4676 results about "Chemical bond" patented technology

A hard carbon negative electrode material as well as a preparation method therefor and a use thereof. The hard carbon negative electrode material comprises a hard carbon base material, heteroatoms and metal monoatoms, wherein the metal monoatoms are doped into the hard carbon base material by means of the heteroatoms, the heteroatoms comprise at least one of N, P or S, and the metal monoatoms are metal monoatoms that can undergo an alloying reaction with sodium. The metal monoatoms are doped into the hard carbon base material by means of covalent (chemical bond) interactions with other heteroatoms, so that the doping of single atoms is achieved, thereby improving the overall capacity and rate capability of a sodium ion battery at normal temperature, and ensuring the capacity retention rate of the sodium ion battery under a low temperature condition.

The invention discloses a self-assembled monomolecular layer hole transport material, a hole transport layer and a battery thereof. According to the present invention, the compound having different anchoring groups and represented by the formula (I) can be subjected to firm self-assembly with the substrate surface through the chemical bonding manner, such that the good coverage rate is provided, the film forming quality is increased, and the transmission performance is improved; and meanwhile, the material has a rigid conjugate large-plane condensed ring core structure, so that the hole transmission performance of the material is ensured, and the photovoltaic performance is favorably improved. When the material is applied to a perovskite solar cell to prepare a hole transport layer, the hole extraction capability can be enhanced, and the open-circuit voltage, the filling factor and the photoelectric conversion efficiency of a device can be improved.

This invention discloses a fluorene-based organic small molecule hole transport material and its applications. The general structural formula of the fluorene-based organic small molecule hole transport material is as follows: where n = 1-4, and R represents the hole transport capacity. This fluorene-based organic small molecule hole transport material is used as an undoped hole transport material in perovskite solar cell devices. By introducing dicarboxylic acid groups onto the fluorene-based organic small molecule hole transport material, when used in an inverted perovskite solar cell device, it can form chemical bonds with the hydroxyl groups of the glass conductive substrate, forming a directionally aligned self-assembled layer on the surface of the glass conductive substrate. This effectively improves the charge transport capability at the interface and increases the photoelectric conversion efficiency of the perovskite solar cell device. Furthermore, since this perovskite solar cell device does not contain lithium salts, it exhibits high water and oxygen stability. In addition, the synthesis process of this fluorene-based organic small molecule hole transport material is simple, and the raw materials are inexpensive and readily available, making it highly valuable for practical applications.

The invention belongs to the technical field of ceramic glaze, and particularly discloses antibacterial ceramic glaze and a preparation method thereof.The ceramic glaze is prepared from, by mass, 60-75 parts of basic glaze, 1-3 parts of nanometer titania, 2-6 parts of cosolvent, 0.5-3 parts of ochre, 5-10 parts of curcumin, 1-3 parts of stabilizer, 1-5 parts of rare earth antibacterial agent and 1-3 parts of sodium polyacrylate, and 1-6 parts of a composite additive. According to the antibacterial ceramic glaze and the preparation method thereof, the antibacterial performance, glossiness and smoothness of a glaze surface are improved, the crystal structure of the glaze can be refined through introduction of rare earth ions, the hardness of the glaze surface is enhanced, the wear resistance of a ceramic product is effectively improved, and the service life of the ceramic product is prolonged. Stable chemical bonds are formed in the glaze due to the special chemical properties of the rare earth elements, the resistance of the glaze to chemical substances such as acid and alkali is enhanced, and the chemical corrosion resistance of the ceramic glaze is improved.

The invention relates to an insulating weather-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings, and the powder coating comprises composite modified resin, a dual curing agent, a functional filler, a polyacrylate leveling agent, fumed silica, a benzotriazole ultraviolet light absorber, polytetrafluoroethylene wax powder and the like. A core-shell structure of the composite modified resin is designed, high insulativity is kept through a silane modified epoxy core layer, a weather-proof barrier is provided through an acrylic acid shell layer, and the phase separation problem is solved through interface chemical bonding; a dual-curing mechanism is designed, and isocyanate and acrylic hydroxyl react to form an interpenetrating network while an epoxy core layer is cured by anhydride; a filler synergistic effect is designed, silane coupling agent modified nano boron nitride forms a three-dimensional heat-conducting insulating network, and rutile type titanium dioxide is coated with silicon dioxide, so that ultraviolet aging is resisted. All the components cooperate with one another, so that the coating has excellent insulativity, weather resistance, adhesiveness and the like at the same time.

The invention relates to the technical field of electronic devices, in particular to a monomolecular electric memristor based on dipole control and a preparation method thereof.The monomolecular electric memristor comprises a molecular heterojunction, and the molecular heterojunction is formed by connecting dipole molecules and graphene point electrodes through amido bonds; the dipole molecule comprises an amide structure based on a carbazole nitrogen-containing heterocyclic ring unit, under the action of an external electric field, a side chain chemical bond of the dipole molecule can rapidly rotate, the size and direction of an intramolecular dipole moment can be changed, the molecule can be rapidly and stably switched among different resistance states, and the read-write speed of the memristor is remarkably improved; the storage state is stably kept under the power-off condition, and the long-term stability and reliability of the memristor function are ensured. The preparation method comprises the processes of introducing dipole molecules and forming amido bonds between the dipole molecules and the graphene point electrode, and the preparation method is simple and convenient to operate, mild in condition and beneficial to large-scale production.

The invention relates to the technical field of building materials, and particularly discloses a high-performance solid-waste-based grouting material and a preparation method thereof. Comprising the following raw materials in parts by weight: 32 to 54 parts of Portland cement, 12 to 16 parts of a modified admixture, 2.4 to 3.6 parts of a functional filler, 42 to 56 parts of aggregate, 45 to 55 parts of a photoinitiator solution, 0.6 to 0.8 part of a water reducing agent, 0.9 to 1.1 parts of a composite expanding agent, 0.04 to 0.06 part of a defoaming agent and 9.2 to 12.4 parts of deionized water. Siloxane groups, acylamino groups, ester groups and benzene rings are chemically bonded on the surface of the modified admixture, so that the hydrophilicity of the modified admixture is reduced, the modified admixture can form hydrogen-bond interaction with hydroxyl groups and cement hydrates on the functional filler, and meanwhile, a flexible long-chain alkane structure on the functional filler can be entangled with the modified admixture, so that the flexibility of the modified admixture is improved. The mechanical property, the durability and the fluidity of the grouting material are improved.

The invention relates to the technical field of solid-state batteries, in particular to a solid-state electrolyte composite membrane, a preparation method thereof and a solid-state battery. The preparation method comprises the following steps: performing ultrasonic-initiated cross-linking polymerization on a polymer solid electrolyte monomer, a cross-linking agent and a surface hydroxylated oxide solid electrolyte to obtain a polymer-oxide solid electrolyte matrix, washing the polymer-oxide solid electrolyte matrix, and soaking the polymer-oxide solid electrolyte matrix in an electrolyte to obtain the solid electrolyte composite membrane. According to the invention, crosslinking of the polymer electrolyte monomer is initiated by ultrasound, and chemical bonds are formed between part of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte, so that the interfacial compatibility of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte is effectively improved, and the ionic conductivity, chemical stability and mechanical strength of the polymer electrolyte are improved; due to the properties of easy processing, good flexibility and the like of the polymer electrolyte, the interface compatibility between the oxide solid electrolyte and the positive and negative pole pieces can be fully improved, the flexibility and the processability are improved, and a win-win effect is achieved.

The invention relates to the technical field of sodium ion battery research and development, and particularly discloses a strong-oxidizing acidified asphalt-based hard carbon negative electrode material and a preparation method and application thereof, concentrated nitric acid or concentrated sulfuric acid is introduced into asphalt as a cross-linking agent, so that the cross-linking reaction among molecules can be promoted under a low-temperature condition, and the structural stability of the material is greatly improved. Compared with a traditional method, the method has the advantages that the technological process is simplified, only one-step pretreatment is needed before carbonization, and energy consumption and pollution caused by high temperature can be avoided. According to the liquid phase cross-linking strategy, through reconstruction of chemical bonds, the low-softening-point asphalt can form a more compact carbon precursor network structure at low temperature, and formation of a high-performance hard carbon material in the subsequent carbonization process is facilitated.

The invention discloses a gradient composite coated modified lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of positive electrode materials. An LMFP precursor is pretreated through a citric acid-ethanol mixed solution, an active crystal face is exposed, and then a three-dimensional gradient coating structure of a polydopamine (PDA) chemical bonding layer, an MXene nanosheet middle layer and a polyaniline (PANI) conductive outer layer is sequentially constructed on the surface of the material, so that the electronic conductivity of the lithium manganese iron phosphate positive electrode material is increased to 10 <-3 > S / cm magnitude, and the performance of the lithium manganese iron phosphate positive electrode material is improved. The capacity retention ratio (1C) of 500 cycles is larger than 90%, the coating layer is not prone to falling off, and meanwhile dissolution of manganese ions is effectively inhibited.

The embodiment of the invention provides a preparation method of a negative electrode active material, the negative electrode active material, a battery and equipment. Fluorine-containing gas is used as discharge gas, and discharge current is introduced into a plasma treatment device in the process of performing vibration dispersion treatment on a porous carbon substrate through the plasma treatment device; the fluorine-containing gas is used for carrying out plasma discharge treatment on the porous carbon matrix, so that the fluorine element provided by the fluorine-containing gas can react with carbon atoms on the surface of the porous carbon matrix to form chemical bonding, and the chemical bonding uniformity between the fluorine element and the carbon atoms on the surface of the porous carbon matrix can be improved; and the preparation cost of the negative electrode active material can be reduced, and the preparation efficiency of the negative electrode active material is improved, so that the battery capacity and the cycle performance of a secondary battery prepared from the negative electrode active material disclosed by the embodiment of the invention can be improved.

A graphene composite nanoparticle abrasive flexible fluid electric field-ultrasonic auxiliary polishing method comprises the following steps that S1, primary chemical bonding and graft copolymerization of graphene and nanoparticles are achieved through a dynamic high shear field-ultrasonic synergistic induction method; and then compounding the primary abrasive material and the secondary graphene into the graphene composite nano-particle abrasive material of a multi-layer structured coating system with a core-shell structure through a dynamic high shear field-ultrasonic synergistic induction method. S2, arranging and moving of the particles on the surface are adjusted by applying an electric field; s3, ultrasonic waves are applied in the polishing process, contact between particles and the surface is improved, and surface defects are removed; and S4, the micro state of the abrasive particles and the surface state of the workpiece in the polishing process are tracked. The invention further provides a device for implementing the method. The polishing precision, the surface smoothness, the polishing speed and the polishing uniformity are improved, and the energy consumption is reduced; the polishing consistency and stability are improved, the machining cost is reduced, and the rejection rate is reduced.

The invention relates to an antistatic MLCC release film base film and a preparation method thereof. The antistatic MLCC release film base film is prepared by melt blending and biaxial stretching of PET master batch, an antistatic composition and a nano filler, wherein the antistatic composition is prepared by compounding modified PET-PEG and thiophene modified aromatic polyamide; the nano filler is prepared by carrying out melt extrusion on KH550 modified talcum powder and MAH-g-PET (maleic anhydride-grafted polyethylene terephthalate). The antistatic composition disclosed by the invention has the beneficial effects that the antistatic composition is formed by interweaving two polymers, and a stable three-dimensional conductive network is constructed in the PET film, so that the antistatic performance is more efficient, lasting and stable. In addition, through chemically bonded modified talcum powder, the smoothness and low roughness are provided, and meanwhile reinforcing and toughening are achieved; and the single-layer extrusion process can realize ultrathin thin film, the production process is simplified, and the production cost is greatly reduced.

The invention relates to the technical field of drug interaction prediction, and discloses a drug interaction prediction method based on multilayer attention and elastic message passing, which comprises the following steps: firstly, extracting graph structure information of drug molecules from a 3D structure of the drug molecules, including associated features of atoms and chemical bonds; on the atomic feature level, learning updating and denoising of different atom and chemical bond features in drug molecules are achieved by using an elastic graph neural network and fusing the attention mechanism of Transform and combining a 3D position coding method based on the molecular mass center; on the molecular feature level, the attention mechanism is further utilized, and through supervised learning, comparative learning and structured learning, the potential interaction relationship of different drug molecules is mined, and potential network attacks are detected and defended; and interaction prediction of any two drug molecules i and j is realized. The results of four indexes of ACC, AUC, AP and F1 all reach 98% or above, and the method exceeds the most advanced method at present.

The invention provides a fresh food quality degradation pre-judgment method and system based on multi-modal dynamic coupling, and aims to solve the problem of prediction lag caused by data isolation and dynamic coupling deficiency in the traditional storage and transportation process. Specifically, sensory layer data, environment layer data and operation layer data are synchronously collected through a multi-source sensor, chromatic aberration quantification, chemical bond feature extraction and spatial chemical fusion processing are carried out on the sensory data, and a quality degradation feature tensor is generated; based on a graph network model and frequency domain analysis, constructing a dynamic coupling parameter set of quality degradation characteristics and environmental parameters; fusing the loading and unloading pulse trajectory tensor, the cold chain stability distribution and the coupling parameter set, and generating a degradation constraint distribution matrix through multivariable weight mapping; and finally, combining acoustic resonance mode coherence analysis and constraint matrix evolution, and outputting a four-stage quality label. According to the method, through multi-dimensional real-time sensing, dynamic coupling modeling and hierarchical management and control, the fresh food storage and transportation loss is remarkably reduced, and the cold chain management efficiency is improved.

The invention discloses a modified resin coated double-doped microcrystalline graphite negative electrode material as well as a preparation method and application thereof. The modified resin coated double-doped microcrystalline graphite negative electrode material has a core-shell structure, wherein an inner core is a three-dimensional network porous structure formed by metal salt and sulfur double-doped microcrystalline graphite; metal salt in the inner core forms a chemical bond between sulfur and microcrystalline graphite to provide a bridge for bonding of microcrystalline graphite and sodium; the shell is a coating layer formed by coating the surface of the inner core with modified resin and carbonizing the modified resin, and has a three-dimensional porous conductive network structure. According to the invention, through the activation process, increase of interlamellar spacing and active sites of microcrystalline graphite, and double doping of sulfur element and metal salt, the doping amount of sulfur and metal salt in microcrystalline graphite is improved, meanwhile, the metal salt forms chemical bonds between sulfur and microcrystalline graphite, sodium ion loss in the charge and discharge process is reduced, and the material stability is improved; and the rate cycle performance of the sodium ion battery is improved.

The invention relates to the technical field of fabrics, and discloses a preparation method of a high-elastic anti-wrinkle blended fabric, which comprises the following steps: adding sodium carbonate, an organosilicon quaternary ammonium salt triazine finishing agent and a cotton / spandex blended fabric into water, soaking, then soaking and rolling twice, washing, and then pre-drying and baking to obtain the high-elastic anti-wrinkle blended fabric. The finishing agent contains cyanuric chloride groups, active chlorine atoms of the cyanuric chloride groups can react with hydroxyl groups of the cotton fabric, so that the finishing agent is connected to the surface of the blended fabric through stable chemical bonds, meanwhile, the finishing agent contains a large number of amido bonds, and the amido bonds and carbamate groups of spandex fabric form hydrogen bond interaction, so that the finishing agent can be used for finishing the cotton fabric. The finishing agent can be firmly attached to the surface of the blended fabric and has good washing resistance, the finishing agent is not prone to falling off after multiple times of washing, and the fabric still has high wrinkle recovery angle, moisture regain and good hand feeling and keeps good wrinkle resistance, hydrophilic performance and soft and elastic hand feeling.

The invention provides a solid electrolyte and a preparation method and application thereof, the solid electrolyte comprises a solid electrolyte matrix and a coating layer existing on the surface of the solid electrolyte matrix, and the coating layer comprises an inorganic substance with a sublimation temperature less than 500 DEG C; the coating rate of the solid electrolyte is greater than or equal to 90%. According to the solid electrolyte provided by the invention, the coating layer is introduced to the surface of the solid electrolyte matrix, the inorganic matter with the sublimation temperature less than 500 DEG C is used as the coating material, and the coating rate is greater than or equal to 90%, so that the interface impedance between the solid electrolyte and the electrode material can be reduced, and the microdefects and pores on the surface of the solid electrolyte matrix can be filled up; meanwhile, the solid electrolyte matrix can be prevented from being directly exposed in the environment, chemical bonds can be formed between the solid electrolyte matrix and some metal elements in the solid electrolyte matrix, and therefore the ionic conductivity retention rate and stability of the solid electrolyte can be improved, and the specific capacity and the first coulombic efficiency of a battery can be improved when the solid electrolyte is applied to the battery.

The invention relates to the field of metal surface treatment, and discloses an efficient electroplating process for a cotton picker spindle and an electroplating liquid formula, the efficient electroplating process comprises the following steps: step 1, substrate pretreatment: sequentially carrying out alkali washing, acid washing and plasma activation on the spindle; step 2, preparing an electroplating solution: dissolving nickel sulfate, sodium hypophosphite, a composite nano additive and a complexing agent in water, and adjusting the pH value to 4.8-5.3; step 3, gradient pulse electroplating: carrying out pulse electroplating in three stages, including bottom layer deposition, transition layer deposition and composite layer deposition; 4, post-treatment is conducted, specifically, silane sealing and curing are conducted on the plating layer; the base body pretreatment in the first step comprises the following sub-steps of alkali washing and oil removal, wherein the picking ingot is soaked in a NaOH solution with the concentration being 45-55 g / L. According to the method, high-density hydroxyl active sites are constructed on the surface of the metal base material through a plasma activation process, strong chemical bonding is formed between a plating layer and the base material, and the interface bonding strength is remarkably improved.

The invention provides a composite reagent system and a chalcopyrite and sphalerite collecting method, and belongs to the technical field of mineral processing. The composite reagent system comprises a histidine derived functional group collecting agent and a black agent, and the histidine derived functional group collecting agent (containing a total sulfur ester group, a sulfydryl functional group and a side chain imidazole ring) serves as a core and is compounded with the black agent according to a specific proportion to form a target combination-synergistic interaction flotation mechanism. The histidine derivative collecting agent derives high-activity functional groups under the alkaline condition, and after sulfydryl is dissociated, stable chemical bonds are formed by the dissociated sulfydryl and metal ions on the surfaces of the chalcopyrite and the zinc sulfide. The black powder serves as an auxiliary collecting agent, and the collecting capacity of fine-grain or low-activity sulfide minerals is enhanced through chemical adsorption of dithiophosphate radicals and metal ions on the surfaces of the chalcopyrite and the sphalerite. After the two components are compounded, the selective enrichment efficiency of copper-zinc minerals in the flotation process is remarkably improved.

The invention provides a self-repairing EVA adhesive film and a preparation method thereof, and relates to the technical field of solar photovoltaic module packaging. According to the self-repairable EVA adhesive film disclosed by the invention, through Diels-Alder reactive group grafting and silane coupling agent microencapsulation technologies, a dual self-repairing mechanism of a photovoltaic module packaging adhesive film is realized, and the dual self-repairing mechanism comprises physical rearrangement repairing and chemical bonding repairing; while high light transmittance (more than or equal to 90%) and bonding strength (more than or equal to 96 N / cm) are maintained, the aging resistance (delta YI is less than or equal to 3) of the EVA adhesive film is remarkably improved, the service life of the EVA adhesive film is remarkably prolonged, and the problems that a traditional EVA adhesive film is easy to age in an extreme environment and is easy to suffer from micro damage caused by mechanical stress are solved; the preparation process disclosed by the invention is compatible with the existing production line, and has a relatively high industrial application value.

The invention belongs to the technical field of gel materials, and particularly relates to a high-performance water-swelling acrylic acid-based material and a preparation method thereof. Comprising the following steps: (1) modifying graphene by adopting a silane coupling agent containing unsaturated double bonds to prepare a modified graphene dispersion liquid; (2) sequentially adding acrylic acid, an acrylamide monomer and a cross-linking agent into the modified graphene dispersion liquid, then adding an initiator, and reacting to obtain a gel mixed solution; and (3) freeze-drying the gel mixed solution to obtain the high-performance water-swelling acrylic acid-based material. The gel material is uniform in pore structure and high in mechanical strength. Physical adsorption can be carried out by taking Van der Waals force or electrostatic attraction force as adsorption driving force through a pore structure, and chemical adsorption can also be carried out by taking chemical bond force or hydrogen bond interaction as adsorption driving force through functional groups on the graphene and the acrylic polymer, so that organic pollutants such as cationic dyes and the like can be effectively and quickly removed.

The invention relates to a method for changing the surface performance of a collagen casing. The method comprises the following steps: treating cow split leather treated by a peeling machine by using an ammonium sulfate solution, and then treating the cow split leather by using a buffer solution; the preparation method comprises the following steps: uniformly mixing cleaned cow split leather with ice water, dicing and grinding to obtain collagen leather pulp; mixing the mucilage and a hydrochloric acid solution, adding cellulose into the hydrochloric acid solution to obtain a crude collagen colloid, and standing until the colloid is fully swelled; and homogenizing by using a homogenizer, extruding by using an extruder, and drying to obtain the tubular collagen casing. The preparation method has the advantages that the collagen casing is prepared by a wet method, a specific amount of cellulose is added during preparation to enter a network structure originally independently formed by collagen, the network space is filled, the surface roughness of the casing is increased, and meanwhile, the cellulose is combined with collagen molecules through chemical bonds to increase the stability of the network structure, so that the collagen casing is prepared. The surface performance of the casing is changed, the surface roughness is increased, the friction force between the sausage and a package is small, and the sausage is easier to package.

The invention discloses a preparation method and application of a carbon dioxide gas capture functional molecule modified nanogold catalyst. The preparation method comprises the following steps: synthesizing a modified molecule with a carbon dioxide gas capturing function through a chemical reaction; adding the modified molecules into an organic solvent, and uniformly mixing to obtain a solution; then adding a nanogold colloidal solution into the solution, uniformly stirring, and carrying out oil bath heating reaction; and after the reaction is completed, cooling to room temperature, carrying out suction filtration on the reaction liquid, respectively washing with ethanol and deionized water, and carrying out vacuum drying on the product to obtain the carbon dioxide gas capture functional molecule modified nanogold catalyst. In the electrocatalytic carbon dioxide reduction reaction process of the obtained catalyst, modification molecules are connected with the nanogold catalyst through chemical bonds, active sites of the nanogold catalyst are exposed, and meanwhile, an interface environment beneficial to the carbon dioxide reduction reaction can be provided; therefore, high activity, high selectivity and high stability of the molecular modified nanogold catalyst are realized.

The invention discloses a heat-insulating and high-temperature-resistant metal core fireproof plate and a preparation method thereof, belongs to the technical field of plate processing, and is used for solving the technical problem that the structural stability and fireproof performance of a fireproof plate in the prior art need to be further improved. The fireproof board comprises the two composite framework layers and the metal plate core layer arranged between the composite framework layers, in the process of preparing the fireproof board, aerogel and honeycomb polyimide resin are closely crosslinked through chemical bonds, in the supercritical drying process, the aerogel invades into gaps of a felt board to be solidified and closely combined with the felt board, and the fireproof board is formed. The aerogel layer serves as a heat insulation and sound insulation layer and is connected with all the layers at the same time, the honeycomb layer enhances the pressure resistance of the fireproof plate, all the layers are matched with one another in structure, and the fireproof plate which is flame-retardant, heat-insulation, bending-resistant, high-temperature-resistant, impact-resistant and stable is obtained.

The invention discloses a coal seam chemical outburst elimination method based on molecular dynamics, which belongs to the field of coal mine safety, and comprises the following steps: sampling and analyzing to obtain the element proportion, group composition and chemical bond connection mode of a coal sample, constructing a real coal molecular skeleton, and reducing and optimizing the molecular structure of coal by molecular simulation; the method comprises the following steps: adding a surfactant, setting the real gas content, gas pressure and environment temperature of a coal seam, establishing a micro model after the surfactant is injected into the coal seam, simulating the occurrence state and reaction process of methane molecules in the coal seam under the action of the surfactant, and determining the methane content in the coal seam by combining the migration characteristics of the methane molecules and the energy change of the system. And the concentration of the injected surfactant is optimized, so that the engineering application of large-range industrial water injection outburst elimination of the coal seam is developed. According to the method, through molecular simulation, the complex occurrence characteristics of the coal seam are considered, the concentration of the injected surface active agent is optimized, and the hydraulic measure efficiency is improved.

The invention discloses a double-site doped titanium lithium ion sieve adsorbent as well as a preparation method and application thereof. The adsorbent is a lithium removal product of a double-site doped titanium lithium ion sieve adsorbent precursor, the chemical general formula of the double-site doped titanium lithium ion sieve adsorbent precursor is Li (2-x) MxTi (1-y) NyOz, M is at least one of Na < + >, K < + >, Zn < 2 + >, Co < 2 + >, Ni < 2 + >, Mg < 2 + > and Al < 3 + > and occupies Li site, N is at least one of Cr < 3 + >, Fe < 3 + >, Zr < 4 + >, Nb < 5 + >, Ta < 5 + >, V < 5 + >, Mo < 6 + > and W < 6 + > and occupies Ti site, x is larger than or equal to 0.001 and smaller than or equal to 0.5, and y is larger than or equal to 0.001 and smaller than or equal to 0.5. Metal cations are introduced to replace Li sites and Ti sites at the same time, Li site substitution enlarges interlayer spacing and improves Li < + > diffusion rate, Ti site substitution regulates local chemical bond and electron distribution, stabilizes lattice structure and enhances electron conduction, and through double-site doping, 'ion-electron 'double channels are constructed, so that a collaborative optimization effect is achieved. The double-site doped titanium lithium ion sieve adsorbent disclosed by the invention is applied to adsorption and extraction of lithium in a Bayer process sodium aluminate solution, and the adsorbent shows excellent adsorption performance.

The invention discloses a hot melt adhesive suitable for a water-based coating waterproof coiled material, the waterproof coiled material sequentially comprises a base material, a connecting layer and an anti-sticking coating, the connecting layer is formed by the hot melt adhesive, the anti-sticking coating is formed by a water-based resin emulsion, the hot melt adhesive comprises a plasticizer, tackifying resin, functional resin and a thermoplastic elastomer, and the anti-sticking coating is formed by the plasticizer, the tackifying resin, the functional resin and the thermoplastic elastomer. The functional resin contains one or more of abietic acid, pinolenic acid and pimaric acid, the content of carboxyl in the functional resin is 0.90 mmol / g-2. 80 mmol / g, and carboxyl in the hot melt adhesive is used for forming chemical bond combination with amino in the water-based resin emulsion. The hot melt adhesive disclosed by the invention has a low surface contact angle and high surface energy, the resin emulsion of the anti-sticking coating can be well wetted on the surface, and meanwhile, the resin emulsion and the coating have stable bonding force, so that a full-sticking structure is ensured to be formed after a water-based coating type waterproof roll is constructed and poured with concrete.

The invention discloses a high-toughness seawater low-temperature environment self-repairing epoxy coating as well as a preparation method and application thereof. The preparation method comprises the following steps: providing a modified epoxy adaptive network material; the modified epoxy adaptive network material is prepared from epoxy resin, polyol, diisocyanate and a monomer containing dynamic chemical bonds through a reaction. Providing a modified Ti < 3 > C < 2 > T < x > two-dimensional nanosheet; the modified Ti < 3 > C < 2 > T < x > two-dimensional nanosheet is obtained by modifying Ti < 3 > C < 2 > T < x >-MXene by using dopamine and a modifier containing a quadruple hydrogen bond motif; and mixing the modified epoxy adaptive network material with the modified Ti < 3 > C < 2 > T < x > two-dimensional nanosheets, and carrying out an interface ordered cross-linking reaction, so as to prepare the high-toughness seawater low-temperature environment self-repairing epoxy coating. The high-toughness seawater low-temperature environment self-repairing epoxy coating provided by the invention has multiple types of dynamic chemical bonds, has excellent properties of thermosetting resin and thermoplastic resin, and shows high toughness and self-repairing characteristics.

The invention relates to the technical field of composite materials, in particular to a nano-montmorillonite reinforced unsaturated polyester resin based composite material and a preparation method thereof. Comprising the following raw materials in parts by weight: 60-85 parts of orthophthalic unsaturated polyester resin, 3-15 parts of nano montmorillonite, 1-5 parts of a polyfunctional group intercalator, 1-4 parts of an initiator, 0.5-2 parts of dimethylaniline and 0.5-3 parts of gamma-aminopropyltriethoxysilane. The polyfunctional intercalator interacts with interlayer ions and surface groups of the nano-montmorillonite through multiple functional groups of the polyfunctional intercalator, and is effectively inserted into the interlayer of the nano-montmorillonite, so that the interlayer spacing is obviously increased, and favorable conditions are provided for subsequent insertion and compounding of resin; the functional groups not only can chemically react with active groups of unsaturated polyester resin to form stronger chemical bonding, but also can enhance the interface bonding force between two phases through physical entanglement, so that the overall performance of the composite material is remarkably improved.