950 results about "Hydrogen bond" patented technology

The invention relates to the field of preparation of polyurethane damping materials, in particular to a preparation method of a repairable polyurethane damping material based on multiple hydrogen bonds and metal coordination. Compared with a traditional damping material, the damping material has a higher damping temperature range and has a good damping effect at the temperature of-20 DEG C to 60 DEG C. Multiple reversible hydrogen bonds are introduced through diamine containing amido bonds, the material is endowed with self-repairing and high mechanical strength, and damping and self-repairing performance is further enhanced through pyridine nitrogen atom metal coordination. Starting from molecular structure design, multiple hydrogen bonds and metal-ligand coordination bonds constructed on a polyurethane molecular main chain play a role in synergistic enhancement, energy can be effectively dissipated through dissociation and recombination of the multiple hydrogen bonds and fracture and association of the metal coordination bonds, and the energy consumption is reduced. The polyurethane material is endowed with excellent damping performance and self-healing capability by the dual dynamic action.

The invention discloses a multi-network anti-freezing hydrogel electrolyte, a preparation method thereof and application of the multi-network anti-freezing hydrogel electrolyte in an electrochemical device. The hydrogel is prepared by using polyvinyl alcohol (PVA) and polyacrylamide (PAM) to form a basic network skeleton, introducing phytic acid, ethylene glycol and lithium / zinc bimetal salt (Li2SO4 / ZnSO4), and carrying out thermal initiation polymerization and freeze thawing. The hydrogel prepared by the invention has a multiple physical cross-linked network formed by polymer molecular chain entanglement, hydrogen-bond interaction among functional groups and metal coordinate bonds constructed between phosphate groups and divalent metal ions, so that the hydrogel electrolyte has excellent mechanical properties. Due to introduction of ethylene glycol, formation of ice crystals is effectively inhibited, and the hydrogel is endowed with excellent anti-freezing performance; the high-concentration Li < + > and Zn < 2 + > ensure the high ionic conductivity. The supercapacitor assembled by using the hydrogel electrolyte shows relatively high specific capacitance and good capacitance retention rate under bending and freezing conditions, and has good electrochemical properties and safety performance.

Disclosed in the present invention are a gel having a regulatable free water content and morphology, a preparation method therefor, and the use thereof. The method comprises: S1, preparing a solution A from a natural polymer material; S2, mixing a small molecule material containing a positively charged polar group with the solution A to obtain a composite solution B; S3, mixing the composite solution B with a regulator to obtain a composite solution C, stirring same, then adding a condensing agent to the reaction system, and carrying out a curing crosslinking reaction; and S4, removing the regulator and the condensing agent to obtain the gel. By adjusting the concentrations of the natural polymer material and the regulator, gels having different morphologies can be prepared; the gel undergoes a physical process to remove hydrogen bond interaction between the gel and free water, so that the content of free water attached to the surface of the gel can be regulated, thereby regulating the physical and chemical properties of the gel. The gel of the present invention has regulatable morphology and controllable elastic modulus, and has many advantages such as good lubrication effect, good biocompatibility and biodegradability, capability of being biologically active, and capabilities of stimulating cell growth and accelerating wound repair.

The invention provides a bio-based super-hydrophobic coating magnesium alloy material with anti-icing and corrosion-resistant functions as well as a preparation method and application of the bio-based super-hydrophobic coating magnesium alloy material. According to the material, a polylipoic acid-metal ion-hydrophobic carbon black coating is constructed on the surface of the pretreated magnesium alloy, so that the key problems that the corrosion rate of the magnesium alloy is high and the surface of the magnesium alloy is easy to freeze in practical application are solved. The coating is firmly combined with a matrix through multiple hydrogen bond effects, and the coating is endowed with rapid self-repairing capability by virtue of synergistic dynamic effects of disulfide bonds, hydrogen bonds and metal coordinate bonds. And meanwhile, the doped hydrophobic carbon black particles obviously improve the surface super-hydrophobic performance. The self-repairing characteristic is combined with the super-hydrophobic structure, so that corrosion medium infiltration is effectively blocked, and the corrosion process of the magnesium alloy is greatly delayed. In addition, the coating has photo-thermal and electrothermal effects, active anti-icing and efficient deicing can be achieved, and the application potential of the magnesium alloy in a severe environment is remarkably expanded.

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

The invention belongs to the technical field of high polymer materials and electric power engineering protection, and particularly relates to an MPP power cable protection pipe containing a rare earth anti-aging system and a preparation method of the MPP power cable protection pipe. The protection tube is composed of rare earth coordination modified polypropylene, N, N '-bis (2-hydroxyethyl) adipamide, an antioxidant 1010, a light stabilizer 622, a hindered amine light stabilizer 944, a lubricant and an anti-ultraviolet absorbent. Rare earth ions and polypropylene grafted maleic anhydride form a stable coordination structure, small organic molecules enhance interface bonding through hydroxyl and acylamino hydrogen bonds, and multi-point stability of molecular chains is achieved. The thermal oxidation resistance, ultraviolet aging resistance and thermal deformation resistance of the material are remarkably improved, and the prepared cable protection tube has excellent mechanical strength, heat resistance and long-term weather resistance.

The application belongs to the field of polymer materials and power engineering protection technology, and particularly relates to a MPP power cable protection pipe containing a rare earth anti-aging system and a preparation method thereof. The protection pipe is composed of rare earth coordination modified polypropylene, N,N'-bis(2-hydroxyethyl)adipamide, antioxidant 1010, light stabilizer 622, hindered amine light stabilizer 944, lubricant and ultraviolet absorption agent. Rare earth ions and polypropylene grafted maleic anhydride form a stable coordination structure, and organic small molecules enhance the interface combination through hydrogen bonds of hydroxyl and amide groups, so that the molecular chain is stably connected at multiple points. The application significantly improves the thermal oxidation resistance, ultraviolet aging resistance and thermal deformation performance of the material, and the prepared cable protection pipe has excellent mechanical strength, heat resistance and long-term weather resistance.

The invention discloses a biomass-based thermal insulation coating as well as a preparation method and application thereof, and belongs to the technical field of thermal insulation materials. The heat-insulating coating is composed of a biomass-based supramolecular adhesive and a heat-insulating filler; the adhesive is formed by synergistic crosslinking of lipoic acid and tannic acid through dynamic covalent bonds and multiple hydrogen bonds, and the adhesive strength higher than 1.0 MPa can be provided; the heat insulation filler is a hollow glass bead system with optimized particle size and true density. The core of the invention lies in that a tough and dynamic supramolecular network formed by the biomass-based adhesive not only endows the coating with excellent interface bonding force and mechanical stability, but also can cooperatively construct a more efficient thermal barrier structure through tight compounding with a multi-scale thermal insulation filler, so that the heat conductivity coefficient of the coating can be as low as 0.03 W / (m.K). The coating has the comprehensive advantages of being environmentally friendly and efficient in heat insulation, and is suitable for the field with double strict requirements for reliability and heat insulation.

The invention discloses a gel microneedle loaded with silver nanoparticles and a preparation method and application thereof.The extract nano-silver (AB-AgNPs) is prepared through a green synthesis strategy, a drug-loaded microneedle system is constructed based on carboxymethyl chitosan-vanillic aldehyde-polyvinyl alcohol (CMCS-Va-PVA) composite gel, the AB-AgNPs prepared through the technology are uniform in particle size and stable in dispersion, and the drug-loaded microneedle has the advantages that the drug-loaded microneedle is good in drug-loaded performance and good in drug-loaded performance; the crystal has a typical face-centered cubic crystal structure and metal state Ag0 characteristics; the gel microneedle has good mechanical strength and forming effect, the AB-AgNPs and the gel matrix are stably combined through hydrogen bonds, the chemical properties are kept unchanged, and the system has broad-spectrum efficient bacteriostatic activity and biocompatibility; an in-vitro experiment proves that the green synthesized gel microneedle loaded with the silver nanoparticles has a remarkable capability of promoting the healing of L929 cell tissues; a rat wound experiment proves that the gel microneedle can regulate and control an inflammatory factor network and promote cell migration and tissue regeneration, healing of common and infected wounds is remarkably accelerated, and the wound residue ratio in 9 days is as low as 2.7% and 10.9% respectively.

The invention belongs to the technical field of photoelectric materials and devices, and particularly relates to a perovskite thin film and a preparation method and application thereof. A fluorine-containing phosphazene compound is used as a ligand and is mixed with a perovskite precursor solution composed of lead iodide, formamidine iodine and cesium iodide, spin coating is performed, the fluorine-containing phosphazene compound and part of formamidine cations form hydrogen bonds, part of formamidine cations are anchored at the bottom of a perovskite film, Cs-formamidine cations are uniformly distributed, and the perovskite film is prepared. Meanwhile, the fluorine-containing phosphazene compound and Pb < 2 + > form a coordinate bond, Pb < 2 + > defects are passivated, and the perovskite thin film is obtained through anti-solvent treatment and annealing treatment. The fluorine-containing phosphazene compound interacts with the components in the perovskite precursor solution, so that the nucleation rate of perovskite can be increased, the crystallization rate can be slowed down, the tensile stress can be eliminated, the perovskite does not enter crystal lattices, and the stability and crystallinity of the film are guaranteed. The perovskite thin film can be used for an inverted perovskite solar cell, and the performance and the stability of a device are improved.

The invention provides nano cellulose as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out heating reaction on a mixed solution containing a biomass material and a eutectic solvent, and filtering to obtain fibers; (2) mixing the fiber with a solvent, and performing ultrasonic treatment to form the nano cellulose; wherein the eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is selected from 2-aldehyde acetic acid and / or chloroacetic acid, and the hydrogen bond acceptor is selected from choline chloride. The preparation method provided by the invention can effectively reduce the cost and energy consumption for synthesizing the nano cellulose.

The invention relates to the technical field of high polymer materials, and discloses a flame-retardant PP composite material and a preparation method, the flame-retardant PP composite material comprises the following raw materials by weight: 100 parts of PP, 10 parts of ABS, 1-3 parts of polypropylene grafted maleic anhydride, 2-5 parts of an intermediate product B, and 1-5 parts of modified graphene oxide, according to the prepared intermediate product B, raw materials are simple and easy to obtain, the preparation method is simple, a hydroxyl structure contained in the intermediate product B and the PP composite material are utilized to generate hydrogen bonds and chemical bonds, the precipitation-resistant effect of the intermediate product B in the PP composite material is enhanced, graphene oxide is subjected to organic modification, and the precipitation-resistant performance of the PP composite material is improved. The compatibility of the graphene oxide in the composite material is enhanced, and the mechanical property and the flame retardant property of the composite material are improved.

The invention relates to the technical field of nanofluid enhanced heat transfer simulation, in particular to a molecular dynamics-based mixed nanofluid heat transfer characteristic analysis method, which comprises the following steps of: constructing a molecular model comprising copper, graphene nanoparticles and an ionic liquid / water mixed base solution, and calculating the heat transfer characteristic of the mixed nanofluid through a distribution potential function and a periodic boundary condition; and performing energy minimization and molecular dynamic relaxation to achieve thermodynamic equilibrium. A steady-state temperature gradient is established based on the unbalanced molecular dynamics principle, and the thermal conductivity is calculated according to the Fourier law. Microcosmic parameters such as a radial distribution function, mean square displacement and the number of hydrogen bonds are synchronously analyzed, and a coupling mechanism of interaction and heat transfer performance of the nano-particle-base fluid interface is disclosed. According to the method, the heat transfer characteristic of the mixed nanofluid can be clarified on the molecular scale, and an efficient and reliable analysis means is provided for nanofluid screening and design in application of a solar heat collector, a heat management system and the like.

The invention relates to the technical field of high polymer materials, and discloses a furyl polyurethane adhesive and a synthesis method thereof, polymer polyol is used as a soft segment, isocyanate and two specific furyl chain extenders are used as hard segments, polymerization is performed through a one-step method, and the method has the advantages of simple process, short flow, mild reaction conditions and the like. Wherein a furan ring and an amide group of the two specific furyl chain extenders endow the material with rigidity and excellent bonding performance, and form a high-density hydrogen bond network with a hydrazide group, so that the mechanical strength, the toughness and the bonding performance of the material are remarkably improved. By regulating and controlling the proportion of the components, the rigidity and flexibility of the material can be effectively balanced, so that the polyurethane adhesive with excellent comprehensive performance is prepared. The furyl polyurethane adhesive prepared by the invention has relatively high adhesion strength and mechanical strength, and can be applied to the fields of buildings, automobile manufacturing, medical treatment, packaging, aerospace, electronics and the like.

The invention discloses a citric acid coordination regulated amino-functionalized palladium-silver alloy catalyst as well as a preparation method and application thereof. Nitrogen-doped carbon is used as a carrier, and the palladium-silver alloy catalyst is constructed through coordination-confinement in-situ reduction of citric acid. According to the preparation method, citric acid is introduced, and synergistic interaction of sub-nano-scale dispersion and efficient interface mass transfer is achieved through dual synergistic regulation and control of the size and the interface; the coordination effect enables the palladium-silver alloy to achieve sub-nano-scale superfine dispersion; as a competitive hydrogen bond acceptor / donor, the polycarboxyl group can effectively break an interface hydrogen bond network and inhibit the formation of a tight gas film from the source. The mechanism ensures that the catalyst is always in full contact with a mixed aqueous solution containing formic acid and formate and hydrogen is quickly released during formic acid dehydrogenation hydrogen production reaction, so that the catalyst has excellent anti-poisoning cycling stability while keeping high intrinsic activity, and the technical problem that high activity and long-term stability are difficult to consider at the same time is solved.

The invention discloses preparation of a CS / BC / MBene composite aerogel material and application of the CS / BC / MBene composite aerogel material in photo-thermal water evaporation. A MoAlB precursor is etched through a fluoride-free hydrothermal method to prepare MoBTxMBene nanosheets, then the MoBTxMBene nanosheets, chitosan (CS) and bacterial cellulose (BC) are assembled through interaction of hydrogen bonds and the like, and the CS / BC / MBene composite aerogel with vertical pore channels is obtained through directional freeze drying. The aerogel has excellent photothermal conversion performance, mechanical strength and hydrophilicity, the maximum surface temperature of the composite aerogel under irradiation of one sunlight reaches 112.3 DEG C, the water evaporation rate of 5.06 kg.m <-2 >. H <-1 > and the photothermal conversion efficiency of 99.76% can be achieved, the composite aerogel is suitable for seawater desalination and sewage purification, the preparation method is environmentally friendly and simple, and the preparation method is suitable for industrial production. And the method has a wide industrial application prospect.

The invention aims to provide a preparation method and application of a CMC / PVA active packaging film coated with chitosan-tannic acid on the surface, and belongs to the field of food preservation. Comprising the following steps: firstly, preparing a CP40 film, and then preparing a CP40 / CT% composite film: preparing a chitosan solution with the mass concentration of 1%, adding tannic acid TA into the chitosan solution, stirring for 30 minutes in a shading manner at room temperature to form a CT coating solution, flatly laying the prepared CP40 film on a planar carrier, coating the surface of a substrate film with the CT coating solution, and putting the composite film and the carrier into a drying oven at 45 DEG C for constant-temperature drying, so as to obtain the CP40 / CT% composite film. And after the solvent of the coating layer is completely volatilized, taking out and stripping to obtain the CP40 / CT% composite film. Under the action of hydrogen bonds and electrostatic attraction, a compact network structure of an amorphous-weak crystal region is formed in the composite film, so that the interface bonding strength of the film is enhanced, and the rigidity and flexibility of the film are balanced. The physical and chemical properties and biological activity of the composite membrane are synergistically optimized, and the composite membrane has obvious degradation signs after being buried in soil for 35 days and belongs to a biodegradable material.

The invention relates to the technical field of laundry detergents, and particularly discloses a concentrated laundry detergent capable of stably dispersing microcapsule essence and a preparation method of the concentrated laundry detergent. An organic polyurethane compound with a specific carbamate structure (the general formula is RNHCOOR ') is adopted as a suspending agent, the compound constructs a three-dimensional network structure through intermolecular hydrogen-bond interaction, the hydrogen bond donor / acceptor density of a carbamate unit is higher than that of existing suspension systems such as polyamide and hydrogenated castor oil, and the system is endowed with remarkable thixotropic characteristics. Under the action of shearing force, the network is dissociated, and the viscosity is reduced; and after the shearing force is removed, the hydrogen bond is quickly reconstructed, the viscosity rises again, rheological yield stress is generated, and stable anchoring of the high-load suspended matter is achieved. Meanwhile, due to the characteristic of high melting point of the organic polyurethane compound, the high-temperature processing condition can be tolerated, and the phenomenon of hot roughing is avoided. In addition, the hydrolysis resistance of the carbamate bond ensures the long-term stability of the suspension system in an environment with pH of 6-10 and in the presence of lipase.

This invention discloses a denitrification agent for low-temperature denitrification and its preparation method, belonging to the field of denitrification technology. The denitrification agent is prepared using diatomaceous earth as the matrix framework, compounded with calcium chloride, calcium bicarbonate, chitosan, sodium lignosulfonate, and TRIS (tris(hydroxymethyl)aminomethane). The components synergistically optimize the pore structure. Chitosan and sodium lignosulfonate achieve self-assembly through hydrogen bonding and electrostatic attraction. Nitrogen oxides are removed through a dual action of alkaline absorption and electrostatic adsorption. The TRIS can be regenerated and reused after alkali washing. This invention's denitrification agent solves the problems of high reaction temperature, poor low-temperature activity, low efficiency in removing low-concentration nitrogen oxides, and easy ammonia escape in traditional SCR denitrification technology, and can meet the requirements for NO removal in flue gas from power plants. x ≤15mg / m 3 It has ultra-low emission indicators, and features excellent low-temperature activity, high denitrification efficiency, and recyclability. It is suitable for denitrification treatment of low-temperature flue gas in power plants, etc.

The invention provides an addition type organic silicon pressure-sensitive adhesive composition and an addition type organic silicon pressure-sensitive adhesive product. The composition comprises methyl vinyl polysiloxane; a methyl MQ silicone resin; a hydrogen-containing silicone oil crosslinking agent; a release force enhancer; an inhibitor; a solvent; the stripping force reinforcing agent is a double-bond compound containing hydroxyl or alkoxy silane. According to the invention, a double-bond compound containing hydroxyl or alkoxy silane is used as a stripping force reinforcing agent of the addition type organic silicon pressure-sensitive adhesive, and active groups such as hydroxyl and alkoxy silane can be bonded with an adhered object through hydrogen-bond interaction or hydrolytic condensation, so that the stripping strength of the pressure-sensitive adhesive on the adhered object is enhanced; wherein the double bonds can enable the stripping force enhancer to be combined in the pressure-sensitive adhesive through covalent bonds, so that the precipitation of small molecules is greatly reduced, and the stability of the stripping force can be effectively improved. Experimental results show that the stripping force of the pressure-sensitive adhesive on a steel plate can reach 2192 g / inch, and the stripping force is still kept at 2146 g / inch after the pressure-sensitive adhesive is aged for 14 days.

The application provides a kind of eutectic solvent and its preparation method and application, the eutectic solvent includes hydrogen bond donor compound and hydrogen bond acceptor compound, the structural formula of hydrogen bond donor compound is wherein, R1 and R2 independently selected from n-octyl or iso-octyl, the hydrogen bond acceptor compound includes tri-n-octyl phosphine oxide.The eutectic solvent can be efficiently extracted from the permanent magnet rare earth waste hydrochloric acid solution of transition metal, can reduce the use of a large amount of organic solvent in the traditional extraction process.

The application discloses a wear-resistant coating and application thereof to a leather surface, and belongs to the technical field of leather finishing. The coating comprises a functional polyurethane-acrylate composite emulsion, a photoinitiator, an additive and deionized water. The composite emulsion is prepared through pre-polymerization, fluorine-containing grafting and in-situ sol-gel reaction of hyperbranched polyester polyol, dynamic bond chain extender and the like. The hyperbranched skeleton provides mechanical support, the double dynamic bonds endow the coating with self-repairing function, in-situ nano-composite enhances wear resistance, the double urea hydrogen bonds strengthen the bonding force, and the fluorine-containing side chains endow the coating with hydrophobic and stain-resistant properties. The coating is prepared by matching a gradient curing process. The coating prepared by the application has high wear resistance, efficient self-repairing property, firm adhesion, excellent stain resistance and leather-adaptive flexibility, and meets the actual needs of medium and high-end leather finishing.

The application belongs to the technical field of gas separation and carbon dioxide capture absorbent, and discloses a guanidinium-based deep eutectic solvent absorbent suitable for a wet environment, a preparation method thereof and CO2 capture application. The deep eutectic solvent takes 1-acetyl guanidine AG as a hydrogen bond acceptor and an alcohol amine compound as a hydrogen bond donor, and is formed into a uniform and stable liquid through heating and stirring. When the molar ratio of AG to MEA is 1:5.5 under the condition of 333.15 K and 1.0 bar, the system has a high CO2 absorption capacity, reaching 0.2278 g / g. When the water content is 10 wt%, the CO2 absorption capacity can be increased to 0.2456 g / g. The absorption rate is fast, and the absorption equilibrium can be approached in 20 min. The DESs have the characteristics of high CO2 absorption capacity, fast absorption rate, simple preparation method and good adaptability to a wet environment.

The present invention provides a visual indicator film for the freshness of fresh-cut fruits, a preparation method, the use and a detection method. The preparation method comprises the following steps: preparing a Co-based MOF; washing and activating the Co-MOF; preparing a CMC-Na-based thin film; and preparing a CMC-Na-based thin film, and thereby obtaining an indicator film for phenol red (PR) or an indicator film for bromothymol blue (BTB). In the present invention, an irregular spherical Co-based metal organic framework (Co-MOF) loaded with PR or BTB is prepared, and the nanocomposites Co-MOF / PR and Co-MOF / BTB are obtained after dyes and the MOF are adsorbed by means of the hydrogen bond interaction. Then, the nanocomposites are embedded into a sodium carboxymethyl cellulose (CMC-Na) base material to prepare CO2-responsive packaging materials, namely, a CMC-Na / PR / Co-MOF and a CMC-Na / BTB / Co-MOF, which are used for monitoring the freshness of fruits in real time and in situ. The Co-MOF-based composite thin film has good water resistance, time-temperature stability and mechanical properties, and also exhibits enhanced ultraviolet-visible light barrier properties, dye migration resistance and thermal stability. The visual indicator film for the freshness of fresh-cut fruits can effectively reflect the concentration of CO2, and is suitable for real-time and in-situ monitoring of the freshness of fruits.

The invention belongs to the technical field of membrane separation, and discloses a composite membrane formed by compounding a loose nanofiltration layer on an ultrafiltration layer and a preparation method and application of the composite membrane. Polyphenol covalent bonds and non-covalent bonds (hydrogen bonds, pi-pi accumulation) are adsorbed on an ultrafiltration membrane matrix to form functional active sites, and then a low-activity aldehyde group substance and polyphenol are subjected to a Schiff base reaction to form a covalent anchoring network; then a flexible long-chain amido substance is introduced to slowly permeate into the network to carry out Michael addition reaction or Schiff base reaction, supplementary crosslinking is carried out with residual functional groups, and finally, the flexible long-chain amido substance reacts with a low-concentration aldehyde solution for a short time to carry out secondary surface crosslinking to form a stable and loose nanofiltration layer network structure. Through step-by-step and interface regulation and control design, the process is simple, the condition is mild, stable and repeated preparation can be realized, and an innovative high-performance technical solution is provided for the practical application of the membrane material for deep treatment and resource recycling of dye wastewater.

Provided is a method capable of selectively leaching Ni from an oxidized ore containing Ni and Si. The method of leaching nickel from an oxidized ore according to the present disclosure includes the steps of: preparing a liquid leaching agent containing a hydrogen bond acceptor that has made contact with hydrochloric acid, and a hydrophobic organic compound (provided that unsubstituted alicyclic hydrocarbon compounds and unsubstituted aromatic hydrocarbon compounds are excluded); and contacting an oxidized ore containing nickel and silicon with the leaching agent.

The invention provides a COF material, a perovskite battery, a preparation method of the perovskite battery and an electric device. X ions in the COF material are positive ions containing imidazole. The COF material for the perovskite solar cell, provided by the invention, has very strong adsorption capacity on I2; besides, the COF nanopore contains a plurality of N-containing and O-containing electron-rich groups and also contains pi electron conjugated structures such as a benzene ring and imidazole, and imidazole ions also serve as hydrogen bond donors, so that dynamic active sites in the COF nanopore are increased, and adsorption of I2 is further promoted through the synergistic effect of hydrogen bonds and electron-rich sites; therefore, the COF material can weaken the chemical reaction between the metal electrode and the perovskite, thereby inhibiting the corrosion of the metal electrode in the perovskite solar cell. The COF material also contains a plurality of passivation groups such as an oxygen-containing functional group and a nitrogen-containing functional group, and the passivation groups can passivate Pb < 2 + > defects in the perovskite layer.

This invention relates to the field of catalyst technology, specifically to a latent epoxy resin curing catalyst with precisely controllable activity and its preparation method. The catalyst is 1-(2-(N-tert-butyl-N'-phenylurea)ethyl)-3-(2-(phenyldithio)ethyl)imidazolium, which simultaneously possesses an imidazolium ring catalytic active center, a thermally hindered urea bond, a temperature-responsive dynamic disulfide bond, and an intramolecular hydrogen bond unit. Precise control of catalytic activity is achieved through the synergistic effect of these triple dynamic bonds. The catalyst exhibits excellent storage stability at room temperature, rapid curing at activation temperature, and is free of metal ions. The cured epoxy resin exhibits good dielectric properties. This invention's catalyst achieves a balance between excellent latency and rapid curing performance through the synergistic control of these triple dynamic bonds. It possesses excellent dielectric and mechanical properties, can be compounded with various curing agents, and its preparation method is simple and easy for industrial production.

The invention relates to the technical field of composite films, and particularly discloses a high-fastness colored high-brightness composite film packaging material manufacturing process which comprises the steps of S1, base film preparation and pretreatment, S2, surface activation treatment, S3, colored coating preparation, S4, coating, S5, gradient drying and curing and S6, curing. Through corona and twice plasma treatment of different gases, oxygen-containing, amino and fluorine-containing groups are synergistically introduced to the surface of a base membrane, the chemical bonding and hydrogen bonding effects of a coating and the base membrane are enhanced, a composite system of epoxy resin, hydroxy acrylic resin and polyurea resin is adopted, and modified carbon black with the aminated surface is matched, so that the coating has a good anti-corrosion effect on the surface of the base membrane. Under the action of a catalyst and a cross-linking agent, a compact chemical cross-linking and hydrogen bond physical cross-linking dual-network structure is formed; and gradient heating drying and low-temperature curing processes are combined, so that stable volatilization of the solvent and full and complete cross-linking reaction are ensured, and the adhesive force and wear resistance of the base film and the coating layer are effectively improved.