958 results about "Water contact" patented technology

The present invention relates to an article having at least one surface, wherein said surface is at least partially coated with a ultra high hydrophobic film having a surface roughness such that the film exhibits a static water contact angle at least equal to 115°, preferably 120°, even better 125°, and wherein said film is a nanostructured film comprising a first layer comprising nanoparticles bound by at least one binder adhering to the surface of the article, and a second layer of an anti-fouling top coat at least partially coating said first layer. The present invention also concerns a process for preparing the above article.

Atomization of a high boiling point, hot liquid, such as a hydrocarbon feed oil for a fluid cat cracker, is enhanced by injecting subcooled water into the hot liquid, to form a two-phase fluid of the liquid and steam, upstream of the atomization. The hot liquid is at conditions of temperature and pressure effective for the injected, subcooled water to vaporize into steam, when the water contacts it. Typically this means that the hot liquid is hotter and at a lower pressure than the water. In an FCC process, the subcooled water is sparged into the flowing hot oil in a conduit in a riser feed injector. This produces a spray of hot oil in the riser reaction zone in which the oil drops are smaller and more uniformly distributed in the spray.

The present invention relates to an exothermic device for topically delivering an active agent comprising a liquid reservoir comprising water, a heating element comprising an oxidizable material, an oxygen-permeable outer-layer, an active agent, and a water-impermeable layer, wherein upon the rupturing of the liquid reservoir, the water contacts the heating element and the oxygen to create and exothermic reaction.

On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents. These cleaning and disinfecting methods work in a variety of industrial water systems including cooling water and boiler water systems.

The invention discloses preparation of a super-hydrophobic ice-covering-proof coating having a slowly-releasing function. The ice-covering-proof coating consists of the following substances in parts by mass: 1.5-5 parts of inorganic hollow or porous nanoparticles for adsorbing small molecular anti-icing substances, 2-5 parts of fluorine-containing polymer and 1-15 parts of solvent. The super-hydrophobic ice-covering-proof coating having the slowly-releasing function can be obtained by uniformly mixing the three substances and coating the mixture onto the surface of a substrate. At the normal temperature, the water contact angle of the coating is greater than 150 degrees, and the rolling angle is smaller than 7 degrees. At 10 DEG C below zero, the low-temperature contact angle of water is greater than 140 degrees, and the rolling angle is smaller than 12 degrees. During testing of the ice cover at 10 DEG C below zero, the ice cover is lowered by over 70 percent, and is still higher than 50 percent after testing is performed circularly for ten times in comparison to a blank sample.

An extended release dosage composition of pharmaceutically active substances that have a water contact angle (θ) such that cos θ is between +0.9848 and −0.9848 presented as a matrix tablet containing the said pharmaceutically active substances, with/without suitable pharmaceutical excipients in intimate mixture with two groups of intelligent polymers having opposing wettability characteristics, one demonstrating a stronger tendency towards hydrophobicity and the other a stronger tendency towards hydrophilicity, the polymer combination being between the ratios of 1:50 and 50:1 amounts effective to control the release of said pharmaceutically active substances in a mathematically predictable manner, wherein the polymer demonstrating a stronger tendency towards hydrophobicity is not less than 5% wt/wt and preferably between 5-70% wt/wt of the final formulation composition. The intelligent polymers being ethylcellulose (EC) as a more strongly hydrophobic and hydroxyethylcellulose (HEC) and/or hydroxypropyl methylcellulose (HPMC) as more strongly hydrophilic (the ratio of HEC to HPMC being between 1:100 and 100:1). The matrix tablet is optionally coated with an enteric coat, 0-5%-15% wt/wt to prevent the initial burst effect seen in such systems and to impart gastrointestinal tract (GIT) “stealth” characteristics especially in the presence of food.

The disclosure relates to a superhydrophobic surface. Methods of fabrication are disclosed including laminating a polymer sheet having a surface to a template having a textured surface or a layer of a nanomaterial (e.g., nanoparticles or nanofibers) to convert the surface of the polymer sheet to a hydrophobic surface having a water contact angle of at least about 150°.

Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations are diagnostic of the direction of beds relative to the position of the borehole. When the logging instrument is conveyed on a drilling assembly, the drilling trajectory may be maintained to follow a predetermined trajectory or to maintain a desired distance from a boundary such as an oil-water contact.

The device and the method for forming steam are used for household appliance. Principle: water enters into the heated spiral tube chamber through the inner end of the spiral tube chamber; water contacts the side wall of the spiral tube chamber, and is vaporized, then diffused along the spiral tube chamber; part of the water droplets diffuses with vapor, and contacts the side wall of the spiral tube chamber gradually, then is vaporized; vapor is obtained from the outer end of the spiral tube chamber. In one word, the invention provides a method to obtain “dry” steam which doesn't contain water. It is more efficient than other facilities.

A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow, a plug wrap surrounding the filter element, and either a coating or a pill in contact with the tow. The coating and/or pill may be composed of a material adapted to catalyze hydrolysis of the cellulose acetate tow and a water-soluble matrix material. The material may be an acid, an acid salt, a base, and/or a bacterium adapted to generate an acid. The coating may be applied to the tow, the plug wrap, or both. The pill may be placed in the filter element. When water contacts the water-soluble matrix material, the material adapted to catalyze hydrolysis is released and catalyzes the hydrolysis, and subsequent degradation, of the cellulose acetate tow. The foregoing is also applicable to articles made of cellulose esters.

A system for removal of Hydrogen Sulfide (H₂S) and/or Carbon Dioxide (CO₂) from natural gas via absorption and disassociation utilizing a sea water contact system. In the preferred embodiment of the present invention, a series of counter current scrubber stages is provided, each configured to remove via absorption/disassociation a portion of the impurities, each stage having less pressure than the predecessor, each stage redirecting the purified gas to the preceding stage, until the contaminant level in the hydrocarbon gas stream has been reduced to an acceptable level. The hydrogen sulfide/carbon dioxide contaminants are thereby sequestered in the sea water utilized in the scrubber, which sea water may be further processed and/or re-introduced into the deep of a body of water, where the contaminants will remain isolated for hundreds of years. The present invention further contemplates and energy recovery system for greatly enhancing the efficiency of the system. Accordingly, the present invention provides an efficient and cost effective method for the purification of natural gas on an offshore platform.

An air cleaner for removing air pollutants by a water spray type of dust collecting system, which includes a dust collecting part and an air and water separating part in the interior of an air duct, the dust collecting part composed of primary and secondary dust collectors by water spraying, each of which having a plurality of spraying nozzles layeredly arranged by predetermined intervals to be opposed at an angle of 30° from the top to bottom thereof, and a space dust collector by water spraying disposed in a space between the primary and secondary dust collectors by water spraying, such that the three-step air and water contact causes foreign materials such as dust, gases and so on to be absorbed, dissolved and settled, and the air and water separating part formed of a groove-engaged type and layeredly curved by six-step folding at an angle of 90° in consideration of air resistance, for passing only the air flowing from the dust collecting part and collecting water drops.

A water alarm device for releaseable attachment to a user in a body of water includes a buoyant alarm unit having a water sensor. The water sensor is configured to sense if a sensing portion of the alarm unit is in contact with water. A release unit is configured to releasably attach the alarm unit to the user. A timer is in communication with the water sensor and is configured to determine a duration of water contact with the sensing portion of the alarm unit. The release unit is configured to release the alarm unit from the user when the duration of water contact is greater than a predetermined time, and the alarm unit is configured to travel to a surface of the body of water and activate an alarm when the alarm unit is released from the user.

The invention discloses super-hydrophobic surface coating material and a preparation method thereof. The super-hydrophobic surface coating material is characterized in that super-hydrophobic poly-alkyl siloxane material in stratiform crystal structure is self-assembled and formed on backing material; the water contact angle of the surface of the super-hydrophobic surface material ranges from 120 degrees to 180 degrees, and the roll angle ranges from 1 degree to 30 degrees. The preparation method comprises the steps of pretreating the backing material; coating solution containing long carbon-chain alkyl silane on the surface of the backing layer by the coating method, thermally treating the coating surface or directly exposing the coating surface to air after treating the surface of the coating with a reagent, and self-assembling and forming the super-hydrophobic poly-alkyl silicone material. The invention adopts the coating method for preparing super-hydrophobic films and overwhelms a plurality of defects of the prior art for preparing super-hydrophobic films with simple modes to manufacture the films.

The invention discloses a super-hydrophobic acrylic polyurethane coating and a preparation method thereof, and belongs to the technical field of chemical materials. The super-hydrophobic acrylic polyurethane coating is prepared from the following raw materials in parts by weight: 5-10 parts of modified hydrophobic particles, 15-30 parts of hydroxyl acrylic resin, 0-1 part of a leveling agent, 0-1 part of a dispersant, 4-13 parts of a curing agent and 45-75 parts of a solvent by virtue of spray coating and curing. The water contact angle of the super-hydrophobic acrylic polyurethane coating disclosed by the invention can be as high as 160 degrees, the roll angle is less than 10 degrees, a water drop falling on the coating tumbles off extremely easily, the adhesive force of the coating can reach a 0 level, and the coating is marvelous in flexibility and impact resistance. The preparation method of the coating disclosed by the invention is simple and feasible, the used raw materials are convenient and easy to obtain, the process condition is easy to realize industrial large-scale production, and the super-hydrophobic acrylic polyurethane coating has a broad application prospect.

The invention discloses a super weather-resisting, wear-resisting and anti-icing wind-powered blade coating and a preparation method thereof. A component A comprises the following compositions in percentage by mass: 27-44% of fluorocarbon resin, 10-25% of polyester resins, 0.5-2% of a silane coupling agent, 0.5-2% of a wetting dispersant, 0.5-2% of a thixotropic agent, 1-5% of nano titanium dioxide, 3-6% of nano alumina, 12-18% of a pigment, 5-10% of packing, 3-6% of extinction powder, 0.1-1% of an ultraviolet light absorber, 0.1-0.8% of a flatting agent, 0.01-0.4% of a defoaming agent and 5-10% of a diluent; and the component A and aliphatic isocyanate are proportioned according to a formula that -NCO/-OH = 1.05-1.2. The coating disclosed by the invention is outstanding in weather resistance and wear resistance, and can carry out long-acting protection on wind-powered blades and save the maintenance cost; the water contact angle is greater than or equal to 150 degrees, and the ice cover can be reduced by more than 50%; and the surface dry is implemented in 0.5 h, the hard dry is implemented in 24 h, and the coating can be subjected to brush coating, roll coating and spray coating, therefore, the coating is high in construction efficiency.

A formation pressure testing while drilling device on a bottomhole assembly makes measurements of fluid pressure during drilling of a borehole. Based on the pressure measurements, drilling direction can be altered to maintain the wellbore in a desired relation to a fluid contact. Acoustic transmitters and/or receivers on the bottomhole assembly can provide additional information about bed boundaries, faults and gas-water contacts.

The invention discloses a super-hydrophobic film with a composite structure, which comprises a film matrix, an adhesive layer and a super-hydrophobic layer. The adhesive layer is adhered to the film matrix; and the super-hydrophobic layer consists of micro-scale powder particles and nano-scale powder particles which are arranged at intervals and embedded into the film matrix, have low surface energy or are modified by low surface energy substances, and micro-scale protrusions and nano-scale protrusions are formed on the surface of the adhesive layer. The super-hydrophobic film has the advantages of simple structure, easy preparation and lower cost; a water contact angle of the super-hydrophobic layer is between150 and 165 degrees, and a roll angle is less than 5 degrees; the super-hydrophobic film is provided with the adhesive layer and has no special requirement on a matrix material; and a super-hydrophobic structure can be arranged on the matrix with higher hardness; the super-hydrophobic film self has certain strength and hardness and excellent mechanical property, can be used in the occasions with higher mechanical requirements, and can also be used in the occasions needing water proofing, pollution prevention, mist resistance, snow cover resistance, ice coating resistance, oxidation prevention and the like; and the super-hydrophobic film adopts the film matrix, occupies little space, and is convenient and simple to use.

The invention relate to a non-crystallization type permanent hydrophilic polyvinylidene fluoride material and the preparation method thereof. The invention adopts crystalline non-crystallization type polyvinylidene fluoride macromolecules, mixes the polyvinylidene fluoride macromolecule with long chain hydrophilic or long chain hydrophilic and noncrystalline hydrophobic macromolecules; thus, the polyvinylidene fluoride macromolecules and water-soluble long chain macromolecules physical cross-linking are formed in polar excellent solvent, and liquid-liquid phase separation is realized via adding micromolecule addictives and improving the temperature of coagulation bath at the same time to speed up the phase separation of the macromolecules; after treatment, the permanent hydrophilic membrane material is obtained, the membrane material is mainly formed by amorphous macromolecule material, the crystallinity of the material is 0 to 0.4; the water contact angle is 0 to 50 degrees with permanent hydrophilicity.

The invention discloses a super-hydrophobic paper and a production method thereof. The production method comprises the steps as follows: forming a modified nanometer silicon dioxide coating with the particle size of 50-100 nm on the surface of general paper with texts or pictures, wherein the water contact angle on the surface of the paper is more than 150 DEG and the rolling angle of a water drop on the surface of the paper is less than 10 DEG. The texts and the pictures on the surface of the super-hydrophobic paper are clear, so that the super-hydrophobic paper has a wide application prospect in the fields of self cleaning, water and moisture prevention, book magazine and the like. The production method is simple in process, low in cost, environment-friendly and easy for industrialization, and does not need complex chemical treatment and expensive instrument equipment.

The present invention belongs to the field of porous polyvinyl chloride film material, and is especially super-hydrophobic porous polyvinyl chloride film and its preparation process. By means of solvent-precipitant phase conversion process, porous loose polyvinyl chloride film with surface micro structure of piled micron and nanometer level grains is prepared, and the film has water contact angle greater than 150 deg, water drop rolling angle smaller than 15 deg and extremely high super-hydrophobic property. The present invention provides new method of realizing super-hydrophobic characteristic of polymer film without modification of low surface energy matter and opens one new way of expanding the application fields of common plastics.

Provided are a method capable of evaluating adherent cells under an environment similar to an in vivo environment by a culture method similar to a two-dimensional culture, and applications thereof. An adherent cell culture method uses, as a culture chamber (10), a chamber in which two or more culture spaces each having an equivalent diameter (D) that is 1 to 5 times the diameter of a desired spheroid and each having a height (H) that is 0.3 to 5 times the equivalent diameter are arranged and a surface of each of the culture spaces has a water contact angle of 45 degrees or less. Spheroids of adherent cells are cultured in the respective culture spaces (11) arranged in the culture chamber (10).