358 results about "Material synthesis" patented technology

The invention discloses a reaction kettle device for synthesis of an iron phosphate material, and particularly relates to the technical field of synthesis of battery materials, and the device comprises a kettle body, a driving motor, a transmission disc and a turbo-type paddle. A sealing cover is arranged at the top of the kettle body, a driving motor is connected with a rotating shaft, an anchor blade is arranged below the rotating shaft, and the bottom realizes turbine blade lifting and sleeve guide limiting through transmission of a piston cavity and compressed gas; and a ratchet wheel on the outer wall of the rotating shaft is meshed with a pawl in the transmission disc in a one-way mode, and intermittent wall scraping is achieved. According to the device, dead angles are broken through synergistic stirring of the double blades, the mixing uniformity and the reaction rate are improved, materials adhering to the wall are efficiently removed through intermittent wall scraping, the stable reaction environment is guaranteed through multiple sealing, the structure is flexible to adjust, maintenance is convenient and fast, efficient and high-quality synthesis of the iron phosphate material can be achieved, and the device is suitable for industrial large-scale production.

The invention aims to serve the national strategic emerging industry, and discloses a deterministic material synthesis method and a deterministic material synthesis system for pre-nucleation chiral intervention (PNChI for short), which are suitable for one-dimensional or quasi-one-dimensional material systems (such as carbon nanotubes, biomacromolecules and the like) with formalized chiral tags. According to the method, before irreversible closed nucleation of a precursor is completed, deterministic authorization of a target chiral index (n, m) is realized in a controllable time window through at least one engineering intervention mechanism (such as physical field regulation, catalytic interface design, information coding guidance and the like) based on distinguishable physical properties, and consistency is kept in subsequent growth. The system comprises a programmable intervention unit and an intelligent sequence control module, and does not depend on a separation or screening step after nucleation. The single chiral index abundance in the obtained material is greater than or equal to 95%, preferably greater than or equal to 98%. The statistical limitation of traditional chiral control is broken through, a general synthesis normal form from'instruction input 'to'structure output' is constructed, and the method is suitable for high-consistency application scenes such as semiconductors, quantum devices, catalysts and biological recognition.

The invention relates to the technical field of organic photoelectric materials, and particularly discloses a non-condensed ring small molecule acceptor material based on a quinonoid structure as well as a preparation method and application of the non-condensed ring small molecule acceptor material. According to the invention, easily available 1, 4-diacetyl piperazine-2, 5-diketone is used as a center, an alkyl chain and Ar are used for modification, EG is used as an end group, the non-condensed ring A-D-A '-D-A type structure acceptor material based on a quinone structure is constructed, and the general formula is shown in the specification. Wherein the PCE of the acceptor material which is modified by bithiophene and takes 2-(3-ethyl-4-oxothiazolidine-2-subunit) malononitrile as a terminal group reaches 15%. The non-condensed ring small molecule acceptor material based on the quinonoid structure is simple in synthesis process, and an effective strategy is provided for solving the problem of the overall performance of an organic solar cell.

The invention provides a cobalt tungstate and bismuth vanadate photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of material synthesis and photocatalytic application. In the presence of monoclinic-phase decahedron BiVO4, CoWO4 nanoparticles grow in situ on an electron-rich (010) crystal face of the CoWO4 nanoparticles through a hydrothermal reaction, and the cobalt tungstate and bismuth vanadate photocatalytic material is obtained. According to the cobalt tungstate and bismuth vanadate photocatalytic material, a simple hydrothermal method is adopted, in the synthesis process, a CoWO4 precursor is guided by electrostatic interaction, preferentially adsorbed and subjected to nucleation growth on the (010) crystal face of BiVO4, a compact chemical bonding interface is constructed through selective growth, the charge migration distance is effectively shortened, and the photocatalytic performance of the material is improved. The interface charge transfer resistance is reduced to the greatest extent, and the formed binary photocatalyst has excellent effects on photocatalytic hydrogen evolution and tetracycline degradation.

The present invention relates to the technical field of high polymer material synthesis, and discloses an anti-clogging microreactor for high viscosity silicone rubber synthesis, the anti-clogging microreactor comprises a microreactor chip, and the interior of the microreactor chip is provided with a tree-shaped bifurcated microchannel network based on fractal structure design; the invention relates to a continuous preparation method of an anti-clogging microreactor for synthesizing high-viscosity silicone rubber. The continuous preparation method comprises the following steps: S1, precisely metering a methyl cyclosiloxane monomer and a vinyl siloxane monomer, and then inputting the methyl cyclosiloxane monomer and the vinyl siloxane monomer into the microreactor; s2, carrying out a controllable ring-opening polymerization reaction in the microchannel; and S3, quickly terminating the reaction by injecting a terminating agent on line, and controlling the molecular weight and distribution of the polymer. Compared with the prior art, the method has the advantages that the problems that an existing microreactor is prone to blockage and difficult to operate stably for a long time when treating a high-viscosity siloxane polymerization system are solved, meanwhile, the method can achieve accurate control over product quality and continuity and intellectualization of the production process, the production efficiency is remarkably improved, and energy consumption is reduced.

This invention relates to the field of polymer material synthesis technology, specifically to a modified PVB resin and its preparation method. The invention introduces a fluorinated acetal monoaldehyde derivative containing fluorine into the PVB resin. This derivative is mixed with n-butyraldehyde and glyoxal, thereby undergoing an acetalization reaction with the 1,3-o-diol structure of the PVB molecular chain, incorporating the fluorinated side link into the PVB molecular chain. Utilizing the high electronegativity and high C-F bond energy of fluorine atoms, it shields against the intrusion of external corrosive media, inhibits oxidative yellowing, and improves weather resistance. Furthermore, the invention introduces glyoxal as a crosslinking agent, containing dialdehyde groups, which can react between adjacent polyvinyl alcohol segments, causing slight crosslinking between the originally linear PVB resin segments, improving the resin's shielding performance, further reducing the intrusion of external corrosive media, and enhancing the stability of the PVB resin.

The application discloses a kind of photocatalytic performance composite materials, the composite material is schulte mineral-titanium dioxide supported biochar, the surface of the biochar is loaded with schulte mineral and titanium dioxide, and the schulte mineral is also connected titanium dioxide.The composite material obtained by the application has excellent structural effect, the surface of the biochar with wrinkle structure is uniformly covered with schulte mineral and TiO2, wherein the schulte mineral is also combined with TiO2 closely.The composite material of the application can effectively enhance the electron transfer efficiency of photoelectronic and hole, increase the catalytic efficiency of catalyst.The composite material of the application has the advantages of short processing time and large capacity of processing.The precursor material for material synthesis is derived from waste biomass resources, FeSO4·7H2O is widely available and low in price, and TiO2 nanoparticles is low in price, so the catalyst in the application has the advantages of low cost, easy popularization and easy operation.

The invention belongs to the field of new energy material synthesis and electro-catalysis, and particularly relates to a chiral molecule coupling layered hydroxide catalyst and a preparation method and application thereof. The invention innovatively provides a synergistic strategy fusing chiral molecular engineering and a bionic design principle to improve the oxygen evolution performance of the nickel-iron layered hydroxide, a one-step hydrothermal method is adopted for preparation, controllable anchoring of chiral molecules between layers of the nickel-iron layered hydroxide is realized, and the performance of the nickel-iron layered hydroxide is improved. Chiral molecules with a proton acceptor function are introduced into a NiFe-LDH interlayer; due to the steric hindrance and coordination characteristics of chiral molecules, regular growth of NiFe-LDH laminates can be disrupted, and more lattice defects, edge sites and unsaturated coordination metal centers are induced to be generated. The coordination effect of chiral molecules and metal centers (Ni and Fe) can adjust the electronic state and valence state of metal, so that the reaction energy barrier is reduced, and the reaction kinetics is accelerated.

The invention discloses a sodium ion battery hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of carbon material synthesis and electrochemistry. The hard carbon negative electrode material is prepared by carrying out pre-oxidation treatment, inert atmosphere pyrolysis, constant-speed cooling and crushing treatment on an animal hair generating substance material. According to the invention, the corresponding relationship among the interlayer spacing, the micropore number and the surface oxygen-containing groups of the animal hair generating substance fiber under the preoxidation-inert atmosphere temperature-changing pyrolysis, the sodium storage capacity and the cycling stability is determined; the rabbit hair-based hard carbon negative electrode prepared under the optimal condition realizes the sodium storage specific capacity of 265.30 mAh g <-1 > and the capacity retention ratio of 88.55% after 300 cycles under the current density of 50mA g <-1 >. The low-cost large-scale preparation scheme of the hard carbon negative electrode material, which can be industrially popularized, provided by the invention provides technical reference for industrial development of the sodium-ion battery.

The application relates to the technical field of material synthesis, and provides a carbon nanotube and a preparation method thereof, the preparation method comprising the following steps: preparing a spinel crystal structure of FeCoMgO as a metal catalyst, the specific surface area of the metal catalyst being 220-300 cm 3 / g; introducing the metal catalyst and a carbon source into a carbon nanotube growth device, reacting under first reaction conditions to obtain a first reaction product; reacting the first reaction product under second reaction conditions to obtain a second reaction product; and crushing the second reaction product to obtain the carbon nanotube. Through the above scheme, the dispersibility of the carbon nanotube is improved, and the problem of uneven mixing of the carbon nanotube and a high polymer composite material in a short time is solved.

The present disclosure belongs to the technical field of material synthesis and utilization of renewable clean energy, and provides a red titanium dioxide heterojunction, and a preparation method therefor and the use thereof. The preparation method for a red titanium dioxide heterojunction comprises: forming a first precursor of B-doped titanium dioxide; calcining the first precursor at a high temperature to obtain a second precursor of a B-doped titanium dioxide heterojunction; and mixing any one of (NH4)2TiF6, NH4TiOF3 and (NH4)2TiOF4 with the second precursor, followed by a nitridation treatment in an ammonia gas flow to obtain a red titanium dioxide heterojunction uniformly doped with a rutile phase and an anatase phase. In the present disclosure, titanium dioxide in a rutile phase can be nitrided by means of an ammonium fluotitanate treatment, such that a red titanium dioxide heterojunction uniformly doped with both a rutile phase and an anatase phase is formed, which heterojunction exhibits relatively high water oxidation activity in a photocatalytic water decomposition reaction.

A material synthesis apparatus includes: at least one device configured to synthesize a material; a user interface configured to obtain information on a target product; and a processor, wherein the processor is configured to: determine synthesis conditions for preparing the target product using a pretrained synthesis prediction model; calculate a first synthesis method for preparing the target product based on the synthesis conditions; and control the at least one device based on the first synthesis method.

The invention relates to the technical field of high polymer material synthesis, in particular to a carbon dioxide-based polycarbonate type polyurethane polyurea material as well as a preparation method and application thereof. In the carbon dioxide-based polycarbonate type polyurethane polyurea material, carbon dioxide-based polycarbonate diol is used as a soft segment, a chain segment formed by reaction of diisocyanate, diamino disulphide and a micromolecular diol chain extender is used as a hard segment, and a melting method is adopted for polymerization in the preparation process. The polyurethane-polyurea material prepared by the invention has self-repairing capability when being damaged or scratched, can be pressed into a film or a coating to be used in the field of flexible electronic devices or automobile protective films, can ensure the durability of equipment, prolong the service life, reduce the maintenance cost, prolong the life cycle of a high polymer material, reduce pollution, and is suitable for industrial production. Meanwhile, the material takes carbon dioxide-based polycarbonate diol as one of main raw materials, and belongs to one of technologies for recycling carbon dioxide in carbon neutralization.

The invention relates to the field of combined application of MOF (Metal Organic Framework) crystal material synthesis and a sonodynamic antibacterial technology, in particular to an Eu-TCPP-SO4 crystal as well as a preparation method and application thereof. The rare earth-porphyrin complex Eu-TCPP-SO4 crystal with a specific crystal structure is constructed by virtue of coordination and self-assembly of europium nitrate pentahydrate, meso-tetra (4-carboxyl phenyl) porphyrin (TCPP) and sulfate ions. The Eu-TCPP-SO4 crystal disclosed by the invention as a sound-sensitive agent has high sound-sensitive activity and good stability, overcomes the limitations of low efficiency and poor stability of the sound-sensitive agent in the prior art, and can provide a safer and more effective solution for actual antibacterial application.

The invention relates to the technical field of high polymer material synthesis, in particular to a high-strength polycarbonate resin preparation method which comprises the following steps: 1, designing a fatigue life oriented monomer ratio; step 2, gradient polymerization of phase state perception: raising the temperature to a temperature T1 corresponding to a viscosity change rate threshold in the first stage, and maintaining until the distillation rate of a byproduct reaches a safety critical value; in the second stage, variable-rate cooling is implemented based on real-time cloud point detection, an end-capping reagent is injected at the critical point temperature T2 of terminal hydroxyl concentration, and the injection rate is linked with the pressure change rate of the reaction kettle; 3, amorphous confinement solid phase tackifying: treating the polymer particles in a moving bed dynamic temperature field, wherein the temperature field range is dynamically set according to the difference value between the glass transition temperature Tg and the crystallization starting temperature Tc; and step 4, performing electric field grading relaxation. Through the technical means of multi-stage temperature control, electric field adjustment, magnetic field orientation and the like, the molecular chain structure of the resin is comprehensively optimized, and the reliability of a final product in long-term use is ensured.

This invention provides a quasi-two-dimensional / two-dimensional van der Waals heterojunction based on SOI and Si / WS2, its preparation method, and its application. The method includes the following steps: cleaning the SOI substrate; using sulfur powder, tungsten oxide powder, sodium chloride powder as a catalyst, and erbium chloride and ytterbium chloride powder as dopants, chemical vapor deposition is performed on the SOI substrate to prepare an erbium- and ytterbium-doped monolayer WS2 material; the top silicon layer of the SOI substrate is an n-type silicon layer. This invention, employing the above-mentioned quasi-two-dimensional / two-dimensional van der Waals heterojunction based on SOI and Si / WS2, its preparation method, and its application, effectively reduces the defect density during material synthesis while significantly increasing the carrier concentration in the material. The prepared photodetector exhibits good photoelectric response performance, providing a simple and efficient new method for the preparation of high-performance heterojunction photodetectors.

The invention belongs to the technical field of high polymer material synthesis and heterogeneous catalysis, and particularly discloses an amino mesoporous silica supported copper catalyst as well as a preparation method and application thereof. The catalyst is prepared by a direct co-condensation method which comprises the following steps: in the presence of a structure-directing agent, copolymerizing a silicon source and amino silane to form a mesoporous silica carrier which has a regular mesoporous structure and is modified by amino in a skeleton; then loading cuprous through a solid-state ion exchange method in an inert atmosphere, and stably endowing highly dispersed cuprous (Cu < + >) with an active center through low-temperature heat treatment; the catalyst can be used for efficiently catalyzing oxidative coupling of phenol, and is particularly suitable for synthesizing polyphenyl ether with controllable number-average molecular weight and terminal functionality, the synthesized product is high in purity and narrow in molecular weight distribution, and the catalyst is particularly suitable for high-performance copper-clad plates, semiconductor packaging and other electronic chemicals.

The invention discloses a method for constructing a high-conductivity / heat-conductivity carbon material based on microwave induction, and belongs to the technical field of nano carbon material synthesis. According to the method, methane and auxiliary gas are introduced into a variable-frequency microwave vapor deposition system, and the microwave frequency is dynamically regulated and controlled within the range of 2.43-7.5 GHz, so that the methane cracking rate, plasma energy distribution and deposition kinetics are regulated; controllable deposition of multi-scale and multi-morphology composite carbon structures (carbon nanotubes, graphene-like and amorphous carbon) on the surface of a single substrate under the constant temperature condition is achieved, and therefore the microstructure and the electromagnetic response performance are optimized. According to the method, the frequency conversion microwave technology is introduced into a methane cracking deposition system for the first time, atomic-scale controllable deposition of the carbon material is achieved, complex temperature gradient control is avoided, and the obtained carbon-based material has high electric conductivity / heat conductivity, wide-frequency-band shielding effectiveness and excellent structural stability.

The invention belongs to the technical field of organic synthetic chemistry, and discloses a preparation method of an aromatic ketone compound, which comprises the following steps: by taking an unsaturated carbonyl compound obtained by condensing aryl acetaldehyde / acid and aldehyde / ketone molecules as a precursor, carrying out a reaction on the unsaturated carbonyl compound in the presence of a free radical precursor and molecular oxygen under the conditions of illumination and / or heating to obtain the aromatic ketone compound. And carrying out free radical mediated decarbonylation functionalization reaction in an organic solvent to obtain the aromatic ketone compound. The functional group contained in the free radical precursor is introduced to the alpha position of the ketone compound. By improving reaction participants and a reaction mechanism, the aromatic ketone compounds with various structures can be efficiently and highly selectively constructed in one step, the functionalization of the alpha position of the aromatic ketone compounds is synchronously realized, and the preparation method which is simple and convenient to operate, high in atom economy, green and environment-friendly is provided for the aromatic ketone compounds; the obtained compound is especially applicable to the fields of drug synthesis and synthesis of other materials.

The invention discloses a quasi-three-dimensional covalent organic framework material based on a two-dimensional substrate piled functional group, a preparation method and application of the quasi-three-dimensional covalent organic framework material in iodine adsorption, and the preparation method comprises the following steps: carrying out hydrothermal reaction on a mixture containing a phenyl compound, hexane (4-formylphenoxy) cyclotriphosphazene, 4-dimethylaminopyridine and water to obtain the quasi-three-dimensional covalent organic framework material based on the two-dimensional substrate piled functional group. The quasi-three-dimensional covalent organic framework material based on the two-dimensional substrate piled functional groups is obtained. According to the invention, a similar three-dimensional pore network is formed by orderly stacking two-dimensional substrates, and the three-dimensional covalent organic framework material has the characteristics of high specific surface area and strong structural stability of a three-dimensional covalent organic framework material; meanwhile, the problems that two-dimensional covalent organic framework materials are easy to peel off between layers and adsorption and mass transfer are limited are effectively solved, the defects that three-dimensional covalent organic framework materials are high in synthesis difficulty and poor in photoelectric property are avoided, and collaborative optimization of stability, adsorption efficiency and functional suitability is achieved.

The invention discloses a lithium-rich manganese-based positive electrode material with an in-situ spinel phase and a preparation method of the lithium-rich manganese-based positive electrode material, and belongs to the technical field of synthesis of lithium-rich manganese-based materials, the material has a layered-spinel integrated structure generated in situ in a layered structure matrix, and the spinel phase is uniformly distributed in a layered lattice and forms a coherent interface with a layered phase; the molar ratio of Mn < 3 + > to Mn < 4 + > in the material is 0.05-0.20; the D50 particle size of the material is 2-10 [mu] m, and the particles are spherical or sphere-like. According to the method, the uniformly distributed spinel phase can be generated in situ in the layered matrix, and a coherent interface is formed, so that the dynamic performance and the rate capability are remarkably improved.

The application belongs to the technical field of environmental material synthesis, and particularly relates to a method for synthesizing a composite film by means of NMP-induced surface self-corrosion assisted rapid spin coating and application thereof; the steps are as follows: firstly, PDI and PEDOT are prepared, then a photocatalyst is prepared by means of a microwave method and a surface imprinting technology, and then the photocatalyst is embedded in surface pores of a PVDF film by means of NMP-induced surface self-corrosion assisted rapid spin coating to prepare an imprinting composite film with high stability and high permeability; the imprinting PDI / PEDOT photocatalyst is firmly embedded in the surface pores of the PVDF film, the stability is effectively improved, and a high water flux and a high light degradation activity are maintained. In addition, the construction of a heterojunction structure and the existence of imprinting cavities endow the imprinting composite film with good self-cleaning performance, photocatalytic performance and significant selectivity, and the imprinting composite film has a wide application prospect.

The invention discloses a preparation method and application of a porous iridium nano-metal catalyst, and belongs to the field of material synthesis and electro-catalysis. Iridium acetylacetonate and copper acetylacetonate are used as precursors, an IrCu alloy nanosphere precursor is prepared through solvothermal reaction in an ethylene glycol and surfactant system, copper is removed through acid etching, and the porous iridium nano spherical catalyst (Ir-NS) is obtained. The catalyst has a three-dimensional porous spherical structure, active sites are concentrated on the surfaces of nanospheres and the edges of the walls of internal mesopores, catalytic active sites are enhanced due to the iridium nanosphere structure and uniform site exposure density, oxygen bubbles are quickly released, and the active sites are prevented from being covered by the bubbles. In an acid medium and proton exchange membrane water electrolysis anode oxygen evolution reaction, the catalyst shows low overpotential and long-term operation stability under low iridium loading capacity. The method is simple in process and low in cost, does not need an additional hard template, and has a good industrial application prospect.

The present application aims to provide a gradient pore distribution alumina carrier and a preparation method thereof, and belongs to the technical field of alumina material synthesis. After calcination of pseudo-boehmite, the present application immerses the pseudo-boehmite into an organic alkali solution twice for hydrothermal treatment. During the hydrothermal treatment, the alumina grains are rehydrated and secondarily grown to form elliptical flaky pseudo-boehmite with a morphology. The elliptical flaky particles are stacked to form a large number of macropore channels. During the shaping of the carrier, the content of the elliptical flaky pseudo-boehmite in the mixture is adjusted to prepare the alumina carrier with gradient distribution of the channels. The alumina carrier has a high content of macropores in the shell layer, and the channels are wide. The pore structure is beneficial to the diffusion of macromolecular reactants to the inside of the carrier, and at the same time, the surface of the carrier has a strong anti-clogging ability.

The application discloses a copper-zinc bimetallic organic metal framework compound and a synthesis method and application thereof, and is based on a hydrothermal solvent method and a strong alkali compound surface layer activation process to prepare a novel porous composite material, and the specific steps comprise zinc-based "core" layer MOF material synthesis, surface strengthening activation of the core layer material by using a strong alkali, copper-based loading, in-situ growth of a "shell" layer MOF, and application of the material to CO2 adsorption and capture; the optimal sample has a CO2 adsorption capacity of up to 151.8 cm 3 / g under normal temperature and pressure, a CO2 gas adsorption capacity of up to 271.2 cm 3 / g in a high pressure section, a separation coefficient of the material for 400 ppm CO2 / N2 is up to 26.34, a separation coefficient of the material for 40 / 60 v / v CO2 / H2 is up to 141.07, and after an adsorption-desorption cycle test, the adsorption capacity performance is still retained to be not less than 95%, compared with a traditional single-metal MOF material, the method can significantly improve the adsorption separation performance and stability of the material.

The application discloses a MOFs synthesis route multi-objective optimization method based on machine learning. The method is to collect the synthesis conditions of prepared Ce-UiO-66, and evaluate the defect content and thermal stability thereof through a thermogravimetric analysis curve, as initial data set; the data set is randomly divided into a training set and a test set, eight algorithms are adopted to model each performance of Ce-UiO-66 and select the proxy model for performance prediction; the target achievement probability (PA) value of each performance in the synthesis space is calculated and expanded into a multi-objective evaluation factor; the Ce-UiO-66 material is prepared; the obtained material is subjected to characterization test, if the test data does not meet the requirement, the data set and the proxy model are updated. The application has the advantages of low cost, short cycle and the like in optimizing the catalytic and stable performances of MOFs based on reliable experimental data and machine learning, and can be popularized to the design of synthesis routes of other materials.

The invention belongs to the technical field of catalytic material synthesis, and particularly relates to a method for preparing second metal modified beta-Mo2C, which comprises the following steps: placing a precursor in a plasma generator, introducing gaseous hydrocarbon as a carbon source into the plasma generator, simultaneously introducing hydrogen as a reducing gas, controlling the gas flow to be 100-200mL / min, controlling the volume ratio of C to H2 to be 1: 12-1: 2, and controlling the reaction temperature to be 20-30 DEG C; under the reduction carbonization action of the reaction gas, beta-Mo2C is generated; the precursor is a mixture of molybdenum salt and second metal salt, and the second metal is loaded on the beta-Mo2C in a simple substance form. The method has the advantages that the method is convenient to operate, a heat source is avoided, the prepared M-Mo2C material is uniform in granularity, low in surface carbon content and good in catalytic performance, and abundant active sites and diffusion environments are provided.

The application provides a high epoxy value p-cresol formaldehyde epoxy resin and a preparation method thereof, and relates to the technical field of polymer material synthesis. The preparation method realizes precise control of a chemical reaction path through a synergistic process of "segmented temperature control polycondensation-gradient base epoxidation-compound phase transfer catalysis-in-situ water removal", which directionally inhibits main side reactions such as epoxy ring opening and phenolic hydroxyl etherification, significantly improves the ring closure efficiency, and finally obtains the p-cresol formaldehyde epoxy resin with the following performances: an epoxy value of 0.50-0.54 eq / 100g (more than 10% higher than that of a traditional process), a hydrolytic chlorine content of less than 0.03%, and a hydrolyzable chlorine content of less than 0.01%, reaching the electronic grade standard. Through the technical scheme, the industry pain points of many side reactions, low epoxy value, high hydrolytic chlorine content, poor product flame retardancy and large raw material consumption of the existing process are effectively solved.

The invention belongs to the technical field of catalytic material synthesis, and particularly relates to a method for preparing supported second metal modified beta-Mo2C. A precursor is placed in a plasma generator, methane is introduced into the plasma generator to serve as a carbon source, meanwhile, hydrogen is introduced into the plasma generator to serve as reducing gas, the gas flow is 100-200 mL / min, the volume ratio of C to H2 is 1: 12-1: 2, and the reaction time is 30-60 min; under the reduction and carbonization action of the reaction gas, the supported beta-Mo2C is generated; the precursor is a mixture of ammonium molybdate and nitrate of a second metal, and the second metal is loaded on the beta-Mo2C in a simple substance form. The method has the advantages that the operation is convenient, the use of a heat source is avoided, and the prepared supported beta-Mo2C material is uniform in particle size, high in dispersity and good in catalytic performance.

The invention belongs to the field of material synthesis, and particularly relates to OCA of a rubber modified acrylate system and a preparation method of the OCA, and the OCA comprises matrix resin, a rubber modifier, a functional filler and an auxiliary agent; the matrix resin is selected from one or a combination of more of 2-ethylhexyl acrylate, methyl methacrylate and isobornyl acrylate; the rubber modifier is selected from one or a combination of more of natural rubber, butadiene styrene rubber, butadiene rubber, isoprene rubber and nitrile rubber; the functional filler is selected from nano silicon dioxide aerogel; the auxiliary agent is selected from one or a combination of more of a photoinitiator, a silane coupling agent, an antioxidant and an anti-ultraviolet aging agent. The problem of how to balance the OCA among low dielectric constant, high light transmittance, strong adhesion and flexibility is solved.