides a light-masking hydrophilic fiber and a preparation method thereof. The preparation method comprises the following steps: A1, dividing inorganic light-masking powder into a first part and a second part, blending the first part of powder, aromatic dibasic acid and aliphatic diol into mixed slurry, and performing esterification reaction on the mixed slurry, so as to form a pre-reaction melt; A2, adding aliphatic polyamide into the pre-reaction melt, performing polycondensation reaction, and cooling, so as to form a modified polyester material; A3, coating the surface of the second part of powder with a resin coating, so as to form composite master batch; A4, blending and melting the modified polyester material and the composite master batch, so as to obtain a hydrophilic group modified polyester melt containing the inorganic light-masking powder; A5, spinning and drafting the hydrophilic group modified polyester melt containing the inorganic light-masking powder, so as to obtain the light-masking hydrophilic fiber. The fiber prepared by the preparation method has good internal reflection light absorption effect, and high refractive index and hydrophilicity, and the prepared textiles have good visual masking effect and good skin adaptability.

The invention belongs to the field of nylon engineering plastics, and particularly relates to a whisker-reinforced hydrophobic nylon 66 composite material and a preparation method thereof. According to the invention, polytetrafluoroethylene with hydrophobicity is firmly attached to the surface of a calcium sulfate whisker, and a formed material is used as a filter and dispersed into nylon 66; thehydrophobicity of the polytetrafluoroethylene endows the nylon 66 with a good hydrophobic effect; meanwhile, the polytetrafluoroethylene firmly coats the surface of the calcium sulfate whisker and realizes network dispersion in virtue of the fiber characteristics of the calcium sulfate whiskers, so the problem of separation of the polytetrafluoroethylene is avoided; and the strength of the nylon 66 can be effectively improved by the calcium sulfate whisker. Furthermore, a hydrophobic aid is added into a nylon 66 system, so the material has excellent water and oil repellent characteristics, andnylon 66 can easily form hydrogen bonds after the material is used for nylon 66; and thus, carbonyl and amido groups in nylon 66 can be occupied in advance, thereby preventing water molecules from entering.

The invention discloses a preparation method of an adjustable solid-state fluorescent carbon dot for an LED (light-emitting diode). The carbon dot is an anhydride-terminated carbon dot and has bright fluorescence in a solid state. The preparation method comprises the following steps: (1) preparing a carbon dot precursor solution: dispersing dithiosalicylic acid in a saturated acetic acid solution, and conducting ultrasonic dispersing uniformly; (2) preparing carbon dots: transferring the carbon dot precursor solution into a reaction kettle, conducting heating for reaction, conducting cooling to room temperature, conducting purifying, and conducting freeze-drying to obtain carbon dot powder; and (3) building an LED: fully mixing the carbon dot powder with polystyrene dissolved in toluene to obtain uniform mixed slurry, and coating an ultraviolet LED lamp bead with the mixed slurry, and conducting curing to obtain the carbon dot LED. The method disclosed by the invention is simple to operate and low in difficulty of an operation process, innovation is made on the basis of traditional carbon dot purification, the problem of fluorescence quenching of the carbon dots in a solid state is solved, and the carbon dots with good luminescence in the solid state are obtained.

The invention discloses an anti-icing coating for a low-temperature and high-humidity environment. The anti-icing coating comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 45-65wt% of polyurethane resin, 10-20wt% of a functional porous nano material, 17-25wt% of a wear-resistant filler, 10-15wt% of a solvent and 2-3wt% of an assistant; the component B is an isocyanate curing agent; and the mass ratio of the component A to the component B is (5-5.5): 1. The preparation method comprises the following steps of preparing the functional porous nano material, and uniformly stirring the elastic polyurethane resin, the auxiliary agent, the solvent accounting for 70% of the total amount and the functional porous nano material at a low speed, adding the wear-resistant filler, and uniformly stirring at high speed, after uniformly stirring, grinding for 0.5-4 hours, and finally adding the residual solvent to adjust the viscosity, so as to obtain the component A, and before use, mixing the component A and the component B, uniform stirring and acquiring the anti-icing coating. The coating is good in film-forming propertyand compact in structure, the surface of a coating layer has low icing temperature and good hydrophobic property, and the coating has good anti-icing property in a low-temperature and high-humidity environment.