222results about How to "Increased porous structure" patented technology

Porous poly(aryl ether ketone) (PAEK) articles are prepared from PAEK/polyimide blends by selective chemical decomposition and subsequent removal of the polyimide phase. Porous PAEK articles exhibit highly interconnected pore structure and a narrow pore size distribution. The porous PAEK articles of the present invention can be utilized as a porous media for a broad range of applications, including membranes for fluid separations, such as microfiltration, ultrafiltration, nanofiltration, and as a sorption media.

Functionalized porous poly(aryl ether ketone) articles are prepared by reacting ketone groups in the backbone of poly(aryl ether ketone) polymer with a primary amine reagent. Preferred functional primary amines are primary aliphatic amines or substituted hydrazines containing one or more target functional groups including polar groups, such as hydroxyl groups, ˜OH, amino groups, ˜NH₂, ˜NHR, ˜NRR′, and ethylene oxide groups, ˜OCH₂CH₂—, negatively or positively charged ionic groups, such as ˜SO₃⁻, ˜COO⁻, and ˜NH₄⁺ groups, hydrophobic groups such as siloxane or perfluorcarbone groups, and non-polar groups, such as linear or branched hydrocarbon groups. The functionalized porous poly(aryl ether ketone) article can be prepared by reacting primary amine with a pre-formed, shaped porous poly(aryl ether ketone) article or by functionalizing the surface of a non-porous precursor article that is subsequently converted into a porous article.

The invention discloses an aluminum and aluminum alloy surface treatment method which is characterized by comprising steps as follows: water washing, degreasing treatment, water washing, pickling, water washing, alkali washing, deionized water washing, anodic oxidation, water washing, PTFE (polytetrafluoroethylene) treatment, and drying. According to the aluminum and aluminum alloy surface treatment method, an aluminum and aluminum alloy oxide film with good uniformity can be obtained, and the film is high in hardness, abrasion-resistant, corrosion-resistant and the like.

The invention discloses a method for preparing cellulose microspheres by taking ionic liquid as a solvent. The method comprises the steps of: 1) preparing cellulose solution as follows: dissolving the cellulose into the ionic liquid under low-speed stirring and proper temperature; 2) adding inert particles: adding proper amount of inert particles, and stirring evenly; 3) forming spheres by reversed phase suspension: adding oil phase and a surface active agent, leading the cellulose solution to be condensed into spheres by reversed phase suspension and program temperature reduction; 4) curving microspheres: adding a curving agent and curving to form the cellulose microspheres; 5) washing: using deionized water to wash and soak so as to obtain the cellulose microspheres; and 6) screening: screening in a wet state and obtaining the cellulose microspheres with a certain particle size range. The developed preparation process is simple and convenient, the used solvent is safe and non-toxic, the prepared cellulose micrsphere has porous structure and proper particle size, high sphericity and good hydropathy, can adjust density, can be used as substrate of an absorbent and has good biocompatibility.

A high-performance 5A molecular sieve with pressure-variable adsorption function is prepared through proportionally mixing the raw powder of 4A molecular sieve with kaolinite-type clay, adding plant fibres, granulating, sieving, baking, calcining at 200-1000 deg.C, immersing in the solution of sodium hydroxide, washing, Ca ion exchanging in CaCl2 solution, washing, baking, and calcining at 100-800 deg.C. Its advantages are high adsorption capacity, diffusing speed, and mechanical strength.

Simple, low cost methods of manufacturing highly porous structures are provided. The methods involve building up porous structures with elements shaped to provide the desired strength, porosity and pore structure of the porous structure and then sintering the elements together to form the structure. Also provided are novel sintered porous structures made up of sintered non-spherical elements. In certain embodiments, the shaped green elements and the porous structure are simultaneously sintered. Also provided are novel sintered porous structures made up of sintered non-spherical elements.

The invention discloses a cobalt-nickel-double-metal-hydroxide-nanosheet/carbon-nitride-coated nitrogen-doped hollow graphene sphere composite material and a preparation method thereof, and application as a supercapacitor electrode material. The composite material comprises a cobalt-nickel-double-metal-hydroxide-nanosheet/carbon-nitride-coated nitrogen-doped hollow graphene sphere has a 3D spherical appearance; and the specific surface area is 100 to 1000m<2>/g and the average pore diameter of 1 to 200mm. In addition, the preparation method includes the following steps: preparing a small polystyrene sphere; preparing a polyaniline-coated graphene sphere; preparing a carbon-nitride-coated nitrogen-doped hollow graphene sphere; and preparing a cobalt-nickel-double-metal-hydroxide-nanosheet/carbon-nitride-coated nitrogen-doped hollow graphene sphere composite material. Therefore, a problem of series agglomeration of the cobalt-nickel double-metal hydroxide unit structure during the traditional preparation technology process is solved effectively; and a novel method is provided for preparing an electrode material with advantages of large specific surface area, high flexibility, high electric capacity, and high stability.

The invention provides a preparation and an application of a nitrogen, sulphur or chlorine-doped three-dimensional porous graphene catalyst. The preparation comprises the following steps: dissolving graphene oxide, an alkyl compound, a transition metal salt containing nitrogen, sulphur or chlorine and hydrochloric acid into a solvent, and carrying out ultrasonic treatment and drying to obtain a precursor; heating the precursor to 600-1,000 DEG C under inert gas protection and carrying out roasting reduction treatment for 1-3 hours to obtain primary carbide; carrying out pickling treatment on the obtained primary carbide with a mixed solution of hydrofluoric acid and hydrochloric acid at a room temperature for 12-24 hours, centrifuging the primary carbide, cleaning the primary carbide with deionized water and then drying the primary carbide to obtain the three-dimensional porous graphene material containing nitrogen, sulphur or chlorine; and heating the three-dimensional porous graphene material to 600-1,000 DEG C under inert gas protection, and carrying out roasting reduction treatment for 1-3 hours to obtain the nitrogen, sulphur or chlorine-doped three-dimensional porous graphene catalyst. The nitrogen, sulphur or chlorine-doped three-dimensional porous graphene catalyst has the characteristics of being high in stability, not easy to poison and the like, and has a good application prospect in the fields of wastewater treatment of a fuel cell, a metal-air cell, a super capacitor, an energy storage battery and a microbial fuel cell and the like.

The invention relates to a foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof. The invention discloses a preparation method of a foamed nickel-basedporous NiFe hydrotalcite nanosheet. The preparation method comprises the following steps that foamed nickel is immersed into a reaction solution, wherein the reaction solution comprises bivalent nickel salt, trivalent iron salt, urea, ammonium fluoride, hydrogen peroxide and water; then a reaction is conducted at the temperature of 100-120 DEG C under the closed condition, so that the foamed nickel-based porous NiFe hydrotalcite nanosheet is obtained after the reaction is completed.

The invention provides a porous magnetic chitosan gel microsphere with controllable particle size based on an in-situ co-precipitation principle and a preparation method thereof. The preparation method comprises the following main steps: firstly, carrying out a complexation reaction on a mixed solution of Fe<2+>, Fe<3+> and chitosan to prepare precursor-induced pre-sol; secondly, dropwise dripping the pre-sol into an alkaline soaking solution containing NaOH, sodium citrate and the like for coprecipitating to generate nano-Fe3O4; thirdly, carrying out a crosslinking reaction on the pre-sol and then curing, wherein the crosslinked chitosan gel microsphere is of a porous reticular structure and the Fe3O4 is uniformly distributed in the chitosan gel microsphere. The particle size of the chitosan gel microsphere is controlled by adjusting the rotating speed of a peristaltic pump and the concentration of the solution. The chitosan gel microsphere prepared by the method has the advantages of abundant pores, large specific surface area, and high adsorption and acid resistance; in addition, the preparation method has the characteristics of simplicity, wide source in raw materials, low cost, easiness in separation and recovery, no secondary pollution and the like. The porous magnetic chitosan gel microsphere disclosed by the invention can be used for enrichment, recovery and contamination remediation of metals in mines, smelting plants, electronic factories, electroplating plants and radioactive wastewater.

The invention discloses a preparation method of a GO (Graphene Oxide)/NiCO LDHs catalytic material for detecting glucose and an electrochemical sensor. The preparation method comprises the following steps: firstly, dispersing graphene oxide (GO) into absolute methanol to obtain a graphene oxide dispersion solution; synthesizing GO@ZIF-67 by utilizing cobalt nitrate hexahydrate and dimethylimidazole; then carrying out hydrothermal synthesis on the GO@ZIF-67 and the nickel nitrate hexahydrate to obtain the GO/NiCO LDHs catalytic material; finally, dropwise adding a catalytic material solution onto a cleaned bare glass carbon electrode, so as to obtain a GO/NiCO LDHs modified electrochemical sensor. According to the preparation method, good electrochemical performance of the graphene oxide, and a porous structure and a regular shape of an MOFs (Metal Organic Frameworks) material are combined; ZIF-67 is used as a sacrificial template and oriented growth of the NiCO LDHs catalytic materialis realized; the stability of the glucose electrochemical sensor is enhanced, a detection range is expanded, the detection cost is reduced and the sensitivity of detection is improved. An enzyme-freeelectrochemical sensor makes a breakthrough of improving the analytical performance including high stability, high sensitivity and high catalytic performance and.

Disclosed are a separator and an electrochemical device including the same. The separator includes: a porous polymer substrate having a plurality of pores; a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of inorganic particles and a binder polymer disposed partially or totally on the surface of the inorganic particles to connect and fix the inorganic particles with each other; and an adhesive porous layer formed on at least one surface of the separator base and including an adhesive resin which shows adhesive property through heating at a temperature lower than the melting point of the porous polymer substrate, wherein the adhesive porous layer is provided with a porous structure formed by phase separation caused by the evaporation rate of a solvent and that of a non-solvent, when applying and drying a coating composition including the adhesive resin, the solvent and the non-solvent on at least one surface of the separator base.

The invention discloses an environment-friendly modified ASA (Acrylonitrile Styrene Acrylate) profiled bar base station antenna outer cover and a preparation method thereof. The modified ASA profiled bar base station antenna outer cover has multifunctionality and is environment-friendly, excellent in mechanical property, highly heat-resistant, excellent in dielectric properties, excellent in ultraviolet irradiation resistance and low in heat conductivity coefficient. The environment-friendly modified ASA profiled bar base station antenna outer cover disclosed by the invention is prepared from the following raw materials in parts by weight: 30-70 parts of ASA resin, 30-70 parts of alphaMSAN heat-resistant modified resin, 5-10 parts of high-rubber ASA resin, 5-30 parts of chlorinated polyethylene, 0-20 parts of acrylate impact modifier, 0.5-2 parts of lubricating agent, 1.0-1.5 parts of light stabilizer, 0.1-0.5 part of antioxidant B215, 0.5-1.0 part of heat stabilizer, 0-10 parts of titanium dioxide, 1-5 parts of surface modified porous silicon dioxide and 0.05-0.06 part of coloring agent.

The invention discloses a zeolite imidazate framework nanoparticle composite fiber film and a preparation method thereof; the method uses the static spinning technology to carry out in-situ preparation of the polymer composite fiber film containing the zeolite imidazate framework nanoparticles; the zeolite imidazate framework nanoparticles are evenly distributed in the composite fiber film, and the zeolite imidazate framework nanoparticle content in the composite fiber film is 10-15wt%; the composite fiber film has strong gas adsorption capability, and the zeolite imidazate framework nanoparticles are evenly composited in the high-molecular matrix, thus improving the application values of same in real life.

The invention discloses a nuclear-grade ion-exchange resin-based composite material and a preparation method thereof. The composite material is prepared by the steps: firstly reducing a platinum precursor into polymer-packaged nano platinum particles by using a reducing agent in existence of a polymer packaging agent; adding a silicon source and an aluminum source and then carrying out hydrothermal reaction employing a polymer as a structure-directing agent to obtain a platinum-silicon aluminum molecular sieve core-shell structure compound, wherein the inner core is nano platinum particles and the shell layer is a silicon-aluminum molecular sieve; and finally assembling the platinum-silicon aluminum molecular sieve core-shell structure compound to nuclear-grade ion-exchange resin to obtain the nuclear-grade ion-exchange resin-based composite material. The composite material has relatively high ion exchange property, relatively high catalytic removal efficiency, relatively high environment durability and extremely high recycling property, and has a good application prospect in the field of nuclear industry circulating water treatment.

The invention provides a polyethyleneimine modified biomass charcoal material and a preparation method thereof, and application of the polyethyleneimine modified biomass charcoal material to modification of a lithium-sulfur battery diaphragm, belonging to the technical field of lithium-sulfur batteries. The polyethyleneimine modified biomass charcoal material is prepared by reacting a biomass charcoal material with polyethyleneimine at room temperature in virtue of an impregnation process and then carrying out washing and drying. Polyethyleneimine has rich amino group and shows powerful capacity in capturing lithium polysulfide. Biomass charcoal has a hierarchical pore structure and a specific surface area of 2000-3000 m<2>/g and can adsorb and store lithium polysulfide. When applied to modification of the lithium-sulfur battery diaphragm, the modified biomass charcoal material can effectively inhibit polysulfide from shuttling back and forth between the positive and negative electrodes of a battery, thereby enhancing the cycle performance of the battery. The invention also discloses a lithium-sulfur battery with a modified diaphragm. The actual specific capacity of the lithium-sulfur battery is obviously improved.

The invention discloses a preparation method for an integral molecular sieve adsorbent for deep gas dehydration. The problem of difficulty of a molecular sieve adsorbent in meeting a deep gas dehydration requirement is solved. The preparation method comprises the following steps: (1) uniformly mixing an active molecular sieve, aluminic acid, an extrusion assistant, a drying additive and inorganic fibers; (2) mixing mixed dry powder and water, and kneading a green body; (3) aging the green body to obtain a prepared body; (4) performing compression molding on the prepared body to obtain a cellular blank; (5) shaping, drying and aging the cellular blank; (6) performing secondary drying on the shaped, dried and aged cellular blank; (7) performing calcination and furnace cooling on the secondarily dried cellular blank to obtain the adsorbent. The adsorbent has the characteristics of strong compressive strength, high abrasion resistance, low gas passing pressure drop and high dehydration depth, and is low in cost and suitable for popularization and application, and the preparation method is simple.

The invention discloses a flexible cuttable nanocellulose/covalent organic framework composite film and a preparation method thereof. The method comprises the following steps: chemically modifying nanocellulose (the carboxyl group is located at the C6 position) by using an amide condensation reaction to make an amino active group located at the C6 position of the nanocellulose, and carrying out vacuum suction filtration and drying on the obtained product to obtain a modified nanocellulose film; immersing the modified nanocellulose film in a 1,3,5-triformylphloroglucinol and p-phenylenediaminecovalent organic framework material precursor solution, and carrying out a solvothermal reaction in the presence of a catalyst; and ultrasonically washing the obtained reaction product with an organicsolvent, and carrying out high temperature activation in an oven to obtain the flexible cuttable nanocellulose/covalent organic framework composite film. The obtained flexible and cuttable compositefilm has the advantages of good film forming quality, compact, continuous, uniform and flat surface and good repeatability, and greatly maintains the crystallinity of the covalent organic framework material.

The invention belongs to the field of skin-care mask materials, and discloses a plant cellulose nanofiber antibacterial moisturizing mask and a preparation method thereof. The preparation method comprises the following steps of hydrolyzing plant fibers by enzyme, and mechanically treating, so as to prepare plant cellulose nanofiber with a high length-to-radius ratio; blending antibacterial chitosan, other functional ingredient particles and the plant cellulose nanofiber, emulsifying to obtain a uniform and stable white emulsion which is used as a mask raw liquid, pouring the mask raw liquid into a die, and preparing a mask sheet with a specified shape under certain conditions; finally, filling feeding a wetting agent into a package bag of the mask body containing the plant cellulose nanofiber and the functional ingredients, sealing an opening, sterilizing, and packaging. The plant cellulose nanofiber antibacterial moisturizing mask has the advantages that by adopting pure natural plantfibers, the poison and harm are avoided, the safe, economical and environment-friendly effects are realized, the water is favorably supplemented to the deep skin layer, and the absorbing speed and absorbing effect of a functional nutritional liquid are improved.