93 results about "Mercaptoacetic acid" patented technology

The invention belongs to the field of chemical engineering, and relates to a preparation method of a high-chroma bismuth vanadate pigment for a coating, which comprises the following steps: mixing a titanium-based ion sieve with an acidic vanadium leachate, filtering after the reaction is completed to obtain a first filtrate, adding mercaptoacetic acid into the first filtrate, and filtering after the reaction is completed to obtain a second filtrate; preparing a bismuth salt solution containing yttrium ions and zirconium ions, mixing the bismuth salt solution with the second filtrate, adjusting the pH value to be in linear gradient change from acidity to neutrality, heating to a first temperature at a set heating rate, aging, centrifuging and drying to obtain a precursor; and calcining the precursor at a second temperature to obtain the bismuth vanadate pigment. According to the method, the acid vanadium leaching solution is used as a raw material, and the bismuth vanadate pigment with high chromaticity and chemical stability is obtained while the production cost is reduced through an innovative ion sieve purification technology and lattice stabilization doping, so that the method has obvious economic benefits.

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The invention belongs to the technical field of corrugated paperboards, and is characterized in that wood fibers and modified bamboo fibers prepared by reaction of allyl bamboo fibers, 1, 4-butanediol di (mercaptoacetate) and magnolol are pulped, a biodegradable water-resistant auxiliary agent is added for hydrophobic modification, papermaking and shaping are carried out to prepare water-resistant base paper, and the water-resistant base paper is prepared by the following steps: pulping the modified bamboo fibers and the biodegradable water-resistant auxiliary agent. And finally, preparing a surface paper layer, a corrugated medium paper layer and an inner paper layer from the water-resistant raw paper, and bonding and pressing to obtain the corrugated board. Magnolol groups grafted on the surfaces of the modified bamboo fibers can improve the water absorption performance of the fibers, and the hydrophobicity of the corrugated board is improved through the synergistic effect of the magnolol groups and the biodegradable water-resistant auxiliaries; the surface of the biodegradable water-resistant auxiliary agent is embedded with a carboxylated nano-cellulose structure, so that the biodegradable water-resistant auxiliary agent has deformation resistance; the epoxidized soybean oil is used as a core part and has excellent hydrophobicity; through combination of a polyphenol structure of tannic acid and hydrogen bonds of water-resistant base paper fibers, the mechanical properties of the corrugated board are improved, and the corrugated board has excellent biodegradability, hydrophobicity and mechanical strength.

The invention discloses a lithium ion battery artificial graphite negative electrode material, a preparation method thereof and a lithium ion solid-state battery, and belongs to the technical field of lithium ion solid-state batteries. Carrying out flash evaporation Joule heating on the pretreated carbon source material in an inert atmosphere, then rapidly cooling to obtain a graphitized intermediate, and screening, washing and drying the graphitized intermediate; mixing and reacting the graphitized intermediate with strong acid under an ice bath condition, and oxidizing and expanding the graphitized intermediate to obtain expanded graphite; and mixing the expanded graphite with mercaptan acetic acid and ethyl acetate, adding a catalyst, and reacting for a certain time to obtain the artificial graphite negative electrode material of the lithium ion battery. According to the invention, by introducing a flash Joule pulse graphitization technology, sulfur-oxygen dual-function synergistic modification and structure-performance integrated design, three technical bottlenecks of a traditional artificial graphite negative electrode material are systematically solved: the rate capability is limited, the interface stability is poor and the volume expansion is obvious.

The invention relates to the technical field of coatings, in particular to graphene-based composite zinc powder primer as well as a preparation method and application thereof. The primer is formed by mixing and curing a component A and a component B, wherein the component A comprises organic bentonite, a polar additive, a mixed solvent, a silane coupling agent, a dispersing agent, epoxy resin, a defoaming agent, a flatting agent and graphene-modified zinc-tin composite powder; the component B comprises polyamide and a mixed solvent; the graphene-modified zinc-tin composite powder is prepared by the following steps: treating zinc powder to obtain carboxylated zinc powder, modifying the carboxylated zinc powder with mercaptoacetic acid and 4-mercaptophenyl acetic acid to obtain surface modified zinc powder, reacting the surface modified zinc powder with stannous chloride to obtain zinc-tin composite powder, and finally carrying out ball-milling compounding on the zinc-tin composite powder and graphene oxide. The anti-corrosion coating can effectively inhibit zinc powder agglomeration and enhance interface bonding, has excellent corrosion resistance, adhesive force and mechanical properties, and is suitable for metal corrosion resistance in severe environments such as ocean engineering and the like.

The application discloses a high viscosity-reducing polycarboxylic water reducing agent for ultra-high performance concrete and a preparation method thereof, and comprises the following steps: adding a metered amount of deionized water into a reaction container, and then adding a methyl allyl polyoxyethylene ether, sodium methallyl sulfonate, an alkyl acrylate, and styrene into the reaction container, stirring, and heating; adding a metered amount of hydrogen peroxide, and simultaneously dropping a mixed aqueous solution of acrylic acid AA and methoxy polyethylene glycol methacrylate MAA-MPEG and a mixed aqueous solution of mercaptoacetic acid and ascorbic acid; and after dropping, keeping warm. The prepared polycarboxylic water reducing agent can improve the dispersibility of the polycarboxylic water reducing agent, reduce the hydrophilicity of the whole polycarboxylic molecule, and obviously reduce the viscosity of concrete; under the premise that the concrete has good workability, the viscosity of high-grade concrete can be obviously reduced; the polycarboxylic water reducing agent has good adaptability to different types of cement, avoids the need to seek different types and structures of water reducing agents for different types of cement, and is beneficial to practical engineering application.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-strength polyurethane adhesive as well as a preparation method and application thereof. The adhesive is prepared by compounding a double-bond-terminated polyurethane prepolymer monomer and a multi-sulfydryl cross-linking agent. And the prepolymer monomer is synthesized by reacting 4, 4-diisocyanate dicyclohexylmethane and hydroxyethyl (meth) acrylate according to a molar ratio of 1: 2. The polythiol cross-linking agent is tetrakis (3-mercaptopropionic acid) pentaerythritol ester or tetrakis (2-mercaptoacetic acid) pentaerythritol ester. When in use, the two components are mixed and then coated on a base material, and the mixture is cured at 30-100 DEG C for 0.5-5 hours. The adhesive disclosed by the invention forms a compact network through multiple crosslinking mechanisms such as sulfydryl-alkene Michael addition, so that the adhesive has extremely high shear strength (up to more than 30MPa) and excellent heat resistance and aging resistance on metal, glass, glass fiber plates and the like.

This invention belongs to the field of analytical detection technology and relates to a method for detecting estradiol using a combination of organometallic framework enrichment and enzyme-linked immunosorbent assay (ELISA). A magnetic organometallic framework solid-phase extractant is used to enrich estradiol in the sample, followed by detection of the enriched estradiol using ELISA. The magnetic organometallic framework solid-phase extractant is prepared by subjecting mercaptoacetic acid-modified Fe3O4 particles, zirconium salt, and 2-amino-terephthalic acid to a solvothermal reaction at 110–130°C for 22–26 hours. The detection method provided by this invention has advantages such as short detection time, high sensitivity, good specificity, and high accuracy, thereby enabling the detection of trace amounts of estradiol in environmental water samples.

The invention provides a method for extracting sodium thioglycollate from ethionine ester synthesis wastewater, which comprises the steps of wastewater pH regulation, extraction, washing, reverse extraction and evaporation concentration, and is mainly applied to recovery of by-product sodium thioglycollate in ethionine ester production wastewater. The method can be used for deep separation of sodium thioglycolate and other impurity inorganic salts such as sodium chloride and sodium carbonate in other systems, can be used for extraction of sodium thioglycolate under a weak acidic condition, and does not have the problems of easy volatilization and high toxicity.

The application discloses a method for alcohol-assisted chemical bath deposition of an electron transport layer of a perovskite solar cell and the perovskite solar cell, and the method comprises the following steps: cleaning a substrate to obtain a clean conductive glass substrate; adding SnCl2.2H2O into an isobutyl alcohol aqueous solution, then adding urea, and then adding mercaptoacetic acid and concentrated hydrochloric acid to mix, so as to complete preparation of a chemical bath solution; placing the clean substrate into the chemical bath solution to soak and depositing reaction in an oven, and then performing cleaning and annealing treatment after the reaction is completed, so as to complete deposition of a SnO2 electron transport layer on the conductive glass substrate. The SnO2 electron transport layer deposited by the method for alcohol-assisted chemical bath deposition of an electron transport layer is more uniform, the agglomeration of nanoparticles is reduced, the transmittance of sunlight is higher, the utilization rate of sunlight of the perovskite solar cell is improved, the open-circuit voltage and the short-circuit current density of the cell are reduced, and therefore the photoelectric conversion efficiency of the perovskite solar cell is improved.

The invention discloses an industrial production method of a quinoline mercaptoacetic acid sulfonamide compound, which comprises the following steps: carrying out condensation reaction on an intermediate D-3 and methyl sulfonamide under the action of a condensing agent, concentrating under reduced pressure until no liquid flows out after the reaction is finished, adding acid, separating out a large amount of solid, filtering, pulping a filter cake with purified water, filtering and drying to obtain the quinoline mercaptoacetic acid sulfonamide compound. A compound D is obtained. The problems that in the prior art, the reaction yield is low, starting material impurities are contained, and the process is complex are solved, and the prepared compound D is low in cost, simple in process operation, high in yield, stable in quality and suitable for large-scale industrial production.

The application discloses a combined depressor for recovering scheelite from ultra-low-grade tungsten-molybdenum associated ore and a method, the combined depressor comprising sodium humate, sodium mercaptoacetate, ammonium citrate, sodium pyrophosphate, sodium fluosilicate and lead nitrate, and the six kinds of substances are configured into the combined depressor in a proportion of 1:1:(2-5):(1-5):(1-3):(2-5). The application aims at recovering scheelite from low-grade refractory ore, improves the separation effect of scheelite and gangue minerals, improves the scheelite recovery rate and the concentrate grade, and improves the economic benefit.

The invention provides an agent composition for improving the recovery rate of copper, nickel, iridium and rhodium in copper-nickel symbiotic sulfide ore, and the agent composition comprises the following raw materials in parts by mass: 85-90 parts of sodium diethyldithiocarbamate, 1-10 parts of mercaptoacetic acid-2-naphthylamine, 1-5 parts of furanformyl dioxime and 1-10 parts of dialkyl dithio-oxadiamide. The invention also provides a use method of the medicament composition. The use method comprises the step of adding the sodium diethyldithiocarbamate, the mercaptoacetic acid-2-naphthylamine, the furanformyl dioxime and the dialkyl dithio-oxadiamide at different time. The raw materials of the medicament provided by the invention are synergistically used, and recovery of independent iridium and rhodium minerals and iridium and rhodium minerals closely linked with (or wrapped by fine nickel sulfide and copper) fine nickel sulfide and copper in ores is considered.

The present application provides, in one embodiment, a cleaning method which is excellent in resin mask removal, and which can suppress corrosion and discoloration of copper. The present application relates, in one embodiment, to a cleaning method of a substrate, which includes a step of peeling a resin mask from a substrate having a copper-containing metal layer and the resin mask on a surface, using a cleaning agent composition containing an alkali agent (component A), an ammonium ion (NH4 + , component B), mercaptoacetic acid (component C), and water (component D), and the molar ratio (B / C) of component B to component C is 1.5 or more.

The invention belongs to the technical field of building material admixtures and relates to a water-reducing hydrated calcium silicate composite early strength agent as well as a preparation method and application thereof. Wherein the polycarboxylic acid water reducer comprises the following components: acrylic acid, methallyl alcohol polyoxyethylene ether, mercaptoacetic acid and 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone, and the molar ratio of the acrylic acid to the methallyl alcohol polyoxyethylene ether is (5-7): 1; the mercaptoacetic acid accounts for 0.8%-1.6% of the total mole number of the acrylic acid, and the 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone accounts for 0.84%-0.85% of the total mole number of the methallyl alcohol polyoxyethylene ether. According to the invention, the molecular structure of PCE is accurately designed, and PCE is used as a key regulating agent to actively regulate the nucleation process of C-S-H and the steric hindrance effect among particles, so that the aggregation tendency of the particles is inhibited, the small particle size of the product is ensured, and the long-term dispersion stability is given to the product.

The invention discloses a preparation method of a viscosity-reducing admixture based on machine-made sand concrete, and belongs to the technical field of energy conservation and environmental protection. The method comprises the following steps: adding silicon dioxide sol into a mixed solvent, adjusting the pH value, adding 3-(methylacryloyloxy) propyltrimethoxysilane, and carrying out a heating reaction to obtain a dispersion liquid; the preparation method comprises the following steps: mixing acrylic acid, methoxy polyethylene glycol methacrylate, 2-acrylamide-2-methylpropanesulfonic acid, 2-(methylacryloyloxy) ethyl dimethyl (3-sulfopropyl) ammonium inner salt and deionized water, adjusting the pH value, and adding ammonium persulfate for polymerization to obtain a first mother solution; adding the dispersion liquid and mercaptoacetic acid into the first mother solution, adding heptadecafluorodecyl trimethoxysilane, and heating to obtain a second mother solution; through a multi-scale composite strategy, interface lubrication and dispersion stability are realized, the viscosity of the machine-made sand concrete is remarkably reduced, the pumpability and compatibility are improved, and energy conservation and environmental protection are considered.

The invention discloses a composite adsorption material for synergistically removing ammonia gas and sulfide in a pet environment and a preparation method of the composite adsorption material, and belongs to the technical field of environment functional materials and gas purification. According to the composite adsorption material, zeolite and attapulgite are used as a porous inorganic matrix, an interface adhesion layer is constructed on the surface of the porous inorganic matrix through dopamine oxidation auto-agglutination, histidine-iron coordination is introduced to form enzyme-like active sites, meanwhile, a reversible sulfur capture structure is constructed through mercaptoacetic acid, a proton transfer network is constructed through phytic acid, and the porous matrix is subjected to synergistic modification; on the basis, zinc chloride, ferric nitrate, sodium carboxymethyl cellulose and polyvinyl alcohol are combined to prepare the composite adsorption material. According to the invention, by constructing a multi-stage synergistic system of bionic enzyme active sites, a dynamic sulfur capture structure and a proton transfer network, efficient synergistic removal of ammonia gas and hydrogen sulfide is realized, the stability and recycling performance of the material in a high-humidity environment are remarkably improved, and the material has a good application prospect.

The invention discloses a preparation method of an enhanced warp-knitted lace fabric, and aims to solve the problems that fibers such as cotton fibers with relatively high water absorption capacity do not have a quick-drying characteristic, have poor antibacterial performance after long-term retention of water, still go mouldy and stink, and are low in skin-friendly property. According to the technical scheme, the method is characterized by comprising the following steps that S1, spandex filaments are stretched to a certain drafting length, then nylon filaments are evenly wound on the outer surfaces of the stretched spandex filaments according to a certain twist degree, and the nylon elastic covering yarn is obtained. The antibacterial acarus killing layer is made of cotton fibers with high water absorption, and treatment is conducted through composite alkali liquor, alkali liquor, a mercaptoacetic acid solution and a silver nitrate solution in sequence in the preparation process, so that antibacterial substances can be stably embedded into the fibers instead of being only attached to the surface layers of the fibers, and the antibacterial acarus killing effect is achieved. Furthermore, good antibacterial performance can be kept in the states of multiple times of water washing and long-term soaking.

The invention discloses a method for preparing ammonium thioglycolate from thionocarbamate production waste liquid, which comprises the following steps: 1) adding acid into the thionocarbamate production waste liquid to obtain a solution containing thioglycolic acid; (2) extracting the solution containing mercaptoacetic acid by adopting an extracting agent to obtain an extracting solution containing mercaptoacetic acid; the extraction agent comprises an amine extraction agent; and (3) carrying out back extraction on the extracting solution containing mercaptoacetic acid by adopting ammonia water, so as to obtain a back extraction solution containing ammonium mercaptoacetate. According to the method, ammonium thioglycolate is prepared from the thionocarbamate waste liquid, so that the problem of recycling the sodium thioglycolate waste water generated in the thionocarbamate production process is solved, and ammonium thioglycolate with relatively high economic value is obtained. In addition, the extraction process in the method can also realize separation of sodium salt and other organic impurities in the wastewater containing sodium thioglycollate.

This invention relates to the field of mineral processing flotation reagents, specifically disclosing a high-efficiency collector for the flotation of sphalerite and its preparation method. The high-efficiency collector provided by this invention achieves synergistic enhancement of the functions of each component by compounding isopropyl xanthate, dialkyl dithiocarbamate, and mercaptoacetate, and introducing a designed and synthesized polymeric synergist. The three basic collector components together constitute a dense and stable primary hydrophobic adsorption layer. The introduced synergist, on the one hand, enhances the adsorption strength and selectivity on the surface of sphalerite through multiple functional groups; on the other hand, its grafted hydrophilic polymer chains can form steric hindrance at the mineral-water interface and regulate local hydrophilicity and hydrophobicity, thereby further optimizing the hydrophobic state of the mineral surface and inhibiting gangue inclusions. The composite reagent provided by this invention improves the recovery rate of useful minerals while ensuring concentrate quality.

The invention relates to the technical field of photoelectric materials, in particular to a perovskite thin film material and a preparation method thereof. The thin film material comprises a conductive substrate and a narrow-band-gap perovskite layer, an intermediate interface modification layer and a wide-band-gap perovskite layer which are sequentially coated on the conductive substrate from bottom to top, the chemical general formula of the narrow-band-gap layer is MAmFAnPb1-cGecI3-gamma Br gamma, the chemical general formula of the wide-band-gap layer is FAxCsyPb1-aMaI3-beta Br beta, and the intermediate interface modification layer is formed by compounding mercaptoacetic acid and nano titanium dioxide. According to the material, through the synergistic effect of lamination band gap complementation, ion doping and composite interface modification, 400-1100 nm wide spectrum efficient absorption is achieved, the defect state density is remarkably reduced, the photoelectric conversion efficiency and the long-term stability are improved, and a key technical support is provided for perovskite solar cell industrialization.

This invention belongs to the field of materials preparation, specifically relating to a functionalized MOF composite material and its preparation method and its application in the purification of glycyrrhizin. The preparation steps of the functionalized MOF composite material of this invention are as follows: (1) 5-sulfonic acid isophthalic acid is added to a solvent, dissolved, mercaptoacetic acid is added, stirred, and a ligand solution is obtained; then a zinc salt solution is added, stirred, acetic acid is added to adjust the pH to 4-5, and an ion exchange resin is added to form a suspension; (2) the suspension is heated in a closed environment, reacted at a constant temperature, cooled, the precipitate is collected, washed, soaked, activated and dried to obtain Zn-MOF-SH; (3) Zn-MOF-SH is dispersed in a buffer solution, EDC and NHS are added sequentially, activated, and then glucosamine is added. The reaction is shaken at 30-45℃ for 6-12 hours, centrifuged, washed, and the functionalized MOF composite material is obtained. The MOF material of this invention can specifically recognize and adsorb glycyrrhizin molecules, achieving efficient and selective separation and purification of them.

This invention relates to the field of surface engineering technology, specifically to a low-temperature, rapid-curing microwave absorbing coating and its preparation method. The microwave absorbing coating, by mass percentage, comprises 20-80 wt% microwave absorbing agent, 20-80 wt% epoxy resin, 10-50 wt% diluent, and 2-7 wt% epoxy resin-modified polythiol. The preparation method includes the following steps: mixing the microwave absorbing agent, epoxy resin, and diluent in the specified mass percentages to obtain a mixed slurry; mixing pentaerythritol, mercaptoacetic acid, p-toluenesulfonic acid, and toluene and performing an esterification reaction; mixing the resulting polythiol with bisphenol A type epoxy resin to obtain epoxy resin-modified polythiol; mixing the epoxy resin-modified polythiol with the mixed slurry to obtain a microwave absorbing coating; spraying the microwave absorbing coating onto a substrate; and curing to obtain the microwave absorbing coating. The purpose of this low-temperature, rapid-curing microwave absorbing coating and its preparation method is to solve the problems of slow curing speed and poor environmental performance of microwave absorbing coatings at low temperatures.

The invention relates to the technical field of sewage treatment, and discloses a water purifying agent for water pollution and a preparation method thereof.The preparation method comprises the following steps that a polyvinyl alcohol solution is added into a chitosan solution to be stirred and mixed, modified plant bark continues to be added, stirring is conducted for 20-30 min at the room temperature, and the water purifying agent for water pollution is obtained; a preparation method of the modified plant skin comprises the following steps: adding a long-chain carboxyl intermediate and mercaptoacetic acid into an absolute ethyl alcohol solution, then continuously adding the pretreated plant skin, soaking and stirring to obtain the modified plant skin. Through the design of a chitosan-polyvinyl alcohol-modified plant skin composite system, various pollutants in sewage are synergistically removed: after the modified plant skin is modified by a long-chain carboxyl intermediate and thioglycollic acid, a large number of carboxyl (-COOH), sulfydryl (-SH) and other active adsorption sites are introduced to the surface, so that the chelating effect on heavy metal ions can be enhanced, and the heavy metal ions can be effectively removed; and organic pollutants can be adsorbed through Van der Waals' force and hydrogen-bond interaction.

The invention relates to the technical field of wig raw material treatment, and discloses a chemical treatment agent for improving the weight and hand feeling of animal hair for wig and a preparation process thereof, the chemical treatment agent comprises the following components by mass: 0.5%-2.0% of a protease enzyme preparation, 5%-10% of urea, 0.5%-2% of mercaptoacetic acid, 1%-5% of an organosilicon softener emulsion, 1%-5% of an emulsifier, and the balance of water. The balance is water and a buffer solution; the pH value of the treating agent is adjusted to be 8-10 in alkalinity. The protease enzyme preparation is one or a combination of more of alkaline protease, papain or compound protease, and the buffer solution is one of a phosphate buffer solution, a borax-sodium hydroxide buffer system or a sodium carbonate-sodium bicarbonate buffer system. The animal hair is treated by using a chemical treatment agent with a specific formula, so that the weight of the hair can be effectively reduced, and the whole wig is lighter. When the treated wig is worn, the head load bearing feeling of a user is obviously relieved, discomfort of the neck and the shoulders cannot be caused after the wig is worn for a long time, and the wearing comfort of the wig is greatly improved.

The application relates to a perovskite solar cell based on a tin oxide electronic transmission layer prepared by a chemical bath deposition method and a preparation method thereof. The cell is composed of an Au electrode, a spiro-OMeTAD hole transmission layer, a perovskite light absorption layer, a SnO2 electronic transmission layer and an FTO substrate from top to bottom. Mercaptoacetic acid TGA as a complexing agent in a traditional process is replaced by a strong action between citric acid and tin oxide, an effect of improving the tin oxide interface is achieved, and the tin oxide layer has better electronic transmission capacity. The solar cell improves the open circuit voltage of the perovskite solar cell device, thereby improving the device performance.

The present application belongs to the technical field of corrugated paperboard, and the water-resistant raw paper is prepared by beating wood fibers and modified bamboo fibers prepared by reacting allyl bamboo fibers, 1,4-butanediol di(mercaptoacetate) and magnolol, adding biodegradable water-resistant additives for hydrophobic modification, and then shaping; finally, the face paper layer, the corrugated core paper layer and the inner paper layer are prepared from the water-resistant raw paper, and the corrugated paperboard is prepared by bonding and pressing. The magnolol groups grafted on the surface of the modified bamboo fibers can improve the water absorption performance of the fibers, and the synergistic effect with the biodegradable water-resistant additives can improve the hydrophobic performance of the corrugated paperboard; the surface inlaying carboxylated nanocellulose structure of the biodegradable water-resistant additives has anti-deformation performance; the epoxy soybean oil as the core part has excellent hydrophobic performance; the hydrogen bond between the polyphenol structure of tannic acid and the fibers of the water-resistant raw paper can improve the mechanical performance of the corrugated paperboard, so that the corrugated paperboard has excellent biodegradability, hydrophobicity and mechanical strength.

The invention relates to the technical field of building materials, and particularly discloses a special admixture for self-compacting concrete as well as a preparation method and application thereof. Wherein preparation raw materials of the admixture special for the self-compacting concrete comprise a polycarboxylic acid water reducing agent, a slump retaining type water reducing agent, modified starch, a defoaming agent, an air entraining agent and water, and preparation raw materials of the polycarboxylic acid water reducing agent comprise, by weight, methyl allyl polyoxyethylene ether, hydroxyl polyethylene glycol acrylate, tween-80, sulfosalicylic acid, mercaptoacetic acid and ammonium persulfate; the slump-retaining water reducing agent is prepared from the following raw materials in parts by weight: isopentenol polyoxyethylene ether, acrylic acid, ester monomers, mercaptopropionic acid and potassium persulfate. According to the admixture special for the self-compacting concrete, a long side chain, a sulfonic acid group and an ester group are introduced in the forming process of the water reducing agent, the flow stability of the concrete in the construction process is improved, and good construction performance is kept.

The invention relates to the technical field of scale inhibitors, and discloses a preparation method of an anti-deposition type high-molecular scale inhibitor and application of the anti-deposition type high-molecular scale inhibitor in a refining system.The anti-deposition type high-molecular scale inhibitor is obtained through a polymerization reaction of dioxaoctyl bismaleamic acid and trimesic trimercaptoacetate, and the anti-deposition type high-molecular scale inhibitor contains a large number of carboxyl groups, amido bonds and other groups, so that the anti-deposition type high-molecular scale inhibitor is obtained. The scale inhibitor has a hyperbranched three-dimensional molecular chain structure, has many active sites, and can form a strong coordination complexing effect with metal ions such as calcium and the like, so that the scale inhibitor is adsorbed on the surface of a calcium carbonate crystal nucleus, the growth and aggregation of calcium carbonate are inhibited, and good calcium carbonate deposition resistance and scale inhibition effects are achieved. And the scale inhibitor has good high-temperature resistance, is not easy to thermally decompose, and is suitable for devices and equipment in a high-temperature environment of a refining system.

A polymer comprising chain transfer agent residues and a polymeric monomer is provided. The monomer may comprise (meth / ethyl / propyl)acrylamide or a derivative thereof; (meth / ethyl / propyl)acrylic acid or an acidic derivative thereof; C1-C18 alkyl (meth / ethyl / propyl)acrylate; hydroxyl-functionalized C1-C18 alkyl (meth / ethyl / propyl)acrylate, or combinations thereof. The chain transfer agent may be water-compatible. The chain transfer agent may comprise homocysteine ​​or a derivative thereof; C2-C18 monothiols and dithiols; C3-C12 ethylene glycol monothiols and dithiols; mercaptoacetic acid or a derivative thereof; or similar substances; or combinations thereof. At least one polymer terminus of the polymer may comprise a chain transfer agent residue. The connection between the polymer terminus and the chain transfer agent residue may comprise a sulfur atom. A method for preparing such a polymer is also provided.