159results about How to "Improve cell structure" patented technology

Process for the preparation of foamed thermoplastic polyurethanes characterized in that the foaming of the thermoplastic polyurethane is carried out in the presence of thermally expandable microspheres.

Described is a deformable, variable-stiffness cellular structure. The cellular structure a group of unit cells with each unit cell having a cellular geometry. The group of unit cells are formed of a variable-stiffness composite material (VSM). The VSM has a first stiffness state and a second stiffness state. Additionally, the cellular structure has a first shape and a second shape, with a gradation of shapes between the first shape and second shape. The transition from the first shape to the second shape occurs through using an actuation signal to actuate the VSM to change the stiffness of the cellular structure, thereby allowing the cellular structure to be deformed from the first shape to the second shape, and any shape therebetween. The cellular structure can be locked in the second shape through actuating the VSM from the second stiffness state to the first stiffness state.

The invention belongs to the technical field of fecal microbiota transplantation, and particularly relates to a fecal microbiota capsule, as well as a preparation method and application of the fecal microbiota capsule. The preparation method comprises the following steps: (1) a fecal microbiota solution is prepared; (2) the fecal microbiota solution, obtained in the step (1), is added with a freeze-drying protective additive, and freeze drying is performed to obtain fecal microbiota freeze-dried powder; (3) a capsule is filled with the fecal microbiota freeze-dried powder, obtained in the step (2), to obtain the fecal microbiota capsule. Through adoption of the fecal microbiota capsule, flora is enabled to be comparatively concentrated and can be preserved for a long time at a low temperature; implementation of flora transplantation is facilitated, and invasive implementation manners, such as a gastroscope, an enteroscope and a nasointestinal feeding tube, are not needed; when the fecal microbiota capsule is applied to weak patients, the safety is increased.

A spin transfer torque magnetic random access memory (STT-MRAM) device comprises adjacent magnetic tunneling junctions (MTJ), respectively, formed in different layers, thereby preventing interference between the MTJs and securing thermal stability.

Isocyante-based polymer foams containing functionalized nano-scale materials in which the functional groups are OH, NH2, COOH or NCO groups. The incorporation of such functionalized nano-scale materials into the isocyanate-based polymer foams provides foams with improved properties such as insulation values, mechanical properties and flame retardancy performance properties, including but not limited to k-factor and dimensional stability.

The invention discloses a low-density and low thermal-conduction-index polyurethane foam stabilizer and a preparation method thereof. The stabilizer can be widely used in polyurethane blowing technique, and enable the thermal conduction index of the pentane-blowing polyurethane foam to be lowered down to 0.0195-0.0200W / m.K, and has excellent functions of heat protection and heat preservation. The low-density and low thermal-conduction-index polyurethane foam stabilizer of the invention is provided with the structures: wherein, the figure of m is 10-80, the figure of n is 1-10, the figure of x is 10-70, the figure of y is 0-30, and m plus n is 11-90, x plus y is 10-100; R can be paraffin, radical aromatic, acyloxy or hydrogen atom that contains 1-4 carbon atoms.

An olefinic thermoplastic elastomer foam of the present invention has a density of less than 700 kg / m<3>, a compression set of less than 60% and a density of elastically effective chains v of preferably 3.0x10<-5 >to 2.0x10<-4 >(mol / cm<3>). An olefinic thermoplastic elastomer composition for preparing the above foam has an equilibrium creep compliance Je<0 >of 1.0x10<-6 >to 5.0x10<-4 >(Pa<-1>) and contains a crosslinked olefin rubber and an olefin plastic in a specific proportion. The olefinic thermoplastic elastomer composition can be prepared by melt kneading a specific crosslinked olefinic thermoplastic elastomer and a specific olefin plastic. The olefinic thermoplastic elastomer composition is preferably foamed by at least one foaming agent selected from an organic or inorganic thermally decomposable foaming agent, carbon dioxide and nitrogen, together with a specific foaming auxiliary such as citric acid. The olefinic thermoplastic elastomer foam is particularly suitable to use as an automotive sponge weatherstrip, a clearance-filling foamed sheet, a building sash sponge seal, a pipe-joint sponge seal, a protect sponge or a thermal insulating sponge tube. The olefinic thermoplastic elastomer composition according to the invention can provide the foams which have no surface roughness, a low density and a low compression set, preferably a good appearance and a kink resistance. The olefinic thermoplastic elastomer foams can be used as substitutes for vulcanized rubbers.

The invention discloses a special foaming agent for a hard PVC (polyvinyl chloride) low-foaming material and a preparation method thereof. The special foaming agent comprises the following materials in parts by weight: 20-80 parts of azodicarbonamide (ADC), 20-80 parts of auxiliary foaming agent, 1-20 parts of activating agent, 0.2-10 parts of dispersing agent and 0.2-5 parts of processing agent. The preparation method comprises the steps: adding the dispersing agent and the processing agent in a mixer, mixing for 3-7 minutes, and sequentially uniformly mixing the ADC, the auxiliary foaming agent and the activating agent in the mixer to prepare the special foaming agent. The special foaming agent is suitable for hard PVC low-foam materials such as PVC crushing and low-foaming sectional bars, tubular products and sheets, a wood-plastics low-foaming material and the like. The special foaming agent has the positive effects that 1, the decomposition temperature is 160-190 DEG C, and is within a processing temperature range of the hard PVC low-foaming material; 2, the foaming process is short in induction period, the decomposition is performed without mutation, and the foaming process is easily controlled; 3, the hard PVC low-foaming material is used on a hard PVC low-foaming product, and has a smooth surface and has no discoloring and ageing phenomena; and 4, the special foaming agent is low in cost and good in comprehensive performance, and accords with the use requirement.

An object of the present invention is to provide a polyimide porous body having an excellent heat resistance, a fine cell structure, and a low relative dielectric constant, and a method for producing the polyimide porous body. The present invention relates to a method for producing a polyimide porous body, comprising a step for applying a polymer solution containing a polyamide acid, a phase separation agent for separating the phases of the polyamide acid, an imidization catalyst, and a dehydrating agent, on a substrate, and drying the polymer solution to produce a phase-separated structure body having a microphase-separated structure; a step for producing a porous body by removing the phase separation agent from the phase-separated structure body; and a step for subjecting the polyamide acid in the porous body to imidization to synthesize a polyimide.

The invention provides a polymer / graphene aerogel composite foam material which is prepared from graphene aerogel and a thermoplastic polymer, wherein the graphene aerogel serves as a framework, the thermoplastic polymer is attached to the three-dimensional net structures of the graphene aerogel, and foam holes with closed pore structures are formed in the thermoplastic polymer. The composite foammaterial has mutually communicated three-dimensional net structures, and the content of the graphene aerogel in the composite foam material is 0.5%-10%. The invention also provides a preparation method of the composite foam material. The invention provides a new idea for solving the problem of agglomeration of graphene in polymer matrix materials.

Foams for filling cavities and crevasses and for forming foamed products are provided. The latex foam may include an A-side containing a functionalized latex and a B-side that contains a crosslinking agent and optionally a non-functionalized latex. The A- and / or B-side contain a blowing agent package or components forming the blowing agent package. The blowing agent package may be the combination of two or more chemicals that when mixed together form a gas or a chemical compound that, when activated by heat or light, forms a gas. In an alternate embodiment, the latex foam includes a functionalized latex, an acid, and an encapsulated crosslinking agent and base. Alternatively, the spray latex foam may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application.

The invention discloses high-strength polyurethane rigid foam, as well as a preparation method and application thereof. The invention introduces a benzoyl imide reinforced polyurethane modifier with a rigid structure; the benzoyl imide reinforced polyurethane modifier, the corresponding high-viscosity aromatic amine polyether polyol, low functionality polyether polyol, special silicon oil for increasing isotropy of the foam, a catalyst with a specific structure, water and a foaming agent are used for preparing the premixed polyether polyols and react with the polyisocyanates to generate the high-strength polyurethane foam. The polyurethane rigid foam provided by the invention has the characteristics of low batch charging density, high compressive strength, low heat conductivity coefficient and good size stability under low temperature, and can be used in the household appliance inside insulating materials such as the fridge, the refrigerator, the solar energy, the gas water heater and the disinfection cabinet.

The present invention relates to polysiloxane polyether copolymers which comprise at least one (polyether) moiety which comprises at least one unit —O—C(O)—O—, to a process for the production of the polysiloxane polyether copolymers, and also to the use of the polysiloxane polyether copolymers as stabilizers in the production of polyurethane foams, and also to polyurethane foams and items therefrom which are obtainable through the process.

An apparatus and method for creating a venturi effect through an orifice.

The invention relates to a polylactic acid foamed sheet and a preparation method thereof. The foaming ratio of the polylactic acid foamed sheet is 20 to 30 times; the pore density is 10.2-13.4*10<9> pores for each cubic centimeter; the diameter of pores is 4 to 15 [mu]m, and the thermal deformation temperature is 95 to 105 DEG C. According to the preparation method, polylactic acid is taken as thematrix, a nucleating agent and a chain extender are added to obtain a mixture; the mixture is extruded in a double screw extruder to obtain polylactic acid foamed modified resin; then the modified resin and optionally picked color master batch are added into the hopper of a foaming extruder composed of two extrusion systems, which are serially connected; the mixture is melted and plasticized in the primary extruding system, then a foaming agent is added, then the mixture is mixed and cooled in the secondary extruding system to obtain low temperature homogenous melt; the melt is extruded fromthe head of a controllable foaming machine, and finally the foamed sheet is obtained after sizing cooling, part spreading, and rolling. The provided polylactic acid foamed sheet has the advantages ofhigh foaming ratio, good foaming performance, good heatproof property, good pore structure, simple technology, and controllable cost.

A system and apparatus for treatment of cellular structure anomalies, principally in human patients, utilizes precisely controlled electromagnetic wave energy and electromagnetic field energy. The former energy is generated from a combination of coherent and incoherent light energy which is joined and focused on patients thru a unique arrangement of faceted coated reflectors and filters. The latter energy is generated in part by unique coils surrounding the light sources which include coils wound with bifilar wire. The disclosed apparatus also includes a platform, preferably segmented, that facilitates alignment of a patient's bodily area needing treatment. Additional coils are placed in the platform in strategic locations proximate the area of the patient to be treated. A digital control module can be programmed to regulate the frequency, duration, phase, duty cycle, pulse and amplitude of all energy sources in the claimed systems.

A system using cross polarization effects and an enhancement agent having citric or other similar alpha hydroxy acid to enhance confocal microscope reflectance images and particularly images of the nuclei of BCCs (basal cell carcinomas) and SCCs (squamous cell carcinomas) in the confocal reflectance images of excised tumor slices obtained during Mohs surgery by illuminating the tissue being imaged (a tumor slice) using polarized light. The reflected illumination is passed to a polarization analyzer, which passes the polarization component which is crossed with respect to the polarization of the illuminating light. The light from the analyzer is passed through the confocal aperture and detected. The section of the tissue either at the surface or within the tissue is scanned and the reflectance image is produced with enhanced visualization of the cellular or nuclear structure thereof thereby enabling determination of the extent of the tumor (cancerous cells) in the section. A method is also provided using the system for diagnosing cancerous cells in skin tissue.

The invention relates to biomass-based polyurethane foam containing vegetable oil residue, which is composed of a biomass liquification product, a catalyst, a foam stabilizer, vegetable oil residue and isocyanate. The invention also relates to a preparation method of the biomass-based polyurethane foam containing vegetable oil residue. The polyurethane foam provided by the invention has better degradation property, thus waste biomass is completely utilized and the pressure of petrochemical resources is reduced; the preparation cost is lower, and the raw materials are inexpensive, easily available and renewable; and the pore structure of the polyurethane foam material is improved and the compressive strength of the foam is improved.

Process for making crunchy flavorful nut products comprising contacting raw nuts with a water source effective to moisten the nuts without immersing the nuts in the water source, and roasting the moistened nuts. The nut products are crunchy and retain nut flavor when processed in this manner.

Materials and methods for providing building barriers are provided. The material may comprise a latex foam, which may include an A-side containing a functionalized latex and a B-side that contains a crosslinking agent and optionally a non-functionalized latex. The A- and / or B-side may contain a blowing agent package or components forming the blowing agent package. The blowing agent package may be the combination of two or more chemicals that when mixed together form a gas or a chemical compound that, when activated by heat or light, forms a gas. In an alternate embodiment, the latex foam includes a functionalized latex, an acid, and an encapsulated crosslinking agent and base. Alternatively, the spray latex may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application.

The invention discloses an injection molding grade polypropylene microcellular foam composite material and a preparation method thereof. The preparation method comprises the step of carrying out microcellular injection molding foaming with an injection molding machine after uniformly mixing 90-99.9wt% of polypropylene composite material with 0.1-10wt% of foaming agent, wherein the polypropylene composite material is prepared from the following raw materials by weight percent: 42-95% of conventional polypropylene, 0.1-15% of micro-crosslinked polypropylene, 0.1-10% of polyethylene, 0.1-25% of talcum powder filler, 0.1-15% of toughening agent, 0.1-5% of antioxidant and 0-3% of other aids; the foaming agent is modified sodium bicarbonate. The polypropylene composite material has higher melt strength. The polypropylene microcellular foam material prepared from the polypropylene composite material is fine and uniform in pores, well maintains the original mechanical properties of the materials and also takes modified sodium bicarbonate as the foaming agent, thus preventing the obtained product from producing unpleasant odor.

The invention discloses a compression deformation resistant and high hardness foam silicone rubber material and preparation method thereof. The foam silicone rubber material is made of component A andcomponent B which are of equal mass, wherein the component A includes, by mass ratio, 100 parts of liquid silicone rubber, 0.5 to 2 parts of foaming agents, 15 to 45 parts of aids, 0.25 to 2 parts ofcatalysts, and 1 to 5 parts of colorants, and component B includes, by mass ratio, 100 parts of liquid silicone rubber, 0.5 to 2 parts of foaming agents, 25 to 55 parts of aids, 1 to 5 parts of crosslinking agents, and 0.5 to 2 parts of inhibitors. The compression deformation resistant and high hardness foam silicone rubber material has the advantages of having good thermal insulation, high hardness, delicate cells of a closed-cell structure and good compression set performance, being capable of not only providing a good cushioning effect when the device is impacted but also being used as aninsulating product to retard thermal diffusion, and reducing the risk in life.

A plasma display panel has an improved cell electrode structure including: a pair of sustaining and scanning electrodes which are approximately similar or equal in area to each other, and which are different from each other in pattern shape. Each of the scanning electrode alignments further includes a plurality of scanning electrodes. Adjacent two of the scanning electrodes are separated from each other by the separation wall. Each of the sustaining electrode alignments further includes a plurality of sustaining electrodes. Adjacent two of the sustaining electrodes are separated from each other by the separation wall.

A nonvolatile memory (NVM) cell includes a semiconductor substrate having therein an N well and a P well; a first OD region and a second OD region disposed within the N well; a PMOS select transistor disposed on the first OD region; a PMOS floating gate transistor serially connected to the select transistor and being disposed on the on the first OD region, wherein the PMOS floating gate transistor comprises a floating gate overlying the first OD region; and an assistant gate protruding from one distal end of the floating gate to one edge of the second OD region such that the assistant gate is capacitively coupled to the second OD region and the N well. The select transistor, the floating gate transistor and the assistant gate disposed on the same N well.

The invention discloses waterborne impregnated resin, waterborne polyurethane superfine fiber synthetic leather and a preparation method of thewaterborne polyurethane superfine fiber synthetic leather. The waterborne impregnated resin is prepared from components in parts by weight as follows: 100 parts of a waterborne polyurethane emulsion, 5-30 parts of a water-soluble polymer, 0-100 parts of deionized water, 0.1-1 part of a wetting agent and 0-3 parts of a thickener. The preparation method of thewaterborne polyurethane superfine fiber synthetic leather comprises the following steps: sea-island non-woven fabric is impregnated in the waterborne impregnated resin and dried, and impregnated base cloth is obtained and fed into toluene for decrement; primary base cloth is obtained after washing and drying and is treated, and the waterborne polyurethane superfine fiber synthetic leather can be obtained. Environmental pollution is reduced greatly, part of soluble polymer granules are introduced, the release effect between fibers and resin is enhanced, and the obtained synthetic leather has a densercell structure.

A fabric reinforced closed cell foam composite having a textured or smooth surface which is substantially free of nodular surface irregularities. The fabric may be formed of woven fibers or of non-woven random fibers which are bonded together by resin or heat. The fabric is then coated to a suitable thickness with a foamed or unfoamed polymer formulation. The cushion has a high strength to weight ratio, is substantially impermeable to liquids, significantly dampens sound and absorbs energy. In addition, the cushion is non-slip, remaining substantially fixed in relation to the surface to which it is in contact by means of friction. Further, the surface of the cushion is relatively easily decorated with printed designs. Dyes could also be added to the foam formulation to produce a wide range of decorative colored cushions.

A high-voltage battery system is provided that ensures fail safety against a room-temperature short circuit and a high-temperature short circuit in a high-voltage battery in an electric vehicle. The battery system prevents secondary injury due to fire in a vehicle collision or in maintenance while ensuring fail safety against a room-temperature short circuit and a high-temperature short circuit by implementing a type of safety element that ensures fail safety by improving the structure of a cell tap, that is, by partially reducing the cross-sectional area of a current path such that a conductive portion is rapidly melted by substantially high heat when a short circuit occurs in a battery.