314 results about "Lignosulfonates" patented technology

The invention provides a boron nitride / epoxy resin heat-conducting composite material as well as a preparation method and application thereof. The boron nitride / epoxy resin heat-conducting composite material comprises the following raw material components: lignosulfonate; boron nitride; deionized water; a carboxymethyl nano cellulose solution; carboxylating the carbon nanotubes; borax; an epoxy resin; 1, 1, 2-cyclohexanedicarboxylic anhydride; the catalyst is 2, 2, 4, 6-tri (dimethylaminomethyl) phenol. The invention relates to a preparation method and application of a novel h-BN (boron nitride) composite material for thermal management, in particular to a three-dimensional vertical orientation composite material prepared by using lignosulfonate (LS) modified h-BN, cellulose nanofibers (C-CNF), carboxymethyl carbon nanotubes (C-CNT) and borax (B) as raw materials and adopting an ice template method. And the filler can be used as a novel enhanced heat conduction and electrical insulation filler in epoxy resin. According to the invention, BN is firstly modified, and surface modification is carried out on BN through sodium lignin sulfonate, so that compared with direct use of unmodified BN, the problem of poor compatibility and dispersibility of BN in the composite material is solved, and the heat-conducting property of the composite material is further improved.

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 microbial compound high-efficiency organic bacterial fertilizer which comprises the following raw materials: 10-20 parts of a microbial agent, 10-20 parts of humic acid, 3-10 parts of natural mineral powder, 1-7 parts of a plant extract, 2-4 parts of amino acid, 2-5 parts of a seaweed extract, 1-3 parts of chitosan, 3-7 parts of charcoal, 1-3 parts of chitin, 2-5 parts of potassium fulvate and 1-3 parts of lignosulfonate. The problems that existing organic bacterial manure is single in function, not remarkable in effect, high in preparation cost and the like are solved. The organic bacterial fertilizer has multiple functions of improving soil fertility, promoting crop growth, enhancing crop stress resistance and the like, and the preparation method is simple, easy to implement, low in cost and suitable for large-scale production.

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 provides a preparation method of solvent-free lignin modified waterborne polyurethane, which comprises the following steps: mixing isocyanate, polyol and lignosulfonate alcohol liquefied product, and reacting to obtain a prepolymer; and dispersing the prepolymer in water, and carrying out a post-chain extension reaction with a post-chain extender to obtain the solvent-free lignin modified waterborne polyurethane. The lignosulfonate alcohol liquefied product has high compatibility with polyhydric alcohols and isocyanate, so that the lignosulfonate alcohol liquefied product directly participates in a polymerization reaction without using a solvent to dissolve lignin in the later period, thereby improving the environmental protection property and reducing the cost. The degree of functionality of a lignin reactive group in the lignosulfonate alcohol liquefied product is greater than 2, and a waterborne polyurethane product is of a cross-linked structure after reaction, so that the mechanical properties and the like of the product are greatly improved, and the application in the fields of leather finishing and the like is further facilitated.

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 relates to the technical field of breathable adhesive tapes, in particular to a double-layer composite high-breathability low-sensitivity adhesive tape and a preparation method thereof. The adhesive tape comprises a hydrophobic surface layer material, a high-breathability low-sensitivity composite adhesive and release paper. The high-breathability and low-sensitivity adhesive tape comprises a three-dimensional net-shaped breathable layer and a low-sensitivity adhesive layer. The hydrophobic surface layer material adopts a polyvinylidene fluoride electrostatic spinning nanofiber membrane with high specific surface area and porosity, so that the hydrophobicity and the adhesion with the lower layer material are improved; according to the high-breathability and low-sensitivity adhesive tape, polycaprolactone, a polylactic acid-glycolic acid copolymer and polyurethane are copolymerized to obtain a multifunctional three-dimensional net-shaped breathable layer; the high-breathability and low-sensitivity composite adhesive tape is prepared from dopamine modified polydimethylsiloxane microfibers decorated by oxidized dextran modified vinyl siloxane tip fibers, and the adhesive force and biocompatibility of the adhesive tape and skins with different roughness degrees are enhanced. Meanwhile, the lignosulfonate surfactant is added, so that the reproduction of bacteria and fungi in an adhesive tape attachment area can be inhibited.

The invention provides a preparation method of a neutralizing corrosion inhibitor, which belongs to the technical field of metal corrosion inhibition, and comprises the following steps: uniformly mixing imidazoline quaternary ammonium salt and thiourea, reacting at high temperature, cooling, and recrystallizing to obtain thiourea-based imidazoline quaternary ammonium salt, namely a corrosion inhibition component; 4-pyridyl amidoxime, silane and distilled water are mixed and then heated and stirred, an isocyanate cross-linking agent, octadecylamine polyoxyethylene ether and ammonia water are added, stirring continues, and a neutralizing component is obtained; the neutralization corrosion inhibitor is obtained by uniformly stirring the corrosion inhibition component, the neutralization component, the lignosulfonate and the distilled water. According to the technical scheme provided by the invention, the problem that an existing neutralizing corrosion inhibitor easily generates crystalline salt in an acid environment to promote under-scale corrosion is solved, and the overall neutralizing corrosion inhibition capability is also improved.

The invention relates to the technical field of oilfield chemistry and high-temperature and high-salt oil reservoir profile control and water shutoff, in particular to a preparation method, a product and application of polymer gel particles with enhanced mechanical properties through a double-crosslinking domain structure. The preparation method comprises the following steps: dissolving a monomer, a cross-linking agent and an initiator in water, and carrying out free radical polymerization reaction to obtain polymer hydrogel; and drying the polymer hydrogel to obtain the polymer gel particles, the monomers comprise acrylamide, acrylic acid, N-(hydroxymethyl) acrylamide and 2-acrylamide-2-methylpropanesulfonic acid; the cross-linking agent comprises methacrylic acid esterified lignosulfonate and / or N, N '-methylene bisacrylamide. The preparation method disclosed by the invention is simple, and the polymer gel particles prepared by utilizing the method have a unique double-crosslinking domain structure, have excellent mechanical properties and excellent temperature resistance and salt tolerance, and are suitable for profile control and water shutoff of high-temperature and high-salt oil reservoirs.

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.

The invention discloses an improvement method of sludge soft soil layer shield muck, and belongs to the technical field of shield tunnel construction muck improvement. Metakaolin, blast furnace slag, lignosulfonate and nano silicon dioxide powder are mixed to prepare a mixed raw material, the mixed raw material is pumped into a muck bin, then an alkali-activated solution is pumped into the muck bin, and the mixed raw material is stirred to be uniform; and after mixing and stirring, adding anionic polyacrylamide powder and bentonite, and continuously stirring until a gel system is generated, thereby completing muck improvement. According to the invention, sodium hydroxide and sodium silicate are used as alkali-activated solutions to activate a gel system, blast furnace slag provides a large amount of silicon elements and aluminum elements, and metakaolin contains silicon, aluminum and calcium elements to improve the strength of the gel system; during use, the two raw materials are separated, so that the two raw materials are prevented from reacting in advance before reaching a muck bin to generate gel, and pipeline blockage is avoided; the anionic polyacrylamide and the bentonite are matched, so that the permeability is improved, the drainage of water is facilitated, and the occurrence of spewing is effectively prevented.

The invention provides a silicon-carbon negative electrode material and a preparation method and application thereof, and relates to the technical field of negative electrode materials. The preparation method of the silicon-carbon negative electrode material comprises the following steps: S1, uniformly mixing lignosulfonate and an alkaline solvent, drying, carbonizing, washing and drying to obtain a sulfur-doped porous carbon material; s2, performing silicon deposition reaction on the sulfur-doped porous carbon material to obtain a sulfur-doped porous silicon carbon precursor material; s3, a urea solution, formaldehyde and formic acid are added into the sulfur-doped porous silicon carbon precursor material, stirring, standing, acid soaking, washing, drying and carbonization are performed, and the sulfur-doped porous silicon carbon composite material is obtained. The silicon-carbon negative electrode material provided by the invention has excellent electrochemical performance.

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 modified struvite and a preparation method thereof, wherein the surface of the struvite is modified by lignin sulfonate, and at least 85% of the particle size distribution is between 1 and 10 μm. The slurry formed by the modified struvite and water has excellent film-forming properties, can more easily adhere to the surfaces of various substrates and oily leaves to form a dense and uniform fireproof coating, maximizes the contact area with the attached object, and improves the flame retardant effect of the struvite.

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 invention relates to the technical field of emulsified asphalt, and particularly discloses emulsified asphalt and a preparation method thereof. The emulsified asphalt is prepared from the following components in parts by weight: 1000 parts of water, 1 to 3 parts of soap, 0.5 to 1 part of caustic soda, 2 to 4 parts of glass water, 0.5 to 1.5 parts of washing powder, 2 to 3 parts of lignosulfonate, 1 to 2 parts of alkylphenol polyoxyethylene phosphate, 0.2 to 0.6 part of potassium hydroxide, 400 to 600 parts of asphalt, 0.4 to 0.8 part of organic silicon defoaming agent, 0.2 to 0.4 part of polyether modified silicone oil, 1 to 1.5 parts of sodium carboxymethyl cellulose and 0.5 to 1 part of lauryl sodium sulfate. According to the invention, the soap, the caustic soda and the washing powder with optimized dosages are adopted to construct composite emulsification, the effect of reducing the oil-water interfacial tension is far better than that of a traditional single formula, and meanwhile, the emulsified asphalt is flatly and uniformly spread on a construction surface, so that the construction efficiency is improved, and the construction quality is improved. The base layer can be tightly attached, holes and pitted surfaces are avoided, and the construction efficiency and quality are improved.

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 relates to the technical field of comprehensive development and utilization of lignosulfonate and development of novel anti-electromagnetic radiation materials, and discloses a preparation method and application of a biochar / CoFe2O4 dual-loss anti-electromagnetic radiation material. Firstly, iron ions and cobalt ions are adsorbed in a molecular structure of sodium lignosulfonate through electrostatic attraction; then, the biochar / CoFe2O4 composite material is prepared through a high-temperature carbonization treatment one-step method. The anti-electromagnetic radiation material prepared by the invention has both electrical loss and magnetic loss, and has better anti-electromagnetic radiation performance. Lignosulfonate used in the preparation method is low in price and easy to obtain, complex processes and use of a large amount of solvents are avoided in the material preparation process, and the method is economical and environmentally friendly.

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 discloses a preparation method of high-strength supramolecular lignin / polyvinyl alcohol hydrogel. The high-strength supramolecular lignin / polyvinyl alcohol hydrogel is prepared by gradually diffusing a lignosulfonate solution into a polyvinyl alcohol (PVA) solution and self-assembling. The supramolecular hydrogel prepared by the method disclosed by the invention has good mechanical properties, freezing resistance, ultraviolet resistance and the like, so that the supramolecular hydrogel has huge application potential in the fields of tissue engineering, rubber, plastic substitution, wearable electronics and the like.

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.