137 results about "Sodium Bentonite" patented technology

The invention relates to the field of civil engineering waterproof materials, in particular to a nano bentonite-polymer composite material with high salt tolerance and a preparation method thereof, and the nano bentonite-polymer composite material is especially suitable for a sodium-based bentonite waterproof blanket in a saline soil area or a marine environment, and the preparation method comprises the following steps: (1) preparing nano bentonite lamellar colloidal dispersion liquid; (2) introducing and mixing an electrostatic screening agent and a polymerizable monomer; (3) carrying out in-situ free radical polymerization reaction; and (4) post-treatment and finished product preparation. By constructing a three-dimensional interpenetrating hierarchical structure composed of a covalent grafted polymer network, a physically anchored electrostatic screening agent and a stripped bentonite nanosheet layer, effective protection of a bentonite core anti-seepage unit is realized, so that the adaptability and long-term stability of the material under a complex water quality condition are remarkably improved.

The invention provides a composition and application thereof in plant growth promotion, and the composition is granular and is prepared from corn glume, polyvinyl alcohol, sodium bentonite and water. The composition can be directly applied through a fertilizer throwing machine or applied together with a chemical fertilizer and an organic fertilizer, after application, the plant yield and quality can be improved, the lodging resistance of plants can be improved, the composition especially has a remarkable effect on increasing the yield of crops in arid regions, materials are easy to obtain, the price is low, pollution is avoided, and the composition has important significance on development of the planting industry in China.

The invention relates to bacteriostatic bentonite cat litter and a preparation method thereof, and belongs to the technical field of pet supplies. The bacteriostatic bentonite cat litter sequentially comprises a sodium bentonite matrix embedded with a bacteriostatic agent, a metal oxide layer and a biological membrane layer from inside to outside, the sodium bentonite matrix is obtained by mixing and aging bentonite and a sodium modifying agent in a solvent. When the biological membrane is in contact with excrement, the outer-layer biological membrane preferentially blocks liquid permeation, the middle-layer nano ZnO still generates active oxygen in a weak light environment, and the inner-layer Ag < + >-loaded zeolite slowly releases and inhibits bacteria, so that the antibacterial persistence can be improved. The bacteriostatic bentonite cat litter disclosed by the invention is remarkable in deodorization and antibacterial effects, does not stick to hands when being used, does not generate dust, and has relatively strong caking performance.

The invention relates to the technical field of bentonite preparation, in particular to organic modified bentonite and a preparation method thereof.The preparation method comprises the following steps that (a) natural bentonite is subjected to acidification whitening pretreatment through sulfuric acid; (b) sodium carbonate is subjected to sodium modification and transformation to obtain sodium bentonite; (c) dispersing sodium bentonite in absolute ethyl alcohol, adding 3-aminopropyltriethoxysilane (APTES) and polyethylene glycol diacrylate (PEGDA), and performing reflux reaction under the condition that the pH is 4.0 to realize silanization intercalation; (d) adding 5% of a template agent, and carrying out hydrothermal construction at 120 DEG C to form a mesoporous-macroporous hierarchical pore channel; and (e) eluting the template agent by using an ethanol / water mixed solvent, drying and crushing to obtain a finished product. According to the method, the defects that traditional bentonite is low in mass transfer efficiency and insufficient in macromolecule adsorption capacity are overcome, the adsorption capacity of organic pollutants can be improved by 40% or above, and meanwhile the structural stability in the high-temperature and acid environment is enhanced.

The invention provides a composition and application thereof in ecological restoration, and the composition is granular and is prepared from glume of corncob, polyvinyl alcohol, sodium bentonite and water. The composition can keep soil moisture and improve the soil structure, the raw materials are biomass materials, water retention is achieved, food sources can be provided for microorganisms and soil animals in soil, microcirculation of moisture and soil organisms is formed around the composition, the soil organisms can further increase nutrients in the soil, and the soil quality is improved. Soil carbon-solid continuous increase of soil organic matters and aggregates is realized, and the method has great significance on ecological restoration.

The application relates to the technical field of building materials, and discloses a permeable crystalline self-healing waterproof material for concrete self-waterproofing, which is prepared from the following raw materials in parts by weight: 20-30 parts of sodium-based bentonite, 20-50 parts of sodium methyl silicate, 4-6 parts of a penetrating agent, 8-12 parts of a sulphoaluminate cement, 15-18 parts of a silicone zirconium, and 2-5 parts of a complexing agent; the complexing agent is composed of 2-[3-(4-pentylphenyl)prop-2-enylamino]benzoic acid and sodium ethylenediaminetetraacetate. The above technical scheme solves the problem of low mechanical performance and waterproofness of concrete in the prior art.

The invention belongs to the technical field of oil field gas channeling plugging agents, and discloses a high-molecular pre-crosslinked gel particle plugging agent suitable for a carbon dioxide drive oil reservoir and a preparation method of the high-molecular pre-crosslinked gel particle plugging agent. The raw materials comprise an acrylamide monomer, sodium bentonite, an acrylic monomer, an acid-resistant functional monomer, a temperature-resistant and salt-resistant functional monomer, a first cross-linking agent, a second cross-linking agent, an initiator, an inorganic reinforcing agent, an antioxidant and water. The prepared acid-resistant gel particle is good in temperature resistance, salt resistance and acid resistance and long in effective period of action, the viscosity of a system is increased after the particle swells for a certain time, the plugging capacity is enhanced, and the acid-resistant gel particle can be used as an excellent CO2 drive reservoir gas channeling plugging agent and is used for plugging a heterogeneous formation with developed micro-cracks.

The invention discloses a green and environment-friendly superfine bentonite anticorrosive coating and a preparation process thereof. The anticorrosive paint is prepared from 40 to 70 parts of water-based film forming matter, 0.3 to 3.0 parts of composite bentonite, 1.0 to 8.0 parts of a green corrosion inhibition system, 2.0 to 12.0 parts of an auxiliary agent, 0.30 to 0.40 part of a surface modifier, 10 to 30 parts of deionized water and 0.5 to 5 parts of a cosolvent. The composite bentonite is prepared by compounding sodium bentonite, nano titanium dioxide and a natural antibacterial extract according to the mass ratio of 100: (3-5): (0.3-2.0); the green corrosion inhibition system is formed by compounding molybdate, an organic corrosion inhibitor and a silane co-condensation compound. The preparation process comprises four key steps of preparation of a composite bentonite suspension, surface functionalization treatment, gradient shearing dispersion and coating blending. The salt spray resistance of the anticorrosive paint can reach 1150 hours, the VOC content is as low as 35 g / L, the antibacterial rate of the natural antibacterial extract is 97.2%, and the anticorrosive paint has excellent anticorrosive performance and green and environment-friendly characteristics.

The invention provides an oxidation active zone remediation system and method for underground water organic pollution. The remediation system comprises a plurality of injection wells and monitoring wells which are arranged at the downstream of an underground water pollution plume; the injection wells are distributed in rows at equal intervals in the direction perpendicular to the underground water flow field, the adjacent injection wells in the same row are distributed at equal intervals, and the injection wells in the adjacent rows are distributed in a staggered mode. The monitoring wells are arranged at upstream and downstream positions of an oxidation active zone formed by the injection wells; the injection well is of a double-well structure and comprises an inner well and an outer well. The inner well and the outer well are slotted floral tubes, a repairing agent is injected into the inner well, and the space between the inner well and the outer well is filled with a slow-release repairing material; and the outer side of the outer well is provided with a well wall formed by filling quartz sand filter materials, sodium bentonite particles and anti-seepage cement paste from bottom to top. According to the remediation system, through the reasonable structural design and application of the remediation agent and the slow-release remediation material, an oxidation activity reaction zone can be rapidly established, underground water pollution diffusion is efficiently blocked, and rapid and effective remediation of underground water is achieved.

This invention provides a method for preparing modified bentonite, comprising: step S1, mixing bentonite, an intercalating agent, and water to obtain a mixed slurry, wherein the intercalating agent includes sodium hexafluorosilicate; step S2, freezing the mixed slurry to obtain a frozen mixed slurry; and step S3, thawing and drying the frozen mixed slurry to obtain modified bentonite. This invention uses sodium hexafluorosilicate as one of the intercalating agent components to modify bentonite, and through freezing and thawing steps, it prepares sodium-based bentonite while simultaneously increasing the interlayer spacing and improving its impermeability.

The invention discloses sealing cement for a sliding nozzle and a preparation method of the sealing cement. The formula of the sealing cement for the sliding nozzle is composed of 35-45 parts of blast furnace slag powder, 15-25 parts of calcareous quicklime fine powder, 30-40 parts of graded quartz mortar aggregate, 8-12 parts of a pre-activated composite activator, 5-10 parts of a sodium silicate-based rapid hardening adjusting liquid, 0.5-2 parts of plasticized water-retaining fibers and 0.1-0.3 part of an aluminum powder antioxidant. The pre-activated composite exciting agent is formed by blending sodium bentonite and anhydrous potassium carbonate according to a mass ratio of 7: 3 by a dry method; according to the invention, the pre-activated composite activator is cooperated with the modified slag, the daub forms a compact reaction interface in a plastic stage, and the defect of reaction lag of a traditional slag-lime system is overcome; from initial setting and hardening to high-temperature service, the system always keeps dynamic fit with the sliding nozzle: in the initial setting stage, oligomeric silicate rapidly permeates into a slag interface to generate a rigid gel skeleton, so that rapid structure locking is realized, and the waiting time for nozzle installation is greatly shortened.

The invention relates to a salt core production method, which comprises: stirring industrial salt, sodium bentonite, sodium water glass and absolute ethyl alcohol, taking out, placing into a drying furnace, carrying out thermal insulation, cooling, crushing, and screening with a screen; pouring the mixed salt into a lower mold cavity of the mold, pressing by an upper mold, lifting the upper mold, and ejecting the green body by a lower mold core; the green body is put into a sintering furnace for heat preservation, and then the cooked body is taken out for cooling; turning the cooked blank by using a forming cutter, and drilling after turning is completed; putting the salt core into a sintering furnace for heat preservation and then taking out; and packaging and storing the qualified products in a sealing bag. The method has the beneficial effects of low cost, simple and stable process, high product percent of pass and the like. Compared with a pure salt core, the salt core has the advantages of higher strength, better processability, fewer appearance defects and higher rate of finished products. The raw materials are simple, the product processability is better, and meanwhile the requirements for water solubility and low gas forming amount of aluminum alloy castings are met.

This invention belongs to the field of sodium-based bentonite technology, specifically relating to a method for producing sodium-based bentonite from calcium-based bentonite, comprising the following steps: S1. Preliminary mixing: crushing calcium-based bentonite to 90-110 mesh, and then mixing it with a composite sodium-forming agent at a mass ratio of 1:(0.03~0.10); S2. Mechanical shearing: processing the mixture obtained in step S1 in a high-speed shearing machine at a speed of 2000~4000 r / min for 10~40 min; S3. Sodium formation: adding 1~1.5 times its mass of deionized water to the bentonite after mechanical shearing in step S2, and stirring and reacting at a temperature of 60~80℃ for 1~2 h; S4. Drying: centrifuging and dehydrating the sodium-formed bentonite in step S3, drying it at 120~150℃, and pulverizing it to 200~300 mesh to obtain the product. The present invention provides a method for producing sodium-based bentonite from calcium-based bentonite. The preparation method is simple, with high sodiumization efficiency and short reaction time. For the first time, rare earth catalysis, nano-intercalation and bio-based additives are combined, breaking through the traditional sodiumization theoretical framework. The prepared product has good performance, high expansion capacity, and meets the standards of high-end foundry bentonite, making it suitable for high-end application scenarios.

The invention discloses a pectin / titanium pillared bentonite composite adsorption material and a preparation method thereof, and belongs to the technical field of wastewater treatment. According to the method, sodium bentonite is used as a matrix, tetrabutyl titanate is used as a titanium source, titanium pillared bentonite is prepared through a sol-gel method, then the titanium pillared bentonite is compounded with a pectin solution, and the pectin / titanium pillared bentonite composite adsorption material is prepared. The problems that natural bentonite swells when encountering water and solid-liquid separation is difficult are solved through titanium pillared modification, and the specific surface area of the bentonite is increased from 21.22 m < 2 > / g to 116.23 m < 2 > / g; the material is endowed with excellent heavy metal complexation and flocculation performance through pectin compounding, the maximum adsorption capacity of the prepared pectin / titanium pillared bentonite composite adsorption material to Hg (II) reaches 31.40 mg / g, the flocculation settling time is shortened by 90% or above compared with natural bentonite, and the material has photocatalytic reduction performance. The invention has the advantages of wide raw material source, simple preparation process, low cost and no secondary pollution, and has wide application prospect in the field of heavy metal wastewater treatment.

The invention discloses a high-speed railway subsea tunnel corrosion-resistant grouting material and a preparation method thereof, and relates to the field of subsea shield tunnel grouting materials, the grouting material comprises a liquid A and a liquid B. The liquid A comprises, by weight, 30-45 parts of cement, 15-25 parts of superfine mineral powder, 5-10 parts of sodium bentonite and 2-5 parts of nano silicon dioxide; 0.05-0.1 part of a foam stabilizer, 5-12 parts of an inhibitor, 1-3 parts of SAP resin particles and 1-3 parts of polypropylene fibers; the liquid B is prepared from the following components in parts by weight: 40 to 60 parts of water glass, 20 to 30 parts of aluminum sulfate, 1 to 3 parts of early strength agent, 5 to 10 parts of conditioning agent and 10 to 16 parts of acrylate-polyurethane composite emulsion. The anti-permeability grade of the anti-corrosion grouting material is larger than or equal to P12, the strength retention rate in a high-concentration chlorine salt and sulfate seawater environment is larger than or equal to 90%, and the durability is remarkably improved.

The invention discloses a preparation method of a negative carbon modified clay-based salt-tolerant anti-seepage material, which comprises the following steps: grinding natural bentonite, washing with water to remove coarse particles, adding into a NaCl solution for sodium treatment, washing, and drying to obtain sodium bentonite powder; dispersing the obtained sodium bentonite powder in deionized water, carrying out shearing dispersion to realize lamella stripping, and carrying out centrifugal treatment to remove undispersed large particles so as to obtain highly dispersed nanosheet liquid; dissolving organic amine in the nanosheet liquid, adjusting the pH value to 8.5-9.0, heating to 60-80 DEG C, carrying out intercalation reaction for 4-24 hours, washing, and drying to obtain organic amine modified bentonite; the organic amine modified bentonite is mixed with water to obtain wet soil, the wet soil is placed in a fixed bed adsorber, CO2 gas is introduced, and the organic amine modified bentonite fully adsorbs CO2; and carrying out compression molding on the modified bentonite after adsorbing CO2 according to a set compaction degree to obtain the negative carbon modified clay-based salt-tolerant anti-seepage material.

This invention relates to the field of casting technology, specifically to a process for preparing easily collapsible clay sand and low-alloy steel bucket tooth shell molds using waste sand as raw material. The process is characterized by a formula comprising the following parts by weight: 90-110 parts recycled waste sand, 1-6 parts binder, 2-12 parts collapsing liquid, 0.2-2 parts thermal conductive agent, and 2-6 parts water. The binder is sodium-based bentonite, the collapsing liquid is a CH28 type aqueous solution, and the thermal conductive agent is magnesium peroxide. This invention is environmentally friendly, activating the effective binding capacity of bentonite, thus reducing the amount of bentonite added by 50%, while achieving 100% complete collapsibility of the low-alloy steel bucket tooth shell mold. It exhibits excellent collapsibility performance and achieves 95% recycling of waste sand, significantly reducing solid waste emissions and new sand consumption, saving new sand costs, and making a significant contribution to environmental and resource protection.

The utility model relates to the field of ecological restoration blankets, in particular to an integrated nutrient vegetation blanket device which comprises a blanket body, the blanket body comprises a hemp net layer, a mixed seed belt layer, a fiber material layer, a nutrient medium layer, a natural sodium bentonite layer and a filament machine-made geotextile layer, the hemp net layer is an upper layer and used for resisting external erosion, and the mixed seed belt layer is a lower layer and used for resisting external erosion. The mixed seed zone layer is the second layer, the mixed seed zone layer is provided with indigenous vegetation seeds, the limiting material layer is the third layer, through the synergistic effect of the materials of all the layers, comprehensive optimization of the vegetation growth environment is achieved, the vegetation recovery efficiency and success rate are improved, and the method has good application prospects in the fields of urban landscaping, barren mountain treatment, ecological restoration and the like. The device can exert excellent effects, the hemp net layer serves as the upper layer, good air permeability is guaranteed, external erosion such as wind and rain is effectively resisted, and a stable protection environment is provided for vegetation growth.

The present application relates to a kind of halogen-free flame-retardant polypropylene composite material and its preparation method, belong to polymer material technical field.The halogen-free flame-retardant polypropylene composite material of the present application includes the following mass fraction of each component: polypropylene 45~60 parts, flame retardant 15~25 parts, vinyl trialkoxysilane 1~3 parts, toughening agent 3~9 parts, antioxidant 0.05~1.5 parts.The present application uses the addition reaction of the vinyl group in end-vinyl borosilicon compound and the mercapto group in sodium bentonite modified by mercapto, borosilicon compound is grafted to sodium bentonite by C-S chemical bond, forms composite flame retardant, and the flame retardant does not contain halogen element, and simultaneously contains boron element, silicon element and sodium bentonite with good heat resistance, the synergistic effect of the multiple metal elements and silicon elements in sodium bentonite and the boron element, silicon element in organic matter is generated, and the flame-retardant performance of flame retardant is improved.

The application relates to the technical field of cat litter preparation, and discloses a mixed cat litter with antibacterial and color indicating functions and a preparation method thereof. The components of the mixed cat litter are mixed anthocyanins, sodium bentonite, taros, and honeysuckle in a mass ratio of 0.5-1.5:4:4:0.5-1.5. The mixed anthocyanins are a mixture of black carrot anthocyanins and camphor tree fruit anthocyanins in a mass ratio of 1:1. The cat litter prepared by the application has the functions of indicating the PH of cat urine, strong antibacterial function and strong color indicating function.

The present invention provides a method for landfilling coal gangue in goaf areas. The method comprises mixing a first coal gangue, a second coal gangue, a first portion of fly ash, sodium polyacrylate, sodium bentonite, and water to obtain a bottom landfill anti-permeability layer; filling the surface with a fourth coal gangue, mixing aeolian sand, a second portion of fly ash, a third coal gangue, sodium bentonite, and water to obtain a coal gangue gel, which is injected into the voids of the fourth coal gangue to obtain a coal gangue filling layer; covering the coal gangue filling layer with solid waste residue and / or sludge to obtain a compacted layer; alternating the coal gangue filling layer and the compacted layer until the goaf is filled; and finally, placing a soil cover layer. The present invention adopts a multi-layer alternating landfill method, using graded coal gangue as the main material for the anti-permeability layer. No calcination or other treatment is required, and the heavy metal pollution problem can be solved while reducing landfill costs. The coal gangue gel can further adsorb heavy metals while being flame retardant and improving the mechanical strength of the landfill body.

The application relates to the technical field of waterproof materials, in particular to an organic-inorganic composite waterproof material, a preparation method and application, which comprises the following steps: weighing raw materials according to weight parts; first, weighing A-component raw materials: water glass 5-10 parts, calcium oxide 4-7 parts, modified superfine fly ash 6-10 parts, sodium-based bentonite 5-8 parts, silicate cement 35-40 parts and water 25-30 parts; the organic-inorganic composite waterproof material of the application is mixed and optimized by A-component raw materials and B-component raw materials, and the A-component raw materials are mixed and optimized by the water glass, the calcium oxide, the sodium-based bentonite and the silicate cement, and the modified superfine fly ash is further mixed and optimized; the product has excellent balance and coordination of coagulation rate, mechanical strength and waterproof and anti-permeability, and the product has remarkable acid and alkali stability.

The invention particularly discloses a method for increasing the aluminum-silicon ratio through coal gangue anoxic roasting and application of the method, and relates to the technical field of solid waste resource utilization, and the method comprises the steps that coal gangue with the initial aluminum-silicon ratio being 0.8-1.0 is crushed; an assistant A and an assistant B are added into the coal gangue, and the assistant A is prepared by mixing vermiculite powder and a cetyltrimethylammonium bromide solution, performing ultrasonic treatment for 30 minutes, and then compounding and calcining with sodium bentonite; the assistant B is prepared by mixing a borax solution and a cerous nitrate solution, evaporating and crystallizing, drying and grinding; a double-helix conical mixer is adopted for mixing, and 0.5% of deionized water is sprayed; sealing the mixture, introducing nitrogen, and maintaining the residual oxygen content lt; the invention discloses an aluminum-rich material with the aluminum-silicon ratio of 3-5.5, the method comprises the following steps of: heating coal gangue to 400 DEG C at the temperature of 2% under normal pressure, preserving heat, roasting at the speed of 8 DEG C / min, cooling to 200 DEG C, performing coarse crushing and alkali dissolution, filtering, washing, drying and micronizing by jet milling to obtain the aluminum-rich material with the aluminum-silicon ratio of 3-5.5, the method can also be applied to preparation of mullite bricks, 4A molecular sieves and porous ceramic filter materials, the process is simple, the cost is low, and high-valued utilization of the coal gangue is realized.

The invention relates to a directional grouting method and system based on ionic electromigration response. The method comprises the following steps: preparing ion modified slurry containing an electric ionic surfactant; constructing a geoelectric field in the stratum target area; the ion modified slurry is injected into a stratum target area at preset pressure, charged ions in the ion modified slurry are directionally migrated in the potential gradient direction under the action of a ground electric field, and then the slurry is driven to integrally and precisely move towards the preset target area. The technical limitation that the diffusion direction of traditional grouting in a complex stratum is uncontrollable is broken through, centimeter-level directional migration of the slurry in an underground space is achieved, and meanwhile the sodium bentonite component in the system maintains the dispersion stability of the slurry through the physical-chemical synergistic effect; the coupling effect of an ion channel formed by the layered silicate structure and an electric field synergistically strengthens the electroosmosis migration power, so that the dual technical breakthrough of slurry directionality and stability is achieved.

An absorbent composition includes composite granules formed from at least diatomaceous earth and sodium bentonite. The diatomaceous earth can include greater than 50 weight % of the composition, based on the total weight of the composition, and a weight ratio of the diatomaceous earth to the sodium bentonite can be within a range of from 51:49 to 95:5. The individual particles of diatomaceous earth composed of the composite granules have a d90 particle size of 500 μm or smaller and the individual particles of sodium bentonite composed of the composite granules have a d90 particle size of 250 μm or smaller.

The invention belongs to the technical field of shield under-pressure bin opening, and particularly provides a composite clay mixed solution and application thereof, and the composite clay mixed solution is prepared from bentonite slurry, methyl cellulose and slaked lime; the bentonite slurry is obtained by mixing a bentonite solution and a sodium silicate solution, and the bentonite solution is obtained by mixing water and sodium bentonite. According to the composite clay mixed solution provided by the invention, methyl cellulose and slaked lime are introduced to synergistically enhance a system; specifically, methyl cellulose (MC) is used as a non-ionic thickening agent, and methoxyl (-OCH3) on a molecular chain of the methyl cellulose (MC) improves the consistency of a system through hydrogen-bond interaction. MC with the viscosity of 4000 mPa.s is selected in an experiment, and the addition amount of the MC is 0.3%-0.5% of the mass of the bentonite; the slaked lime and SiO2 in the bentonite are subjected to a pozzolanic reaction, and the shear strength of the system can be increased to 2.8 kPa within 6 h through the reaction.

The application relates to a preparation method of a building composite heat storage material and belongs to the technical field of heat storage materials. The method comprises the following processes: after mullite powder is subjected to heat treatment, the mullite powder is fully stirred and uniformly mixed with beeswax and coconut oil to obtain mullite powder uniformly loaded with beeswax, then the mullite powder is mixed and stirred with silk protein modified expanded graphite, a dispersing agent and water to obtain a suspension, the suspension is subjected to spray drying to obtain a first mixture which is uniformly mixed; sodium bentonite, inorganic salt modified silicon carbide and a binder are continuously added and uniformly mixed, extrusion molding is carried out, heat preservation is carried out in a reducing atmosphere, and natural cooling is carried out to room temperature, so that the building composite heat storage material is prepared. The prepared composite heat storage material has excellent heat storage performance, can maintain good stability, and can long-term play a heat storage effect.

The present application relates to the technical field of lubricating oil, and particularly relates to a high-temperature corrosion resistant lubricating oil and a preparation method thereof.The raw materials of the high-temperature corrosion resistant lubricating oil include, by mass fraction, base oil 130-190 parts, extreme pressure anti-wear agent 1-5 parts, amino-modified graphene 1-5 parts, antirust agent 0.1-1 part, antioxidant 1-3 parts, defoaming agent 0.1-1 part, trioctyl trimellitate 5-15 parts, sodium lignosulfonate 1-5 parts, and sodium bentonite 1-5 parts.The high-temperature corrosion resistant lubricating oil can not only meet the use requirements of bearings under the working conditions of high speed, high temperature and heavy load, effectively improve the anti-wear and friction-reducing properties of the lubricating oil under high temperature, but also has a simple preparation method and is suitable for large-scale popularization and application.

This invention relates to the field of bentonite waterproofing blanket technology, specifically a sodium-based bentonite waterproofing blanket with anti-wrinkle design. The blanket includes a main body with an integrated anti-wrinkle structure at its joint end, comprising: a tenon-and-mortise positioning strip, a tension-distributed reinforcing bar, a limiting frame, an anti-warping edge, and a buffer transition layer. By providing this integrated anti-wrinkle structure at the joint end of the main body, the tenon-and-mortise positioning strip enables interlocking and positioning constraints between adjacent waterproofing blankets. The tension-distributed reinforcing bar balances the multi-directional tension during the laying process, while the limiting frame restricts the displacement and scattering of sodium-based bentonite at the joint. Combined with the anti-warping edge on the outer side of the joint end to constrain edge deformation, and the buffer transition layer to coordinate the stress at the connection points of each component, the functional structures work together to constrain the displacement and deformation of the joint area of ​​the waterproofing blanket.

This invention belongs to the field of building materials technology, specifically relating to a double-walled microcapsule for cement-based materials, its preparation method, and its application. The double-walled microcapsule for cement-based materials of this invention comprises: a core, the core comprising the following components: hydrated aluminum sulfate, sodium bentonite, and a calcium oxide-based expanding agent; a first wall, the first wall comprising the following components: water glass, metakaolin, and water; and a second wall, the second wall comprising the following components: calcium carbonate; the first wall is disposed between the core and the second wall. The double-walled microcapsule for cement-based materials of this invention exhibits good interfacial compatibility with cement-based materials, enabling efficient repair of cracks.