10results about How to "Good pore connectivity" patented technology

The invention relates to a composite solid electrolyte and a preparation method thereof, and the preparation method comprises the following steps: mixing lithium halide and transition metal halide according to a molar ratio of (4.0-5.0): 1, carrying out ball milling, and drying to obtain a super ion conductor; uniformly mixing PVDF with an organic solvent to obtain a polymer solution; uniformly mixing graphene oxide, a super-ionic conductor and a polymer solution to obtain slurry; wherein in the slurry, the concentration of the super ion conductor is 40-90 wt%, and the concentration of the graphene oxide is 0.1-2 wt%; and carrying out vacuum drying on the slurry to obtain the composite solid electrolyte. The composite solid electrolyte prepared by the invention has relatively high ion transmission capability; and meanwhile, the lithium ion battery has good thermal stability, and the electrochemical performance and the safety of the lithium battery can be improved.

The invention belongs to the field of electrochemical sensors, and relates to an electrochemical sensor for high-sensitivity detection of carbendazim and a preparation method of the electrochemical sensor. The surface of a glassy carbon electrode (GCE) is modified with an LDMS-CCN-GCT nanocomposite material prepared from dendritic large-aperture mesoporous silica, conductive carbon black nanoparticles and graphitized carbon nanotubes, and a CCN-GCT-LDMS / GCE working electrode is formed. The preparation method comprises the following steps: firstly, uniformly dispersing CCN and GCT in an N, N-dimethylformamide solution through magnetic stirring in an ultrasonic environment, wherein the CCN and the GCT are equal in mass; then, adding LDMS into the solution, and carrying out ultrasonic dispersion to obtain a uniformly mixed CCN (at) GCT (at) LDMS suspension; and finally, dispensing the uniform suspension onto the surface of GCE, and drying under an infrared lamp to prepare the working electrode CCN (at) GCT (at) LDMS / GCE modified by the CCN (at) GCT (at) LDMS nano composite material. Based on the synergistic effect generated by LDMS and CCN-coated GCT, the CCN-coated GCT-coated LDMS / GCE sensor is high in sensitivity, the detection limit can reach 7.36 nM, and the CCN-coated GCT-coated LDMS / GCE sensor has excellent carbendazim sensing detection performance.

The invention discloses a multi-component co-pyrolysis biochar material taking mushroom dregs as a main component and a preparation method thereof, and the preparation method comprises the following steps: step 1, selecting gentamicin mushroom dregs as a main component, and wheat straw and kitchen waste as additives as substrates for preparing multi-component co-pyrolysis biochar; 2, optimizing the proportion of the three raw materials by using a mixed material design and a response surface model; step 3, performing pyrolysis at 550 DEG C, and performing oxygen-limited pyrolysis in a muffle furnace for 1 hour; 4, the yield and the specific surface area of the biochar serve as response indexes, and finally the optimal proportion of the three raw materials is obtained through model optimization. According to the prepared biochar material, the specific surface area and the pore structure of the biochar are remarkably improved, and the biochar material shows better application prospects in the fields of pollutant adsorption, soil improvement, environmental remediation and the like; through innovative raw material combination and process route, various key properties of the biochar are remarkably improved, and the biochar has wide market application value and scientific research significance.

The invention belongs to the technical field of coal bed gas exploitation, relates to a self-energizing activated drainage gas recovery process, and introduces a self-energizing technology and a fracturing exploitation technology. In other words, before the self-energizing activator is injected, the fracturing technology is adopted to exploit the coal seam, high-pressure liquid or gas is injected into the coal seam, the coal seam is fractured, cracks are opened, and new cracks and channels are created. The self-energizing activator can increase the permeability of the coal bed, improve the pore connectivity, increase the release rate and collection efficiency of the coal bed gas, increase the quantity of the collected coal bed gas and reduce the waste of coal bed gas resources.

The application discloses a DMAA gel system gel injection molding-non-pressure sintering porous Si3N4 ceramic and a preparation method thereof, and relates to the technical field of porous ceramic materials. The ceramic comprises, in terms of mass fractions, alpha-Si3N4 powder, Y2O3-CeO2 composite sintering aid, polymethyl methacrylate pore-forming agent, N, N-dimethyl acrylamide-N, N'-methylene bisacrylamide gel system, dispersant, initiator and deionized water. Through the synergistic effect of the DMAA low-toxicity gel system, the PMMA spherical pore-forming agent, the Y2O3-CeO2 composite aid and the step sintering process, the porosity is continuously adjustable, the bimodal pore size distribution and the high pore connectivity are realized, the bending strength is improved under the same porosity, the fracture toughness is improved, the technical bottleneck that high pores must have low strength is broken, and the ceramic is suitable for high-temperature filtration, catalytic carriers, aerospace and other fields.

This invention relates to a seedling substrate made from distiller's grains and its preparation process. The substrate comprises, by weight, 40-60 parts distiller's grains, 25-35 parts coconut coir, 7-12 parts perlite, 7-12 parts humic acid, 5-15 parts bamboo fiber with mycotoxin, and 0.4-0.8 parts iron oxide granules. The preparation steps are as follows: S1, fermenting the distiller's grains; S2, initially mixing the distiller's grains, coconut coir, and humic acid in a biaxial mixer to form a preliminary mixed substrate; S4, adding the preliminary mixed substrate, perlite, bamboo fiber with mycotoxin, and iron oxide granules into a three-dimensional mixer, mixing at 20-30 rpm for 30 minutes, adjusting the moisture content to 30-40%, and adjusting the pH to 6.0-7.0; S5, magnetizing the iron oxide granules. The seedling substrate of this invention has good air permeability, rich nutrients, and promotes root growth.

The invention discloses a preparation method of a biological porous zinc alloy with a composite structure implanted in the orthopedics department, which comprises the following steps: firstly, carrying out optimization design modeling by utilizing a computer pore structure, preparing a porous zinc alloy with a macroscopic pore structure by adopting a selective laser melting process according to a modeling result, and then preparing a micro-nano pore structure by adopting a vacuum-gas phase dealloying process. And obtaining the biological porous zinc alloy with the composite structure. On the basis of laser additive manufacturing and a vacuum-gas phase dealloying process, the biological porous zinc alloy with the macro-micro double-scale composite pore structure is obtained, the structures of macro pores and micro pores can be adjusted by adjusting process parameters, the mechanical property and modulus regulation and control of the porous zinc alloy are met, and meanwhile the mechanical property of the porous zinc alloy is improved. And the biological activity of the porous zinc alloy is effectively improved, adhesion, growth and differentiation of bone cells are well promoted, personalized pore structure optimization design and preparation are achieved, and the porous zinc alloy is suitable for orthopedic implant materials.

The invention discloses a preparation method of a three-dimensional graphene / copper composite pipe, and belongs to the field of material processing. Three-dimensional graphene and a copper sheet are compounded, a three-dimensional graphene / copper composite blank is prepared through a laminated hot pressing method, the composite blank is forged and pressed into a composite bar, the composite bar is fed into an extruding machine to be heated and then extruded into a composite pipe, natural cooling is conducted, and finally the obtained composite pipe is subjected to surface treatment. Compared with traditional two-dimensional graphene, the three-dimensional graphene material adopted by the invention not only has the inherent physicochemical properties of graphene, but also has the excellent characteristics of large specific surface area, high mechanical strength, excellent electron conduction capability, high heat conductivity and the like due to the three-dimensional porous micro / nano structure of the three-dimensional graphene material. Compared with the prior art, the two-dimensional graphene has the advantages that the two-dimensional graphene has a porous structure and better pore connectivity, and stacking and aggregation of two-dimensional graphene sheet layers can be avoided to a certain extent, so that the dispersity of the two-dimensional graphene in different media is improved. According to the super red copper tube prepared by doping the three-dimensional graphene into the copper matrix, the conductivity, the heat-conducting property and the mechanical property of the super red copper tube can be remarkably improved while the excellent performance of red copper is kept.

This invention relates to the field of silicone technology, specifically to a silicone composite thermally conductive material and its preparation process. The preparation process of a silicone composite thermally conductive material includes: pretreatment of graphene filler, preparation of modified graphene filler, preparation and modification of heterogeneous filler, and preparation of the silicone composite thermally conductive material. This invention utilizes modified graphene and the construction of a boron nitride-silica heterogeneous filler to form a multi-level thermally conductive network. Combined with electric field-induced ordered arrangement of fillers and pretreatment of graphene with chemically reduced gel and directional ice template, multiple methods are used synergistically to reduce interfacial thermal resistance and phonon scattering, constructing continuous thermally conductive channels. Simultaneously, it improves the structural uniformity, thermal conductivity stability, and mechanical properties of the composite material, effectively solving problems such as filler agglomeration and migration, and significantly improving the thermal conductivity of the silicone composite material.

The invention discloses an alumina ceramic ball with a communicated micropore structure and a preparation method and application thereof, and relates to the technical field of catalyst carriers. The ceramic ball takes aluminum oxide as a main raw material, and the content of the aluminum oxide is greater than or equal to 90wt%; mutually communicated micropores are formed in the ceramic ball, the diameter of the micropores is 0.1-2 microns, and the aperture deviation is less than or equal to 15%; the specific surface area of the ceramic ball is greater than or equal to 300m < 2 > / g, the porosity is 30-50%, and the compressive strength is The ceramic ball successfully realizes ideal combination of a high specific surface area and a high strength characteristic, and provides a huge loading space and rich reaction active sites for a catalyst; meanwhile, the compressive strength can still be kept at 150 MPa or above, and the porosity is 30%-50%, which shows that the material has an extremely high specific surface area, the skeleton structure is still compact and firm, and the common technical contradiction of low strength caused by high porosity of a porous material is effectively overcome.