53 results about "Ion pairs" patented technology

The invention belongs to the technical field of thermoelectricity, and relates to a preparation method and application of a quasi-solid thermoelectric material capable of realizing humidity stability by means of phase separation regulation, the preparation method comprises the following steps: dissolving a negatively charged hydrophilic monomer, an electrically neutral monomer, a cross-linking agent and a photoinitiator in a solvent to obtain a precursor solution, and carrying out an ultraviolet polymerization reaction to form polyelectrolyte gel; mixing the eutectic solvent with an electrolyte aqueous solution containing redox ion pairs and lithium chloride to obtain a quaternary electrolyte system; and immersing the gel into a quaternary electrolyte system, and fully replacing the internal solution through a diffusion effect to obtain the quasi-solid thermoelectric material with stable humidity. The thermoelectric material has the advantages of excellent Seebeck coefficient, good stability, high mechanical strength, large power density and the like, can supply power to wearable electronic products in an actual humidity fluctuation environment, breaks through the main bottleneck of actual application of quasi-solid ionic thermoelectric materials based on ionized water gel, and is wide in application prospect.

The invention belongs to the technical field of membrane separation, and particularly relates to a preparation method and application of a high-permeability polyamide reverse osmosis membrane. According to the invention, the problems of high energy consumption and poor water production quality caused by non-ideal flux and rejection rate of the current reverse osmosis membrane product are solved, tetrabutylammonium bromide and acyl chloride form ion pairs to reduce hydrophobicity, a hydrogen bond network of urea destroys a hydrophobic barrier of an organic phase, and migration of acyl chloride to a water phase interface is promoted; the eutectic solvent is adsorbed on a water phase interface to form a'catalytic microenvironment ', amido of an amine monomer is attracted to be close to the interface, and the concentration of a reaction area is increased. During reaction, tetrabutylammonium bromide enables an amine monomer to stably attack a transition state of acyl chloride through electrostatic interaction, and reaction activation energy is reduced; urea and sodium hydroxide in a water phase can be jointly used as an acid-binding agent to neutralize generated hydrochloric acid so as to prevent amido protonation inactivation. The method is simple to operate and suitable for large-scale production.

The invention provides an electrostatic interference elimination method for an air negative ion product. The air negative ion product comprises a negative high voltage electrode and a relative electrode. Particularly, the negative air ion product is provided with a static electricity elimination mechanism which is characterized in that a negative high-voltage electrode and an opposite electrode are electrically connected through an electric conduction medium, so that high voltage formed between the negative high-voltage electrode and the opposite electrode is applied to the electric conduction medium, and negative charges are transmitted to the opposite electrode along the electric conduction medium to be neutralized with positive charges; and static elimination is realized. Furthermore, the obvious reduction of the negative ion concentration is taken as the basis for executing the static elimination mechanism, and the execution is ended after 3-10 seconds. Or the obvious reduction of the working current of the negative ion generator circuit is taken as the basis for executing the static elimination mechanism, and the execution is ended after 3-10 seconds. The problem of electrostatic interference can be effectively solved, the air negative ion product can efficiently, stably and continuously generate high-concentration air negative ions, and a positive health effect is generated for a product user.

The invention discloses an acrylate emulsion containing a zinc ion crosslinking agent and a preparation method of the acrylate emulsion, and alkali-soluble resin containing zinc ions is used as a macromolecular surfactant to prepare a self-crosslinking polyacrylate emulsion. In the emulsion polymerization process, a Zn < 2 + > metal ion cross-linking agent is introduced, so that the problem of demulsification caused by damage of high-valence metal cations in the metal ion cross-linking agent to double electric layers of the anionic acrylic emulsion is solved, the degree of cross-linking of a latex film is remarkably improved, the fineness and the particle size of the emulsion are effectively reduced, and the preparation method is simple and easy to implement. And the latex film is endowed with a certain antibacterial function.

The application relates to the field of wastewater treatment catalysis, and discloses a Fe-Cu-Mn ternary hydrotalcite-like catalyst and a preparation method thereof, which comprises iron, copper and manganese; the iron, copper and manganese are distributed in the layer plate metal central site in an atomic dispersion mode; the layer plate oxygen octahedron is in a non-symmetrical stretching distortion state; a 3.2-4.8 degree deviation is generated in the manganese oxygen copper bond angle in the layer plate; the lattice parameter a of the layer plate 110 crystal face direction is 0.305-0.312 nm; the molar ratio of copper to manganese is 1:2-1:5; and the molar sum of copper and manganese to the molar ratio of iron is 2:1-4:1. According to the application, the lattice non-symmetrical distortion induces the space overlap of the auxiliary metal and the iron active center orbit, an electron transfer path is constructed, the shielding effect of the hydroxyl ion on the iron active site under the alkaline environment is eliminated, the catalytic site activity is maintained, and stable and efficient catalytic treatment under wide pH working conditions is realized.

This invention provides an ion-doped calcium oxalate thermochemical heat storage material and its preparation method, the chemical formula of which is Ca. 1‑ x M x C2O4·H2O, where M is a dopant ion and x is the mole fraction of the dopant ion; M includes Mg 2+ Co 2+ Zn 2+ 、Sr 2+ One or more of the following. This invention regulates the lattice parameters, local coordination environment, defect state, and microstructure of calcium oxalate by doping with ions. While maintaining the original reversibility and cycle stability of the calcium oxalate system, it further optimizes its dehydration thermal storage temperature range, thermal response boundary, structural evolution behavior, and application compatibility materials, thereby improving the thermochemical thermal storage performance of calcium oxalate from the internal structural level.

The invention discloses a Sm / Ce / Ni / Fe / Hf doped BSBNT-based ceramic material with high energy storage density under a low electric field and a preparation method thereof, aiming at Bi < 3 + >, Na < + >, Ba < 2 + > and Sr < 2 + > ions at the A site of a (Bi0. 5Na0. 5) 0.6 (Ba0. 3Sr0. 7) 0.4 TiO3 ceramic material, composite high-valence ions [Sm0. 8Ce0. 2] 3.2 < + > composed of Sm < 3 + > and Ce < 4 + > with coordination of 12 are used for doping and substitution, aiming at Ti < 4 + > ions at the B site, composite low-valence ions [Ni0. 25Fe0. 35Hf0. 4] 3.15 < + > composed of Ni < 2 + >, Fe < 3 + > and Through the composite doping modification, the dielectric temperature stability is improved while the high Pmax is maintained, the Pr is reduced and the effective energy storage density of a unit electric field is improved, so that a novel environment-friendly energy storage ceramic material with excellent comprehensive electrical properties under a low electric field is provided.

An ion-pair-bound homogeneous catalytic system, and a method for synthesizing 5-hydroxymethylfurfural. The homogeneous catalytic system comprises a quaternary ammonium salt, a homogeneous acid and water. The method comprises: mixing fructose with an ion-pair-bound homogeneous catalytic system to form a homogeneous catalytic reaction system; reacting the homogeneous catalytic reaction system under reduced pressure, and after the completion of the reaction, adding a quenching agent to quench the reaction; extracting the obtained reaction mixture; and then respectively separating 5-hydroxymethylfurfural and the ion-pair-bound homogeneous catalytic system from a light phase and a heavy phase formed after the extraction. The reaction can achieve the simple, safe and efficient synthesis of 5-hydroxymethylfurfural under mild conditions; the conversion rate of the raw material fructose is high; the yield of the target product, i.e., 5-hydroxymethylfurfural, is high; and the separation operation can be conveniently conducted. Moreover, the used ion-pair-bound homogeneous catalytic system that is formed from a quaternary ammonium salt, a homogeneous acid and water is convenient to recover and reuse. Therefore, the method is environmentally friendly and economical, and has broad application prospects.

The invention discloses an Nd / Ce / Co / Al / Mn doped BSBNT-based ceramic material with high energy storage density under a low electric field and a preparation method thereof, aiming at Bi < 3 + >, Na < + >, Ba < 2 + > and Sr < 2 + > ions at the A site of a (Bi0. 5Na0. 5) 0.6 (Ba0. 3Sr0. 7) 0.4 TiO3 ceramic material, composite high-valence ions [Nd0. 8Ce0. 2] 3.2 < + > formed by Nd < 3 + > and Ce < 4 + > with coordination of 12 are used for doping and substitution, aiming at Ti < 4 + > ions at the B site, composite low-valence ions [Co0. 2Al0. 5Mn0. 3] 3.1 < + > formed by Co < 2 + >, Al < 3 + > and Mn < 4 + Through the composite doping modification, the dielectric temperature stability is improved while the high Pmax is maintained, the Pr is reduced and the effective energy storage density of a unit electric field is improved, so that a novel environment-friendly energy storage ceramic material with excellent comprehensive electrical properties under a low electric field is provided.

This invention relates to the field of slickwater technology, specifically to a high-efficiency proppant-carrying slickwater. It comprises a shear-responsive smart thickener and inorganic salts dispersed in an aqueous phase; the smart thickener is composed of ABA-type temperature-ion dual-responsive block copolymers and nano-silica particles with surface-grafted hydrophobic alkyl chains and cationic groups. The slickwater of this invention exhibits ultra-low viscosity and high drag reduction during the pumping stage (low temperature, high shear); upon entering a fracture, the synergistic effect of temperature rise and instantaneous high-speed shear triggers hydrophobic association of the copolymer and interweaving of the nanoparticles, forming a three-dimensional network structure; under the low-shear environment within the fracture, the network structure self-reinforces through ordered reconstruction of ion pairs, achieving high-viscosity proppant carrying. Its core lies in transforming the inherent temperature rise and shear effects of the process into a driving force for constructing a proppant-carrying network, thereby effectively resolving the contradiction between low-friction pumping and high proppant carrying capacity in slickwater volumetric fracturing and significantly reducing reservoir damage.

The invention relates to tellurate glass for a temperature sensor and a preparation method of the tellurate glass, and belongs to the technical field of optical luminescent materials. TeO2, ZnO, ZnF2 and Gd2O3 are used as matrixes of the tellurate glass, Er2O3 and YbF3 are doped, and the preparation method comprises the following steps: grinding and heating the raw materials, annealing and polishing. The prepared tellurate glass has low phonon energy, high chemical stability, excellent thermal stability and high rare earth ion solubility. More importantly, a specific rare earth ion pair in the glass can generate two fluorescence emission peaks of which the intensity is sensitively changed along with the temperature under the pumping of a specific wavelength (such as 980nm), and high-precision temperature sensing can be realized by monitoring the fluorescence intensity ratio of the two fluorescence emission peaks. The preparation process is simple, the cost is low, and the obtained glass material has a wide application prospect in the field of non-contact optical temperature sensors.

The application relates to a method for quantitatively detecting the concentration of thioctic acid in human plasma by liquid chromatography-tandem mass spectrometry, and belongs to the technical field of biological sample detection. The method comprises the following steps: EDTA-K2 anticoagulant human plasma is taken, thioctic acid-d5 internal standard working solution is added, the mixture is uniformly mixed, acetonitrile is added to precipitate proteins, the supernatant is taken by centrifugation and is diluted; a C18 chromatographic column is used, 0.1% acetic acid aqueous solution and acetonitrile are used as mobile phases for gradient elution; mass spectrometric detection adopts an electrospray ion source negative ion mode and a multiple reaction monitoring mode, the ion pair of thioctic acid is m / z 205.100->171.100, and the ion pair of the internal standard is m / z 210.050->174.100; the peak area ratio is used as a quantitative index, 1 / C 2 weighted linear regression is used to establish a standard curve. The method has the advantages of simple pretreatment, high sensitivity, rapid analysis, strong anti-matrix interference ability, and is suitable for the detection of conventional and hemolytic and hyperlipidemic plasma samples, and can be used for pharmacokinetic research and clinical detection of thioctic acid.

A method for tracing the migration path of migrating ions in a solid-state battery. The method comprises the following steps: (1) adding an ion donor material to a solid-state battery, and then subjecting the solid-state battery to a charge and discharge cycle, wherein the solid-state battery comprises migrating ions, the ion donor material is used for providing exogenous ions, the exogenous ions and the migrating ions have the same valence state and similar ion radii, and the atomic number of the exogenous ions is higher than that of the migrating ions; and (2) subjecting the solid-state battery which has completed a charge and discharge cycle to characterization analysis, so as to determine the migration path of the exogenous ions, and using the migration path as the migration path of the migrating ions in the solid-state battery. By means of using the tracing method, the migration path of migrating ions in a solid-state battery, especially in a positive electrode and a solid electrolyte of the solid-state battery, can be graphically characterized.

The invention discloses a La / Ce / Ni / Ga / Zr doped BSBNT-based ceramic material with high energy storage density under a low electric field and a preparation method thereof, aiming at Bi < 3 + >, Na < + >, Ba < 2 + > and Sr < 2 + > ions at the A site of a (Bi < 0.5 > Na < 0.5 >) < 0.6 > (Ba0. 3Sr < 0.7 >) < 0.4 > TiO < 3 > ceramic material, composite high-valence ions [La0. 7Ce0. 3] < 3 + > are formed by La < 3 + > and Ce < 4 + > with 12 coordinates for doping substitution, and aiming at Ti < 4 + > ions at the B site, composite low-valence ions [Ni0. 3Ga0. 3Zr0. 4] < 3.1 + > are formed by Ni < 2 + >, Ga < 3 + > and Zr Through the composite doping modification, the dielectric temperature stability is improved while the high Pmax is maintained, the Pr is reduced and the effective energy storage density of a unit electric field is improved, so that a novel environment-friendly energy storage ceramic material with excellent comprehensive electrical properties under a low electric field is provided.

The present invention relates to the field of controlled nuclear fusion in nuclear energy applications. The title of the present invention is a positive-ion circular-collision nuclear fusion reactor. The technical problems to be solved by the present invention are: the nuclear fusion reaction times are short and the energy gains Q are less than 1. Our technical solution is: using an accelerator to accelerate hydrogen isotope positive ions to (0.1-3) Mev, and then inducing nuclear fusion reactions by circular collision. In the past, it was believed that the probability of inducing nuclear fusion by collision was less than 0.0001. We simultaneously employ five technical schemes to solve the problem of low probabilities of positive ion collision-induced nuclear reactions: 1. using the accelerator to accelerate the positive ions to (0.1-3) Mev; 2. using circular collision to induce nuclear fusion; 3. enabling collision in a collision area having a large cross section; 4. enabling collision in a long collision area; and 5. using a plurality of sets of electromagnetic lenses to focus ion beams to increase the ion density. In the present invention, energy generated by nuclear fusion is converted into heat energy in an energy conversion area, and then high-pressure steam is generated for power generation.

The utility model discloses a negative ion machine which comprises a shell, a negative ion working cavity and an ionization assembly mounting cavity which are divided by a bottom plate are arranged in the shell, and ionization plate assemblies are arranged in the negative ion working cavity and are divided by partition plates in the negative ion working cavity to form a plurality of negative ion generating cavities. A working opening communicated with the outside is formed in the cavity wall of the negative ion generating cavity, negative ions formed in the generating cavity can be rapidly released into surrounding air, the air purification efficiency is improved, meanwhile, an indicator lamp is arranged outside the shell, a control assembly can visually and rapidly control the negative ion machine, and the negative ion machine is convenient to use. And an inclined switch is arranged in the mechanism, a power source can be automatically turned off in time after the mechanism topples over, negative ions released after toppling over are effectively prevented from influencing the contact face, use safety is improved, a connecting part is arranged at the bottom of the shell, a support can be externally connected, the mechanism can be suitable for multiple use scenes, and use is more convenient.

The invention relates to the technical field of high polymer materials, in particular to a preparation method of a functionalized polylipoic acid material based on a lipoic acid-amine molecular eutectic system. According to the polymer material, lipoic acid is used as a hydrogen bond donor of a eutectic system, amine molecules are used as a hydrogen bond acceptor, ion pairs are formed through interaction of carboxyl and amino, and then a room-temperature eutectic system is constructed; the diffusion performance of LA and the activation state of disulfide bonds are guaranteed in the system, spontaneous ring opening polymerization of LA at room temperature is induced, and finally the functionalized polylipoic acid material is formed. The polymer material is endowed with excellent self-repairing performance and high tissue adhesion performance by utilizing dynamic disulfide bonds and carboxylic acid groups in lipoic acid molecules, and meanwhile, the microstructure of a polymer network is regulated and controlled by virtue of multiple non-covalent interaction between amine molecules and lipoic acid; the multifunctional polylipoic acid material with good biocompatibility, strong tissue adhesion and efficient self-healing performance can be simply and efficiently prepared.

1. The name of the design product: negative ion air purifier. 2. The use of the design product: a kind of environmental optimization equipment using negative ions to purify, dust, deodorize and sterilize air. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective drawing.

A sensor for gas species in water includes two membranes separating first, second and third chambers. The first and second chambers are separated by an ion exchange membrane, and the second and third chambers are separated by a gas permeable membrane. Water electrolysis in the first and second chambers provides analyte-ions corresponding to an analyte being detected that pass through the ion exchange membrane from the first chamber to the second chamber. Within the second chamber, these analyte-ions generate analyte via the electrolysis. Analyte in the second chamber passes through the gas permeable membrane to arrive at the third chamber. Within the third chamber, the analyte-ion is generated chemically from the analyte. Electrical detection of the analyte-ion in the third chamber provides sensing of the analyte present in the first chamber.

The invention provides an electrochemical sensor and a metal ion detection method thereof, and relates to the technical field of water quality detection. The electrochemical sensor provided by the invention comprises a sensor body, the sensing electrodes are arranged on the surface of the sensor body, and the sensing electrodes comprise a detection electrode, a reference electrode and a hydrogen ion indication electrode; and the ion selective permeable membrane covers the surface of at least one of the detection electrode and the hydrogen ion indication electrode. The corresponding target hydrogen ions or metal ions in the solution are screened through the selective permeable membrane on the sensor body. The pH value of the solution is measured through the hydrogen ion indicating electrode, and the concentration of the measured ions is calibrated through the hydrogen ion indicating electrode, so that the interference of the pH value of the solution on the measurement is reduced. The concentration of the metal ions is detected through the detection electrode, and the concentration of the detected ions is calibrated, so that the interference of interference ions on the detected ions is reduced, and the accuracy and the stability of the test are improved.

The application discloses a kind of covalent organic framework material for xenon gas nitrogen separation and its preparation method and application, select the high affinity of metal ions to phenanthroline, and prepare two-dimensional and three-dimensional covalent organic framework with it as monomer respectively;Periodically arranged phenanthroline covalent organic framework structural unit can provide a large number of adsorption sites for metal ions, at the same time, using the strong adsorption of metal ions to Xe, introduce metal ions as accessible polar sites on the surface of covalent organic framework pore, enhance its ability to induce Xe polarization, improve its adsorption separation efficiency;The material prepared by the application has good xenon gas nitrogen separation performance, after adsorbing nickel ions, the xenon adsorption capacity of covalent organic framework is increased by 2.24 times, the xenon adsorption capacity can reach 8.7 cm 3 / g under the condition of 298 K, 1 bar, and IAST selectivity can reach 3.8.The organic covalent framework gas separation performance presented by the application is good, and it has important significance for high-performance xenon gas nitrogen separation.

The invention relates to a bisoprolol long-acting transdermal absorption patch, and belongs to the technical field of medicines. The percutaneous absorption patch disclosed by the invention is suitable for being applied for three days, and consists of a backing layer, a medicine-carrying pressure-sensitive adhesive layer and an anti-sticking layer. The drug-loading pressure-sensitive adhesive layer comprises a bisoprolol organic acid ion pair compound, a pressure-sensitive adhesive and a percutaneous absorption enhancer. Wherein the weight of the bisoprolol organic acid ion pair compound accounts for 5-45wt% of the total weight of the medicine-carrying pressure-sensitive adhesive layer, the weight of the pressure-sensitive adhesive accounts for 50-90wt% of the total weight of the pressure-sensitive adhesive layer, and the dosage of the percutaneous absorption enhancer accounts for 1-20wt% of the total weight of the pressure-sensitive adhesive layer. Wherein in the bisoprolol organic acid ion pair compound, the molar ratio of bisoprolol free alkali to different organic acids is (0.5: 1)-(2: 1). The patch is simple in preparation technology and low in cost, realizes constant-speed drug release, provides a continuous treatment effect of at least three days, and is beneficial to control of symptoms and disease progression; and the method is safe, effective, good in stability and convenient to use.

This invention discloses a Pt / CoMn2O4 / Na2S2O8 catalyst, its preparation method, and its application, belonging to the field of catalysis technology. The preparation method includes the following steps: S1. Adding a dispersant and a free radical scavenger to a soluble platinum source aqueous solution, degassing, and then... 60 S2. Pt nanoparticles are obtained by irradiation reduction under Co-γ rays; S3. The Pt nanoparticles are mixed evenly with a CoMn2O4 aqueous dispersion to allow surface deposition, and then dried to obtain Pt / CoMn2O4; S4. Na2S2O8 is added to the Pt / CoMn2O4 aqueous dispersion and mixed evenly to allow Na2S2O8 to deposit on the Pt / CoMn2O4 surface, and then dried to obtain the Pt / CoMn2O4 / Na2S2O8 catalyst. This invention reduces the band gap of the Pt / CoMn2O4 catalyst by adding Na2S2O8, increasing the sulfate and hydroxyl radicals on the catalyst surface, causing changes in the valence states of Co and Mn elements in CoMn2O4, and generating more Mn. 2+ / Mn 3+ / Mn 4+ Ion pairs with Co 2+ / Co 3+ The ion pairs are increased, and the number of oxygen vacancies and active sites in CoMn2O4 are increased, thereby enhancing the catalytic performance of the catalyst.

The invention provides a 4.6 V high-voltage lithium metal battery electrolyte adaptive to a commercial load ternary positive electrode and a preparation method and application of the 4.6 V high-voltage lithium metal battery electrolyte, the electrolyte belongs to a local high-concentration ester-based electrolyte, a diluent 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether or 1, 1, 2, 3, 3, 3-hexafluoropropyl-2, 2, 2-trifluoroethyl ether is added into the high-concentration electrolyte, and the high-concentration electrolyte is prepared through the following steps: adding a diluent into the high-concentration electrolyte; the first solvation shell layer of the electrolyte maintains a solvation structure which takes contact ion pair (CIP) / aggregated ion pair as a main component (AGG and AGG +) under high concentration, improves the ionic conductivity, reduces the viscosity and cost of the electrolyte, promotes formation of a stable and firm SEI film, realizes compact and uniform deposition of lithium metal, and remarkably improves the cycle performance of the lithium metal battery; meanwhile, due to the high oxidation resistance of the ester-based solvent and the local high-concentration solvation structure formed by the electrolyte, the decomposition of the electrolyte and the cracking of the positive electrode are effectively inhibited.

The application belongs to the field of water treatment equipment and application technology, and particularly relates to a selective electrodialysis device and application thereof. The selective electrodialysis device comprises an electrodialysis cell, an anode and a cathode arranged on the two sides of the electrodialysis cell, and a cation exchange membrane and an anion exchange membrane arranged between the anode and the cathode in sequence. The cation exchange membrane is made of sulfonated polybenzimidazole as a base material, and the surface of the cation exchange membrane is coated with polystyrene sodium sulfonate containing porous micro-nano materials. A protective layer containing polydiphenylpiperidine is coated on the side of the cation exchange membrane facing the anode. The anion exchange membrane is made of quaternary amine polyfluorosulfone or polyether sulfone as a base material, and the surface of the anion exchange membrane is coated with polydimethyl diallyl ammonium chloride. The device can efficiently separate monovalent ions and polyvalent ions, the functionalization of the ion exchange membrane increases the membrane charge density, promotes the rapid migration of ions under the action of an electric field, and improves the ion transfer rate. The device is stable in operation, has a high separation rate and a high current efficiency.

The invention relates to a mass spectrum technology, and particularly provides a method for reducing mass discrimination of a micro-channel plate, which comprises the following steps: A1, ions are ejected by an electric field of a third electrode, pass through a first electrode and a second electrode after passing through a field-free region, and are received by the micro-channel plate to obtain ion flight time information of a mass section; a2, the flight time t and the ion strength St of the selected mass-to-charge ratio ions are obtained; a3, at the flight time t, pulse voltage U is applied to the second electrode, and the energy X of ions incident to the micro-channel plate and the corresponding ion strength S output by the micro-channel plate are obtained; a4, adjusting the pulse voltage, returning to the step A3 to obtain multiple groups of data pairs (Si, Xi), i = 1, 2... N; a5, the mapping relation S = f (X) between the data pairs (Si, Xi) is obtained through the data pairs (Si, Xi); and A6, obtaining a pulse voltage value corresponding to the ions by using the mapping relation. The method has the advantages of prolonging the service life of the detector and the like.

The present invention provides a surface treatment method of cerium oxide, comprising S1: adding a first additive to deionized water, stirring uniformly, adding cerium oxide particles, and then transferring the solution to an ultrasonic tank, ultrasonically dispersing it for 10-90 min until the cerium oxide particles are dispersed uniformly; S2: adding a second additive to the above dispersed solution, stirring uniformly, transferring it to an ultrasonic tank, ultrasonically dispersing it for 30-180 min, until the cerium oxide particles are evenly dispersed. By adding cation-containing polymer molecules, polymerized ion pairs are achieved through charge attraction, realizing double-layer coating on the surface of cerium oxide. The double-coated cerium oxide particles have a high polishing rate and leveling efficiency, much higher than the traditional alkaline ILD polishing solution with silicon oxide as the abrasive particle.

This invention belongs to the field of lithium-ion and lithium metal battery technology, and provides a carboxylic acid ester-based compound and its preparation method, an electrolyte solvent, and an electrolyte. The compound provided by this invention has a carboxylic acid ester skeleton. Utilizing its low viscosity characteristics, it works in conjunction with highly flexible silicon-oxygen chains to effectively disrupt the crystallization arrangement of the solvent molecules, reducing the freezing point and low-temperature viscosity of the electrolyte solvent. This ensures excellent liquid flowability and ion transport kinetics of the electrolyte at low temperatures, thereby guaranteeing good electrochemical performance of the lithium-ion battery at low temperatures. The silicon-oxygen bond and fluorine atoms can jointly regulate the solvation structure, weakening the interaction between the solvent molecules and Li through steric hindrance and electronic effects. + The binding energy barrier induces lithium salt anions to enter the first solvated sheath layer, forming more contact ion pairs and aggregates, enabling preferential decomposition of anions and construction of a stable interface layer rich in inorganic matter, dense, and with high ionic conductivity. This effectively inhibits lithium dendrite growth and side reactions, while improving the antioxidant stability and safety of the electrolyte.

The invention relates to the technical field of test analysis, in particular to a cefditoren pivoxil related substance detection method, which adopts a high performance liquid chromatograph for testing, takes a sodium dihydrogen phosphate solution-acetonitrile-methanol system as a mobile phase, and adds an alkyl sodium sulfonate anion pair reagent into the mobile phase. A neutral ion pair with higher hydrophobicity is formed by the cefditoren acid and the-NH2 group in the cefditoren acid delta 3 isomer, and is in a molecular form, so that the retention time of the neutral ion pair on a chromatographic column is prolonged; meanwhile, the pH value of a sodium dihydrogen phosphate solution is controlled to enable a mobile phase to be acidic, so that-COOH ionization is inhibited, the interaction between ion pairs and a hydrophobic stationary phase in a reversed-phase chromatographic column is improved, proper retention of 14 related substances including the cefditoren acid and the cefditoren acid delta 3 isomer is realized, meanwhile, the 14 related substances are effectively separated, and the quality of the related substances is improved. The detection accuracy and the detection efficiency of the cefditoren pivoxil related substances are improved.

The high-temperature-resistant and impact-resistant coating comprises an injection layer, a transition layer and a functional layer which are sequentially arranged on the surface of a workpiece from inside to outside, the injection layer is obtained by cleaning the surface of the workpiece through ions, the transition layer comprises a Cr layer and a CrN layer which are sequentially arranged from inside to outside, the Cr layer and the CrN layer are both prepared through a sputtering method, and the functional layer is prepared through a high-temperature-resistant and impact-resistant coating. The functional layer comprises a growth layer, a breaking layer and a performance layer located on the outermost layer, the growth layer and the performance layer are arranged at intervals in a staggered mode, the growth layer and the performance layer are CrAlSiWN layers prepared through pure ion plating, and the breaking layer is a CrN layer prepared through a sputtering method. By reducing the pressure during deposition, reducing energy loss caused by collision in the film deposition process and reducing ionic groups, large particles and the like generated in the film material ionization process, the deposited film is more compact, and the hardness of the coating is improved; internal stress is reduced through a fine grain strengthening technology, an interlayer strengthening technology and a gradient structure, the impact resistance of the coating is improved, and the high-temperature resistance of the coating is improved through element doping.