948 results about "Porous membrane" patented technology

The invention belongs to the technical field of preparation of diaphragm materials, and particularly relates to a preparation method of a polymer porous membrane, the polymer porous membrane and application. The method comprises the following steps: (1) obtaining a film containing a polymer and a plasticizer; (2) extracting the plasticizer in the thin film by adopting an extracting solution to obtain a wet film; and (3) the wet film is dried, and in the drying process, the size shrinkage rate of the wet film in the TD direction ranges from 5% to 20%. The polymer porous membrane prepared by the method has high-temperature dimensional stability and good air permeability and thickness uniformity.

Provided is a porous separator selected from (a) to (c). (a) Porous membranes containing hydrophilic inorganic particles, an aromatic porous support, and an organic polymer including a hydrophilic organic polymer that has a sulfo group and / or a carboxy group and has an acid value of 0.3 mmol / g or higher; (b) porous membranes containing no porous support and containing hydrophilic inorganic particles and an organic polymer including a hydrophilic organic polymer that has a sulfo group and / or a carboxy group and has an acid value of 0.3 mmol / g or higher, the hydrophilic inorganic particle content of said porous membranes being 10 mass% or greater; (c) porous membranes containing no hydrophilic inorganic particles and containing an aromatic porous support and an organic polymer including a hydrophilic organic polymer that has a sulfo group and / or a carboxy group and has an acid value of 0.3 mmol / g or higher.

The invention discloses a screen cloth enhanced polybenzimidazole porous membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: fully mixing polybenzimidazole, a polar solvent and a template to obtain a mixed solution, coating a base material with the mixed solution, placing a polymer mesh on the previous base material, and carrying out in-situ compounding, polar solvent removal and film formation to obtain a compact mesh reinforced polybenzimidazole film; and then carrying out in-situ etching treatment to prepare the screen cloth enhanced polybenzimidazole porous membrane. The size and connectivity of ion channels in the membrane can be regulated and controlled by regulating and controlling the type and content of templates in the membrane casting process, and the polybenzimidazole porous layer can be ultrathin by combining the effect of enhancing the mechanical property of the polymer mesh cloth, so that the mass transfer resistance of the polybenzimidazole porous separation layer is remarkably reduced, and the performance of the membrane is improved. The mesh-reinforced polybenzimidazole porous membrane has good dimensional stability and pore uniformity, and has the characteristics of high ion selectivity, high ion conductivity and high stability.

The invention provides an electrochemical biosensor based on ultrasonic bidirectional driving and a detection method, and belongs to the technical field of biosensing. The sensor comprises a porous membrane and an ultrasonic bidirectional driving unit, and a probe capable of specifically capturing a target object is fixed in a pore channel of the porous membrane; the ultrasonic bidirectional driving unit is composed of a first ultrasonic transducer and a second ultrasonic transducer which are symmetrically arranged on the two sides of the porous membrane, and can synchronously execute reverse power gradient change to form alternately changing pressure difference on the two sides of the membrane so as to drive liquid to repeatedly penetrate through the porous membrane. The detection method comprises the steps of to-be-detected liquid injection and ultrasonic bidirectional driving, ultrasonic auxiliary cleaning and electrochemical detection. The problems of insufficient probe utilization rate, low mass transfer efficiency and non-specific adsorption of a traditional passive diffusion mechanism are solved by utilizing bidirectional ultrasonic active driving force, the detection sensitivity, speed and signal-to-noise ratio are remarkably improved, and the method is suitable for rapid and high-sensitivity quantitative analysis of various analytes.

The invention belongs to the technical field of water purification materials, and particularly relates to a multifunctional water purification gel material and a preparation method thereof. The composite material consists of an outer-layer film, a middle-layer framework and an inner-layer carbon core, the outer-layer film is prepared from the following raw materials: sodium alginate, carboxymethyl starch, NaCl and Tween-20; the middle-layer framework is prepared from the following raw materials: chitosan, modified sodium bentonite and Fe-P nano powder; the inner-layer carbon core is prepared from the following raw materials: rice hull biochar, nano CaCO3, FeCl3. 6H2O and FeSO4. 7H2O. Efficient water purification is achieved through a three-layer synergistic structure, and the outer layer Ca < 2 + > cross-linked sodium alginate / carboxymethyl starch porous membrane intercepts particles and buffers metal ions; the middle layer is integrated with chitosan to chelate heavy metals, CTAB-bentonite electrostatically adsorbs anions and Fe-P nanoparticles to precipitate phosphate / arsenate; and the biochar-Fe3O4 complex on the inner layer provides deep adsorption and catalytic oxidation functions.

The invention belongs to the technical field of biological culture, and particularly relates to a three-dimensional dynamic biological culture device and method. The three-dimensional dynamic biological culture device comprises: a culture chamber unit, which comprises a porous membrane and a chamber body with a first opening, the porous membrane and the chamber body are detachably enclosed to form a first chamber, and the first chamber can accommodate a curable culture medium for providing a growth space for culturing cells; the flow path plate unit comprises a base part, the base part is provided with a circulation groove and a liquid storage opening matched with a liquid storage device storing a culture solution, and the liquid storage opening is communicated with the circulation groove; a plurality of mounting ports which can be matched with the culture room units are formed in the circulating groove and are used for communicating the first chamber with the circulating groove through the porous membrane; and the driving unit and the circulating groove form a circulating loop so as to drive the culture solution in the circulating groove to flow in the plurality of culture room units. According to the invention, dynamic culture of three-dimensional cells, cell spheres and organoid cells can be better realized.

The invention discloses a composite solid electrolyte layer, a preparation method and application, the composite solid electrolyte layer comprises a porous membrane laminated on a negative pole piece, and pores in the porous membrane and gaps between the porous membrane and the negative pole piece are filled with in-situ generated polymers. Inorganic solid electrolyte is also dispersed in the porous membrane, and lithium salt is dispersed in the polymer and the porous membrane. The composite solid electrolyte layer is obtained through in-situ polymerization of a polymer in pores in the porous membrane and gaps between the porous membrane and the negative electrode plate, and a novel interface structure with the electrode-electrolyte integration characteristic is constructed. By adopting a collaborative optimization strategy of a polymer matrix and inorganic filler double-crosslinking network system and an interface stable layer, the volume effect problem of a silicon-based negative electrode, the electrolyte interface impedance problem and the battery safety problem can be solved at the same time, so that the cycling stability and the rate capability of the lithium ion battery are remarkably improved.

The invention relates to the field of enhanced intrinsic safety in a gas-liquid phase mixing process, and discloses a gas-liquid mixing device and a gas-liquid mixing vaporization method. The device comprises a shell, a Venturi gas-phase turbulent mixing section, a liquid-phase atomizing mixing section and a static mixing section are sequentially arranged in the shell in the flowing direction of material flow, the Venturi gas-phase turbulent mixing section comprises a reducing structure and an expanding structure, a liquid inlet component is arranged at the position, close to the reducing structure, of the expanding structure, and the static mixing section is connected with the liquid inlet component. The liquid phase atomization mixing section is provided with a membrane tube base body, the membrane tube base body is provided with a plurality of inner holes in the axial direction, the surfaces of the inner holes are coated with nanometer materials, and the static mixing section is provided with filler. According to the device, the liquid-phase oxidizing agent and the gas-phase oxidizing agent are subjected to multi-stage mixing vaporization, the atomization degree of the liquid phase is increased, the uniformity degree of the obtained mixed gas phase is improved, meanwhile, the device can be quenched after burning explosion by coupling a porous membrane pipe and filler, and the burning explosion risk in the mixing vaporization process is reduced.

The invention belongs to the technical field of lithium metal batteries, and relates to preparation of an ultrathin polymer electrolyte with a wide electrochemical window and application of the ultrathin polymer electrolyte in a solid-state lithium metal battery, a preparation method comprises the following steps: firstly, coating a substrate with polymer slurry, and then soaking, stripping and drying to obtain a porous membrane matrix; the preparation method comprises the following steps: mixing an electrolyte, a conductive lithium salt, a cross-linking agent, 4-fluorine-alpha-methyl styrene and an initiator to obtain an electrolyte precursor solution; and then supporting the electrolyte precursor liquid on the porous membrane substrate, and carrying out in-situ polymerization and curing to obtain the polymer electrolyte. Compared with the prior art, the thickness of the polycarbonate solid electrolyte is 7.8 microns, and the polycarbonate solid electrolyte shows high room-temperature ionic conductivity, a wide electrochemical window and excellent dendritic crystal resistance. And the corresponding 4.5 V high-voltage LiLCO solid-state battery can stably circulate for 1500 circles at room temperature. The electrolyte is ultrathin, the preparation process is simple, the scale is easy to enlarge, and the electrolyte shows a good practical application prospect.

A device and method for assembling objects by generating an axial acoustic radiation force in order to position the objects on pressure nodes and / or antinodes and generating a transverse acoustic radiation force in order to move the thus positioned objects on a porous membrane contact structure.

The invention discloses a method for producing formic acid by reducing carbon dioxide through a hydrogen-driven hollow fiber catalytic membrane reactor, and relates to the technical field of carbon dioxide resource utilization. In order to solve the problems of low formic acid product selectivity, low CO2 conversion efficiency and high cost in the prior art, hydrogen is used as the only energy source, and a hollow fiber non-porous membrane is utilized to realize bubble-free efficient mass transfer of H2 to form a compact hydrogen-rich layer on the surface; the nano-metal particle catalyst loaded on the surface of the membrane synergistically activates hydrogen at a gas-liquid-solid three-phase interface to generate active hydrogen atoms, and CO2 transferred in a dissolved state or a gas phase is subjected to directional catalytic reduction to form formic acid with high selectivity. The method is operated at normal temperature and normal pressure, so that the H2 utilization efficiency and the CO2 mass transfer efficiency are remarkably improved, and the byproduct separation cost and the operation energy consumption are effectively reduced; the produced formic acid can be used as an important chemical raw material and intermediate, an excellent liquid hydrogen storage carrier, a formic acid fuel cell fuel and a microbial carbon source, and has wide application value.

The invention discloses a wafer cleaning device based on ultrasonic cleaning, and relates to the technical field of wafer cleaning devices. Comprising a cleaning machine outer tank body, a wafer cleaning glass tank, an ultrasonic cleaning tank, an ultrasonic device, a bottom plate, a housing, a cleaning tank rail, a flow dividing water supply device and a bubble removing uniform vibration device, ultrapure water serves as a medium, ultrasonic vibration is effectively conducted to the wafer cleaning glass tank, a strong acid solution in the tank is driven to uniformly vibrate, and efficient cleaning of wafers is achieved. High turbulence pulsation and local shearing stress are formed at the junction of oblique water replenishing and the stock solution, large bubbles are sheared into small bubbles, bubble gathering is prevented, and the liquid purity and the ultrasonic cleaning efficiency are improved. Under the centrifugal separation action of the rotational flow connecting base and the annular rotational flow piece, bubbles in water flow are concentrated in the center position, ultrapure water on the outer side is rapidly discharged, the bubbles are efficiently absorbed after making contact with the hydrophobic porous membrane, and the bubble removing effect is remarkably improved.

The embodiment of the invention relates to a porous Mylar membrane which is suitable for a battery structure and comprises a membrane body and a plurality of pores formed in the membrane body, the porosity of the plurality of pores is 10%-50%; and the plurality of pores are uniformly distributed or distributed in a gradient manner. According to the porous Mylar film, the surface area of the film is greatly increased, efficient heat dissipation channels are formed, meanwhile, the electrolyte filled in the pores is also beneficial to heat transfer and diffusion, heat generated in the working process of a battery can be dissipated more timely, and the heat dissipation efficiency can be improved by 10%-50% compared with the prior art. According to the invention, the rising of the internal temperature of the battery can be effectively controlled, the stable performance of the battery is effectively maintained, the performance degradation and safety risk of the battery caused by overheating are reduced, and the service life of the battery is prolonged. The battery is simple in structure, the weight of the battery is reduced, the energy density of the battery is increased, and the liquid retention capacity of the battery is also effectively improved.

The invention provides a cation exchange membrane chromatography medium and a preparation method and application thereof, the cation exchange membrane chromatography medium comprises a homo-porous membrane, polydopamine is loaded on two side surfaces and in a pore structure of the homo-porous membrane, and a cation exchange functional ligand is grafted on the polydopamine; a homogeneous pore membrane is selected as a matrix membrane, polydopamine is loaded on the surface and in an internal pore structure of the homogeneous pore membrane, and then a cation exchange functional ligand is further grafted, so that the surface of a chromatography medium of the obtained cation exchange membrane has relatively strong negative charges, and biomolecules with positive charges can be effectively adsorbed, thereby being separated from biomolecules with negative charges; meanwhile, the membrane is relatively low in transmembrane pressure and relatively high in separation degree, also has the characteristics of high permeability and high selectivity, and is suitable for being applied to separation and purification of biological drug macromolecules.

The invention relates to a nanofiber membrane and a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing polyurethane, nano lanthanum oxide, a waterproof agent and a solvent to obtain a spinning solution; (2) performing electrostatic spinning on the spinning solution to obtain an electrostatic spinning membrane; and (3) spraying the after-finishing liquid on the electrostatic spinning membrane, and then carrying out heating treatment to obtain the nanofiber membrane. Polyurethane is stretched into superfine fibers through an electrostatic spinning technology, an ultrahigh porous membrane similar to a spider web is prepared, billions of nanopores are formed in per square centimeter of the porous membrane, so that the porous membrane has high air permeability and waterproof and moisture-permeable performance, fibers are bound through a fiber bonding point technology, and the fiber bonding point technology is adopted, so that the waterproof and moisture-permeable performance of the membrane is improved. Therefore, the fabric has excellent washing resistance. The nano lanthanum oxide heating functional particles are added, so that the nanofiber membrane is endowed with heating and heat storage functions, and the washing resistance of the fabric is further improved.

The invention discloses a double-chamber micro-fluidic organ chip, a preparation method and application, and belongs to the technical field of biological materials. The double-chamber micro-fluidic organ chip sequentially comprises a top layer, an upper layer, a middle layer and a lower layer from top to bottom, cavities are formed in the upper layer and the lower layer, and micropore arrays for accommodating biological samples are arranged in the cavities; the chip further comprises a plurality of circulation channels which can be respectively communicated with the upper layer chamber and the lower layer chamber, so that a biological sample enters and exits from the micropore array; and the middle layer is a semi-permeable porous membrane. The micro-fluidic organ chip can be used for establishing a metabolic disease model, promoting interaction between organs and realizing space-time dynamic change analysis of tissues and organs.

The utility model discloses an aeration membrane tube and a hoisting type aeration system. The aeration membrane tube comprises an air inlet joint, a supporting tube and a porous membrane tube, the supporting pipe is connected with the air inlet connector, the supporting pipe and the air inlet connector form an air distribution chamber, the air distribution chamber is separated from an inner cavity of the supporting pipe, and an opening for communicating the inner cavity of the supporting pipe with the outside is formed in the tail end, away from the air inlet connector, of the supporting pipe. The porous membrane tube is sleeved outside the supporting tube, at least one end of the porous membrane tube is annularly fixed through a clamp, a gap between the porous membrane tube and the side wall of the supporting tube forms an inflation space, and an air inlet communicated with the inflation space is formed in the side wall of the air distribution chamber. The buoyancy of the air cavity during aeration is counteracted by utilizing gravity, the aeration membrane tube does not need to be fixed by adopting a fixing bracket, the mounting process is simplified, the cost is reduced, the aeration membrane tube is hoisted and fixed, the relative levelness of the aeration membrane tube can be controlled at the top of the tank, the same aeration water depth and aeration uniformity are ensured, and the aeration efficiency is improved. And the aeration system can be mounted and overhauled outside the tank body.

The invention relates to the related field of alkaline water electrolysis hydrogen production, in particular to a cobalt manganese oxide catalyst-nonporous anion exchange membrane composite system stable in high-temperature alkaline environment, which comprises a cobalt manganese oxide nanosheet and a quaternized polyarylene ether nitrile nonporous membrane, the metal molar ratio of Co to Mn of the cobalt manganese oxide is 1: 1-3: 1, and the metal molar ratio of the cobalt manganese oxide nanosheet to the quaternized polyarylene ether nitrile nonporous membrane is 1: 1-3: 1. After acid etching, the oxygen vacancy concentration is 0.2-0.5 mmol / g, and the specific surface area is 120-180m < 2 > / g; the quaternization degree of the non-porous membrane is 70-90%, the conductivity at 80 DEG C is greater than or equal to 100mS / cm, and the swelling rate in 10MKOH is 1t; 5%. According to oxygen vacancies (0.2-0.5 mmol / g) and high specific surface area (120-180 m < 2 > / g) formed after cobalt manganese oxide in the composite system is subjected to acid etching, the number of catalytic active sites is remarkably increased, an electronic structure (for example, the ratio of Co < 3 + > is increased) is optimized, the OER overpotential is as low as 210-230 mV under 10 mA / cm < 2 >, the Tafel slope is smaller than or equal to 38 mV / dec, and the charge transfer resistance is smaller than or equal to 20 omega, which are far superior to those of an unetched catalyst and a traditional system; and the water electrolysis oxygen evolution reaction rate is accelerated.

A composite ion exchange membrane, a preparation method therefor and a use thereof, and a zinc-iodine flow battery. By introducing halogen adducts onto a porous membrane, a composite membrane based on a series of localized high iodine concentration (LHIC) coatings is constructed to suppress the problem of crossover of active polyiodide compounds in a catholyte. Specifically, metal oxides exhibit a strong physicochemical adsorption effect toward halogens, and halogen oxide adducts are formed, the halogen oxide adducts becoming effective halogen carriers. An LHIC coating is constructed on the porous membrane by utilizing the strong adsorption characteristic of the carriers and halogen (such as iodine), thereby enhancing the selectivity of the porous membrane toward iodine species. On the basis of Donnan exclusion and concentration gradient effects, a constructed localized high-concentration membrane can effectively suppress the diffusion of halogens from a positive electrode in a zinc-iodine battery / zinc-bromine battery, mitigating the problem of capacity loss of a zinc-iodine / zinc-bromine flow battery, and achieving long-term cyclic stability.

To provide a fluid filtration treatment method which prevents a failure of filtration and a remarkable decrease in filtration speed, even when filtration of fluid is performed at high temperature, and a porous film which is preferably used in the filtration treatment method.SOLUTION: In a filtration treatment method for filtering fluid at 25°C or higher by a porous film, a polyimide resin porous film which has a communication hole and an average pore size of 0.3 μm or more, or a polyamide-imide resin porous film is used as a porous film.SELECTED DRAWING: None

Polymeric porous membranes, filter containing, and methods of making the polymeric membranes the same are disclosed. The polymeric porous membrane has a first major membrane surface and a second major membrane surface opposite of the first major membrane surface, and a first layer proximate the first major membrane surface, the first layer including a first plurality of pores having a first average pore size. The membrane includes a second layer comprising a second plurality of pores having a second pore size. In some cases, the membrane includes a third layer comprising a third plurality of pores having a third pore size.

The utility model relates to the technical field of biological chips, in particular to a multi-tissue co-culture organoid chip which comprises a chip main body, and a plurality of culture hole groups are formed in the chip main body; the culture hole group comprises a first cell culture hole and at least one second cell culture hole communicated with the first cell culture hole, and a porous membrane for cells to pass through is arranged at the communicated part of the first cell culture hole and each second cell culture hole; the mode that the two cell culture holes are communicated and separated through the porous membrane is adopted, organoid co-culture is achieved, meanwhile, the pathological and physiological dynamic microenvironment of tumor tissue can be simulated, the operation process of medicine screening is simplified, and the medicine screening efficiency is greatly improved.

The application discloses a wafer cleaning device based on ultrasonic cleaning and relates to the technical field of wafer cleaning devices. The wafer cleaning device comprises a cleaning machine outer tank body, a wafer cleaning glass tank, an ultrasonic cleaning tank, an ultrasonic device, a bottom plate, a cover, a cleaning tank track, a shunt water supply device and a bubble removing uniform vibration device. The application effectively conducts ultrasonic vibration to the wafer cleaning glass tank by taking ultrapure water as a medium, drives the strong acid solution in the tank to uniformly vibrate and realizes efficient cleaning of the wafer. The oblique water replenishment forms high turbulent pulsation and local shear stress at the junction with the original liquid, shears large bubbles into tiny bubbles, prevents bubble aggregation, improves liquid purity and ultrasonic cleaning efficiency. The centrifugal separation effect of the cyclone connecting seat and the annular cyclone sheet makes the bubbles in the water flow concentrate at the center position, the outer ultrapure water is quickly discharged, the bubbles are efficiently absorbed after contacting the hydrophobic porous membrane, and the bubble removing effect is significantly improved.

The invention provides a skin fibrosis in-vitro model as well as a construction method and application thereof, and relates to the technical field of cell biology. According to the skin fibrosis in-vitro model construction method, a full-thickness skin model with an epidermal layer and a corium layer is constructed by utilizing a cell culture chamber or a cell culture micro-fluidic chip, and the skin fibrosis in-vitro model is obtained by performing induced culture through a chemical reagent, a growth factor or mechanical stress while the corium layer is constructed. According to the construction method, the problem that an existing in-vitro model can only reflect early-stage fibrosis skin characteristics and cannot effectively simulate fibrosis skin formed under the condition of a long disease course is solved. Besides, the corium layer and the epidermal layer in the full-thickness skin structure are not separated, isolated and differentiated through a porous membrane, corium layer fibrosis can generate more direct influence on the epidermis, richer inflammatory factor expression change of the whole model is obvious, and the simulation degree of skin fibrosis diseases is higher.

The invention belongs to the technical field of radiation refrigeration, and discloses a modified PVDF and HFP composite porous membrane and a preparation method thereof. The modified PVDF and HFP composite porous membrane comprises a substrate layer, a porous bottom layer and a compact top layer. Wherein the porous bottom layer is prepared from acetone, deionized water, a PVDF-HFP copolymer, a mixed dispersion liquid and a modified nanosheet dispersion liquid; the compact top layer is prepared from acetone, deionized water, a PVDF-HFP (Polyvinylidene Fluoride-Hexafluoropropylene) copolymer, synergistic microspheres and a modified nanosheet dispersion liquid; the mixed dispersion liquid is prepared from acetone, silicon carbide, synergistic microspheres and polyvinylpyrrolidone. The radiation refrigeration capacity, hydrophobicity, dimensional stability and aging resistance of the modified PVDF and HFP composite porous membrane are effectively improved by introducing the modified nanosheet dispersion liquid and the synergistic microspheres. Therefore, the method has a wider application prospect.

Disclosed is a method for manufacturing a separator having a polymer adhesive layer. The method includes preparing an aqueous polymer slurry comprising a particulate binder polymer having a glass transition temperature Tg of 20° C. or more and a particle size D50 of 300 to 800 nm, a wetting agent, and a particulate acrylic binder polymer having a glass transition temperature Tg of −10° C. or less and a particle size D50 of 100 to 200 nm, and coating the aqueous polymer slurry on at least one surface of a polyolefin-containing porous membrane having pores and drying the aqueous polymer slurry.

The invention discloses an electrochemical biosensor for detecting mycobacterium tuberculosis. The sensor takes a porous membrane as a base material, the inner wall of a pore channel of the porous membrane is co-modified with a polydopamine (PDA) and conductive carbon material composite layer, and an amino-modified specific capture probe based on a mycobacterium tuberculosis ESAT-6 gene is fixed on a modification layer through covalent binding. When a target gene is captured by a probe, the volume effect of the target gene causes blockage of a porous channel of the porous membrane, so that electrochemical signals (such as current) of the sensor are changed, and high-sensitivity and specific detection of mycobacterium tuberculosis is realized. According to the invention, a porous structure, biological probe specific fixation and an electrochemical signal conversion technology are combined, and a novel efficient tool is provided for rapid diagnosis of tuberculosis.

A lysis capsule for performing a cell lysis procedure includes a hollow body having an open first end and an open second end, a first porous membrane covering the open first end, and a second porous membrane covering the open second end, and the hollow body defines a lysis chamber between the first and second porous membranes. A plurality of non-magnetic beads and at least one magnetic element are disposed within the lysis chamber, and the pores of the first and second porous membranes are sized to retain the non-magnetic beads and the magnetic element within the lysis chamber. An internal control may be contained within the lysis chamber to validate an assay result and / or to validate the effectiveness of the cell lysis procedure. The lysis capsule may be disposed within a sample chamber of a fluidic cartridge.

Provided are: an ion exchange membrane which has low membrane resistance and strong toughness that does not easily cause breakage of the membrane even when assembled in a water electrolysis device; a polyolefin-based porous membrane that can be used as a support for the ion exchange membrane; and a method for producing the polyolefin-based porous membrane. An ion exchange membrane which comprises a porous support and an ion exchange resin filled in the voids of the porous support, and which has a tear strength of 3.5 N or more in each of the MD direction and the TD direction.

A sorbent device based on a porous membrane bag (e.g., porous propylene membrane bag) encapsulated alkaline-modified zeolite (e.g., alkaline-treated USY zeolite). A process for removing heavy metals, such as Cd(II), Cr(III), and Pb(II) from an aqueous solution or an industrial wastewater samples with the sorbent device is provided. A method for preparing the alkaline-modified zeolite is also described.