16 results about "Nanoporous membrane" patented technology

The application discloses a single-particle layer metal organic framework mixed matrix nanometer porous membrane and a preparation method thereof, and belongs to the field of functional materials and membrane separation technology. The preparation method comprises the following steps: firstly, synthesizing MOF nanoparticles; then, self-assembling the MOF particles and polystyrene balls on the water surface; after treatment, obtaining a MOF single-particle layer; finally, adding a proper amount of a polymer binder to fill the gaps between the MOF particles, so that a single-particle layer MOF mixed matrix nanometer porous membrane is obtained. The single-particle layer MOF mixed matrix nanometer porous membrane prepared by the preparation method is composed of a single-particle layer, has an ultrathin thickness and high strength, and the transmembrane transport of substances in the membrane only needs to pass through a single MOF particle, so that the nanometer porous structure of the MOF particle can be used to the maximum extent, the negative influence of polymer blockage and grain boundary between particles on the substance transport of the nanometer porous membrane is avoided, and the single-particle layer MOF mixed matrix nanometer porous membrane has high selectivity and high permeability.

The application discloses a composite film material with dynamic infrared stealth, electromagnetic shielding and heat management functions and a preparation method and application thereof. The composite film material is a three-layer asymmetric structure. A first outer layer is a nanoporous film for reflecting sunlight and transmitting infrared radiation. A middle layer is a uniform and dense MXene layer for absorbing sunlight, reflecting infrared radiation and shielding electromagnetic interference. A second outer layer is a heat-insulating PDMS layer with a patterned array design for high sunlight transmission and high infrared emissivity. The spectrum-selective nanoporous film / MXene / patterned PDMS composite film material with the asymmetric structure can have good infrared stealth, electromagnetic shielding and heat management performances under high, low and humidity conditions, and can be applied to the fields of shielding stealth and heat management under complex dynamic scenes.

The embodiment of the invention provides a preparation method of a nanopore film, which comprises the following steps: firstly, forming a plurality of nano-scale metal groups on the surface of a substrate, then carrying out plasma etching on the substrate to form nanopores at target positions of the substrate, the target positions comprising the positions where the nano-scale metal groups are located, etching gas adopted in the plasma etching comprises carbon-containing gas and oxygen-containing gas; thus, in the etching process, active free radicals dissociated from the etching gas are enriched at the position of the nanoscale metal group by utilizing the carbon dissolving capacity of the nanoscale metal group, so that the etching rate at the position of the nanoscale metal group is increased, and meanwhile, the oxygen-containing gas destroys a protective film formed by the carbon-containing gas; and further increase of the etching rate at the position of the nanoscale metal group is facilitated, so that the etching rate at the position of the nanoscale metal group is far higher than that at other positions. By adopting the method, the preparation cost of the nanopore film can be reduced.

Described herein is an alternating current electrospray technology comprising a hydrophobic nanoporous membrane that can generate monodisperse micron sized droplets at remarkably high throughput. The droplets can be used for ddPCR applications or for encapsulating extracellular vesicles or cells.

A method of making a nanoporous membrane is constructed using an array of sacrificial nanopillars that print removable material on a substrate. After continuous deposition or even of covering layers with different properties, the sacrificial nanostructure is dissolved, and finally the nanoporous membrane with nanopores, channels and cavities designed with nanoscale sizes and geometrical shapes is formed. Thus, unprecedented unique functions are achieved in various technical fields (e.g., bioartificial organs, nanoelectronics, bioelectronics, molecular sensors and biomedical applications).

An electrolyzer cell comprises a first half cell with a first electrode, a second half cell with a second electrode, a separator separating the first half cell from the second half cell, wherein a compressive load is applied between the separator and the first electrode or between the separator and the second electrode, or between both the first and second electrodes and the separator, and a nanoporous support structure located between the first electrode and the separator.

The present invention relates to methods for identifying the type and / or subtype of viral particles and / or extracellular vesicles using nanoporous membranes in combination with optical detection. The invention also relates to the use of this method, in particular for identifying / naming the type and / or subtype of viral particles and / or extracellular vesicles present in a biological sample. More specifically, the transport of viral particles and extracellular vesicles through the nanopore enables identification of the type of particles by specific interactions of viral particles and extracellular vesicles with said nanopore and modeling of this phenomenon, in particular using a bottleneck model.

This invention discloses a separator, its preparation method, and its application, relating to the field of battery separator technology. By first layering a stretched multilayer nanoporous membrane and then subjecting it to aging treatment, the membrane thickness is reduced and physical constraints are removed after layering, resulting in a smoother and more responsive release path for residual stress within the membrane. This effectively alleviates the localized high stress concentration phenomenon caused by the combined effects of thickness accumulation and memory effect. Furthermore, this invention utilizes a roll-up mechanism with adhesive strips. The spacing between the adhesive strips provides physical space for the membrane to freely retract during aging, further reducing the additional internal stress induced by hindered retraction. This makes the membrane deformation more uniform and reversible, ultimately significantly suppressing the occurrence of permanent appearance defects such as waviness and sagging edges.

The application discloses a kind of thin film hydrogen sensor based on inorganic-organic hybrid nanoporous membrane / semiconductor metal oxide and preparation method thereof, belong to hydrogen sensor field, the present application combines traditional semiconductor metal oxide with mesoporous inorganic-organic hybrid layer, on insulating inorganic or polymer substrate using molecular layer / atomic layer deposition technology, by introducing a porous hydroquinone zinc film (Zn-HQ), then depositing semiconductor metal oxide (MO) film, prepared MO / Zn-HQ composite film type hydrogen sensor, in the case where there is no noble metal modification, obtained sensitivity high, response fast, good selectivity, low-temperature workable semiconductor oxide film type hydrogen sensor.The hydrogen sensor structure is simple, hydrogen-sensitive performance is excellent, and the preparation process is compatible with microelectronic process, and it is convenient to be applied to integrated, miniaturized and intelligent microelectromechanical system and multifunctional sensor.

The invention discloses a nanopore membrane with MOFs grown on the outer surface and a preparation method and application of the nanopore membrane. According to the nanopore membrane, PDA is used for adhering a copper nanowire solution, MOFs evenly grow on the outer surface of the nanopore membrane through a hydrothermal method, and surface modification of the nanopore membrane is achieved; the MOFs are controlled to only grow on the outer surface and double-sided modification is performed on the specific probe, so that the risk of internal blockage of a pore channel is avoided, the anti-interference capability is greatly enhanced, double-sided modification is performed, the probe density is increased, more binding sites exist, the response time is shortened, charge or volume disturbance after target molecules are bound is enhanced, and the detection sensitivity is improved. The specificity and the detection stability are greatly improved, and through system comparison, MC-LR and MC-RR can be synchronously detected through change analysis of electric signals.

The application discloses a preparation method of a photochromic molecule / alumina nanoporous membrane and application thereof, and belongs to the field of nanometer material detection. The nanopore of the alumina nanoporous membrane is an array structure with one open end, one sealed end and a nanometer channel in the middle. The sealed end is a barrier layer of the alumina nanoporous membrane and exhibits a hexagonal close-packed hemispherical protrusion array structure in the microstructure. Photochromic molecules are grafted on the open end of the alumina nanoporous membrane and the inner wall of the channel in the middle. When a spiropyran is used as the photochromic molecule, the prepared spiropyran / alumina nanoporous membrane can be controlled to be an inert reactor and an active reactor of SO2 through remote light control to construct a demand detector capable of long-term storage and real-time detection, and quantitative analysis of SO2 can be realized by monitoring the rectified current, which provides a brand-new idea for design and reliable detection of other demand nanofluidic sensing devices.

The application discloses a kind of nanometer porous membrane materials for reducing the content of Ag / Au / Pt in electronic grade sulfuric acid and preparation method, the nanometer porous membrane material uses N-methyl pyrrolidone as solvent, polyvinylidene fluoride as polymer, glass fiber, graphite powder as additive, with sulfonated graphene oxide as chemical adsorption complexing agent, it is configured into stable film liquid with suitable viscosity for blade coating, and PVDF / SGO nanometer porous membrane material is obtained by blade coating.The application can effectively solve the problem of high content of specific metal ion impurities in the existing high-purity sulfuric acid purification by preparing a new type of superabsorbent material-PVDF / SGO nanometer porous membrane material, especially for Ag, Au, Pt metal ion removal capacity is high.

The invention discloses a micro-fluidic chip for capturing exosomes as well as a preparation method and a use method of the micro-fluidic chip, and belongs to the technical field of biomedical detection and micro-nano processing. The chip adopts a multi-layer composite structure formed by sequentially stacking an upper clamp layer, an upper micro-channel layer, a functional nano composite film layer, a lower micro-channel layer and a lower clamp layer from top to bottom; the inner surface of the upper micro-channel layer is provided with a capture channel containing a periodic herringbone microstructure, and the inner surface of the lower micro-channel layer is provided with a blank channel; the functional nano-composite film layer is clamped between the upper layer and the lower layer and is made of a polycarbonate track etching nano-porous film of which the surface is covalently modified with TIM4 protein. The principle of tangential flow filtration and immunoaffinity capture is combined, efficient and high-specificity capture of the exosome is achieved, and mild and reversible release of the exosome can be achieved through EDTA chelation. The device has the advantages of high capture efficiency, simplicity and convenience in operation, low cost and the like, and is suitable for separation and purification of exosomes in the field of biomedicine.

Provided is a method of controlling local release of target compounds by patterning a hydrogel carrying a bone morphogenetic protein or anticancer drug as the target compounds onto an electrospun nanoporous membrane. The hydrogel is capable of controlling local release of the bone morphogenetic protein or anticancer drug as a carrier of the bone morphogenetic protein or anticancer. And the electrospun nanoporous membrane performs a basic function of the membrane of preventing infiltration of connective tissue. Thus, there is an advantage in that the hydrogel patterned nanoporous membrane can facilitate generation of controlled bone in a local region and degradation of cancer in a local region.

A method is described whereby a thin, self-assembled ionic liquid layer (SAILL) is produced through careful consideration of surface functionalization of a nanoporous membrane and solution additions. As an example, an EMIM-TFSI ionic liquid layer was produced in the nanopores of a selectively functionalized alumina membrane. The membrane surface functionality controls where the SAILL is located and ultimately, its thickness.

Multilayer electroactive reflective module, system and associated manufacturing method The invention relates to a multilayer electroactive reflective module (1) for an automotive part (4), the module (1) comprising a substrate (10), a multilayer stack (18) disposed on the first substrate (10) and configured to reflect a light beam (2') having a determined wavelength depending on a potential difference applied to the stack (18), a first electrode (12) and a second electrode (13) configured to apply the potential difference, the multilayer stack (18) comprising an electroactive layer (15), configured to form by Fabry-Pérot effect the reflected light beam (2'), a metallic mirror (14) comprising a nanoporous membrane (140) and a metallic film (142) covering the nanoporous membrane (140), a layer based on a solid polymer electrolyte (16), and a layer forming a counter electrode (17).Figure for the abridged version: Fig.1.