37results about How to "Increase surface potential" patented technology

A tissue product comprising an additive composition onto at least the surface of a fibrous article in order to increase the surface potential of the article, while retaining or improving manufacturing efficiency is disclosed. The additive composition comprises a bacteriostatic component and more preferably a water-soluble adhesive component and a bacteriostatic component. In some aspects, the additive may also contain additional water-soluble modifier components. Tissue products according to the present disclosure can attract and trap negatively charged matter, such as bacteria, into the tissue web. As such, tissue products can pickup bacteria from a surface and substantially hold the bacteria in the sheet to help prevent spreading bacteria to other surfaces.

Disclosed is a polymeric electret film as well as the method of manufacturing the same. The polymeric electret film comprises a polytetrafluoroethylene film and an electrode layer. The polytetrafluoroethylene film includes a porous layer, which has a porous structure. The porous structure has a pore diameter ranging between 0.01 μm and 5.0 μm and has a porosity ranging between 20% and 95%. The polytetrafluoroethylene film has a thickness ranging between 1 μm and 50 μm, and is preferably made of expanded porous polytetrafluoroethylene. The polymeric electret film has a surface potential ranging between 0.1 V and 1000 V.

The invention discloses silicon carbide composite powder as well as a preparation method and application thereof. A granulation method of the silicon carbide composite powder comprises the following steps: (1) uniformly mixing beta-SiC micropowder with water and a dispersing agent in a mass ratio of (0.1-0.2) to 1 to (0.03-0.08), putting the mixture into a sand mill, and carrying out circularly grinding, so as to obtain nano-beta-SiC slurry, wherein the average grain diameter of the beta-SiC micropowder is not more than 1.5 micron; (2) adding micron-scale alpha-SiC and a bonding agent into the nano-beta-SiC slurry, and uniformly stirring, so as to obtain mixed slurry, wherein the mass of micron-scale alpha-SiC is 0.8-0.9 of the mass of the mixed slurry, and the mass of the bonding agent is 0.03-0.05 of the mass of the mixed slurry; and (3) conveying the mixed slurry into a spray granulation machine through a peristaltic pump, so as to obtain silicon carbide composite granulated powder. By introducing nano-scale beta-SiC, the sintering temperature can be decreased, the tenacity and strength of ceramic can be increased, and more importantly, nano-scale beta-SiC can be gradually converted into alpha-SiC in a uniform phase during the sintering, so that the stability of the use performance of the silicon carbide ceramic is not degraded.

The invention relates kinds of method for intensifying filter effictiveness with filter-media modification and dynamic casting of medicine in treatment of water and sewage water, the filter-media modification and dynamic casting of medicine intensifying filter effictiveness method. This invention can be through with the steps as follows: (1) before filtering, decline negative electricity in surface of filter media, or increase modified ability of positive electricity in surface of filter media; (2) in procedure of filtering, cast medicine for intensifying filter efficiency continually. The step of (1) can germinate the particle, in surface of which contains the elements such as Iron, Manganese, Calcium, Silicon, Magnesium, Aluminum, and so on. So it increases electric potential to the surface of filter media, improves absorbability of impurity particle and makes this granule be prone to depositing in the surface of filter media. The step of (2) increases electric potential to the surface of colloidal particle in water by casting medicine for intensifying efficiency continually in filtering procedure, so that it can increase absorbability of colloidal particle in the surface of filter media. The organic association with couple of devices can increase absorbability of colloidal particle in the surface of filter media in water, and intensify removal ability of turbidity in water.

Provided is a developing roller in which printing quality, in particular, one-dot level fine line printing quality is improved by securing a high resistance value and high surface potential on the surface layer. The elastic roller comprises successively on the outer periphery of a shaft 1 an elastic layer 2, an intermediate layer 3, and a surface layer 4. The surface layer 4 contains a urethane (meth)acrylate oligomer obtained by allowing polybutadiene polyol or hydrogenated polybutadiene polyol, polyisocyanate, and (meth)acrylate having a hydroxyl group to react.

The present invention relates to a preparation method by self-lubrication composite electroless plating. It belongs to the field of electroless plating. The procedure is: 1) Fluorine carbon surfactant C20H20F23N2O4I which is commonly used for foam extinguisher is dissolved in PTFE latex emulsion to form mixture A, and SiC or Si3N4 or Al2O3 is dissolved in cetyl trimethyl ammonium bromide to form mixture B. 2) Preparation of plating solution, i.e. nickel sulfate, lactic acid, sodium acetate, sodium hypophosphite, propenysulfocarbamide are added in plating cell at room temperature, and pH is adjusted with sodium hydroxide. 3) Composite electroless plating: the mixture said A and said B are added in the plating solution prepared in step 2) and then heated. Consistent stirring is kept during plating and then self-lubrication composite electroless plating layer is obtained. The invention adopts different suitable surfactants depending on different grains to improve Zeta potential of the grain surfaces and suspensibility of the grains in plating solution through adsorption effect of different grains on different surfactants so as to further realize co-deposition of grains.

A method and system for identifying and classifying non-uniformities on the surface of a semiconductor or in a semiconductor. The method and system involves scanning the wafer surface with a non-vibrating contact potential difference sensor to detect the locations of non-uniformities, extracting features characteristic of the non-uniformities, and applying a set of rules to these features to classify the type of each non-uniformity.

A method for sealing through-holes in a material via material diffusion, without the deposition of a sealant material, is disclosed. The method is well suited to the fabrication and packaging of microsystems technology-based devices and systems. In some embodiments, the method comprises forming sacrificial material release through-holes through a structural layer, removing the sacrificial material via an etch that etches the sacrificial material through the release through-holes, and sealing of the release through-holes via material diffusion.

The invention discloses a preparation method and a use method of magnetic porous biochar for removing chromium in water. Fe (III) is used as a magnetic precursor; by carrying out low-speed pyrolysis and in-situ carbon reduction after dipping and loading, artemia cyst shells are prepared into the magnetic porous biochar; the magnetic porous biochar can be used for removing Cr (VI) and Cr (III) in water, when the magnetic porous biochar is used, the magnetic porous biochar is put into chromium-containing water, the magnetic porous biochar adsorbent is subjected to magnetic separation or standingprecipitation separation after a certain period of time, chromium removal is completed, and when common anions in water coexist, a high chromium removal rate can still be obtained, and meanwhile, themagnetic porous biochar can be repeatedly used.

Provided is an electret electrode having an improved surface charge density. A conductive film (111) is formed on a substrate (102). On the conductive film (111), a first insulating film (112) and a second insulating film (113) are alternately layered. After this, electret films (110a to 110d) having a lower surface, an upper surface, and side surfaces covered with a third insulating film (114) and a fourth insulating film (115) are arranged so as to constitute an electret electrode (100). Since the first insulating film (112) and the second insulating film (113) exist between the electret films (110a to 110d) and the conductive film (111), if the same electric charge is held, the electric field intensity in the film becomes small, and if the same electric field intensity is present, the surface charge density (surface potential) can be increased.

A surface layer of the electrophotographic photosensitive member has a change region in which a ratio of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of carbon atoms gradually increases toward a surface side of the electrophotographic photosensitive member from a photoconductive layer side, wherein the change region has an upper charge injection prohibiting portion containing a Group 13 atom, and a surface-side portion which is positioned closer to the surface side of the electrophotographic photosensitive member than the upper charge injection prohibiting portion and does not contain the Group 13 atom, and the distribution of the Group 13 atom in a boundary portion between the surface-side portion and the upper charge injection prohibiting portion is precipitous.

The invention relates to an electroplating process. The electroplating process mainly comprises the following steps of carrying out pre-electroplating treatment, carrying out nickel electroplating, carrying out recovery, carrying out chromium electroplating and carrying out after-electroplating treatment. Electroplating equipment special for the electroplating process is combined, wherein the electroplating equipment comprises a hanging rack head and an electroplating hanging rack; the hanging rack head comprises a supporting arm capable of supplying power and a hanging plate assembly connected with the supporting arm, the hanging plate assembly comprises a conductor hanging plate and a connecting part, and the connecting part is further connected with an auxiliary hanging plate which is arranged in parallel with the conductor hanging plate; and the electroplating hanging rack comprises a main hanging rack and an auxiliary hanging rack, the two sides of the main hanging rack are provided with bearing frame bodies which can be used for containing to-be-electroplated workpieces at intervals respectively, and auxiliary conductors are arranged on the positions, corresponding to the bearing frame bodies, of the auxiliary hanging rack. The special electroplating equipment is matched with the special electroplating process, and therefore electric potential of the inner surfaces of theelectroplated workpieces can be enhanced during the electroplating process, and electroplated layers on the inner surfaces of the electroplated workpieces can be attached to the inner surfaces and uniform; and the electroplating equipment can be applied to the electroplated workpieces of any shape, so that the application range of the equipment is expanded.

Provided are an element applicable to a high-precision, high-sensitivity pressure detecting sensor and switch, a manufacturing method for the element; and a sensor, an electronic circuit, and an input device that include the element. The electret element of the present invention has a semiconductor sandwiched between a pair of electrodes, and an electret film disposed at a location opposite to the semiconductor via a gap. The electret element of the present invention may be structured so that the semiconductor contacts with the electret film, or so as to have micro-sized gaps therebetween. The electret film is semi-permanently kept in a positively or negatively charged state. By having a structure in which the electret film can contact with or approach the semiconductor, an amount of electric currents flowing between the pair of electrodes can be controlled.

The invention discloses a bark-like polypropylene/polycarbonate nanofiber meltblown air filter material and a preparation method thereof. The method comprises the following steps: step 1, polypropylene and polycarbonate are dried and mixed, and then a two-component polypropylene/polycarbonate mixed masterbatch is prepared through a granulator; and step 2, the polypropylene/polycarbonate masterbatch obtained in the step 1 is poured into a feeding barrel of meltblown equipment, then passes through a pipeline, a metering pump and a die head in order, and finally is blown to the meltblown filter material. Under action of meltblown hot air, polycarbonate with a low content and a high viscosity plays a role in drawing and thinning polypropylene fiber, and an average fiber diameter can reach nano-scale. At the same time, bark-like grooves can be produced on the surface of the polypropylene fiber under action of drawing and thinning, a specific surface area of the filter material is improved,and the grooves are more conducive to interception of atmospheric particles, so that a new design idea for an application of meltblown materials on air filtration fields is provided.

The invention relates to a passive electronic signpost based on an energy collector. The electronic signpost comprises a plurality of electronic luminous signposts, a pedal and a plurality of keys. Apower generation device used for converting kinetic energy generated when the pedal is treaded into electric energy is arranged below the pedal. A power generation device used for converting kinetic energy generated when the keys are touched into electric energy is arranged below the keys, the power generation device adopts more than one electret film energy collector, and the electret film energycollectors are electrically connected with the electronic light-emitting indication boards one by one. According to the passive electronic signpost based on the energy collector, a power supply doesnot need to be installed for power supply, line connection is relatively simple, installation and maintenance cost is low, the environment is not affected, and interestingness is improved.

The invention relates to paper-based filter material base paper for replacing mask melt-blown cloth and a preparation method of the paper-based filter material base paper. The paper-based filter material base paper for replacing the mask melt-blown cloth is characterized in that the physical properties are as follows: the quantification is 20-40 g/m<2>, and the tensile strength is 2 KN/m-4 KN/m; the wet strength is 15%-30%; the bulk is 1.3 to 1.8 m<3>/g; the average pore diameter is 30 [mu]m to 55 [mu]m; the respiratory resistance ranges from 30 Pa to 170 Pa; the surface potential after electret is 300 V-600 V, and the particulate matter filtering efficiency is 50%-80%. Plant fibers and polylactic acid fibers are used as filter materials for replacing polypropylene melt-blown cloth for thefirst time, and an anion fiber coating containing the nanofibers is sprayed to solve the problems that after plant fibers and polylactic acid fibers form paper, gaps are large, and the filter efficiency is low.

The invention belongs to the technical field of water evaporation power generation, and relates to a two-dimensional metal oxide single-layer nanosheet for water evaporation power generation, which comprises the following steps: coating a two-dimensional transition metal oxide single-layer nanosheet rich in cation defects on a support substrate provided with an electrode as a power generation device for water evaporation power generation. According to the invention, the two-dimensional transition metal oxide single-layer nanosheet rich in cation defects is used as a main body material for water evaporation power generation for the first time, and has very excellent open-circuit voltage performance.