11results about How to "Realize the barrier effect" patented technology

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

The embodiment of the present application provides a dry chemical test strip and a preparation process, which relates to the field of dry chemical detection. The dry chemical test strip includes an upper substrate, an intermediate layer and a lower substrate stacked in sequence along the longitudinal direction, and the upper substrate is provided with a plurality of sample addition holes arranged at intervals; the intermediate layer includes a plurality of detection areas and a barrier area, which is a porous material membrane and the pores of the barrier area are irreversibly closed-cell treated, the pores of the detection area can allow the liquid to penetrate from the sample addition holes and diffuse in the longitudinal and transverse directions, and each barrier area is correspondingly arranged around the periphery of the detection area and defines the lateral diffusion boundary of the liquid; the lower substrate is provided with a plurality of detection holes. The preparation process of the above-mentioned dry chemical test strip mainly involves stacking the layers together in sequence, performing a closed-cell treatment on the pores of the barrier area of ​​the intermediate layer, or performing a closed-cell treatment first and then stacking. The dry chemical test strip and the preparation process of the embodiment of the present application have a simple structure and process, and can realize independent detection of each detection area without interfering with each other.

This invention discloses an anti-condensation and heat-insulating superhydrophobic aerogel coating, its preparation method, and its application in industrial thermal equipment. The method includes: segmentally modifying silica aerogel with reactive silane and hydrophobic silane in an alcohol-water mixture to obtain a bifunctional modified aerogel containing both resin-binding groups and low surface energy groups; emulsifying a phase change core material into droplets to obtain dew-point responsive bifacial breathing microcapsules; grafting polysiloxane onto the microcapsules; mixing waterborne silicone-modified film-forming resin, sheet-like shielding filler, flame-retardant filler, dispersant, defoamer, rheology modifier, film-forming aid, and water to obtain a base slurry; and performing leveling, pre-curing, and post-curing of the anti-condensation and heat-insulating superhydrophobic aerogel coating to enrich it, thereby obtaining an anti-condensation and heat-insulating superhydrophobic aerogel coating layer. This significantly reduces the wet thermal conductivity, ensuring the long-term heat-insulating effect of the coating under condensation conditions.

The utility model discloses a single battery and a battery pack, and relates to the technical field of batteries. The single battery comprises a battery cell, a cover plate and a shell, the shell is provided with an accommodating cavity and an opening, the cover plate is plugged at the opening, and the battery cell is arranged in the accommodating cavity. A liquid injection hole is formed in the cover plate, a containing groove is formed in the top face of the cover plate and located in the peripheral side of the liquid injection hole, a partition structure is arranged in the containing groove and divides the containing groove into a first containing groove body and a second containing groove body, the first containing groove body is located between the liquid injection hole and the second containing groove body, and a drainage groove is formed in the partition structure. The drainage groove communicates with the first containing groove and the second containing groove, and the bottom wall of the drainage groove is higher than the bottom wall of the first containing groove. According to the single battery provided by the invention, the double effects of drainage and blocking of the electrolyte are realized, so that the possibility of polluting and corroding the top cover assembly after the electrolyte overflows is effectively reduced.

The invention relates to an amplifier circuit, a differential amplifier circuit, a receiving circuit and a signal link. An amplifier circuit of the present application comprises: a current source; the first end of the current source is connected with the first power supply end; an input pipe; the drain end of the input tube is connected with the second end of the current source, and the input tube is configured as the signal output end of the amplifier circuit; any one of the source end and the grid end of the input tube is configured as a signal input end of the amplifier circuit; and the capacitance-inductance resonance body is coupled between the source end of the input tube and the second power supply end in series, and is used for enabling the gain of the amplifier circuit to form an extreme value at a set frequency. According to the invention, the CMT event can be filtered, and the influence of the CMT event on the signal link is reduced.

This invention relates to the field of low-frequency elastic wave bandgap technology, and more particularly to a method for controlling the low-frequency elastic wave bandgap based on viscoelastic damping materials. The invention includes the following steps: converting the Young's modulus of the viscoelastic damping material into a function varying with frequency, introducing a first control factor; analyzing the control law of the first control factor on the negative property material parameters, and analyzing the elastic wave transmission characteristics in the viscoelastic damping material when the material parameters within the bandgap are negative; introducing a second control factor to adjust the viscoelastic damping material parameters to a complex form, and analyzing the control law of the second control factor on the complex property material parameters; determining the dispersion curve when the viscoelastic damping material parameters are complex, and analyzing the influence of the complex property tensile modulus on the elastic wave transmission characteristics based on the real and imaginary parts of the dispersion curve; and analyzing the control law of the elastic wave dispersion characteristics when the tensile modulus of the viscoelastic damping material is complex. This invention can solve the problem of high difficulty in low-frequency vibration reduction and noise reduction.

This application belongs to the field of valve core processing, specifically an automatic valve core grinding machine. A conveyor frame is mounted on the upper surface of the frame, and baffles are fixedly connected to both sides of the conveyor frame. An adjustable grinding frame is mounted on the upper surface of the frame, and a grinding wheel is installed on the inner wall of the adjustable grinding frame. A support plate is fixedly connected to the inner wall of the frame, and a feeding and collecting mechanism is provided on the inner wall of the frame. The feeding and collecting mechanism includes a pushing component and a collecting component. This application achieves automatic and stable pushing through the pushing component. A motor drives a rotating disk, which in turn drives a push rod via an eccentric connecting rod. A magnetic block ensures pushing stability, and the inclined surface of the baffle allows the push rod to disengage from the magnetic attraction and adjust its angle. This allows valve cores with rust or dirt to be smoothly pushed into the grinding area, solving the problem of material jamming. No manual intervention is required, improving conveying reliability and process automation efficiency.

The invention belongs to the field of composite materials, and provides a silicon-acrylate adhesive, cotton and membrane material composite material. According to the invention, a four-layer composite structure design of the A-surface silica gel layer, the solvent-free curing isolation barrier layer, the composite carrier layer and the B-surface acrylate adhesive layer is adopted; the heterogeneous double-sided bonding performance that a high-solid-content low-viscosity coating window, an ultrathin solvent-free isolation layer and high-barrier migration resistance are achieved, the peeling strength of a surface A to silicone rubber is not lower than 6N / 25mm, and the lasting adhesion of a surface B to a metal base material is not lower than 24h is achieved; the technical problem that a traditional double-faced adhesive tape system is difficult to consider the ultrathin coating coiling process, the high cohesion creep resistance and the size stability under multiple thermal history conditions is solved, and the double-faced adhesive tape has wide application value.

This invention relates to the field of heat exchanger tube manufacturing and assembly technology, specifically to an automated cutting and assembly device for heat exchanger tubes. The device includes a guiding and conveying structure, a flow-diverting and limiting structure, and a cutting and assembly structure. The flow-diverting and limiting structure is fixedly connected to one side of the guiding and conveying structure, and the cutting and assembly structure is also fixedly connected to one side of the flow-diverting and limiting structure. The guiding and conveying structure guides the heat exchanger tubes, pushing them to switch positions on the flow-diverting and limiting structure. The flow-diverting and limiting structure is used for switching the heat exchanger tubes and also provides multi-point limiting functionality through a control guiding unit. The cutting and assembly structure is used for cutting and assembling the heat exchanger tubes. The cutting component performs multi-position angle cutting, and the assembly component guides the assembly, resulting in an interference fit between the heat exchanger tubes and the heat exchanger mating plate. This structural design facilitates integrated production processes of material guiding, cutting, and assembly, improving the automation capability of heat exchanger manufacturing.

The invention belongs to the technical field of building decoration materials, and particularly relates to a sound insulation and heat insulation integrated jute fiber core board which is a composite board body of an integrated layered composite structure, and the composite board body is sequentially laminated and compounded with a surface layer, a first supporting layer, a jute fiber body, a second supporting layer and an inner layer in the thickness direction of the board; the jute fiber body comprises at least two jute fiber felts which are laminated and compounded, a plurality of Helmholtz resonant cavity units which are distributed in the jute fiber felts in an array manner, and a heat-insulating and heat-preserving filler which is filled in the jute fiber felts; through the synergistic effect of the jute fiber porous sound absorption structure and the resonance sound absorption principle of the Helmholtz resonant cavity units, the low and medium frequency noise frequency band of 200-1000 Hz is covered, and the problem that a traditional jute fiber board is poor in low and medium frequency noise treatment effect is solved. The jute fiber felt is filled with the heat insulation filler, the sound insulation function and the heat insulation function are fused, and the problem that a traditional jute fiber board is poor in sound insulation and heat insulation performance synergism is solved.

This utility model discloses a computer cable winder, comprising: multiple winding components stacked vertically; each winding component includes a barrier plate with a connecting cylinder in the center and multiple anti-derailment brackets arranged in a circular array on its sides; and a placement bracket for positioning the stacked winding components, including a stabilizing base. This utility model provides a computer cable winder where each winding component can independently wind one cable, achieving independent winding and preventing tangling caused by winding multiple cables together. The barrier plate provides isolation between stacked winding components, the multiple anti-derailment brackets on the connecting cylinder effectively prevent the wound cable from falling off, and the Velcro A and B sides at the top and bottom of the connecting cylinder allow for the adhesion and fixation of adjacent winding components.