1570 results about "Macropore" patented technology

An improved porous ceramic biomaterial is disclosed in which a polymer such as polylactic acid is polymerized in situ to fill the micropores substantially without filling the macropores. The polymer reinforcement helps improve the strength of the implant while preserving its ability to support ingrowth of bone to help integrate the implant into its surgical environment.

The invention relates to a method for preparing a carbon material with rich mesopores and macropores. Inorganic nano-particles are used as pore-forming template agent to be uniformly distributed in a carbon-contained organic precursor and then the carbon-contained organic precursor carries out high-temperature carbonization, template agent washing-out and drying to obtain a porous carbon material. The carbon material prepared by the method has the specific surface area of 50-1,900 m/g and a pore diameter mainly between 2-900 nm, can be conveniently adjusted by the size control of the selected nano-particles, removes a template without using high corrosive HF and has the advantages of simple method, convenient operation, free pore diameter adjustment and control in a mesopore and macropore range, and the like. The carbon material has a wide application prospect in fields of electrochemical energy accumulation, macromolecular adsorption, catalyst carriers, composite materials, and the like.

A carbon monolith includes a robust carbon monolith characterized by a skeleton size of at least 100 nm, and a hierarchical pore structure having macropores and mesopores.

The present invention provides an organic/inorganic composite porous separator, which comprises: (a) a porous substrate having pores; and (b) an organic/inorganic composite layer formed by coating at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate with a mixture of inorganic porous particles and a binder polymer, wherein the inorganic porous particles have a plurality of macropores with a diameter of 50nm or greater in the particle itself thereby form a pore structure, a manufacturing method thereof, and an electrochemical device using the same. As an additional pathway for lithium ions is created due to a number of pores existing in the inorganic porous particle itself, degradation in the battery performance can be minimized, and energy density per unit weight can be increased by the weight loss effect.

The invention provides nitrogen mixed grapheme hydrogel of which the water content is 90 to 99.5 percent, the electric conductivity is 10-3-100 S/m, and the molar ratio of N and C is 1 to 25 percent. The invention further provides nitrogen mixed aerogel of which the molar ratio of N and C is 2 to 20 percent, the molar ratio of C and O is 15 to 5, nitrogen atoms existing in the form of amidogen nitrogen accounts for 40 to 70 percent, pyridine type nitrogen accounts for 10 to 40 percent, graphite type nitrogen accounts for 10 to 30 percent, the specific area is 300 to 1500 m<2>/g, the apertures which are micropore account for 10 to 20 percent, the apertures which are mesoporous 20 to 50 percent, the apertures which are macropore 30 to 70 percent, the apparent density is 0.01 to 0.2 g/cm<3>, the pore volume is 5 to 20 cm<3>/g, and the electric conductivity is 1 to 1000 S/m. The nitrogen mixed grapheme hydrogel or aerogel and preparation method thereof provided by the invention has the characteristics that the operation is simple, the equipment requirement is low, the production efficiency is high, the scale-up of the technology is easy, the nitrogen mixed content is controllable and the compounding with other functional substances is simple.

Provided are fibrous composites prepared by methods of the present invention, comprising oxides and biodegradable polymers, in which the fibers are made of aerogel-like oxide materials having nanometer-sized pores. The fibrous composition advantageously has, at least, the following characteristics: (i) a very high nanoporous surface area, which also permits nucleation of crystallites; (ii) mesoporous/macroporous interspacial networks between the fibers, providing high bioactivity and a high transport rate; (iii) macropores for natural one-like tissue growth; (iv) good mechanical properties for handling and for implant support; and (v) biodegradability for implant dissolution and time-variable mechanical properties. Further provided are methods for using the bioactive biodegradable fibrous composites as osteogenic composite materials for tissue engineering, tissue re-growth, bone implants, and bone repair, and/or for the delivery of drugs or therapeutic compounds.

The invention provides a preparation method of porous structured active carbon. The preparation method comprises the following steps of: drying animal bones serving as raw materials; pre-carbonizing at the temperature of 400 to 500 DEG C under the protection of an inert gas; crushing into powder; adding an activating agent into the powder; performing chemical activation under the protection of the inert gas; cooling and taking a product out; and performing aftertreatment process such as acid-washing, water-washing and drying to obtain the porous structured active carbon, wherein the product prepared at 850 DEG C has the specific surface area of 2,157 square meters per gram and the pore volume of 2.26 cubic centimeters per gram; the pores are in a three-dimensional distribution of micropores, mesopores and macropores. By taking organic substances and inorganic substances in the animal bones as a carbon source and a natural template with a special pore structure, the preparation method overcomes the defects of requirement on a template and difficulty in immersing pores in a template by using a carbon precursor, prepares the porous active carbon, and is low in cost and simple in process.

A clay stabilizer which is capable of inhibiting swelling in a wide variety of clay types and is also capable of restoring permeability in formations which have previously been damaged by clay swelling. Amine salts of differing molecular weights configurations and ionic strength are combined to provide transport into micropores, mesopores and macropores in the formation and to effect cationic change therein. A poly quaternary amine having a high to very high charge density is added along with lower molecular weight amine salts to substantially permanently exchange cations with the clay in the formation.

Provided is a preparation method of a porous ceramic material rapidly formed based on photocuring. The preparation method comprises the steps that firstly, a photo-cured resin prepolymer, an active diluent and a surface modifier are evenly mixed to obtain a premixed solution, ceramic powder and a pore-forming agent are mixed to obtain porous ceramic powder, then the porous ceramic powder is mixed in the premixed solution to obtain primary slurry, and then a photoinitiator is added to prepare a photocured porous ceramic slurry; the ceramic slurry is put in a photocuring forming device to prepare a photocuring forming blank; finally the blank is degreased and sintered to obtain the porous ceramic material. By designing and optimizing the components and proportion of the photocured porous ceramic slurry and using a photocuring 3D printing device, the limitations of traditional mold processing to shapes are overcome. The micropores formed by adopting the pore-forming agent and macropores for 3D printing are combined, and the high-porosity foam ceramic material can be prepared. In addition, the macropores are controllable in shape and distribution, and gradient porous ceramic material can be prepared.

This invention relates to doped catalysts on an aluminosilicate substrate with a low content of macropores and the hydrocracking/hydroconversion and hydrotreatment processes that use them. The catalyst comprises at least one hydro-dehydrogenating element that is selected from the group that is formed by the elements of group VIB and group VIII of the periodic table and a dopant in a controlled quantity that is selected from among phosphorus, boron, and silicon and a non-zeolitic substrate with a silica-alumina base that contains a quantity of more than 15% by weight and of less than or equal to 95% by weight of silica (SiO₂).

The invention discloses a composite lithium ion battery diaphragm comprising a nonwoven fabric substrate layer, an electrostatic spinning layer and a polymer porous coating, and the structure compound mode is as follows: polymer porous coating/ electrostatic spinning layer/ nonwoven fabric substrate layer/ electrostatic spinning layer/ polymer porous coating; nonwoven fabric substrate layer/ electrostatic spinning layer/ polymer porous coating; or polymer porous coating/ nonwoven fabric substrate layer/ electrostatic spinning layer/ polymer porous coating. The composite lithium ion battery diaphragm uses nonwoven fabric as a substrate to ensure the diaphragm high porosity and heat resistance, electrostatic spinning layers are arranged on the upper and lower surfaces of the nonwoven fabric substrate, the nonwoven fabric pore diameter can be reduced, the pore diameter is uniform, and the problem of short circuit caused by local macropore of the nonwoven fabric diaphragm can be solved, and by the arrangement of the polymer porous coating, the absorption and electrolyte maintaining capacity of the diaphragm can be improved, battery positive and negative electrodes can be bonded, battery mechanical properties can be improved, and the battery safety can be ensured. The prepared composite lithium ion battery diaphragm can satisfy the security requirements of large current charging discharging and running in harsh environments of a high-capacity high-power power battery.

The invention relates to a method for purifying electroplating wastewater and comprehensively utilizing resources, which is to adopt low-cost strong basic anion-exchange resin containing macropores and imidazole structure to reclaim valuable resources in the electroplating wastewater by coupling technology based on a chemical oxidation-reduction method, a precipitation method and an ion exchange method. The method comprises the following steps: firstly, Cr(III) is oxidized into Cr(VI) under basic condition through a chemical reaction; then, Zn, Cu, Ni and other heavy metal elements in the wastewater are transformed into precipitation of hydroxide; and finally, the Cr(VI) in the wastewater is adsorbed by the strong basic anion-exchange resin, the purified water quality achieves the requirement of electroplating pollutant discharge standard and recycle, and the Cr and other heavy metal resources in the electroplating wastewater can be comprehensively reclaimed and utilized. The method overcomes the defects that the prior regenerating process of porous weak-basic resin requires acidification, and the method has the advantages of simple process, low treatment cost, large treatment quantity and acid and base consumption conservation, and is the electroplating wastewater treatment method with green environmental protection and efficient utilization of resources.

The invention provides a coordination polymer material with a multistage pore passage structure and a preparation method thereof. The coordination polymer material with a multistage pore passage structure is internally provided with the multistage pore passage structure, the multistage pore passage structure is a microporous and/or mesoporous and/or macroporous multistage pore passage structure which is formed by the self assembly between the metal ion and the organic ligand, the apertures of the micropores are less than or equal to 2nm, the apertures of the mesopores are from 2nm to 50nm, and the apertures of the macropores are more than 50nm. The coordination polymer material with a multistage pore passage structure is large in specific surface, the large-size organic ligand does not need to be synthesized, and the coordination polymer material with larger porous sizes can be obtained without the template agent and the pore assisting agent, so that the invention is simple in preparation method, and low in cost.

The invention relates to a catalyst including at least one hydro-dehydrogenating element chosen from the group formed by the group VIB and group VIII elements of the periodic table and a substrate based on a silica-alumina matrix with a reduced content of macropores containing a quantity greater than 5% by weight and less than or equal to 95% by weight of silica (SiO₂) and based on at least one zeolite.

The invention also relates to a substrate based on a silica-alumina matrix with a reduced content of macropores containing a quantity greater than 5% by weight and less than or equal to 95% by weight of silica (SiO₂) and based on at least one zeolite. The invention also relates to hydrocracking and/or hydroconversion processes and hydrotreating processes utilising a catalyst according to the invention.

An inorganic monolithic material that includes macropores having an inner surface and nanoparticles attached to the inner surface of the material. The macropores and the nanoparticles can be optionally attached to molecular moieties that impart a specific functionality to the material. The material has particular applications to separations and chromatography.

Macroporous 3-D tissue engineering scaffold comprising elastomeric cross-linked polymer units and interconnected macropores containing living cells are produced by step of: in a mixture of the cells and elastomeric polymer units comprising activatable crosslinking groups, activating the crosslinking groups to form the scaffold.