270 results about "Lignosulfonates" patented technology

The invention belongs to the field of hydrometallurgy, and particularly discloses a high-purity vanadium oxide electrode and a preparation method thereof. The method comprises the following steps: pre-treating the alkaline vanadium leaching solution by using an activated aluminum oxide adsorption column to obtain a pre-treated solution; adding a composite impurity removal agent taking modified lignosulfonate as a main agent into the pretreatment liquid for primary impurity removal to obtain primary impurity-removed filtrate; adding a calcium hydroxide suspension and a flocculating agent into the primary impurity-removed filtrate for secondary impurity removal to obtain secondary impurity-removed filtrate; purifying the secondary impurity-removed filtrate by using an ion exchange column to obtain a purified solution; ammonium salt is added into the purified liquid for vanadium precipitation, and ammonium metavanadate crystals are obtained; calcining the ammonium metavanadate crystal to obtain high-purity vanadium pentoxide; and preparing the high-purity vanadium oxide electrode by using the high-purity vanadium pentoxide. According to the scheme, the high-purity vanadium pentoxide is prepared by taking the alkaline vanadium leaching solution as a raw material through a multi-stage deep impurity removal process, and the high-purity vanadium oxide electrode is prepared by taking the alkaline vanadium leaching solution as the raw material.

The invention discloses a method for preparing a polyvinyl polyamide composite reverse osmosis membrane by coupling reversed-phase interfacial polymerization with lignosulfonate, which adopts a reversed-phase interfacial polymerization method and comprises the following steps: firstly adding an oil phase containing polyacyl chloride, and then adding a water phase containing amine monomers and lignosulfonate. Molecules of the lignosulfonate contain more sulfonate radicals, so that the lignosulfonate is endowed with hydrophilicity, meanwhile, a large number of active functional groups such as phenolic hydroxyl groups, alcoholic hydroxyl groups and carboxymethyl exist, and oxygen atoms, sulfur atoms and the like in the functional groups contain unbonded electron pairs and can participate in interfacial polymerization reaction to form a cross-linked structure; the trade-off effect of the flux and the rejection rate of the reverse osmosis membrane is broken, and the polyvinyl polyamide reverse osmosis membrane with high flux and high rejection rate is obtained. The raw material of the polyethylene base material is low in price, and the product can be applied to the fields of water treatment, seawater desalination, brackish water desalination and the like on a large scale.

The invention discloses a lignin-inorganic oxide composite binder, preparation thereof and application of the lignin-inorganic oxide composite binder in a hard carbon negative electrode. The preparation method comprises the following steps: firstly, carrying out quaternization modification on lignosulfonate to obtain quaternized lignosulfonate, and then utilizing the action of quaternary ammonium and sulfonate of the quaternized lignosulfonate, hydroxyl and inorganic oxyacid radicals of inorganic nano oxide and carboxyl and hydroxyl of sodium carboxymethyl cellulose to prepare the modified lignosulfonate. The lignin-inorganic oxide composite binder with the interpenetrating network structure is formed. According to the binder, sodium carboxymethyl cellulose serves as a hard phase to enhance the mechanical rigidity, quaternized lignosulfonate rich in flexible long chains serves as a soft phase to bear part of loads, and inorganic nano oxide rich in hydroxyl serves as a crosslinking point or physical filler to enhance the structural stability of the binder. Besides, a multi-network structure formed by hydrogen bond crosslinking not only endows the binder with an excellent ion transmission rate, but also helps to enhance the interfacial compatibility of the binder with an ester electrolyte, thereby significantly improving the rate capability and cycle performance of the hard carbon negative electrode.

The invention provides a preparation method and application of a cationic dyeable polyester matting agent, and relates to the field of matting agent preparation, and the preparation method comprises the following steps: carrying out ultrasonic treatment on TiO2, a dispersing agent and a coating agent in ionized water; adding a lignosulfonate compound modifier, and performing spray drying to obtain superfine powder; and mixing with ethylene glycol and a dispersing agent to prepare the cationic polyester delustering agent. According to the invention, TiO2 is treated by using an ultrasonic coating technology, so that a compact protective layer is formed on the surface of TiO2, and adsorption and coordination of sulfonate groups are inhibited; a lignosulfonate compound is adopted to construct a core-shell structure, so that the steric hindrance of TiO2 is increased, and TiO2 is prevented from being agglomerated in a high-salt environment; the superfine powder is prepared by combining a spray airflow drying process, the process is simplified, the equipment requirement is low, the traditional concentration step can be omitted, and slurry with different concentrations and viscosities can be adapted. The obtained delustering agent has excellent dispersity in ethylene glycol and can be directly used for in-situ polymerization of cationic polyester, and efficient and continuous production is realized.

The invention discloses a preparation method of a lignosulfonate controlled-release drug-loaded capsule. The invention constructs a pH controlled release type lignin-based drug-loaded capsule around a three-stage delivery strategy of emulsion construction-electrostatic self-assembly-metal chelation. The preparation method specifically comprises the following steps: dissolving pesticide active ingredients and an emulsifier in an organic solvent to serve as an oil phase; dissolving lignosulfonate and a dispersing agent in water to serve as a water phase; mixing the oil phase and the water phase under stirring and homogenizing conditions to form O / W type emulsion; cationic monomers are added into the O / W type emulsion, a prototype of a shell layer is formed by means of electrostatic acting force, then the shell layer is cured by means of chelation of metal ions, and the lignosulfonate-based drug-loaded capsule loaded with pesticide is formed. The drug-loaded capsule prepared by the invention can shield ultraviolet light through the lignosulfonate metal complexing layer, has sensitive acid-base response performance, can realize the response controlled release process of encapsulated drugs, and effectively reduces the dosage of pesticides.

This synthetic stone can be used as electrical energy storage which acts like a supercapacitor and invention also discloses a preparation method thereof. According to this invention, geopolymer (11) and cement (12) are being taken as materials for an electrolyte. A supercapacitor of the present invention comprises a geopolymer (11) and cement matrix (1) and a positive and negative steel electrode (2, 3), whereby the steel electrodes (2, 3) are arranged in the matrix (1), and the matrix (1) is prepared from conductive mortar. The conductive mortar (1) comprises fly ash, cement (12), gravel and sand, alkali activator (KOH and SiO2) (13), and some additives (14) of synthetic stone compounds such as poly carboxylate ether, retarder, lignosulfonate, ethylene-vinyl acetate, hydroxypropyl methyl cellulose, pigment and carbon black. This supercapacitor synthetic stone is simple in structure and is based on a particular formulation.

The present invention is directed to a water-soluble granule compositions comprising 1-amino-1-cyclopropanecarboxylic acid (“ACC”), a filler selected from the group consisting of lactose, dextrose, sucrose or a mixture thereof, one or more wetting agents selected from the group consisting of a non-ionic ethoxylated sorbitan, a polyoxyethylene glycol alkyl ether and an anionic dioctyl sulfosuccinate, one or more binders selected from the group consisting of polyvinylpyrrolidone and a lignosulfonate and one or more organosilicon surfactants selected from the group consisting of a polyalkyleneoxide modified heptamethyltrisiloxane and a polyether trisiloxane.

The invention belongs to the technical field of cement-based material admixtures, and particularly relates to a preparation and performance regulation and control method of a cement expanding agent. The technical problems of large component fluctuation, unstable performance and excessive expansion prevention at present are solved. According to the method, magnesium oxide is treated through low-temperature calcination, surface treatment and nano coating, an auxiliary expansion source high-activity magnesium silicate mineral is introduced, and meanwhile, a bio-based polymer crystal form regulating agent is doped to modify lignosulfonate to regulate the crystallization process of a hydration product, so that the expansion performance is controllable and stable and does not change drastically due to fluctuation of raw materials; excessive expansion is avoided while concrete shrinkage is effectively compensated, and cracking damage of a set cement structure is prevented.

The invention relates to a lead-acid battery negative electrode additive as well as a preparation method and application thereof, and belongs to the technical field of lead-acid storage batteries. The additive consists of sulfonated modified lignosulfonate (component A), a graphene oxide-carbon nanotube hybrid conductive agent (component B) and a mixture of modified humic acid and boric acid (component C) which are respectively used as a crystallization template agent, a conductive network construction agent and an interface film forming regulator. During preparation, a component A is prepared through a sulfomethylation reaction, a component B is prepared through ultrasonic mixing of graphene oxide and a carbon nanotube dispersion liquid, a component C is prepared after humic acid is subjected to acid pickling purification and oxidation treatment and then mixed with boric acid, and finally the three components are mixed to obtain a finished product. The additive is added into the negative electrode lead paste, can inhibit negative electrode sulfation, improve electrode conductivity, reduce hydrogen evolution side reaction and prolong the cycle life and charge-discharge efficiency of the battery, and is suitable for production of various lead-acid batteries.

The invention belongs to the field of drafting rubber rings for spinning, and particularly provides a rubber ring and a preparation method thereof.The rubber ring is characterized by comprising an inner rubber layer, a reinforcing layer and an outer rubber layer which are sequentially compounded from inside to outside; the outer rubber layer is prepared by mixing the following raw materials in parts by weight: 90-100 parts of rubber, 10-20 parts of phenolic resin, 2-3 parts of an anti-aging agent, 2-3 parts of an accelerant, 5-8 parts of sulfur, 2-3 parts of zinc oxide, 0.5-2 parts of stearic acid, 3-5 parts of talcum powder, 2-5 parts of a modified copolymer and 3-5 parts of lignosulfonate; the modified copolymer is a copolymer of sulphobetaine methacrylate and glycidyl methacrylate; the prepared upper rubber ring outer rubber layer is good in drafting spinning stability, and the problem of sticky spots can be solved.

The invention provides a high-temperature-resistant oil well cement retarder and a preparation method thereof, and relates to the technical field of cement retarder materials. The high-temperature-resistant oil well cement retarder is prepared from the following materials in parts by weight: 30 to 40 parts of sulfo-siloxane grafted lignosulfonate, 5 to 10 parts of self-repairing microcapsules, 5 to 8 parts of zinc oxide, 2 to 3 parts of hexagonal boron nitride nanosheets, 1 to 2 parts of pH buffering agent, 2 to 4 parts of polycarboxylic acid water reducing agent and 8 to 12 parts of deionized water. According to the high-temperature-resistant oil well cement retarder disclosed by the invention, the temperature resistance of the high-temperature-resistant oil well cement retarder is improved; the phenomena of bulging, core wrapping and the like in a high-temperature experiment are avoided; the dispersion uniformity of the high-temperature-resistant oil well cement retarder on cement particles is improved, and local premature solidification or excessive retarding in cement paste is prevented; the problem that the strength is reduced due to the fact that retarder components are adsorbed on the surfaces of cement particles to hinder formation and growth of hydration products is solved.

The invention discloses a soil-improving growth-promoting modified lignin soil conditioner and a preparation method thereof, and belongs to the technical field of high polymer materials and soil improvement. The modified lignin soil conditioner comprises an agent A, an agent B and an agent C, the agent A is a cationic modified lignin polymer and is prepared by graft copolymerization of lignosulfonate and a cationic monomer in a free radical initiation mode; the agent B is lignin controlled-release particles and is prepared by wrapping an amino acid amphoteric regulator in the cationic modified lignin polymer and another negative charge natural polymer through electrostatic intercalation self-assembly; the agent C is at least one of citric acid, lactic acid, itaconic acid, fulvic acid, wood vinegar, maleic acid, maleic anhydride and polyacrylic acid. The soil conditioner disclosed by the invention has the advantages of low cost, environment friendliness and efficient repairing performance, and an innovative solution is provided for agricultural soil improvement.

The present application relates to a kind of composite phosphorus-free scale inhibitor and its preparation method, including 800-1200 parts by weight of desalted water, 1-3 parts by weight of modified lignin sulfonate, 2-4 parts by weight of calcium magnesium acetate, 0.5-1.5 parts by weight of azole, 400-600 parts by weight of soluble inorganic zinc salt and 50-150 parts by weight of copolymer A.The composite phosphorus-free scale inhibitor provided by the present application is clear and transparent concentrate, after the above concentrate is added to circulating water, the effective ingredient in it can form soluble chelate with Ca 2+ , Mg 2+ Forming, increase the saturation solubility of ion, hinder micro-fouling lattice formation, distort crystal growth, so that microcrystalline will not accumulate into scale, and can make old scale loose, gradually shed old scale;At the same time, the special corrosion inhibitor and other corrosion inhibitor produce synergistic effect, which can effectively control the pitting of stainless steel, achieve the purpose of preventing scale, and fundamentally reduce the efficiency of corrosion and scale inhibition.

The invention relates to the technical field of muck modifying agents, in particular to a muck modifying agent based on shield construction and a construction method, and the muck modifying agent comprises the following raw materials: a composite foaming agent, modified bentonite, carboxymethyl cellulose and lignosulfonate. The composite foaming agent significantly reduces surface tension through betaine, and enhances the foam stability in combination with nano-silica, thereby improving the foaming efficiency; the nano silicon dioxide is embedded into a foam liquid film to form mechanical support, and the abelmoschus manihot gum delays liquid drainage through a thickening effect, prolongs the half-life period of foam and ensures continuous wetting of the muck. Bentonite is modified through acidification of oxalic acid, the interlayer spacing is enlarged, the water absorption capacity is improved, meanwhile, long-acting water locking is achieved through hydrophilic groups of lauryl sodium sulfate, and the residue soil humidity is maintained; anion modification of lauryl sodium sulfate enables the surface of bentonite to be negatively charged, the surface of bentonite and an anion modifier generate like-pole repulsion, the flocculation phenomenon is avoided, and therefore the uniformity of a system is improved.

The invention discloses an environment-friendly concrete water reducing agent and a preparation method thereof. The water reducing agent is prepared from the following raw materials in parts by weight: 25 to 60 parts of polycarboxylic acid water reducing agent mother liquor, 1.5 to 3 parts of modified early strength agent, 0.1 to 0.6 part of defoaming agent, 6 to 15 parts of water-retaining agent, 1.5 to 3.5 parts of dispersing agent, 0.4 to 1.2 parts of air entraining agent and 3 to 6 parts of retarder. The preparation method comprises the following steps: dissolving lignosulfonate in water, adjusting the pH value to 9-11, adding hydrogen peroxide, carrying out a reaction at 60-65 DEG C for 2-4 h, and carrying out drying so as to obtain modified lignosulfonate; the modified early strength agent is prepared from sodium citrate, nano silicon dioxide and a silane coupling agent according to the weight ratio of (3 to 5): 1: (0.08 to 0.12). The water reducer provided by the invention has the advantages of efficient water reduction, stable delayed coagulation, early strength and coagulation promotion and environmental friendliness.

The invention belongs to the field of luminescent materials, and provides a lignin-based long-afterglow luminescent material as well as a preparation method and application thereof. The preparation method of the long-afterglow luminescent material comprises the following steps: uniformly grinding urea, boric acid and lignosulfonate, placing the obtained solid mixture in an open beaker for heating treatment, naturally cooling to room temperature after the reaction is completed, and grinding to obtain the long-afterglow luminescent material. The obtained long-afterglow luminescent material powder can emit yellow green afterglow after being excited and removed by ultraviolet light, the average attenuation life of the long-afterglow luminescent material powder can reach 1200 ms or above, the macroscopic afterglow emission time can reach 10 s or above, and the long-afterglow luminescent material powder is convenient to prepare, low in raw material cost and environmentally friendly. The obtained long-afterglow luminescent material has important application in the fields of information encryption, biochemical sensing and the like.

The invention discloses a self-filling slow-release gel material as well as a preparation method and application thereof, and the self-filling slow-release gel material provided by the invention comprises a gel base material and a moisture absorption compound loaded on the gel base material, wherein the gel base material contains a hydrophilic polymer, lignosulfonate and an optional photo-thermal conversion material. The self-irrigation slow-release type gel material can effectively collect moisture in the atmosphere, has the characteristic of high water absorption rate, shows the characteristic of rapid adsorption kinetics and the characteristic of relatively high water absorption rate, can load nutritional ingredients on the gel base material, and can be applied to the process of clean water production or soil layer construction in an arid region, so that the soil layer construction efficiency is improved, and the soil layer construction efficiency is improved. The device can continuously provide irrigation for plants by taking air as a water source, realizes the functions of self-water supply and slow-release fertilization, solves the problems of water resources and difficult plant survival in arid, semi-arid and seasonal lacking areas, and has potential commercial value and application prospect.

The invention belongs to the technical field of agricultural soil conditioners, and particularly relates to a soil conditioner, a preparation method and application. The invention provides a soil conditioner. The soil conditioner comprises fermented sludge, modified bentonite and lignosulfonate, the mass ratio of the fermented sludge to the modified bentonite to the lignosulfonate is (6-8): (2-3): (1-3). When the soil conditioner is applied to saline alkali soil, the pH value of the soil can be reduced, the organic matter content of the soil can be increased, the microbial diversity index (Shannon index) of the soil can be increased, and heavy metal in the soil can be passivated; meanwhile, the soil conductivity value is reduced. Compared with a traditional lime improvement method, the soil conditioner can avoid the risk of secondary alkalization and is good in application effect.

The invention relates to the technical field of melamine resin high polymer materials, in particular to a high-heat-resistance melamine resin composite material which comprises a first component and a second component. The first component comprises a modified melamine resin prepolymer, a crosslinking accelerator, a curing agent and a first dispersing agent; the modified melamine resin prepolymer is prepared by modifying a melamine resin prepolymer through lignosulfonate and modified nano cellulose whiskers; the modified nano cellulose whiskers are prepared by modifying nano cellulose whiskers through a silane coupling agent; the second component comprises a composite reinforcing material; the composite reinforcing material comprises a carboxylated carbon nanotube, a montmorillonite-graphene hybrid, a second dispersing agent and a nucleating agent; the carboxylated carbon nano tube is prepared by reacting a carbon nano tube with strong acid; the montmorillonite-graphene hybrid is prepared from montmorillonite and graphene oxide through a reaction. Melamine resin is modified by adopting lignosulfonate and modified nanocellulose whiskers, meanwhile, a reinforcing material is compounded, and the heat resistance and the mechanical property of the melamine resin are improved in combination with a gradient curing process.

The invention relates to the technical field of heavy metal remediation, in particular to a composite soil conditioner based on coal gangue and biomass and a method for remediating heavy metal contaminated soil through the composite soil conditioner. The soil conditioner specifically comprises the following components in parts by mass: 70-80 parts of coal gangue, 2-3 parts of calcium fluoride, 2-3 parts of lignosulfonate, 3-5 parts of an improved microbial agent, 4-6 parts of humic acid, 6-10 parts of straw charcoal, 3-5 parts of diatomite, 2-3 parts of hydroxyapatite and 5-10 parts of chitosan. The preparation method is simple in process and low in cost, and has relatively high popularization and application values. The stability and high efficiency of the product are ensured by optimizing the process parameters such as calcination temperature and microbial agent loading, and the ecological function of soil can be gradually recovered after long-term application. Compared with a traditional soil dressing method or a chemical leaching technology, the remediation cost is reduced, cyclic utilization of resources is achieved, and a sustainable solution is provided for treatment of the heavy metal contaminated soil.

The application discloses a saline-alkali soil improvement liquid fertilizer and a preparation method and application thereof, and relates to the technical field of liquid fertilizers.The saline-alkali soil improvement liquid fertilizer is prepared by taking acid pulping waste liquid rich in lignin sulfonate as a skeleton, taking fulvic acid and amino acid as functional monomers, preparing a terpolymer through a free radical graft copolymerization reaction, and then adding sodium sulfinate into the terpolymer to improve the content of sulfonic acid groups in the terpolymer.The liquid fertilizer has the structural improvement ability of lignin sulfonate, the buffer complexing ability of fulvic acid and the nutritional activity of amino acid, and can realize the synergistic improvement of saline-alkali soil from three dimensions of chemical alkali reduction, physical salt removal and structure improvement.

The application provides a high-stability lignosulfonate-containing aqueous dye inkjet ink and a preparation method thereof, and belongs to the technical field of inkjet inks; the application constructs a repairable dynamic network through synergistic action: anchor copolymer functionalizes the surfaces of particles such as mica by using dopamine units, and the main units provide diol reaction sites; the bridging copolymer connects the particles into a three-dimensional structure by forming reversible borate ester chemical bonds with the diol sites through boronic acid groups; the synergistic action of the two suspends the particles through a gel structure during standing, and ensures long-term storage stability; during printing, the network collapses under shear force, and the viscosity sharply decreases to ensure smooth jet flow; after printing, the network self-repairs, and the viscosity is recovered to control droplet spreading, and finally, the unity of high stability and high printing performance is achieved.

The invention relates to the field of pesticide preparations, and discloses a sterilization composition containing tetramycin and Saisentong as well as a preparation method and application of the sterilization composition. Tetramycin and Saisentong serve as active components of the composition, and a dual-structure composite lignin derivative system serves as a functional carrier; the system is composed of high-molecular-weight modified lignosulfonate and specific lignin phenol fragments with low polymerization degree. The high-molecular-weight component forms a physical barrier on the surfaces of active component particles, so that the storage stability and the application safety of the preparation are improved; the low-polymerization-degree component can be degraded by an extracellular enzyme secreted by citrus canker pathogen, so that the targeted release of the active component at the focus is realized. The composition disclosed by the invention effectively reduces the decomposition rate of the active components and the phytotoxicity risk to crops, and meanwhile, the field control effect on the citrus canker is remarkably improved. The composition provides an efficient and safe new choice with a targeting effect for chemical prevention and treatment of citrus canker.

The invention discloses a lignin-based porous adsorption material as well as a preparation method and application thereof, and belongs to the technical field of adsorption material preparation. The preparation method comprises the following steps: grinding and sieving a pore-foaming agent to obtain a pretreated pore-foaming agent; the preparation method comprises the following steps: uniformly mixing lignosulfonate, a pretreatment pore-foaming agent, a cross-linking agent, a catalyst and water, and carrying out a cross-linking reaction to obtain a cross-linked body; and cleaning, dehydrating and drying the cross-linked body to obtain the product. The invention further discloses the lignin-based porous adsorption material prepared by the method and application of the lignin-based porous adsorption material. Compared with a traditional chemical crosslinking curing adsorption material, the lignin-based porous adsorption material has higher specific surface area and functional group utilization rate; the used pore-foaming agent has good water solubility, does not participate in the reaction in the crosslinking process and can be removed to form pores after crosslinking, the porosity and the pore size of the product can be regulated and controlled by adjusting the dosage and the particle size of the pore-foaming agent, and the application prospect is wide.

The invention provides a self-assembled surfactant as well as preparation and application thereof. The preparation method comprises the following steps: adding an anionic surfactant and a nonionic surfactant into a buffer solution, uniformly mixing, and heating until the anionic surfactant and the nonionic surfactant are completely molten, so as to obtain the self-assembled surfactant. Wherein the anionic surfactant is one or more of lignosulfonate, secondary alkyl sulfonate and alpha-olefin sulfonate; the nonionic surfactant is one or more of polyethylene glycol, fatty alcohol-polyoxyethylene ether, polyoxyethylene alkyl ether and polyoxyethylene nonyl phenyl ether. The specific anionic surfactant and the nonionic surfactant are compounded, self-assembly is completed through heating, and the obtained self-assembly surfactant can remarkably improve the enzymolysis efficiency of lignocellulose.

The invention relates to a method of making an acoustic product and a novel acoustic product, wherein the acoustic product is made by adhering a facing to a first major surface of an acoustic insulation element by the use of an adhesive and curing the adhesive. The adhesive is an aqueous adhesive composition which is free of phenol and formaldehyde and comprises:a component (i) in form of one or more lignosulfonate lignins having a carboxylic acid group content of 0.03 to 2.0 mmol / g, such as 0.03 to 1.4 mmol / g, such as 0.075 to 2.0 mmol / g, such as 0.075 to 1.4 mmol / g, based on the dry weight of the lignosulfonate lignins,a component (ii) in form of one or more cross-linkers.

The application discloses a preparation method of modified lignin sulfonate asphalt emulsifier, and application of products and the asphalt emulsifier. The emulsifier is prepared by the following steps: reacting an amine compound with acrylic acid to generate an amide compound, and then reacting the amide compound with sodium lignin sulfonate and formaldehyde in a solvent to generate the emulsifier. The molar ratio of the amine compound to the acrylic acid is 1:1, the amount of the sodium lignin sulfonate is 40% to 60% of the total mass of the amine compound and the acrylic acid, the amount of the formaldehyde is 14% to 26% of the mass of the sodium lignin sulfonate, and the mass ratio of the solvent to the reactants is (1 to 1.2):(1 to 1.2). The preparation method of the modified lignin sulfonate asphalt emulsifier is simple, the production cost is low, the water solubility is good, the surface activity is strong, the modified lignin sulfonate asphalt emulsifier belongs to a slow cracking type asphalt emulsifier, the emulsified asphalt produced by using the modified lignin sulfonate asphalt emulsifier is fine and uniform, the storage stability is excellent, and the modified lignin sulfonate asphalt emulsifier has a good application prospect in asphalt pavement construction.

The invention discloses a lignin-based self-repairing binder as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. A preparation method of the lignin-based self-repairing binder comprises the following steps: mixing polyacrylic acid, lignosulfonate and a lithium lipoate-based material in a solution, and then carrying out heat treatment to obtain the lignin-based self-repairing binder, the lithium lipoic acid-based material is lithium lipoic acid or itaconic acid cross-linked lithium polylipoic acid. The binder obtained by the invention has a three-dimensional network structure, a lithiated lipoic acid chain segment is introduced into the binder, and lignosulfonate is used as a cross-linked network fulcrum, so that the binder has good adhesion. And lithium ions and polylipoic acid with a cross-linked structure are introduced, so that the cycle performance and the rate capability of the lithium ion battery under high current density are improved.

The present invention relates to a sports field comprising:(i) a lower base layer;(ii) an upper grass and / or artificial grass layer;(iii) a shock pad layer, positioned between the base layer and the grass or artificial grass layer;wherein the shock pad layer comprises at least one shock pad comprising a coherent plate having upper and lower major surfaces, wherein the coherent plate comprises at least one coherent layer comprising man-made vitreous fibres (MMVF) bonded with a cured aqueous binder composition free of phenol and formaldehyde; wherein the aqueous binder composition prior to curing comprises:a component (i) in form of one or more lignosulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g, based on the dry weight of the lignosulfonate lignins,a component (ii) in form of one or more cross-linkers.

The invention belongs to the technical field of building materials, and particularly relates to a waterborne epoxy resin-sulphoaluminate cement composite repairing material and a preparation method thereof. The water-borne epoxy resin-sulphoaluminate cement composite repairing material disclosed by the invention is prepared from the following components in parts by weight: 10 to 20 parts of water-borne epoxy resin, 40 to 60 parts of sulphoaluminate cement, 0.5 to 1 part of nano modified lignosulfonate, 0.2 to 0.6 part of nano hybrid polyvinyl alcohol, 0.1 to 0.5 part of a retarder, 0.05 to 0.3 part of an early strength agent and 12 to 25 parts of water. The water-borne epoxy resin-sulphoaluminate cement composite repairing material is suitable for hydraulic buildings with high requirements on repairing quality and durability, such as cross-sea bridges, seaport wharfs, hydropower stations and the like.