8results about How to "Hinder contact" patented technology

The invention discloses a method for manufacturing a wafer based on a chemical corrosion method, and relates to the technical field of chips, in particular to the technical field of wafer manufacturing. According to the specific scheme, a wafer and a crystal ingot are separated through a corrosion method of an acid corrosion mixed solution, the separation process is milder, the fragment risk caused by ultrasonic vibration can be avoided, laser burning points can be evenly removed, meanwhile, the roughness of a separation face is reduced, the surface planarization is improved, and the surface quality is improved. And the processing time of the subsequent grinding procedure and the loss of the grinding wheel can be reduced. Besides, in the etching process of the acid corrosion mixed solution on the laser modified layer, part of hydrogen can be generated while the modified layer is dissolved, so that a mixed solution flowing channel is formed in the modified layer, the wettability of the mixed solution can be enhanced by adding the polyoxyethylene ether surfactant, flowing of the mixed solution is promoted, and the corrosion resistance of the laser modified layer is improved. And meanwhile, bubbles can be prevented from growing up to hinder contact between removed substances and mixed liquid, so that the ablation efficiency and uniformity of the laser ablation layer are improved.

The invention discloses a preparation method of a composite carbon material, the composite carbon material prepared by the preparation method and application of the composite carbon material. And mixing a mixed binder containing an organic binder, a metal simple substance, an additive and a solvent with the active carbon material, and drying to obtain the composite carbon material. According to the principle of similar compatibility, the organic ligand and the binder can form a sufficient mixture, and the metal elementary substance and the binder are sufficiently combined through the pi bond, so that the cohesiveness is improved. The presence of the binder can be made into a modified carbon material containing a hydrophobic layer. The hydrophobic layer is helpful for preventing active sites of the carbon material from being contacted with hydrogen ions, so that the hydrogen evolution overpotential of the carbon material is improved. Besides, the metal elementary substance can form crystal sites of the metal lead, the charging and discharging process of the lead-acid battery is a conversion process between the metal lead and lead sulfate, more crystal sites of the metal lead can refine the grain size of the metal lead as a charging product, and the purpose of refining the grains of the lead sulfate as a discharging product can be indirectly achieved. Finally, the cycle life of the lead-carbon battery is prolonged.

The utility model relates to the technical field of chemical fabric production and manufacturing, in particular to anti-static chemical fabric which comprises a base fabric layer, an anti-static layer is arranged on the base fabric layer and comprises first anti-static fibers and first fixing strips, the multiple sets of first fixing strips are arranged on the base fabric layer in parallel, the first fixing strips are arranged in a wave shape, and the first anti-static fibers are arranged on the first fixing strips. The external connection layer is arranged on the outer side of the anti-static layer, and the external connection layer is made of the one-way moisture conduction material, so that the anti-static layer can be protected, and liquid can be prevented from permeating into the anti-static layer to make contact with the anti-static layer, so that the effect is prevented from being weakened.

This invention discloses a functionalized MXene-based waterborne fire-retardant coating, its preparation method, and its application, belonging to the field of fire-retardant coating technology. This invention combines the advantages of functionalized MXene materials, such as high dispersibility, high temperature resistance, and excellent flame-retardant properties, using waterborne polyurethane as the resin matrix, ammonium citrate as the acid source, and MXene materials as nanostructured flame retardants to develop an environmentally friendly, high-performance reinforced waterborne fire-retardant coating. The MXene materials can be obtained through chemical modification with different functional groups (such as silane coupling agents, calixarenes, and MOFs) to introduce polar groups onto the surface. The fire-retardant coating prepared using functionalized MXene materials achieves UL-94 V-0 flame retardancy through a dual mechanism of physical barrier and "catalytic char formation," while also possessing high mechanical strength and thermal stability, making it suitable for protecting substrates such as metals and wood.

The invention relates to the field of waste heat utilization of power plants, and discloses a seawater desalination device utilizing waste heat of NGCC power plants, comprising a heat pump, wherein a heat collecting component is arranged at one end of the heat pump and a desalination mechanism is arranged at the other end, the desalination mechanism comprises a base, an upper end surface of the base is provided with an inner shell and an outer shell arranged coaxially, a heat storage component and a spraying component are arranged in the inner shell, the heat storage component comprises a mounting ring coaxially located in the inner shell, a plurality of heat storage plates are arranged in an array along a circumferential direction in the mounting ring, the interior of the heat storage plate is hollow and heat storage tubes are arranged, one end of the heat storage tubes in the plurality of heat storage plates is connected through a main input tube, and the other end is connected through a main output tube, two ends of a condenser of the heat pump are respectively connected with the main input tube and the main output tube, the spraying component is used for drawing seawater to spray toward the heat storage plate, and during spraying, the nozzle of the spraying component rotates.

The invention provides a metal surface rusty anticorrosive paint, and relates to the related technical field of marine metal surface rust prevention and conversion, when the addition amount of a nanocarbon secondary doped polyaniline composite material is in a proportion range of 0.2%-0.6%, the anticorrosive capability of a coating is remarkably improved, the distribution density of the nanocarbon secondary doped polyaniline composite material in the coating is increased, and the corrosion resistance of the coating is improved. The polyaniline composite material can form a conductive path to accommodate electrons transferred by a metal matrix and enhance the shielding effect of the coating, and meanwhile, the polyaniline composite material can make up the defects of the coating and prevent a corrosion medium from permeating the coating along gaps, so that the coating is prevented from being damaged to lose the protection capability on the metal matrix; tannic acid, gallic acid and salicylic acid are simultaneously adopted in the long-acting rust transforming agent and are matched with one another, so that the tannic acid, gallic acid and salicylic acid can form a firm complex layer with formed metal oxide or metal through chelation, and the synergistic migration protection effect is enhanced; and a relatively compact and flat conversion film can be formed on the rusted metal surface.

This invention relates to the field of yak milk processing technology, and discloses a device and method for separating active substances from yak milk, comprising: a first separation unit, a first processing unit, a pH adjustment unit, a second separation unit, and a third separation unit connected in sequence; the first separation unit is used for centrifugation of yak milk to obtain skimmed yak milk; the first processing unit is used for defoaming the skimmed yak milk; the second separation unit is used for centrifugation of the pH-adjusted skimmed yak milk to obtain supernatant and casein; the third separation unit is used for chromatographic separation of the supernatant to obtain lactoferrin and immunoglobulins. The defoaming treatment of the skimmed yak milk in the first processing unit effectively eliminates air bubbles in the skimmed milk, preventing air bubbles from occupying space and hindering the full contact between the acid solution and the skimmed yak milk, preventing local pH unevenness, improving the mixing effect of the skimmed yak milk and acid solution, increasing the casein yield, and ensuring the subsequent separation effect.

The invention discloses a preparation method of a high-stability natural plant extract bio-based paint, and relates to the technical field of paints.The preparation method comprises the following steps that 1, raw material modification is conducted, specifically, corn starch, deionized water and NaOH are mixed and gelatinized according to the mass ratio of 30: (100-110): (1-1.2) to obtain starch paste liquid, then the starch paste liquid and a graft are subjected to end sealing and grafting treatment, and modified starch emulsion is obtained; step 2, composite treatment: uniformly mixing and stirring the modified starch emulsion and the water-based alkyd resin emulsion in a mass ratio of 7: (2.9-3.1), then adding a nano cellulose whisker dispersion liquid accounting for 2-2.1 wt% of the total mass and tween-80 in a mass ratio of corn starch to the nano cellulose whisker dispersion liquid being 30: (1.1-1.2), and then stirring and mixing to obtain a dispersed composite emulsion; step 3, mixing and preparing to obtain a bio-based coating; wherein the graft is a lignosulfonate graft copolymer solution; the water-based alkyd resin emulsion is obtained by performing alcoholysis and polycondensation on soybean oil. The high-stability natural plant extract bio-based coating has the effect of improving the structural stability of the high-stability natural plant extract bio-based coating.