37 results about "Macromolecular architecture" patented technology

This invention discloses a method and system for converting waste plastics into hydrogen based on microwave pretreatment and solar photocatalytic reforming, belonging to the field of solid waste resource utilization and clean energy technology. The method includes: mixing waste plastics with water for microwave pretreatment to destroy their macromolecular structure and generate a liquid-phase product rich in small-molecule organic matter; performing solid-liquid separation on the liquid-phase product; and conveying the separated liquid to a flat-plate photocatalytic reactor for photocatalytic reforming under sunlight irradiation and the action of a catalyst supported on a 3D-printed substrate to produce hydrogen and high-value chemicals. The system includes a microwave pretreatment unit, a filtration unit, and a flat-plate photocatalytic reaction unit connected in sequence. This invention achieves efficient, low-carbon, and high-value conversion of waste plastics through the synergy of microwave pretreatment and solar photocatalytic reforming, effectively overcoming the problems of high energy consumption, poor product selectivity, and low photocatalytic efficiency in existing technologies.

The application discloses a preparation method of organic garbage carbon source by composite enzyme combined with nitrogen precipitation. Firstly, enzyme pretreatment is performed on organic garbage materials, starch enzyme, cellulase and hemicellulase are used in cooperation to make macromolecular structure of organic matter be broken, so that preliminary release and partial dissolution of carbon source substances are realized; subsequently, sodium tetraphenylborate is added in the pretreatment system to selectively precipitate nitrogen substances in the solution, and centrifugal separation is performed to reduce nitrogen content of the system; on the basis, potassium persulfate and iron substances are added into the obtained suspension liquid to build a Fenton-like reaction system, residual organic macromolecules are further oxidized and degraded, and the structure is optimized, so that availability and stability of the carbon source are improved. In the whole process, each link cooperates, so that the organic garbage can be efficiently converted into high-quality carbon source with high C / N ratio and COD value, and can be used in a sewage treatment system as stable external carbon source.

The invention relates to a film material film processing device and method for a rotary kiln, the film material film processing device comprises a rotating shaft arranged in the center of the rotary kiln, a rotating shaft rotating speed adjusting mechanism and a plurality of film mechanisms vertically and fixedly arranged on the rotating shaft, the film mechanisms are rotationally arranged in the rotary kiln, and the rotating speed adjusting mechanism controls the rotating shaft to rotate; the adjusting rotation speed is related to the combustibility of the processed object; the solid waste and the hazardous waste in the furnace are pressed into a molten film state through the continuous rotary pushing and compacting effect of the film forming mechanism and are evenly distributed on the inner side wall face of the rotary kiln. By means of the material thinning mechanism, on one hand, the contact surface area of solid waste and hazardous waste and the wall face of the rotary kiln is increased, the heat exchange effect of the solid waste and hazardous waste and the rotary kiln is enhanced, and therefore the pyrolysis effect and combustion efficiency of the solid waste and hazardous waste are improved; and on the other hand, the fragmentation degree of macromolecular structures of solid waste and hazardous waste subjected to film treatment is more thorough, and pyrolysis is more thorough, so that the operation energy consumption of the secondary combustion chamber can be further reduced, and the overall operation efficiency of the system and the steam output quality are improved.

The invention discloses a cationic chromatographic filler preparation method based on RAFT (reversible addition-fragmentation chain transfer) polymerization, which comprises the following steps: synthesizing monodisperse linear polystyrene microsphere seeds by adopting a dispersion polymerization method, synthesizing polystyrene-divinyl benzene microspheres with high crosslinking degree by adopting a single-step seed swelling method, carrying out reversible addition-fragmentation chain transfer polymerization, and carrying out column packing by adopting a homogenization method. Compared with the traditional free radical polymerization, the preparation method not only retains the multifunctionality of the traditional free radical polymerization, but also solves the problem that the traditional free radical polymerization cannot well control the molecular weight and macromolecular structure, and is simple in process, convenient to operate and suitable for industrial production. The method has a potential application prospect in specific challenges of chromatographic separation and biomacromolecule separation.

The invention relates to a carbon molecular sieve and a preparation method thereof, and the preparation method of the carbon molecular sieve comprises the following steps: removing inorganic matters in biochar to less than 100 ppm; mixing the biochar and urea, and then putting the mixture into a reaction furnace to react and crosslink to form a macromolecular structure; grinding the macromolecular structure into biochar particles; mixing the biological coke particles with biological pyrolytic oil and water, and performing extrusion molding to obtain a carbon molecular sieve extrusion material; carbonizing the carbon molecular sieve extruded material in a rotary furnace; after carbonization is completed, water vapor is introduced into the rotary furnace for activation; after activation is completed, benzene is introduced into the rotary furnace for deposition, and the carbon molecular sieve is obtained. According to the carbon molecular sieve and the preparation method, the biochar is used as a carbon source, the raw material price is low, and the production cost is reduced.

The invention relates to a catalytic system based on at least one neodymocene borohydride, a co-catalyst which is a dialkylmagnesium compound of formula RB-Mg-RL, in which RB is a secondary alkyl of formula R2CH and RL is a primary alkyl of formula RCH2, the Rs, identical or different, being alkyls. The catalytic system addresses the objective of improved macrostructure control in a polymerization process of ethylene or a monomer mixture containing ethylene and a 1,3-diene.

This invention provides a bird safety glass film, its preparation method, and a bird safety glass assembly. By introducing specific types of silicon-containing monomers with a conjugated π-electron structure, liquid polysiloxane is prepared. Then, through cross-linking and curing, solid siloxane polymers are obtained from the liquid polysiloxane, forming a transparent macromolecular polymer film with a network structure. This film absorbs ultraviolet rays from sunlight while keeping visible light unaffected, thus achieving a visual effect that is visible to birds but transparent to humans. The network macromolecular structure results in a more uniform distribution of functional monomers and a more stable chemical state of functional groups, significantly improving the stability of the film or glass assembly and extending its service life, making it suitable for large-scale application.

The invention discloses a preparation method of castor oil-based biomass lubricant base oil, and belongs to the technical field of base oil. The preparation method comprises the following steps: ester exchange reaction, esterification reaction, epoxidation reaction, ring-opening reaction and bridging esterification reaction. The prepared base oil constructs a macromolecular structure through bridging esterification, so that the base oil is endowed with high viscosity; unstable carbon-carbon double bonds in the raw materials are eliminated through the epoxidation step, the flash point of the base oil is increased, and the service life of the oil product is prolonged; the introduced long-chain alkyl side chain effectively prevents molecules from crystallizing at low temperature, and the pour point is reduced; castor oil is used as an initial raw material, and the source is renewable; the final ester structure is easily decomposed by microorganisms and is environment-friendly; in a word, the biomass raw material is successfully converted into the base oil with'high viscosity index, low pour point, high flash point and good biodegradability 'through an innovative synthesis route, and the base oil has important application value in the technical field of base oil.

The application discloses a nanoscale organosilicon cluster phosphinic acid flame retardant and a preparation method thereof. The flame retardant is a reticular macromolecular structure flame retardant with group synergistic effect, which is prepared based on hypophosphorous acid, siloxane compound and free radical initiator. The flame retardant realizes the combination of siloxane and hypophosphorous acid in the same structure unit, and improves the flame retardant efficiency. Meanwhile, the structure unit contains hydroxyl functional groups, crosslinking with a matrix such as epoxy resin to improve the crosslinking density. The polymer particle size reaches the nanoscale through a physical method, and the mechanical properties of the material are improved. In addition, the application has high yield, and the preparation process and product post-processing process operation are simple. The flame retardant has the characteristics of high flame retardant efficiency and excellent compatibility, and is a halogen-free high-efficiency phosphorus-silicon synergistic flame retardant.

The preparation method comprises the following steps: adding 5-30 parts of tannic acid into a low-boiling-point polar solvent, adding 2-40 parts of isocyanate under stirring and nitrogen protection, carrying out a stirring reaction at room temperature to 70 DEG C for 0.5-10 h, adding 1-20 parts of hydroxyethyl acrylate, continuously carrying out a reaction at room temperature to 70 DEG C for 0.5-10 h, and carrying out a reaction at room temperature to 70 DEG C for 0.5-10 h so as to obtain the delayed-light-curing environment-friendly adhesive composition. The preparation method comprises the following steps: adding 5-30 parts of epoxidized soybean oil acrylic resin, 1-30 parts of bisphenol epoxy acrylate and 1-20 parts of a diluent, uniformly stirring, adding 1-6 parts of a cationic photoinitiator and 0.5-4 parts of a free radical photoinitiator, stirring, and evaporating to remove a solvent under reduced pressure to obtain the adhesive. The property of a natural material tannic acid is utilized, isocyanate is used for blocking to form a macromolecular structure containing isocyanate, the bonding strength of the adhesive is enhanced through introduction of an isocyanate group and bisphenol epoxy acrylate, the epoxidized soybean oil acrylic resin has the characteristics of being green and low in toxicity, and as one of the components of the adhesive, the epoxy soybean oil acrylic resin has the advantages of being environmentally friendly and low in toxicity. And the safety of the product can be obviously improved.

The application discloses polyacrylonitrile primary fiber, polyacrylonitrile fiber and a preparation method and application thereof, and belongs to the technical field of high polymer materials and fiber manufacturing. A part of cyano groups on a molecular chain is converted into carboxylic acid salt by performing a partial hydrolysis reaction on polyacrylonitrile in a mixed system of an organic solvent and an inorganic alkali aqueous solution through ultrasonic assistance; the hydrolysis product is dissolved to prepare a spinning solution, and after jetting, in-situ acidification and coagulation and stretching in a coagulation bath containing a protonic acid, a polyacrylonitrile primary fiber containing a carboxyl group is obtained. After washing and stretching, the primary fiber is crosslinked and heat-drawn under high-temperature and negative-pressure conditions, so that the carboxyl groups between the molecular chains are dehydrated to form anhydride bonds, a three-dimensional network macromolecular structure is constructed, and a high-strength polyacrylonitrile fiber is obtained through relaxation and heat setting. The polyacrylonitrile fiber has a breaking strength greater than 9.0 cN / dtex, has the advantages of high strength, stable structure and strong controllability of process, and can be suitable for industrialized production of high-strength polyacrylonitrile fiber.

Provided herein are macromolecular structures comprising a surface, tethered moiety, and a macromolecular chain, compositions thereof, and methods of making the same. Also provided herein are systems and kits comprising the macromolecular structures.

The invention relates to the technical field of food processing, and discloses tremella aurantialba and blueberry anthocyanin synergistic antioxidant jelly and a preparation method thereof.The jelly is prepared from, by weight, tremella aurantialba polysaccharide, blueberry anthocyanin extract, a sweetening agent, a pH regulator and water. The beverage is prepared from the following raw material components: 2.0 to 5.0 percent of tremella aurantialba polysaccharide, 0.1 to 0.5 percent of blueberry anthocyanin extract, 5.0 to 10.0 percent of sweetening agent, 0.05 to 0.2 percent of pH (Potential of Hydrogen) regulator and the balance of water. Hydroxyl of tremella aurantialba polysaccharide can remove part of free radicals, meanwhile, the macromolecular structure of the tremella aurantialba polysaccharide can serve as a carrier to wrap anthocyanin molecules and promote dispersion and absorption of anthocyanin, blueberry anthocyanin efficiently removes the free radicals through electron transfer of phenolic hydroxyl, and under the synergistic effect of the tremella aurantialba polysaccharide and the blueberry anthocyanin, the DPPH free radical scavenging rate of the jelly is larger than 90%. Compared with single tremella aurantialba polysaccharide jelly, the removal rate is increased by 50-60%, and compared with single blueberry anthocyanin jelly, the removal rate is increased by more than three%, and the antioxidant function is remarkably enhanced.

The invention discloses a method for preparing an organic garbage carbon source by combining compound enzyme with nitrogen precipitation. The method comprises the following steps: firstly, carrying out enzyme pretreatment on an organic garbage material, and breaking a macromolecular structure of an organic matter by adopting a synergistic effect of amylase, cellulase and hemicellulase, so as to realize primary release and partial dissolution of a carbon source substance; then, sodium tetraphenylborate is added into the pretreatment system, nitrogen substances in the solution are selectively precipitated, and the nitrogen content of the system is reduced through centrifugal separation; on the basis, potassium persulfate and iron substances are added into the obtained turbid liquid, a Fenton-like reaction system is constructed, residual organic macromolecules are further oxidized and degraded, and the structure of the residual organic macromolecules is optimized, so that the availability and the stability of a carbon source are improved. In the whole technological process, all links have a synergistic effect, so that the organic garbage can be efficiently converted into a high-quality carbon source with a relatively high C / N ratio and a relatively high COD value, and the carbon source can be used as a stable exogenous carbon source in a sewage treatment system.

The invention relates to the technical field of sewage treatment, in particular to a sulfur removal agent for sulfur-containing gas field produced water. The sulfur removal agent for the sulfur-containing gas field produced water, provided by the invention, is double interpenetrating network aerogel formed by double interpenetrating cross-linking of molecular chain phases of polyacrylamide and sulfonyl hydrazone modified guar gum. By interpenetrating molecular chains of polyacrylamide and modified guar gum, the obtained double interpenetrating network aerogel not only has the characteristics of polyhydroxy, carbonyl, good salt tolerance and macromolecular structure of guar gum, but also has the characteristics of rigid skeleton and abundant network structure of polyacrylamide; according to the present invention, the electrostatic acting force, the hydrogen-bond interaction, the intermolecular acting force and the adsorption effect among different functional groups such as the amino group, the hydroxyl group and the carbonyl group cooperate with each other, such that the S < 2-> in the weakly acidic or weakly alkaline (pH value is 6.5-9.5) sulfur-containing sewage can be effectively treated, the corrosion to the equipment cannot be caused, and the desulfurization agent is suitable for the desulfurization treatment of the sulfur-containing gas field produced water in different acid-base environments;

The invention provides acne-removing essence cream based on plant extraction components and a preparation method thereof. A macromolecular emulsifier 1 and a macromolecular emulsifier 2 are added into the acne-removing essence cream. The macromolecular emulsifier 1 is a product obtained by esterifying PEG100 stearate and acrylic acid and then carrying out free radical polymerization; the macromolecular emulsifier 2 is a product obtained by esterifying cetearyl glucoside and acrylic acid and then carrying out free radical polymerization on the esterified cetearyl glucoside and acrylic acid. Both the macromolecular emulsifier 1 and the macromolecular emulsifier 2 have macromolecular structures, so that the viscosity of the system can be improved, and meanwhile, a mutually wound network structure is easily formed among macromolecular chains, so that the cohesion of the system can be improved, and the viscosity of the system can be maintained. And on the other hand, a polymerization unit of the macromolecular emulsifier 2 contains a large number of hydroxyl groups, the density of hydrogen bonds after polymerization can be greatly improved, and the macromolecular emulsifier 2 can be more tightly combined with other components, so that the stability of the system is enhanced, and the viscosity of the system can be further stabilized.

The present application belongs to the technical field of one-component moisture-cured polyurethane sealant, and relates to a weather-resistant polyurethane plasticizer, a polyurethane bonding sealant for rail transit window glass, and a preparation method and application thereof.A weather-resistant polyurethane plasticizer is obtained by carrying out a first-step polymerization reaction of a diisocyanate compound and a polyether diol, and then adding an excess of 1,2,2,6,6-pentamethylpiperidinol to carry out a second-step polymerization reaction to completely cap the isocyanate groups.The polyurethane bonding sealant for rail transit window glass prepared by using the weather-resistant polyurethane plasticizer can continuously remove harmful free radicals generated by material aging, block photo-oxygen aging chain reactions, and thus improve weather resistance.In addition, the weather-resistant plasticizer has a macromolecular structure, is difficult to migrate, has excellent environmental protection, and can remain stable in a long-term fatigue vibration environment, and is not prone to problems such as mechanical property attenuation, hardness increase, or elongation rate decrease.

The application relates to the technical field of paint, and discloses a waterproof coating for buildings and a manufacturing method thereof. The waterproof coating is formed by mixing epoxy resin as a film-forming material and palygorskite modified material as an auxiliary material. The palygorskite modified material is prepared by grafting a polymer macromolecule with an ether bond on the surface of palygorskite and the polymer macromolecule has a long fatty chain-benzene fluoride alternating structure. The benzene ring structure in the polymer macromolecule structure can form a pi-pi conjugation effect with the benzene ring in the epoxy resin structure, so that the interface effect between the palygorskite and the epoxy resin can be improved, the palygorskite can efficiently play its own effect, the strength of the coating can be enhanced, the existence of the molecular chain of the polymer macromolecule structure can endow the coating with a super-hydrophobic effect similar to that of a lotus leaf, and thus the permeation of water can be effectively prevented and the waterproof performance of the coating can be improved.

The subject matter described herein is directed to molecularly engineered brush-like graft copolymer elastomers and applications thereof. The developed formulation platform is based on the synthesis of brush-like graft copolymer networks with engineered macromolecular architecture composed of brush-like polymers, such as combs and bottlebrush polymers, and block copolymers composed of combinations of brush and linear blocks, with capability of bearing desired chemical functionalities, for example, brush side-chains, chain-ends, and / or brush backbone.

The invention discloses a method for producing nitro-humic acid by nitric acid-ozone combined oxidation of lignite, which comprises the following steps: adding dilute nitric acid into ground pulverized coal, carrying out water bath treatment, and carrying out ozone oxidation experiments twice to obtain nitro-humic acid; nitric acid can attack aromatic rings and fat side chains in a coal macromolecular structure, so that a macromolecular net structure in the coal is preliminarily degraded, and then oxygen free radicals generated by ozone attack relatively strong bridged bonds in the coal to further crack the bridged bonds, so that the macromolecular structure of the coal is deeply depolymerized; according to the ozone oxidation experiment, acetic acid is used as a solvent, nitric acid modified Shengli lignite (NASL) is subjected to ozone oxidation twice to obtain oxidized solid residues and oxidation products, and the organic matter conversion rate of ozone oxidation depolymerization of NASL is 81.55% and the solvent soluble substance yield is 82.38%; the Shengli lignite is degraded step by step in a nitric acid and ozone combined oxidation mode, so that nitric acid and ozone combined oxidation depolymerization is a promising method for efficiently extracting nitro humic acid from coal.

A neurotransmitter moiety, dopamine, was chemically modified with a nitro-group to explore its influence on synthesizing a multifunctional biomaterial for therapeutic applications. Chemically, by manipulating the aromatic-electron density. while nitro-group prevented the self-oxidation of catecholic domain. this facilitated the aromatic suturing of nitrocatechol moieties, forming a novel macromolecular structure. Incorporation of the sutured-nitrocatecholic moieties in a gelatin-based hydrogel introduced extended pi-electron delocalization mediated electroconductive microenvironment and maintained its adhesive properties originated from the catecholic domains, forming a multi-functional bioadhesive for tissue repairing. Embodiments of the invention include engineered hydrogels enriched with multi-mode noncovalent interactions and excellent mechano-physical properties that are useful for diverse biomedical applications.

The invention provides a gel electrode suitable for training in plateau cold regions and a preparation method of the gel electrode, and belongs to the technical field of gel electrodes. The method comprises the following steps: dip-coating a fiber base material in a hydrogel precursor solution, crosslinking, dehydrating, and immersing in a hydrophobic composite electrolyte solution to obtain a target electrode. The hydrophobic composite electrolyte solution is formed by compounding fluorinated ionic liquid and hydrophobic fluorosilicone oil or perfluoropolyether, and by dehydrating a gel matrix and adopting a hydrophobic electrolyte system, the electrode does not swell and is prevented from adsorbing condensed water; due to the macromolecular structure characteristic of the electrolyte system, the electrolyte system can still keep stable form and performance in low-pressure, low-temperature and high-temperature environments; carbodiimide and transglutaminase are used for carrying out double crosslinking on biomass colloid, the biocompatibility is good, and the obtained crosslinked gel network has the characteristics of no dissolution and no melting. The method provides a key technical guarantee for long-term reliable monitoring in complex environments such as plateau alpine regions, low pressure and oxygen deficit.

This invention discloses a method for preparing and applying anionic waterborne polyaspartic acid ester resin. The preparation method is as follows: (1) reacting an aliphatic polyamine with dialkyl maleate to obtain polyaspartic acid ester; (2) performing an ester exchange reaction between the obtained polyaspartic acid ester and hydroxyalkyl sulfonate to obtain the anionic waterborne polyaspartic acid ester resin. This invention uses hydroxysulfonate to modify polyaspartic acid ester to obtain anionic waterborne polyaspartic acid ester resin with a dendritic macromolecular structure in which anionic sulfonic acid groups extend outward. It can achieve self-emulsification by using water as a solvent, and has better emulsification properties when combined with sulfonate-modified isocyanate curing agents. When applied to coatings, it can produce waterborne PAE polyurea coatings with high strength, high adhesion, and good wear resistance and corrosion resistance.

The invention provides a preparation method of a rapid photocuring cellulose-based macromolecular photoinitiator. According to the method, 2, 4, 6-trimethylbenzoyl phenylphosphonic acid is used as an initial molecule, an acylating chlorination intermediate with high reactivity is generated through oxalyl chloride activation, then the acylating chlorination intermediate and a cellulose main chain are subjected to a bonding reaction, and effective grafting of a photosensitive structure to a natural polymer skeleton is achieved. Then, esterification regulators such as acetyl bromide and the like are introduced, so that the arrangement and density of the grafting groups on the surface of the cellulose can be further improved, and the esterified cellulose photoinitiator with a uniform functionalization degree is obtained. The obtained initiating material shows good solubility and system adaptability in various acrylate monomers, and can rapidly initiate chain polymerization under ultraviolet irradiation, so that a formula system is converted into a curing network with a bonding function within an extremely short time. The acrylate material initiated by the photoinitiator can be cured within seconds to minutes under a common 365 nm light source. Compared with a small molecular initiator, the macromolecular structure effectively reduces the migration risk, avoids complex operation steps, has the advantages of clean raw materials, high safety, capability of being matched with various monomer systems and the like, and remarkably widens the utilization range of cellulose in the fields of photocuring adhesives and functional resin materials.

The pretreatment device comprises a box body, a hanging basket, a lye tank and an acid neutralization tank, wherein the hanging basket is transversely and movably arranged at the upper part of the box body and is used for containing tobacco plant residue particles; the lye tank is arranged below the hanging basket; the acid neutralization tank is arranged at the downstream of the lye tank along the moving direction of the hanging basket; the lye tank and the acid neutralization tank are respectively arranged on a bracket in the box body in a lifting manner; a liquid collecting tank capable of moving back and forth is arranged on the bracket of the acid neutralization tank, and is positioned between the hanging basket and the acid neutralization tank in the horizontal direction. By arranging the lye tank, tobacco plant residue particles are soaked in lye, cell walls of tobacco straws are deconstructed, and a natural macromolecular structure of lignin is reserved, so that tobacco plant residues are easier to compost and decompose; the acid neutralization tank is used for neutralizing alkali liquor, the pH value of biomass is adjusted to be neutral, and a microbial agent can be conveniently added into treated tobacco plant residue particles subsequently, so that decomposition of tobacco plant residues and conversion of nicotine are accelerated.

Provided herein are compositions, methods, systems, and kits for isolating one or more biomolecules from a biological solution. In some instances, the compositions, methods, systems, and kits provided herein may comprise one, two or more particles (e.g., comprising macromolecule structures) of differing surface charge. In some embodiments, the particles (e.g., comprising macromolecule structures) comprise a first particle (e.g., comprising a macromolecule structure) with a neutral to negative surface charge, and a second particle (e.g., comprising a macromolecule structure) with a greater negative surface charge than that of the first particle (e.g., comprising a macromolecule structure). In some instances, the combinations of particles provided herein provide for a synergistic relationship, enhancing the number of biomolecules that may be isolated, purified, identified, or the like from a biological solution.

The invention discloses an odor-removing film-forming agent for an automotive trim fabric and a preparation method, and belongs to the technical field of post-treatment odor-removing materials.The preparation method comprises the steps that waterborne polyurethane, carboxylated nano-silica, polyvinyl alcohol and other film-forming materials are placed in a high-temperature and high-pressure reaction kettle to react, and finally the waterborne film-forming agent is synthesized; the waterborne polyurethane can form a continuous thin film on a base material (automotive interior fabric), and the polyvinyl alcohol can improve the binding strength between the thin film and fibers after film forming. The carboxylated nano silicon dioxide particles can react with waterborne polyurethane and polyvinyl alcohol under high-temperature and high-pressure conditions to form a network macromolecular structure, so that the softness of a material formed by the film-forming agent can be improved, the material can be dispersed in an aqueous solution, and gaps among fibers can be filled with the carboxylated nano silicon dioxide particles; and after the prepared film-forming agent is used for treating the automobile interior fabric, a soft and compact film can be formed on the surface of the automobile interior fabric, so that the purpose of preventing the peculiar smell of the automobile interior fabric from being emitted is achieved.

The invention belongs to the technical field of oil-gas field development and unconventional natural gas extraction, and discloses a deep coal seam in-situ pore wettability characterization method based on molecular simulation. The method comprises the following steps: screening a coal macromolecular structure model, and constructing a deep coal seam coal matrix model by adopting a coal molecular structure unit; constructing a layered interface model for calculating different interfacial tensions, performing molecular dynamics simulation on the layered model, and recording a pressure tensor track; pressure tensor data in the dynamic simulation process is extracted, layered statistics is conducted in the Z direction, the interfacial tension is calculated based on a pressure tensor method, and then the contact angle is calculated to represent the wettability of the reservoir. The convergence condition of the pressure difference along with the displacement can be automatically monitored, and the real boundary of the volume phase and the interface phase is judged, so that the calculation error generated by the simulation box boundary effect is eliminated, and the interface tension calculation reliability is improved; the micromechanism of low efficiency at the initial stage of deep coal bed gas drainage and production is explained through the layered interface model, and the method has extremely high industrial application value.

The invention relates to the technical field of sodium ion batteries, and discloses a low-cost asphalt cross-linking agent and a preparation method of an asphalt-based hard carbon material of the low-cost asphalt cross-linking agent. The preparation process of the method comprises the following steps: (1) impurity removal and concentration; (2) hydrolysis; (3) polymerizing; and (4) carbonizing. According to the preparation method, a hydroxymethylfurfural solution with high-activity groups is prepared by taking sugar industry waste as a raw material, and further reacts with asphalt to form a macromolecular structure, so that the graphitization process in the high-temperature carbonization process is inhibited, and finally, the sodium-ion battery negative electrode hard carbon material with excellent sodium storage capacity and good cycle performance is prepared. The raw materials used in the invention are sugar industry wastes and petrochemical byproducts, the raw material sources are wide, the production cost of the hard carbon material is significantly reduced, the method has a wide mass production prospect, and an economic and efficient technical scheme is provided for industrial application of the hard carbon material.

The application relates to the technical field of materials, and discloses an antistatic PBT composite material and a preparation method thereof. The PBT composite material is added with auxiliary materials such as a compatilizer, short glass fibers and a modified carbon black additive. The modified carbon black additive is prepared by modifying a macromolecular structure material containing a large number of quaternary ammonium substituents of tetramethylpropylenediamine-polyphenyl ether alternating link on the surface of carbon black. The macromolecular structure material can form a pi-pi conjugation effect with PBT, can improve the compatibility between the carbon black and a polybutylene terephthalate matrix, can promote the uniform dispersion of the carbon black, the quaternary ammonium salt structure of the macromolecular structure material can form a bridge between carbon black particles and carbon black particles, and can form a perfect conductive path with the carbon black particles, thereby improving the antistatic performance of the composite material. The carbon black exists in the form of a crosslinking point, can efficiently utilize the effect of the carbon black as an inorganic additive, and can enhance the mechanical strength of the composite material.