8results about How to "Reduce electrostatic attraction" patented technology

The invention relates to a cleaning agent used after SiC substrate grinding and a preparation method thereof, and relates to the field of semiconductor cleaning agents, and the cleaning agent is prepared from the following raw materials by mass: 4-8% of an anionic surfactant, 2-6% of a nonionic surfactant, 2-6% of a cleaning auxiliary agent, 8-12% of sodium hydroxide, 2-4% of a bio-based modified antistatic agent, and the balance of water. The preparation method comprises the following steps: heating water, adding sodium hydroxide, stirring, adding the cleaning aid, stirring, adding the premixed anionic surfactant and nonionic surfactant, stirring, adding the bio-based modified antistatic agent, stirring, cooling, and filtering to obtain the cleaning agent for grinding the SiC substrate. The cleaning agent has a good cleaning effect, can effectively remove impurities after grinding, and meets the requirement of the semiconductor industry for high-quality cleaning of SiC wafers.

This invention relates to the field of traditional Chinese medicine processing, and discloses a compound polysaccharide immune-enhancing composition and its preparation method and application. The composition comprises raw materials made from refined Polygonatum sibiricum polysaccharide, refined Dendrobium officinale polysaccharide, refined Lycium barbarum polysaccharide, and mogroside. The polysaccharides are mixed, and mogroside is added in batches with stirring and homogenization. The mixture is then dried under low temperature vacuum and granulated to produce the finished product. Mogroside molecules penetrate into the polysaccharide aggregates and reconstruct hydrogen bonds, establishing steric hindrance and rearranging charge distribution, inhibiting secondary aggregation of polysaccharides during rehydration and improving dissolution rate. Combined with step-by-step feeding and controlled moisture content, the polysaccharide conformation is solidified, preventing moisture absorption and clumping during storage and maintaining the flowability of the finished product. Purification of the polysaccharides reduces steric hindrance interference from impurities such as proteins and lignin, allowing active binding sites to be fully exposed and bind to corresponding receptors on the surface of different immune cells, thus initiating signal transduction pathways.

The utility model discloses an accelerometer belongs to acceleration measurement technical field, and the accelerometer includes: outer frame and mass block, and the outer frame is connected in substrate, and the substrate is equipped with fixed anchor point, and the mass block is located the inside of outer frame and is elastically connected to fixed anchor point with substrate through elastic part, and the mass block can move along the acceleration direction to be measured, and the mass block is suitable for along the first axis symmetry and along the second axis asymmetry, and the first axis extends along the first direction, and the second axis extends along the second direction, one of mass block and outer frame is equipped with stopper, and the interval between the other of mass block and outer frame and stopper is less than the interval between the mass block and outer frame of the area outside stopper. The utility model embodiment adopts and sets up stopper in one of mass block and outer frame, thereby reduces the relative area of the close part between mass block and outer frame, reduces the electrostatic attraction, reduces the deviation distance simultaneously, and then improves the accuracy of accelerometer measurement acceleration.

The utility model relates to the technical field of packaging paper feeding and cutting, and discloses a paper stirring piece separating structure of chain type transmission paper feeding equipment, which comprises a separating plate fixed on a rack, a plurality of air outlet grooves are uniformly arranged at the upper part of the separating plate, a communicating pipe is arranged on one side of each air outlet groove, the communicating pipe is connected with an air flow cleaner, and the air flow cleaner is connected with an air inlet pipe of the chain type transmission paper feeding equipment. And a stripping plate is arranged at the upper part of the communicating pipe and is used for stripping the adsorbed paper. According to the utility model, a'mechanical + pneumatic 'double-acting separation mode is formed through sequential cooperation of stripping elastic sheet mechanical triggering and high-pressure airflow, the problem of electrostatic adsorption of multiple pieces of paper is effectively solved, the separation efficiency is improved by more than 40%, the airflow cleaner directionally sprays compressed air through the air outlet groove, static electricity on the surface of the paper is neutralized while a physical isolation layer is formed, and the separation efficiency is improved. And the electrostatic adsorption force is reduced to 0.5 N or below, so that secondary adhesion is fundamentally avoided.

The present application belongs to the technical field of oil and gas exploitation, and relates to a nano desorption agent for gas well and a preparation method thereof. The desorption agent uses special pretreated biochar as a core carrier, loads specific proportion of bimetallic oxide nanoparticles, and is supplemented with an environmentally friendly surfactant for surface modification. Through the synergistic effect of nano size effect, catalysis / electron transfer effect of metal oxide, physical adsorption and pore transport effect of biochar, and interfacial tension reduction effect of surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is significantly reduced, and the efficient desorption is promoted. At the same time, all components and preparation processes are environmentally friendly and harmless to human body.

The invention belongs to the technical field of nano-antibacterial materials, and provides a micromolecule coated nano-zinc oxide monodisperse antibacterial colloid, the colloid comprises nano-zinc oxide powder, a dispersant and water, the total mass ratio of the nano-zinc oxide powder to the dispersant is (1: 1)-(10: 1), the mass ratio of the nano-zinc oxide powder to the water is (1: 100)-(1: 10000), the total mass ratio of the nano-zinc oxide powder to the dispersant is (1: 1)-(1: 10000), and the mass ratio of the nano-zinc oxide powder to the water is (1: 100)-(1: 10000). The diameter of the nano zinc oxide particles in the colloid is 60 nm to 100 nm. According to the invention, the micro-molecular dispersant is introduced to modify the nano-zinc oxide, and the total mass ratio of the nano-zinc oxide powder to the dispersant and the mass ratio of the nano-zinc oxide powder to water are optimized, so that the nano-zinc oxide can be completely coated with the nano-zinc oxide powder by micro-molecules, and the surface energy of the nano-zinc oxide and Van der Waals force and electrostatic attraction among particles are reduced; and the dispersion performance of the nano-zinc oxide in water can be improved.

The utility model discloses a kind of boron powder efficient stirring mixing devices, including mixing tank, the upper end middle part of the mixing tank is connected with stirring equipment, the upper end side of the mixing tank is connected with spray tank, the lower end of the spray tank is connected with conical conveying cover, the lower end of the conical conveying cover extends into mixing tank, one week of the spray tank is connected with four spray pipes at equal intervals, the upper end of the spray pipe is connected with conveying pipeline.The utility model can effectively solve the problem that boron powder particle agglomerates, barrel wall adheres and deposits bottom, make boron powder and additive, rare earth atomized liquid fully mix, greatly improve the uniformity of mixing, to improve the quality and performance of product, while stirring equipment further strengthens surface coating effect, reduces electrostatic adsorption, so that additive and rare earth atomized liquid can better adhere to boron powder particle surface, improve the stability and functionality of boron powder, reduce the waste of raw material, improve the utilization of raw material.

The invention discloses a laundry detergent based on a polyoxyethylene block Gemini quaternary ammonium salt bactericide and a preparation method thereof, and belongs to the technical field of wash supplies. The laundry detergent disclosed by the invention is prepared from the following components in percentage by mass: 20 to 25 percent of anionic surfactant, 1 to 5 percent of nonionic surfactant, 3 to 7 percent of polyoxyethylene block Gemini quaternary ammonium salt bactericide, 1 to 4 percent of viscosity modifier, 0.1 to 0.5 percent of stabilizer, 0.2 to 1 percent of enzyme, 0.05 to 0.2 percent of preservative, 0.1 to 2 percent of functional aid, 0.1 to 1.5 percent of essence and the balance of deionized water. A side-chain polyoxyethylene chain segment is embedded into a hydrophilic head group of the quaternary ammonium salt bactericide, and electrostatic attraction with an anionic surfactant is reduced through steric hindrance, so that the quaternary ammonium salt bactericide stably coexists with the anionic surfactant; the technical problem that an existing laundry detergent taking an anionic surfactant as a main active matter is difficult to realize triangular balance of sterilization, decontamination and stability is solved.