11results about How to "Prevent vulcanization" patented technology

The invention discloses a preparation method of a basalt short fiber (BF) oriented reinforced rubber composite material. The method comprises the following steps: 1) pretreating BF; 2) proportionally weighing BF and other raw materials, and sequentially adding the BF and other raw materials into an internal mixer for mixing; and (3) after uniformly mixing, carrying out open milling and sheet discharging, and carrying out performance test after carrying out calendering orientation vulcanization on the obtained rubber material along the BF direction. The composite material comprises the following components in parts by mass: SCR5: 85; 15 parts of BR; 0.3 part of CTP (Cellulose Triphosphate); n234: 43; dZ: 1.8; bF: 3 is firstly treated; s: 1; and after the two-stage mixing, the rubber material is subjected to calendering orientation along the BF direction and is vulcanized along the orientation direction. The pre-treated BSF is treated by using a sodium stearate method, so that the physical and mechanical properties of the composite material are relatively good, the pre-treated BF after pretreatment is relatively high in lipophilicity and relatively good in compatibility with a rubber matrix, and the comprehensive performance of the modified BF after being matched with latex and the like is relatively high.

The invention discloses a wafer-level single-layer MoS2 continuous film and an APCVD film forming method and application thereof.The wafer-level single-layer MoS2 continuous film is obtained by adopting a pipe-in-pipe APCVD tubular furnace, and conducting in-situ annealing on a C-A face sapphire substrate in the mixed atmosphere of oxygen and argon before the MoS2 continuous film grows; then the sulfur powder and the C-A surface sapphire substrate are heated at the same time in the mixed atmosphere of argon and hydrogen, the molybdenum trioxide powder is heated at the same time in the argon atmosphere, the wafer-level MoS2 continuous thin film of a single-layer structure is successfully prepared, and the technical problem that in the prior art, the wafer-level single-layer MoS2 thin film prepared through an APCVD method is discontinuous is solved. The wafer-level single-layer MoS2 continuous film prepared by the method has the characteristics of high quality and good uniformity, and is beneficial to large-scale integration and application of two-dimensional electronic devices.

The invention provides rubber for an underground carry-scraper tire, a preparation method of the rubber and the underground carry-scraper tire. The preparation method of the rubber for the underground carry-scraper tire comprises the following steps: S1, mixing a vulcanizing aid, a filler, rubber and a first solvent to obtain a pre-mixture, and continuously introducing the pre-mixture into a reactor for solvent separation to obtain a rubber master batch; s2, after the master batch is internally mixed, protective wax and tear-resistant resin are added for mixing, and first-section master batch is obtained; s3, mixing the primary masterbatch with a first accelerant and a first vulcanizing agent, and performing final mixing to obtain final mixed rubber; and S4, performing vulcanization treatment on the final mixed rubber to obtain vulcanized rubber. The rubber material prepared by the method for continuously preparing the master batch has excellent processability and mechanical property, and the prepared vulcanized rubber has excellent tensile property, tearing property and the like, can adapt to harsh working environments, and is particularly suitable for preparing underground carry-scraper tires.

The invention relates to the technical field of batteries, in particular to a safety type less-maintenance flooded battery which comprises a battery body, a battery cover and a battery cover, and the battery body is provided with a communication channel capable of releasing oxyhydrogen; and the reaction bin covers the battery body and forms a sealed space communicated with the communication channel, and a catalysis part capable of catalyzing a hydrogen-oxygen gas composite reaction is arranged in the reaction bin. The sealed space formed by the battery body and the reaction bin is matched with the precise positioning design of the catalytic part, so that the utilization rate of oxyhydrogen gas is greatly improved, water vapor generated by an oxyhydrogen composite reaction flows back to an original single-cell battery along a directional path after being condensed, a liquid supplementing closed loop of electrolysis-composite-backflow is formed, water loss of the battery is reduced, and the service life of the battery is prolonged. And the water replenishing maintenance frequency is reduced, the trouble of frequent maintenance is eliminated, and the maintenance cost and workload of a user are reduced.

This invention discloses a low-temperature negative electrode lead paste formulation and its preparation method. The raw materials are as follows by weight percentage: lead powder: 82%-88%, barium sulfate: 5%-12%, sodium lignosulfonate: 0.2%-1.0%, humic acid: 0.5%-1.0%, carbon black: 1%-2%, expanded graphite: 1%-2%, graphene: 0.5%-1.5%, and deionized water: balance. A mixture of spherical lead powder and flake lead powder (spherical powder accounting for 60%-70%) is used. The high specific surface area of ​​the spherical lead powder improves the wettability of the electrolyte, while the layered structure of the flake lead powder increases the porosity. The synergistic effect of these two materials increases the porosity of the negative electrode active material to 65%-70% (compared to approximately 55%-60% in traditional lead paste), accelerating the dissolution of lead sulfate and the diffusion of Pb²⁺.

This utility model provides an immersion thermal management system, comprising: a working chamber for housing a heating element; a cooling unit array located within the working chamber, the cooling unit array comprising multiple cooling units arranged at intervals, each cooling unit containing a flowing cooling liquid, the heating element being located between adjacent cooling units; a first heat exchanger connected to the cooling unit array via a liquid pipeline for cooling the cooling liquid; and a gas source connected to the working chamber via a gas pipeline for supplying a high thermal conductivity gas to the working chamber, the heating element being immersed in the high thermal conductivity gas, the high thermal conductivity gas flowing within the working chamber, transferring the heat generated by the heating element to the cooling units, thereby cooling the heating element.

The invention relates to the technical field of injection molding models and sprue channels, in particular to a rubber cold runner system. The rubber cold runner system comprises an injection runner plate, a rubber runner is formed in a plate body of the injection runner plate, the rubber runner comprises horizontal runners extending along an extension plane of the plate body, a rubber inlet is formed in the injection runner plate, the horizontal runners are communicated with the rubber inlet, and the horizontal runners are communicated with the rubber inlet. The injection runner plate is provided with injection nozzles at the tail ends of the horizontal runners, the injection nozzles extend in the thickness direction of the plate body, injection runners of the injection nozzles are communicated with the horizontal runners, a quick cooling runner and a temperature control runner which extend along the extension plane of the plate body are further formed in the injection runner plate, and the temperature control runner is communicated with the quick cooling runner in the thickness direction of the injection runner plate. The rapid cooling runner is located between the horizontal runner and the temperature control runner; when the rubber cold runner system is manufactured, only the corresponding runner holes need to be machined in the thickness direction of the plate body, the whole machining process is simple, use is easy, operation is easy, and cost is low.

The invention provides a preparation method of a heterostructure hollow Ti3C2-coated TiSe2 composite material and an application of the heterostructure hollow Ti3C2-coated TiSe2 composite material in a sodium-ion battery, the Ti3C2-coated TiSe2 composite material is finally subjected to in-situ selenylation synthesis through a simple template method and a solid-phase sintering means, and the Ti3C2-coated TiSe2 composite material is used as a sodium-ion battery negative electrode material, shows high reversible capacity, and can be used as a sodium-ion battery negative electrode material. The unique structure makes up the defect of MXene in the aspect of structural stability, shortens the ion diffusion distance in the electrochemical reaction process, further enhances the surface activity of the substance, and improves the conductivity of the material. The MXene and TiSe2 structures are compounded, so that the problem of ion volume expansion in the electrochemical reaction process can be effectively relieved, and the capacity and rate capability are further improved.

The application relates to the technical field of composite film materials, and particularly discloses a bifunctional composite carrier as well as a preparation method and application thereof. 1‑a X a The ceramic material is selected from at least one of Al2O3, ZrO2, YSZ, TiO2, SiC or MoSi2. The bifunctional composite carrier provided by the application has structural support strength and high-efficiency heating performance, effectively making up the blank in the prior art that no ideal support body material is used in the field of Joule heat and has excellent electric conductivity to realize rapid and uniform heating, a suitable pore structure to ensure low-resistance mass transfer, and excellent mechanical strength and stability at high temperatures.

This invention belongs to the field of SERS detection, specifically relating to a double-shell Ag-ZnAl2O4-MOF composite material, its preparation method, and its application in trace detection of organic pollutants. First, ZnAl2O4 nanoparticles are synthesized using a hydrothermal method. Then, the prepared ZnAl2O4 nanoparticles are placed into a prepared MOF growth solution to form a ZnAl2O4-MOF composite structure. Further composite with Ag nanoparticles is then formed to create the double-shell Ag-ZnAl2O4-MOF composite material. The Ag-ZnAl2O4-MOF composite substrate exhibits a synergistic effect of physical and electromagnetic reinforcement. Furthermore, due to the large specific surface area, porosity, and multiple metal sites of the intermediate MOF layer, more hot spots can be formed. The charge transfer effect generated by the composite with ZnAl2O4 produces an electromagnetic reinforcement effect. These characteristics effectively enhance the SERS signal intensity.

The invention discloses an on-line sulfur removal system and method for a lead-acid storage battery, and relates to the field of lead-acid batteries, the on-line sulfur removal system for the lead-acid storage battery comprises a storage battery pack, the storage battery pack is formed by connecting a plurality of storage battery units in series, and the number of the storage battery units is one more than that of the storage battery units in the storage battery pack with rated voltage; the sulfur removal module is connected with the two ends of each storage battery unit and is used for removing sulfur from the storage battery units; and the circuit switching module is electrically connected with the storage battery pack, and is used for moving the storage battery pack out of the main circuit during desulfurization and connecting the storage battery pack to a processing circuit. Forward sharp pulses are directly applied to the positive electrode and the negative electrode of each storage battery unit through the sulfur removal module, efficient sulfur removal is achieved, meanwhile, the sulfur removal units are automatically short-circuited and separated, and the output voltage is kept stable. The voltage acquisition module monitors the voltage of each battery unit in real time, and the on-line processor module controls circuit switching, so that automatic balanced desulfurization is realized, vulcanization is prevented, and the service life of the battery is prolonged.