13results about How to "Increase contact angle" patented technology

The application discloses a method for preparing a conjugated Schiff base in situ on cotton fabric and application thereof, and utilizes sodium periodate to oxidize cotton fabric to obtain aldehyde fiber, and then forms a loaded conjugated Schiff base cotton fabric in situ on the aldehyde fiber through a p-phenylenediamine and glyoxal polycondensation reaction, tests the UPF, tensile breaking strength, crease recovery angle and contact angle of the cotton fabric before and after finishing to represent changes in ultraviolet resistance, tensile property, crease recovery and hydrophilicity of the cotton fabric. + The in-situ grafting process of the cotton fabric has a smaller influence on the strength of the cotton fabric, and the crease recovery angle and the contact angle of the finished cotton fabric are obviously increased.

The application discloses a spherical aluminum nitride silicon grease high-thermal-conductivity interface material composition and belongs to the technical field of thermal-conductivity interface materials.The spherical aluminum nitride silicon grease high-thermal-conductivity interface material composition comprises, in terms of weight parts, 50-80 parts of spherical aluminum nitride and 50-100 parts of modified silicon oil, the modified silicon oil is silicon oil grafted with adamantane molecules and fluorine-containing alkyl groups on the side chain, and the spherical aluminum nitride is prepared by using aluminum powder with low, medium and high particle sizes, wherein the spherical structure guarantees the fluidity of the silicon grease, the introduction of the adamantane molecules and the perfluoroalkyl molecules improves the heat resistance of the silicon oil and reduces the migration rate of the silicon oil, different particle sizes of the spherical aluminum nitride are used in combination for compounding, the filler with a smaller particle size can fill the gaps between the fillers with a larger particle size, a more perfect thermal-conductivity channel is constructed, the gap rate between the filler particles is greatly reduced, and the thermal-conductivity performance of the material is improved.

The invention relates to the technical field of high polymer materials, and discloses a polyester release master batch as well as a preparation method and application thereof. According to the release master batch, polyester resin is used as a matrix, specific modified organic silicon resin is introduced, and the organic silicon resin is prepared from polydimethylsiloxane containing silicon-hydrogen bonds, multiple hydrogen bond unit monomers containing unsaturated double bonds and fluorine-containing chain segment monomers through a hydrogen-silicon addition reaction. Multiple hydrogen bond groups and fluorine-containing alkyl chain segments are introduced to the same molecular chain at the same time, so that the resin is endowed with temperature responsiveness, excellent dispersity in a polyester matrix and ultralow surface energy after film formation. The polyester release master batch is prepared by adopting a melt blending extrusion process, and then the polyester release master batch and the polyester resin are blended and stretched to prepare the release film, so that the release film has stable and adjustable release force and excellent fingerprint resistance and pollution resistance, keeps good transparency and dimensional stability, and is suitable for the fields of electronic packaging, optical protection films, die cutting materials and the like.

This invention belongs to the field of functional textile materials and interface wettability control technology, and discloses a method for preparing cotton fabric with underwater superoleophobic and oil-water superhydrophobic properties and its application in oil-water separation. The method first dissolves nano-titanium dioxide and n-octanol in ethanol to obtain an alcohol phase mixture; then dissolves dopamine hydrochloride and Tris-HCl in deionized water to obtain an aqueous phase mixture; the two phases are mixed and the pH is adjusted to 8.0–8.5, allowing dopamine to oxidize and self-polymerize, forming a composite coating system synergistically with n-octanol, nano-titanium dioxide, and polydopamine; the cotton fabric is then impregnated and dried at 75–85°C for 2–4 h to obtain a cotton fabric with a surface polydopamine / n-octanol / nano-titanium dioxide composite coating. This fabric exhibits superhydrophilicity and oleophilicity in air, with underwater oil contact angles and oil-water contact angles both greater than 155°. Washing with ethanol, drying, and re-pre-wetting allow for reversible switching between the two superwetting properties. It can be used for the efficient separation of oil-water mixtures and oil-in-water and water-in-oil emulsions under gravity.

The utility model relates to the technical field of trademark printing equipment, in particular to a scraper pressing mechanism and trademark printing equipment, which comprise a scraper, a first pressing cylinder, a cross beam and swing arms, two ends of the scraper are movably connected with two ends of the cross beam through the swing arms, and the cross beam is movably connected with the first pressing cylinder through a connecting top plate and a flexible connecting column. The two ends of the swing arm are movably connected with the cross beam and the scraping plate correspondingly, when the scraping plate is just in contact with the printing supporting plate, the scraping plate can be swung through the swing arm, the contact angle of the scraping plate is increased, the defect of non-uniform ink coverage is overcome, meanwhile, the flexible connecting column can adjust the contact pressure between the scraping plate and the printing supporting plate, and the printing efficiency is improved. The scraping plate pressing mechanism can adapt to materials without hard surfaces, and trademarks can be clearly printed on the materials.

The invention discloses a hydrophobic additive based on silane modified zinc oxide as well as a preparation method and application of the hydrophobic additive. According to the additive, zinc oxide whiskers with a three-dimensional tetrapod-like structure are used as a matrix, and tetraethyl orthosilicate and hexadecyl trimethoxy silane are subjected to hydrolytic polymerization on the surface of the matrix to form a super-hydrophobic structure. The hydrophobic additive is simply mixed with traditional explosion suppression powder (such as sodium bicarbonate) which is easy to absorb moisture in proportion, so that the hydrophobicity and the anti-blocking capability of the composite powder can be remarkably improved. The process is simple, safe and environmentally friendly, the key problem that the performance of the explosion suppressant is degraded in a high-humidity environment is effectively solved, and a novel efficient material is provided for industrial dust explosion protection.

The utility model discloses a waterproof type vehicle -mounted sensor shell, and the device includes: sensor shell main part, one end of sensor shell main part is equipped with sealed end, one end of sealed end is equipped with cable waterproof cover, the surface of sensor shell main part is equipped with a plurality of first inclined groove and second inclined groove, first inclined groove and second inclined groove are symmetrical and even winding on the surface of sensor shell main part, and sensor shell main part includes base layer and anti -permeation layer. The utility model has the advantages of: the first inclined groove and second inclined groove of symmetrical winding of sensor shell main part surface, cooperate 55 and 125's angle of inclination, can change the water flow direction fast, make rainwater, mud water and so on liquid follow the inclined groove and slide down rapidly, compared with traditional smooth plane shell, and the retention time of moisture on the surface is shortened by more than 80%, effectively reduces the probability that liquid infiltrates the seam and cable interface, reduces the risk that sensor loses the effect because of water.

The application relates to the technical field of building materials, and particularly discloses a kind of nanometer materials for wall cable trench cavity water stop and a preparation method thereof, which comprises the following raw materials in parts by weight: sebacic acid 5-10 parts, acrylic acid 50-70 parts, olivine powder 10-20 parts, magnesium aluminum silicate 10-20 parts, calcium acrylate 20-30 parts, aluminate coupling agent 1-2 parts, curing agent 1-2 parts, coagulant 1-2 parts, water reducing agent 1-2 parts, modified additive 1-2 parts, deionized water 30-40 parts, ammonium persulfate 0.5-1 part. The modified additive has phosphorus, silicon, fluorine elements and long-chain alkyl on the molecular structure, and the modified additive and other raw materials significantly improve the flame retardance, compressive strength, chemical stability and waterproof performance of the nanometer material for wall cable trench cavity water stop through synergistic effect. Meanwhile, the modified additive also reduces the agglomeration phenomenon among raw materials, ensuring that the nanometer material has good strength and water plugging effect.

The self-cleaning road marking paint is composed of A component and B component, wherein the A component is composed of 50-150 mass parts of modified acrylic resin, 0.1-2 mass parts of accelerator, 1-10 mass parts of inert oil and 10-50 mass parts of low-boiling and low-surface tension solvent; the B component is composed of 50-150 mass parts of modified acrylic resin, 1-10 mass parts of curing agent, 1-10 mass parts of inert oil and 10-50 mass parts of low-boiling and low-surface tension solvent; the modified acrylic resin is a mixture obtained by dissolving solid acrylic resin with active monomers of methyl methacrylate, butyl acrylate and hydroxypropyl methacrylate as dispersion medium, adding inorganic filler and nano titanium dioxide, and modifying the inorganic filler and nano titanium dioxide with silane coupling agent. The paint can realize long-term self-cleaning effect of road marking without increasing the smoothness of the surface of the road marking.

The application relates to the technical field of modified plastics, and particularly discloses a polystyrene composition, a preparation method and application thereof. The polystyrene composition comprises the following components in parts by weight: polystyrene 60-80 parts, a toughening agent 10-25 parts, a self-cleaning agent 2-30 parts, a hydrophobic agent 0.1-0.5 parts, a hydrophobic synergist 2-10 parts and a lubricant 0.1-1 part; the self-cleaning agent is polyethylene; and the hydrophobic synergist is a two-dimensional sheet-shaped inorganic material. The four, namely the self-cleaning agent, the hydrophobic agent with the function of reducing the surface energy of the material, the hydrophobic synergist and the lubricant, are mutually synergistic, so that the contact angle of the polystyrene composition is increased, the polystyrene composition has excellent self-cleaning performance and hydrophobic performance, and oil stains are difficult to remain on the surface. In actual application, the polystyrene composition has good waterproof and dirt-proof performance, and can maintain a good appearance for a long time in use.

An electronic paper structure and a manufacturing method thereof, the electronic paper structure comprising a first electrode layer, a composite insulating layer and ink; the composite insulating layer is stacked on the first electrode layer, and the composite insulating layer comprises an insulating layer and a plurality of deformation structures; the insulating layer comprises a first surface facing away from the first electrode layer, and the first surface is concavely provided with a plurality of grooves; the plurality of deformation structures are one-to-one correspondingly accommodated in the plurality of grooves; the ink is arranged on the composite insulating layer; and in the case that the first electrode layer is electrified, the deformation structures expand and deform and extend out of the first surface. The electronic paper structure can solve the aggregation phenomenon of the ink in the shrinkage process.

The application provides a preparation method of nanocellulose-based composite thermal insulation material and application thereof. The method first prepares a GO-NC-Ce hybrid dispersion liquid through ultrasonic-assisted self-assembly; then, a flexible polymer is used as a matrix, carbon nanotubes, pre-dispersed aerogel particles, phase change microcapsules, a phase change energy storage framework and a composite foaming system are added, and a multifunctional composite slurry is prepared through high-speed shearing and vacuum degassing; subsequently, a gradient ice crystal template is formed through a freeze-drying technology by controlling a freezing rate, and a foaming body with a gradient pore structure of a bottom layer, a main body layer and a surface layer is obtained after sublimation of the ice crystal; finally, a surface layer slurry containing sepiolite fibers, nanometer titanium dioxide and a hydrophobic agent is sprayed on the surface of the foaming body and solidified to obtain the composite thermal insulation material. The obtained material has controllable porosity and excellent heat insulation performance, and is suitable for the field of wearable textile thermal insulation.

The present application relates to the field of multi-form clamping jaw, specifically to a stack clamping jaw capable of adapting to multi-form goods, comprising an L-shaped clamping jaw, one end surface of the L-shaped clamping jaw is provided with a triangular inclined groove, a hollow groove one is opened in the top inner side wall surface of the L-shaped clamping jaw, a swing arm plate is swing-connected to the top inner side wall surface of the hollow groove one, a triangular pad is fixedly connected to the bottom surface of the swing arm plate, and a motor is fixedly installed to the inner side wall surface of the hollow groove one. The motor is matched to rotate the threaded rod, so that the trapezoidal slide block moves in the direction of the triangular inclined groove on the surface of the threaded rod, and the triangular pad on the bottom surface of the swing arm plate is pushed by the trapezoidal slide block, the inclined surface of the triangular pad is in contact with the inclined surface of the top surface of the trapezoidal slide block, and when the trapezoidal slide block continuously slides, the swing arm plate is upwardly jacked and tilted.