31 results about "Nanoporous membrane" patented technology

A multimodal measurement device comprises a split analyte sensor layer, a seal layer above the sensor layer, configured to divide the sensor layer into two or more detection zones, including a detection channel associated with each detection zone, a membrane holding layer above the seal layer, comprising a holder for a nanoporous membrane chip, and delivery channels fluidly connecting two or more surfaces of the chip to the two or more detection zones of the sensor layer via the detection channels, and a cap layer above the membrane holding layer, comprising a plurality of application channels including input and output ports, wherein the application channels are fluidly connected to chip via the delivery channels of the membrane holding layer. Related systems and methods are also disclosed.

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 invention belongs to the technical field of nano material detection and application, and particularly relates to a probe-modified functionalized two-dimensional nanopore membrane and a preparation method and application thereof.The probe-modified functionalized two-dimensional nanopore membrane comprises a graphene oxide two-dimensional nanopore membrane and a crown ether probe on the graphene oxide two-dimensional nanopore membrane, according to the graphene oxide two-dimensional nanopore membrane, after flaky graphene oxide non-methylated polypeptide with carboxyl on the surface penetrates through the prepared probe-modified two-dimensional functionalized nanopore membrane and is combined with a probe through a hydrogen bond, a pore channel is blocked to cause current change, but methylated polypeptide is not combined with the probe and passes through the pore channel; therefore, the purpose of enriching methylated polypeptide is achieved. The driven solution is collected, the eluent of the functionalized two-dimensional nano-pore membrane is subjected to mass spectrum testing, methylated polypeptide is found in the driven solution, non-methylated polypeptide is found in the eluent of the functionalized two-dimensional nano-pore membrane, and therefore the enrichment effect of the functionalized two-dimensional nano-pore membrane is verified.

This invention is for membranes with precision nanopores (also known as precision nanopore membranes or PNM) offering exceptional permeability and selectivity for separation of gas mixtures. Other applications include microfiltration. The subject PNM has high precision nanopores directly connecting the opposite sides of the membrane, thus avoiding a torturous path fort gas transport of prior art nanoporous membranes. Pores are oriented generally perpendicular to the membrane surface and may occupy a large fraction of membrane surface area. This beneficially offers reduction in membrane thickness and reduced operating pressures. This arrangement offers allow extreme reduction in membrane thickness ensuring high permeability and low driving pressures. The PNM allow for a simplified construction of the separator and a process with much reduced energy consumption compared to current commercial practice.

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.

The invention discloses a preparation method of a dry-process single-pull separator, comprising the following steps: (1) feeding: after pre-treatment of the raw materials, the raw materials are transported to an extrusion system; (2) casting: the pre-treated raw materials are melt-plasticized in the extrusion system and then extruded from a die head to form a melt having a specific crystalline structure after casting; (3) heat treatment: the base film is heat-treated to obtain a hard elastic film; (4) compounding: the hard elastic film is cooled and then laminated and compounded; (5) stretching and shaping: the composite film is stretched, retracted and shaped to form a nanoporous membrane; (6) layering: the nanoporous membrane is layered through a layering device to obtain a nanoporous membrane of a target thickness, and the peeling angle during layering is 45-75 degrees; (7) slitting: the nanoporous membrane is cut into finished films. The preparation method can improve the stability of the layering process, so that the yield of the product is high, and the assembly short-circuit rate of the product is low when it is subsequently used for battery assembly.

A microbial power generation device according to the present invention comprises: an anode chamber that holds microorganisms and receives a supply of raw water that includes an organic substance that is an electron donor; and a cathode chamber that is partitioned from the anode chamber by an ion-permeable but non-electroconductive nanoporous or sub-nanoporous film and receives a supply of an oxygen-containing gas an electron acceptor. The microbial power generation device is characterized by comprising a circulation passage that recycles some anode chamber outflow water and supplies the anode chamber outflow water to the anode chamber.

The application discloses a composite membrane material for reducing the content of Au / Ag / Pt / Ni / Bi in electronic-grade sulfuric acid and a preparation method thereof. The composite membrane material comprises a PVDF / SGO nanoporous membrane material and a PVDF / GO electrostatic spinning membrane material which is compounded on the surface of the nanoporous membrane material. The nanoporous membrane material is prepared by using N-methyl pyrrolidone as a solvent, polyvinylidene fluoride as a polymer, glass fiber and graphite powder as additives, and SGO as a complexing agent, and then being coated by a blade coating method to obtain the PVDF / SGO nanoporous membrane material. The electrostatic spinning membrane material is prepared by using N,N-dimethylformamide as a solvent, polyvinylidene fluoride as a polymer, and graphene oxide as a complexing agent, and then being spun to obtain the PVDF / GO electrostatic spinning membrane material. The composite membrane material can effectively solve the problem of high content of specific metal ion impurities such as Au, Ag, Pt, Ni and Bi in the existing high-purity sulfuric acid purification.

A functionalized microporous, mesoporous, or nanoporous membrane, material, textile, composite, laminate, or the like, and / or a method of making or using such functionalized membranes. The functionalized porous membrane may be a functionalized microporous, mesoporous, or nanoporous membrane that has a functional molecule attached, such as a functional polymer, to the surface and / or internal fibrillar structure of the membrane.

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 invention discloses a construction method of a polycarbophil calcium tablet enhanced anti-diarrhea self-adaptive release system. According to the method, calcium polycarbophil and an ion-exchangeable multivalent metal salt carrier are treated under controlled humidity to form a microporous structure, so that the calcium polycarbophil and the ion-exchangeable multivalent metal salt carrier can be replaced and released by monovalent cations in intestinal fluid. The obtained pretreated component and a biodegradable porous polymer matrix are mixed and pressed at low temperature, and pH responsive microcapsules are distributed in the matrix. A composite blocking layer cross-linked by hydrophilic and hydrophobic polymers is formed on the surface of the matrix, so that the expansion rate of the composite blocking layer dynamically changes along with local pH; the outer layer is provided with a controllable degradation nano-porous membrane, and the pore size distribution is reconfigured under the induction of the ion concentration gradient. After constant-temperature and constant-humidity compaction treatment, the obtained system shows a self-adaptive release curve in an in-vitro simulation experiment, and delayed effect and stable release can be realized under different individual intestinal tract conditions. According to the method, the treatment effect of the anti-diarrhea medicine is remarkably improved through a multi-response mechanism.

The disclosure provides a device for sustained release of a therapeutic agent, comprising a capsule configured for implantation and having a reservoir; a nanoporous membrane with a plurality of pores; the therapeutic agent disposed within the reservoir; wherein the nanoporous membrane provides a diffusion path for the therapeutic agent out of the reservoir; and the device further comprising an anti-inflammatory agent.

This invention relates to the field of electrochemical sensing, specifically disclosing an electrochemical aptamer sensor for detecting mycotoxins in agricultural products, its preparation method, and detection method. The sensor includes a working electrode, a reference electrode, and a counter electrode modified with a silica nanoporous membrane. The detection solution contains a composite probe of graphene oxide-mycotoxin aptamer-hexaammineruthenium trichloride. This invention uses hexaammineruthenium trichloride and mycotoxin aptamers as the electrochemical signal molecule and specific recognition element, respectively. They are adsorbed onto the surface of graphene oxide through electrostatic interactions or π-π interactions, forming the graphene oxide-mycotoxin aptamer-hexaammineruthenium trichloride composite probe. Combined with the signal amplification effect of the silica nanoporous membrane, the constructed homogeneous electrochemical aptamer sensor exhibits high detection sensitivity, a wide detection linear range, and a low detection limit, showing significant application potential in the field of food safety monitoring.

The present invention relates to a process for the manufacture of nanoporous carbon membranes, membranes obtainable by this process, methods for gas separation using these membranes and the use of such membranes.

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 invention discloses preparation and application of an anionic covalent organic framework film material, and belongs to the field of preparation of environment-friendly separation materials. Comprising the following steps: 1, soaking an AAO support body in deionized water for 1 hour at room temperature; 2, taking out the soaked AAO support body, and airing; 3, accurately weighing two construction monomers, namely 2, 5-diaminobenzene sulfonic acid and 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde, adding a mixed solvent, namely dimethyl sulfoxide and N-methyl pyrrolidone, and carrying out ultrasonic treatment for 15 minutes, so that the two monomer powders are completely dissolved to form a homogeneous solution; 4, placing an AAO substrate at the bottom of the reaction solution, and carrying out a hydrothermal reaction; 5, fishing out the AAO substrate to obtain a COF film with complete morphology; 6, acetone and absolute ethyl alcohol are sequentially used for washing, standing is conducted at the room temperature, and the TpPa-SO3H / AAO nano-porous membrane is obtained. The thin film material provided by the invention has high crystallinity and good stability, and shows efficient metal ion selectivity, and the separation factor of Li < + > / Mg < 2 + > is as high as 15 in a two-component mixed system of LiCl and MgCl2.

To provide a microbial power generation device and a microbial power generation method that suppress bicarbonate deposition in a cathode chamber.SOLUTION: A microbial power generation device includes an anode chamber to which raw water holding microorganisms and containing organic matter serving as an electron donor is supplied, and a cathode chamber separated from the anode chamber by a non-conductive nanoporous or subnanoporous membrane that is ion permeable and to which an oxygen-containing gas is supplied as an electron acceptor, and the microbial power generation device is provided with a circulation flow path that circulates a portion of the anode chamber effluent water and supplies it to the anode chamber.SELECTED DRAWING: Figure 1

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.

A functionalized metal / carbon nanotube-based electrified nanoporous membrane with a cooperative nitrite-enriching component to achieve energy-efficient ammonia production from low-concentration nitrate. The use of flow-through electrofiltration reduces energy consumption and treatment time. Integrating an ionophore as a cooperative component into the conductive filtration membrane enriches nitrite within the catalyst microenvironment, enabling conversion of unreacted NO2- to NH3 to enhance overall selectivity without directly modifying the catalytic active sites.

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.

The utility model relates to the technical field of fabrics, in particular to a bio-based high-elasticity body-shaping fabric, which comprises a warp knitting body and a PLA (polylactic acid) electrostatic spinning nano microporous membrane, the PLA electrostatic spinning nano microporous membrane is compounded on the inner surface of the warp knitting body, the warp knitting body is formed by warp knitting of a guide bar GB1 and a guide bar GB2, and the guide bar GB1 and the guide bar GB2 are arranged on the warp knitting body. The guide bar GB1 adopts bio-based nylon 56 yarns to weave open tricot stitch, and the guide bar GB2 adopts spandex yarns to weave heavy warp stitch. The fabric disclosed by the utility model has the advantages of compact structure, excellent stretching resilience, good elastic recovery rate, small plastic deformation rate, air permeability, moisture permeability, water resistance, antibiosis and the like, is combined with the swimsuit fabric, can effectively protect skin and mucous membranes in complex environments such as sea swimming and swimming pools, has good biocompatibility, and can be used for effectively protecting the skin and mucous membranes. The requirements of patients after trauma and plastic surgery, patients with posture recovery in the lactation period and the like are met.