70results about How to "Reduce surface charge" patented technology

An anaerobic digester system has a vertically upright vessel, a matrix arranged in the vessel supporting a microorganism biomass thereon, an input for supplying an input slurry of liquid and suspended solids at an upper portion of the vessel above the matrix, a gas output at the top of the vessel for withdrawing gas generated by anaerobic digestion of solids, and an effluent output at the bottom of the vessel for withdrawing liquid and remaining solids. The vessel has a preferred liquid height to diameter ratio of 2 to 1, and is constructed of inert fiberglass-reinforced plastic coated with a translucent blue gel pigment layer for filtering light at wavelengths that promote biomass cultivation. The matrix is formed as an array of panels mounted to a spindle with wheels fixed at spaced intervals along its vertical height, and the panel are made of a polyethylene grass matting providing a high surface area to volume ratio of at least 20 to 1. Gas from the top of the vessel is recycled to the bottom to generate bubbles for mixing the feedstock. The related method of anaerobic digestion includes comminuting input wastes with a slurry grinder into a pumpable slurry 8-10 % by weight solids, and providing as the biomass hydrolytic bacteria, and fermentative bacteria including acetogenic and methanogenic bacteria to produce a methane gas product. Other products include an organic soil additive, bacterial solids plant food, and a filtrate used as plant tonic.

Poly(amine-co-ester) polymers, methods of forming active agent-load nanoparticles therefrom, and methods of using the nanoparticles for drug delivery are disclosed. The nanoparticles can be coated with an agent that reduces surface charge, an agent that increases cell-specific targeting, or a combination thereof. Typically, the loaded nanoparticles are less toxic, more efficient at drug delivery, or a combination thereof compared to a control other transfection reagents. In some embodiments, the nanoparticles are suitable for in vivo delivery, and can be administered systemically to a subject to treat a disease or condition.

Polyamine-co-ester-co-ortho ester) polymers, methods of forming active agent-load nanoparticles therefrom, and methods of using the nanoparticles for drug delivery are disclosed. The nanoparticles can be coated with an agent that reduces surface charge, an agent that increases cell-specific targeting, or a combination thereof. Typically, the loaded nanoparticles are less toxic, more efficient at drug delivery, or a combination thereof compared to a control or other transfection reagents.

A bi-directional electrostatic microvalve includes a membrane electrode that is controlled by application of voltage to fixed electrodes disposed on either side of the membrane electrode. Dielectric insulating layers separate the electrodes. One of the fixed electrodes defines a microcavity. Microfluidic channels formed into the electrodes provide fluid to the microcavity. A central pad defined in the microcavity places a portion of the second electrode close to the membrane electrode to provide a quick actuation while the microcavity reduces film squeezing pressure of the membrane electrode. In preferred embodiment microvalves, low surface energy and low surface charge trapping coatings, such as fluorocarbon films made from cross-linked carbon di-fluoride monomers or surface monolayers made from fluorocarbon terminated silanol compounds coatings coat the electrode low bulk charge trapping dielectric layers limit charge trapping and other problems and increase device lifetime operation.

To provide an electrostatic actuator that generates high pressure under a given voltage and includes an insulating film exhibiting excellent insulation resistance, a droplet discharge head that includes the electrostatic actuator and a method for manufacturing the droplet discharge head, a droplet discharge apparatus that includes the droplet discharge head and has excellent printing performance, and a device that includes the electrostatic actuator and has excellent driving performance. A diaphragm 12, a counter electrode 17 opposite to the diaphragm 12 with a gap interposed therebetween, and an insulating film 16 on a surface of the diaphragm 12 opposite to the counter electrode 17 are included. The insulating film 16 includes at least a dielectric film 16a formed of a substance having a higher relative dielectric constant than silicon oxide.

The present invention relates to a method for preparing bioethanol from lignocellulosic biomass. The method of the present invention is capable of: minimizing the impurity content of an enzymatic saccharification raw material, by extracting biomass using hot water, before pretreatment, and removing extractable substances such as inorganic salts; suppressing, to the greatest extent, the production of overdecomposition products of sugar, by pretreating the biomass, from which the hot water extractable substances have been removed, in a condition for maximizing xylan yield; preparing fermentable sugar at a low cost, without washing a pretreated solid obtained from subsequent solid-liquid separation, but by only concentrating a sugar solution obtained after enzymatic saccharification, using a separation film; and preparing bioethanol therefrom in high yield.

An electrophotographic photoconductor comprising a conductive support, an undercoat layer and a photosensitive layer, the undercoat layer and the photosensitive layer being formed on the conductive support in sequence, wherein the undercoat layer contains a binder resin, titanium oxide particles surface-treated with at least anhydrous silicon dioxide and titanium oxide particles surface-treated with at least hydrous silicon dioxide.

A bi-directional electrostatic microvalve includes a membrane electrode that is controlled by application of voltage to fixed electrodes disposed on either side of the membrane electrode. Dielectric insulating layers separate the electrodes. One of the fixed electrodes defines a microcavity. Microfluidic channels formed into the electrodes provide fluid to the microcavity. A central pad defined in the microcavity places a portion of the second electrode close to the membrane electrode to provide a quick actuation while the microcavity reduces film squeezing pressure of the membrane electrode. In preferred embodiment microvalves, low surface energy and low surface charge trapping coatings, such as fluorocarbon films made from cross-linked carbon di-fluoride monomers or surface monolayers made from fluorocarbon terminated silanol compounds coatings coat the electrode low bulk charge trapping dielectric layers limit charge trapping and other problems and increase device lifetime operation.

An application of verbascum glycoside in preparing the medicines for treating cancers by oral application or injection is disclosed.

The invention discloses a cathode material of a solid oxide fuel cell and a preparation method thereof. The cathode material is characterized in that the cathode material is a composite negative electrode formed by a perovskite oxide and an oxide MO2 modified on the surface of the perovskite oxide, wherein M is Ti, Zr, Nb, Ce, Ru or Sn, the mass content of the oxide MO2 in the composite negative electrode accounts for 1-20%, the particle size of the oxide MO2 is 0.5 to 100 nanometers, and the oxide MO2 in the composite negative electrode coats the surface of the perovskite oxide. The perovskite oxide can be first prepared on the surface of an electrolyte or a partition layer of the battery by methods of coating, silk-screen printing, flow casting and the like, and then the oxide MO2 is modified on the surface of the perovskite oxide in the negative electrode by methods of solution impregnation, sol impregnation, magnetron sputtering and the like. The cathode material disclosed by the invention is endowed with excellent electrochemical performance and favorable stability.

The invention discloses an antimony-based compound flame-retardant masterbatch for nylon 66 (PA66) and a preparation method of the antimony-based compound flame-retardant masterbatch. The flame-retardant masterbatch is prepared form, by weight, 40-60 parts of antimony trioxide, 10-30 parts of a flame retardant A, 10-30 parts of a flame retardant B, 2-5 parts of a coupling agent, 2-6 parts of a lubricant and 15-30 parts of PA66 carrier resin. The flame-retardant masterbatch is prepared through the steps of drying, surface modification, high-speed hot mixing, granulation and the like. The antimony-based compound flame-retardant masterbatch for nylon 66 (PA66) has the advantages of being high in flame-retarding efficiency, good in processability and the like, halogen-free and toxicity-free environment-friendly raw materials and auxiliaries are selected for preparation, a good flame-retarding effect can be achieved without adding halogen-based flame retardants for synergism, and the mechanical property of a composite is hardly influenced.

The present invention discloses an antimony oxide compound flame-retardant PVC soft composite material and a preparation method thereof. The composite material includes the following materials: PVC (SG-3), a plasticizer, antimony trioxide, ammonium molybdate, montmorillonite, a calcium zinc stabilizer, EVA, epoxy soybean oil, a coupling agent and a dispersing agent. The preparation process of the product is as below: modifying antimony trioxide; mixing the modified antimony trioxide with ammonium molybdate, montmorillonite and EVA; screening the mixture by a vibrating centrifugal screening machine; and drying the screened powder and conducting waterproof packaging. The product of the invention has efficient flame retardant and smoke suppression performance, limiting oxygen index up to 31.6%, elongation at break of 210% and Shore hardness as low as 17, can be used as a direct added raw material for PVC product, or be added as a modification additive, and can also be used as soft fireproof materials, such as PVC leather and protective decoration materials.

The invention discloses a magnetic nanometer gene vector system as well as a preparation method and an application thereof. The gene vector system comprises electronegative magnetic nanoparticles, positive-ion vectors and genes, wherein the three components are prepared into the magnetic nanometer gene vector system according to certain proportions and composite sequences through electrostatic interactions. The magnetic nanometer gene vector system disclosed by the invention is simple in preparation method and has physicochemical properties of small grain diameter and proper surface charge. Compared with non-magnetic nanometer composites, the magnetic nanometer gene vector system has the advantages that the transfection efficiency to cells of the system is remarkably improved under the action of an additional magnetic field; and meanwhile, the cytotoxicity of the system is further reduced.

The present invention discloses an antimony-based compounding flame retardant masterbatch for PVC and a preparation method thereof, and belongs to the technical field of flame retardant materials. The masterbatch includes the following raw materials by weight: 25-40 parts of antimony trioxide, 13-25 parts of molybdenum trioxide, 8-13 parts of montmorillonite, 3-8 parts of organic tin, 3-6 parts of a coupling agent, and 20 to 35 parts of a carrier PVC resin. The flame retardant masterbatch is prepared from the steps of antimony trioxide surface modification, raw material mixing and granulation. The present invention employs antimony trioxide, molybdenum trioxide and montmorillonite and other environmentally friendly halogen-free flame retardants as a compounding flame retardant system, integrates the advantages of the system in synergistic flame retardant, and smoke suppression performance, improves the flame retardancy and smoke suppression of the compounding complex retardant masterbatch. Addition of the flame retardant masterbatch can greatly improve the limiting oxygen index of the PVC composite material and reduce the amount of smoke, and the flame retardant masterbatch has the characteristics of high flame retardancy, strong smoke suppression, no additive migration, easiness to use, and easy dispersion.

The invention relates to a disposing method and device of papermaking waste water, and belongs to the technical field of water disposal. The disposing method includes steps of initially settling waste water for pulping and papermaking, and then adding biodegradable flocculating agent to perform the flocculating reaction; settling the flocculate; delivering the disposed waste water to an anaerobic reaction tower to react; after adding sodium carbonate precipitant in the produced water at the upper part of the anaerobic reaction tower, delivering to a tubular ceramic micro-filtration membrane filter to filter; delivering concentrated fluid of the tubular ceramic micro-filtration membrane filter to a plate frame type filter to perform filter pressing; returning the waste water after filter pressing to an anaerobic reaction tower to dispose; delivering the produced water of the tubular ceramic micro-filtration membrane filter to an aerobiotic pond to react; after settling the produced water of the aerobiotic pond through a settling pond, delivering the waste water to the ceramic micro-filtration membrane filter to filter; delivering penetrated liquid of the ceramic micro-filtration membrane filter to a reverse osmosis membrane to filter.

A semiconductor structure includes a SOI/BOX semiconductor substrate, a device, a deep trench, a silicon layer, and a dielectric layer. The deep trench is adjacent to the device and extends through a shallow trench isolation layer within the SOI layer and the BOX layer and into the base semiconductor substrate. The silicon layer is disposed within a lower portion of the deep trench. The silicon layer has a top surface height substantially the same as or lower than a top surface height of the base semiconductor substrate. The dielectric layer is disposed within the deep trench and on the silicon layer. The deep trench can be formed before or after formation of an interlayer dielectric.

The present invention provides a method for preparing an ion optical device. A substrate is fabricated with a hard material adapted for a grinding process, the substrate at least including a planar surface, and including at least one insulating material layer. Next, one or more linear grooves are cut on the planar surface, to form multiple discrete ion optical electrode regions on the planar surface separated by the linear grooves. Then, conductive leads are fabricated on other substrate surfaces than the planar surface and in a through hole inside the substrate, to provide voltages required on ion optical electrodes. By using high-hardness materials in cooperation with high-precision machining, higher precision and a desired discrete electrode contour can be obtained.

The invention relates to an environment-friendly cation emulsified water-based cutting fluid and a preparation method thereof. The preparation method is characterized by comprising the following steps: preparation of a component A: respectively adding 3-8% of quaternary ammonium salt, 5-8% of Tween -40, 0.05-0.2% of calcium chloride, 0.01-0.08% of magnesium sulfate, 16-30% of gear oil 200# and 54-76% of deionized water into a reaction kettle for uniformly stirring, heating the mixture until the temperature is within 45-65 DEG C, and keeping the temperature for 20-30 minutes to obtain the component A; preparation of a component B: respectively adding 20-40% of extreme pressure antiwear additive, 2-10% of preservative, 5-20% of antirust, 0.04-0.3% of calcium chloride, 0.01-0.06% of magnesium sulfate and 30-72% of the deionized water into the reaction kettle for uniformly stirring, heating the mixture until the temperature is within 55-75 DEG C, and keeping the temperature for 25-35 minutes to obtain the component B; and after the component A and the component B are prepared, mixing and stirring the component A and the component B according to the mass ratio of 2:1-1:2 to be invalid, heating the mixture until the temperature is within 65-80 DEG C, keeping the temperature for 35-45 minutes, and then cooling to normal temperature to obtain the product of the invention. The product of the invention has the advantages of high wear resistance, water solubility and lubricating property, good anti-rust property, no corrosion, good cooling property, convenient cleaning, cheap price and the like.

The invention discloses a preparation method of a flocculating agent used for treating oily sewage, which is mainly characterized in that chitosan is used as the main material, meanwhile, poly-ferricsulfate, poly-aluminum sulfate, poly (diallyldimethylammonium chloride) and thiocarbanilide copper complex are added in the preparation process to perform modification treatment, and a steady chelatecompound is formed by amino groups and carboxy groups in chitosan molecules and mercury, lithium, copper, lead, silver and other heavy metal ions in sewage, so as to remove and recycle metal ions in waste water. The flocculating agent prepared according to the invention has a good adsorption effect, and the better the biocompatibility is, the stronger the adsorption effect for grease dirt is. Theflocculating agent can also be used for decoloration of waste water in sewage treatment, and adsorption and flocculating reaction and the like of waste water in industrial production, thus having goodpopularization and application values.

Poly(amine-co-ester-co-ortho ester) polymers, methods of forming active agent-load nanoparticles therefrom, and methods of using the nanoparticles for drug delivery are disclosed. The nanoparticles can be coated with an agent that reduces surface charge, an agent that increases cell-specific targeting, or a combination thereof. Typically, the loaded nanoparticles are less toxic, more efficient at drug delivery, or a combination thereof compared to a control or other transfection reagents.

This disclosure provides systems, methods and apparatus for electromechanical systems devices with improved electrical properties and device life span. In one aspect, a conformal antistiction layer is formed within a cavity of an electromechanical systems apparatus over a roughened surface. The conformal antistiction layer can include a dielectric layer. The conformal antistiction layer can include a self-assembled monolayer (SAM) formed over the dielectric layer. The conformal antistiction layer can replicate the roughness of the surface that it is deposited on.