16 results about "Aggregate structure" patented technology

The invention provides a method for analyzing and determining an aggregation structure in a condensed state, which comprises the following steps: step 1, measuring a same condensed state substance sample by adopting at least two structure determination means with different principles, at least another kind of structure measurement means is used for obtaining nanoscale or mesoscale aggregation structure information so as to obtain multi-source structure measurement data representing different structure hierarchies. According to the method, multi-scale structure measurement data is obtained by adopting at least two structure measurement means with different principles for the same condensed substance sample, and structure information of different scales is subjected to combined treatment in the same analysis process; and the structural characteristics of the aggregation structure on the atomic scale, the nanoscale and the mesoscale can be simultaneously included in an analysis range, so that the characterization integrity of the overall characteristics of the aggregation structure in the condensed state is improved.

The embodiment of the invention provides a preparation method of graphene composite powder. The preparation method comprises the following steps: adding a mixed material of powder and a solid carbon source into a reaction cavity; vacuumizing the interior of the reaction cavity, and then filling inert gas to normal pressure; treating the mixed material in the reaction cavity by adopting an acoustic resonance process, and setting sound wave frequency, acceleration, treatment time and material temperature; and collecting products, and cleaning and separating powder. A mixed material in a reaction cavity is treated by adopting an acoustic resonance process, direct contact friction between a grinding material and powder is avoided through acoustic resonance mixing, the risk that impurities are introduced due to mechanical abrasion is reduced, and the problems that the cost is high and the compounding efficiency is low when graphene powder is prepared through a conventional vapor deposition method are solved; the acoustic streaming effect generated by resonance can permeate into the powder aggregate, the aggregate structure is effectively disassembled and is not influenced by different material densities, powder particles with different particle sizes and different components are promoted to be uniformly dispersed and interacted, and the shape of the original powder is not changed.

This invention relates to a composite mineral-modified polyethylene agricultural mulch film and its preparation method. The agricultural mulch film comprises a polyethylene matrix resin and a composite mineral filler dispersed therein. The composite mineral filler is composed of 27%~33% wollastonite, 18%~22% attapulgite, 27%~33% tourmaline, and 18%~22% hexagonalite, and undergoes electromagnetic oscillation physical activation treatment to achieve a specific surface area ≥250m² / g, a particle size ≤2μm, and the formation of hydroxyl active sites on the surface. This invention also discloses the preparation method and its dual functions of degradation and soil improvement. The agricultural mulch film has a tensile strength ≥18MPa, an elongation at break ≥400%, a biodegradation rate ≥70% after 6 months, a far-infrared emissivity ≥0.90, and a negative ion release ≥1200 ions / cm³. After 6~9 months of field use, it disintegrates, and the residual minerals continuously regulate soil pH, release trace elements, and improve the aggregate structure, achieving a virtuous cycle of mulch film degradation and soil improvement.

The invention provides desulfurization solution erosion resistant concrete and a preparation method thereof. The desulfurization solution erosion resistant concrete is suitable for coke oven gas desulfurization solution alkaline and various composite salt ion erosion environments. The concrete is formed by compounding water, cement, fly ash, superfine slag powder, a capillary crystalline material, limestone coarse aggregate, limestone fine aggregate and a polycarboxylate water reducing agent according to a preset weight part ratio, the selection of the limestone aggregate ensures the stability of the aggregate structure in alkaline and salty erosion environments, and the synergistic effect of fly ash and superfine slag powder in the admixture ensures the stability of the aggregate structure in the alkaline and salty erosion environments. The compactness and the composite salt corrosion resistance of the concrete are improved, and the composite salt ion penetration resistance is enhanced through internal doping of the capillary crystalline material. According to the preparation method, the concrete with stable performance is obtained by premixing part of the cement and the capillary crystalline material, sequentially mixing and performing standard curing. The durability and the service life of the concrete under the erosion condition of the coke oven gas desulfurization liquid are remarkably improved, the environmental pollution is reduced, and good economic benefits and application prospects are achieved.

The utility model discloses water conservancy project detection sampling equipment which comprises a bottom plate, rollers are fixedly connected to four corners of the bottom of the bottom plate, two mounting seats are fixedly connected to the right side of the top of the bottom plate, push rods are fixedly connected to the interiors of the mounting seats, and a driving mechanism is arranged at the top of the bottom plate. A sampling assembly is arranged on the left side of the bottom plate. By using the driving mechanism, the sampling assembly can be driven, the sampling work of the sampling assembly is facilitated, soil layers with different depths can be sampled by using the sampling assembly, and the problems that when soil is sampled, a drilling mode is generally adopted for sampling, and in the drilling process, the sampling efficiency is greatly improved are solved. The problem that the sampling effect of each layer of soil is reduced due to mixing of the upper layer of soil and the lower layer of soil due to the fact that the aggregate structure of the soil is damaged by rotation of the drill bit is solved, and the sampling device has the advantage of being convenient to sample.

Provided is a silica that exhibits a high matting property when utilized as a matting agent for a paint, and can also suppress the occurrence of cloudiness. The silica has an aggregated structure in which primary particles are aggregated, has a particle diameter ratio R represented by the following equation (1) of from 4.3 to 5.2, has an absorbance of 0.6 or less for light having a wavelength of 700 nm as an aqueous dispersion having a concentration of 1.48 mass %, and has a particle density measured with a He pycnometer of 2.18 g / cm3 or more: Equation (1) R=LD50 / CD50 (in the equation (1), LD50 represents a volume-based 50% cumulative particle diameter (μm) of the silica measured based on a laser diffraction / scattering method, and CD50 represents a volume-based 50% cumulative particle diameter (μm) of the silica measured based on a Coulter counter method).

The invention provides a preparation method and application of conductive aggregate, and aims to solve the problems that conductive coating aggregate is difficult to prepare, and the performance and component stability of a developed conductive coating aggregate material are insufficient. The method comprises the following steps: mixing fine aggregate with a polyacrylic resin coating, and continuously mixing under a heating condition to obtain fine aggregate of which the surface is coated with a polyacrylic resin adhesion layer; and mixing the fine aggregate with carbon nanotube powder, and heating and mixing, so that the polyacrylic resin adhesion layer on the surface of the fine aggregate is softened and adheres to the carbon nanotube powder to form a conductive layer, thereby obtaining the carbon nanotube conductive aggregate with a conductive layer-adhesion layer double-layer coating structure. And finally, mixing the conductive aggregate, cement and water to form a stable conductive aggregate structure in the cement-based composite material. According to the conductive cement-based composite material prepared by the invention, the conductivity is greatly improved under the condition of using a nano material with an extremely low doping amount.

The invention discloses a well cementation cement design method fusing a close packing theory and machine learning, and relates to the field of carbon dioxide geological sequestration, and the well cementation cement design method comprises the following steps: obtaining particle size data of cement, silicon powder, superfine silicon powder and nano SiO2; the method comprises the following steps: constructing a three-dimensional random putting and optimization algorithm of a multi-particle-size material through an improved MAA particle accumulation model, and setting a material ratio constraint condition; putting the aggregates according to a preset sequence to generate corresponding spatial positions and postures, and forming a three-dimensional aggregate structure; a genetic algorithm and a machine learning driven optimization strategy are combined, the material ratio is autonomously optimized with the minimum porosity as the target, and the optimal material ratio is obtained; and carrying out compressive strength, permeability and porosity tests to verify the feasibility and CO2 corrosion resistance of the design method. By means of the method, efficient and accurate design and verification of the well cementation cement ratio are achieved, and finally the optimized formula with high compactness, high strength and high durability in the CO2 corrosion environment is obtained.

The present invention relates to carbonaceous particulate materials having an optimized Braun-Emmet-Teller specific surface area (BET SSA), pore size distribution, crystallinity and aggregate structure, which have advantageous properties such as, for example, high corrosion resistance and improved mass transfer properties, which make them particularly useful as support materials for catalysts in fuel cells or electrolytic cells.

The invention discloses a full-graded concrete three-phase mesoscopic finite element uncertainty quantitative analysis method, and relates to the technical field of building engineering material computer simulation, and the method comprises the following steps: generating a reference finite element grid based on an obtained three-dimensional mesoscopic structure sample, carrying out three-phase material unit division by identifying aggregate area nodes, and carrying out three-phase material unit division; after corresponding material constitutive models are given to the divided three-phase units, a three-phase finite element model corresponding to the three-dimensional microstructure sample is formed, and mechanical property numerical simulation is executed; and macroscopic mechanical property indexes are extracted from the simulation result in batches, and uncertainty quantification and correlation analysis are carried out. According to the method, a complete and efficient solution from an aggregate structure to a three-phase model and then to uncertainty analysis is formed, and a technical support is provided for probability design and performance evaluation of the fully-graded concrete.

The invention discloses ultra-high performance concrete, a compressed air energy storage cavern lining and a preparation method of the compressed air energy storage cavern lining, and belongs to the technical field of underground engineering building materials. The ultra-high performance concrete is prepared from the following raw materials: 500 to 520 parts of cement, 100 to 110 parts of fly ash, 120 to 130 parts of silica fume, 200 to 220 parts of mullite powder, 450 to 500 parts of corundum coarse aggregate, 750 to 800 parts of fine aggregate and 30 to 50 parts of basalt fiber. In the preparation method, carbon dioxide curing is carried out, the volume concentration is 20-30%, and the gas pressure difference of the curing environment is 0.4-0.5 MPa. A high-temperature-resistant mineral system is constructed according to the formula, the overall strength, compactness and high-temperature stability are improved through grading design, and the toughness and crack resistance are improved through basalt material fibers; the carbon dioxide curing is cooperated with the dual regulation and control effects of a high-temperature-resistant material system and an optimized aggregate structure, so that excellent mechanical properties and air tightness under high-pressure and high-temperature conditions are ensured.

This invention provides a method and experimental apparatus for inverting and constructing the structure of concrete aggregates, belonging to the field of concrete testing technology. This method and apparatus can obtain the true spatial position and orientation of target aggregates within concrete, achieving three-dimensional reconstruction of key aggregates. Based on the reconstruction results, a concrete-aggregate three-dimensional structural model consistent with the specimen is simultaneously established in the numerical model. Without damaging the specimen structure, the large aggregates within the concrete specimen are precisely located, and their spatial information is used for three-dimensional structural inversion and numerical modeling. This technical solution achieves a high degree of consistency between experimental results and theoretical analysis and numerical simulation, meeting the engineering needs of concrete fracture mechanism research and complex structural performance evaluation.

The application relates to a method for preparing a supported MOF membrane by inducing a low-crystal aggregate structure, an MOF membrane and application. The preparation method comprises the following steps: 1) depositing Al-MOF crystal seeds on the surface of a porous support to obtain an Al-MOF crystal seed layer; 2) placing the porous support with the Al-MOF crystal seed layer deposited on the surface in a supersaturated solution to perform a reaction, and growing a continuous low-crystal Al-MOF aggregate layer on the surface of the porous support; and 3) performing a crystallization reaction on the porous support with the continuous low-crystal Al-MOF aggregate layer grown on the surface to obtain the Al-MOF membrane material; the supersaturated solution comprises an aluminum salt, a ligand and a coordination regulator. The method can prepare a dense high-valence metal MOF crystal membrane material, and the membrane material can be used for efficient separation of various molecular scale separation systems.

Supramolecular J-aggregate structures and related systems and methods are generally described. Certain aspects relate to supramolecular J-aggregate structures that are coated by an encapsulating material, such as silica. In certain embodiments, the supramolecular J-aggregate structures have relatively high quantum yields and / or relatively fast emissive lifetimes. Such structures can be incorporated into light emitting materials that are relatively bright and / or that refresh relatively quickly.