81 results about "Halloysite" patented technology

The present invention belongs to the technical field of enameled copper flat wires, and relates to a direct-weldable polyurethane enameled copper flat wire and a preparation process therefor. In the present invention, by means of adding a rare-earth element, halloysite nanotubes, silicon carbide and graphene, a polyurethane paint in an intermediate layer is modified, and the performance of the polyurethane paint in the intermediate layer is thus effectively improved. By means of adding the rare-earth element, grains of the polyurethane paint can be refined, such that the polyurethane paint can be better coated on a copper flat wire; adding the halloysite nanotubes enables a polymer to form a network structure, such that the polyurethane paint has better mechanical strength; and adding silicon carbide and graphene further improves the mechanical strength of the polyurethane paint, also enhances the barrier properties of the polyurethane paint, and reduces the permeation of external substances, such as moisture and oxygen, to the polyurethane paint, thereby contributing to improving the oxidation resistance of the polyurethane paint.

The invention discloses a composite degradation accelerant, a controllable degradation polyester composite material and a preparation method of the controllable degradation polyester composite material. According to the invention, the halloysite-loaded degradation accelerant is used for coating the degradation bacterium spores to form a core-shell structure, so that the composite degradation accelerant is obtained, the thermal stability of the degradation bacterium spores is improved, and the degradation bacterium spores can be subjected to thermal processing with biodegradable polyester; through the synergistic effect of the composite degradation accelerant and the degrading bacteria, the biodegradation rate of the biodegradable material is regulated and controlled; the composite degradation accelerant and biodegradable polyester are blended and compounded, and the degradation rate is regulated and controlled through the design of the load rate and the raw material ratio, so that the problem of poor controllability of the degradation rate of the existing biodegradable material is solved; the production process is simple, and the existing biodegradable polyester modification production line is adopted, so that large-scale industrial production can be realized.

The invention relates to the technical field of waterproof coatings, and discloses modified halloysite and a preparation method thereof, a composition for a non-curing waterproof coating, the non-curing waterproof coating and a preparation method and application of the non-curing waterproof coating. The method for preparing the modified halloysite comprises the following steps: (1) carrying out first mixing on sunflower seed meal and an ethanol solution to obtain extract liquor; the mass concentration of the ethanol solution is 40-60%; (2) carrying out second mixing on a raw material halloysite nanotube and the extract liquor to obtain the modified halloysite, in the step (1), the mass ratio of the sunflower seed meal to the ethanol solution is 1: (5-19); in the step (2), the use amount mass ratio of the raw material halloysite nanotube to the extract liquor is 1: (1.5-2.5). The non-curing waterproof coating prepared from the modified halloysite provided by the invention has good antibacterial and mildew-proof properties.

This invention relates to the field of composite current collector base film materials, and discloses a heat-resistant and aging-resistant composite current collector base film and its preparation process. It is prepared by melt extrusion and stretching of the following raw materials in parts by weight: 100 parts PET resin, 12-25 parts multi-component composite reinforcing filler, and 0.5-3 parts lubricant. The multi-component composite reinforcing filler is prepared through the following steps: S1, halloysite nanotubes are composited with aminated mesoporous alumina, modified, and then loaded with an antioxidant to obtain functionalized halloysite nanotube-alumina composite particles; S2, magnesium oxide is deposited on graphene oxide, and modified to obtain a modified graphene oxide-magnesium oxide composite; S3, after blending, polymer grafting is performed to obtain the multi-component composite reinforcing filler. This invention, through the multi-component composite reinforcing filler in PET resin, can comprehensively improve the heat resistance, aging resistance, and bonding strength between the base film and the metal layer of the PET resin-based composite current collector base film.

The invention provides a wear-resistant anti-aging waterproof tarpaulin and a preparation method thereof, and belongs to the technical field of tarpaulin. The wear-resistant anti-aging waterproof tarpaulin comprises a base cloth layer and a PVC (polyvinyl chloride) coating coated on the base cloth layer, wherein the PVC coating is prepared from the following raw materials: 70 to 90 parts of PVC paste resin, 5 to 15 parts of a composite plasticizer, 10 to 30 parts of TiO2-HNTs powder, 3 to 5 parts of chlorinated paraffin, 8 to 12 parts of an additive and 80 to 100 parts of a solvent. The titanium dioxide and the halloysite nanotubes are compounded, the titanium dioxide is loaded on the halloysite nanotubes, agglomeration of the titanium dioxide is prevented, and the mechanical property and wear resistance of the tarpaulin can be effectively enhanced by adding the halloysite nanotubes.

This invention discloses a slow-release fertilizer suitable for lateritic soils in Hainan, comprising a fertilizer core and a coating layer; the fertilizer core comprises the following raw materials in parts by weight: 10-20 parts isobutylene diurea, 1-3 parts 3,4-dimethyl-1H-pyrazole dihydrogen phosphate, 1-3 parts dicyandiamide DCD, 20-30 parts humic acid, and 30-50 parts organic fertilizer; the coating layer comprises the following raw materials in parts by weight: 5-10 parts natural nanotube halloysite, 3-5 parts bentonite, 5-10 parts cyclodextrin, 1-3 parts polyglutamic acid, 1-3 parts wood vinegar, and 5-10 parts polyacrylamide. The isobutylene diurea, humic acid, and organic fertilizer of this invention can effectively replenish organic matter and nitrogen in iron-aluminate soil, maintain soil nitrogen levels, and effectively control the conversion of ammonium nitrogen to nitrate nitrogen in lateritic soil, thereby reducing nitrogen loss and achieving a stable supply of nitrogen. In addition, polyglutamic acid and polyacrylamide have strong water retention capacity, and the fertilizer core is coated with a coating layer to achieve slow release and water retention.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

The application discloses a kind of gel electrolyte and preparation method, application thereof.The preparation method of the gel electrolyte includes the following steps: S1: halloysite nanotube HNTs, polyvinylidene fluoride PVDF or polyvinylidene fluoride-hexafluoropropylene PVDF-HFP, N-methylpyrrolidone NMP mixed solution is coated on matrix, and film precursor is prepared;In mixed solution, the content of HNTs is 1~9%;PVDF or PVDF-HFP content is 9~10%;S2: the matrix coated with film precursor is cooled from bottom, then is removed to coagulation bath, and PVDF@HNTs composite film or PVDF-HFP@HNTs composite film can be prepared;The cooling condition is to be cooled to-80~60℃ in 5s;S3: PVDF@HNTs composite film or PVDF-HFP@HNTs composite film is immersed in electrolyte, and drying can be carried out.The gel electrolyte provided by the application presents honeycomb structure, and it has the effects of high stability, excellent mechanical properties and electrochemical properties.

The application relates to the technical field of composite phase change materials, and discloses a halloysite / carbon black aerogel encapsulated paraffin composite phase change material as well as a preparation method and application thereof. Sodium alginate is dissolved in deionized water, halloysite nanotubes and carbon black are added after stirring and dissolving, pyrrole is added after uniform mixing, and stirring is conducted; then, an initiator is added to initiate polymerization to form a hydrogel; the obtained hydrogel is directionally frozen by liquid nitrogen and then freeze-dried to obtain HCSA aerogel; the HCSA aerogel is immersed in molten paraffin to encapsulate paraffin, and the halloysite / carbon black aerogel encapsulated paraffin composite phase change material is obtained. The HCSA aerogel forms a stable three-dimensional porous structure by virtue of multi-component synergistic effect, the compressive strength is significantly improved, and the encapsulation rate of the PW is significantly improved; the PW@HCSA has excellent shape stability and thermal stability, and meets the long-term use requirement of thermal energy storage.

The application discloses a kind of iron phosphate material and its preparation method, belong to material technical field.The method is still based on high cost-effective hydrothermal system, in the case of conventional introduction each raw material, with urea intercalation halloysite nanotube as additive mixture, the substance can slowly release urea to maintain the stable balance of system pH during hydrothermal process, and the urea stability in intercalation is improved at high temperature, it will not be rapidly decomposed in the initial stage of reaction because of the high temperature and high pressure of hydrothermal system, finally prepared iron phosphate material has ideal structure morphology, and the lithium iron phosphate positive electrode material prepared by using the iron phosphate precursor obtained by the method has excellent electrochemical performance.

This invention relates to the field of oil well cementing technology, and discloses a slow-release nano-early strength agent, its preparation method, and cement slurry. The slow-release nano-early strength agent includes a carrier and an early strength agent loaded on the carrier. The carrier comprises halloysite nanotubes, and the early strength agent comprises one or more of chloride, sulfate, nitrate, and organic compounds. The weight ratio of the early strength agent to the carrier is (5-30):100. This invention utilizes the unique cavity structure of halloysite nanotubes and the strong interfacial interaction with cement to synthesize a slow-release nano-early strength agent, thereby improving the early strength of cement and extending the cement thickening time.

The invention discloses a high-flame-retardant and high-flexibility composite material for a cable and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material is composed of methyl vinyl silicone rubber, a hydrogenated styrene-butadiene block copolymer, polyether modified silicone oil, a phosphorus-containing flame retardant, a special flame-retardant synergist and auxiliaries such as a vulcanizing agent, a release agent and an antioxidant. Wherein the flame-retardant synergist is prepared by reacting a zinc ion loaded aminated halloysite nanotube with a phosphorus-nitrogen prepolymer, and has synergistic flame-retardant and enhancing effects. The composite material provided by the invention has a vertical combustion grade of UL94 V-0, an oxygen index of 36.8%-39.3%, a Shore A hardness of 40-45 and an elongation at break of 276%-296%, has excellent flame retardance, flexibility, smoke suppression and mechanical stability, is suitable for insulation and sheaths of cables in the fields of new energy, rail transit, aerospace and the like, and has wide application prospects. The technical problem that flame retardance and flexibility of a traditional material are difficult to consider at the same time is solved.

An additive composition comprising activated kaolinite and up to about 5 wt% halloysite based on the weight of kaolinite and halloysite is disclosed. Also disclosed is a method of regulating a rheological property of a cementitious composition.

The invention belongs to the technical field of porous ceramics, and relates to aluminum oxide porous ceramics for membrane separation and a preparation method and application thereof.The preparation method of the aluminum oxide porous ceramics comprises the following steps that porous alpha-aluminum oxide powder, halloysite nanotubes and a binding agent are mixed according to the proportion; adding water to prepare uniformly mixed pug or slurry; forming a green body from the pug or slurry in an extrusion molding, compression molding or tape casting manner; drying the green body at room temperature to 120 DEG C until the moisture content of the green body is less than or equal to 1wt% to obtain a dried green body; and heating the dried green body to 1300-1600 DEG C from room temperature in an air atmosphere at a heating rate of 1-5 DEG C / min, and keeping the temperature for 1-4 hours to obtain the aluminum oxide porous ceramic. The alumina porous ceramic prepared by the invention has high porosity, high mechanical strength and excellent pure water flux.

This invention is directed to transition metal-based-halloysite nanocomposites and methods of making and using the same.

The present application relates to modified halloysite nanotubes configured for chemisorption of volatile organic compounds with high efficiency and / or have high formaldehyde retention capacity by comprising one or more functional groups selected from amines (in other words, amino-), hydrazides, and acylhydrazides, as well as to the production methods and use thereof.

The application relates to the technical field of water treatment, in particular to an iron-based photocatalytic composite membrane and a preparation method thereof. co AA co VI) copolymer and polyvinylidene fluoride are mixed uniformly in an organic solvent, defoamed, prepared into a porous membrane through a phase inversion method, then coordinated in an acidic aqueous solution of iron ions, and hydrothermally converted to obtain the iron-based photocatalytic composite membrane. The iron-based photocatalytic composite membrane has the beneficial effects that PVDF is used as a film-forming matrix, polymers are used as ligands, nano-iron oxides are generated in situ through hydrothermal reaction, iron ions are uniformly anchored, the introduction of g-C3N4 expands the visible light response, a heterojunction is formed with the iron oxides, the photocatalytic efficiency is improved, halloysite provides adsorption enrichment, cooperates with photocatalysis, the treatment efficiency is improved, the composite membrane has good stability, is convenient to recycle and reuse, and has a long service life.

The invention relates to the technical field of water treatment adsorption, in particular to a composite adsorbent for treating nickel-containing electroplating wastewater and a preparation process of the composite adsorbent. The problem that the removal efficiency is low due to the fact that an existing treatment agent is interfered in the nickel removal process is solved. Magnetic halloysite is used as a rigid framework, chitosan and polyethyleneimine are used as auxiliary materials, and after in-situ crosslinking, thiourea groups are chemically grafted to prepare the adsorbent. The three-dimensional synergy of the halloysite nano-channel and the sulfur-nitrogen double-coordination group overcomes the technical bottlenecks of difficult complex breaking and poor competitive adsorption selectivity of strong complex nickel. The obtained adsorbent has excellent complex nickel deep removal rate and calcium and magnesium interference resistance, and high mechanical strength and rapid magnetic separation are realized by virtue of a rigid-flexible microstructure. The material has the advantages of high regeneration cycle efficiency and controllable preparation process, and is especially suitable for deep purification and resource recovery of electroplating wastewater.

The present application relates to the field of molecular sieve preparation, discloses a kind of molecular sieve matrix pellet strength improver and its preparation method and application and the preparation method of molecular sieve matrix pellet, the preparation method of molecular sieve matrix pellet strength improver includes: 1) clay mineral aggregate is mixed with sodium source, and clay base material is obtained;2) after being pulverized treatment, clay base material is calcined with hole expansion aid;Wherein, the clay mineral aggregate is the mixture of halloysite, kaolinite and montmorillonite, the water content of the clay mineral aggregate is 20-40wt%, the Fe2O3 content in the clay mineral aggregate is 0.01-0.1wt%, in the mixture of the clay mineral aggregate and the hole expansion aid, the particle size of 300-600 mesh accounts for more than 98%, and the sodium source is Na2O.The strength improver prepared by the method has high viscosity and hygroscopicity, and good plasticity.

This invention discloses a nano-haloysite-based electrolyte filling material and its preparation and application methods. The preparation method includes: mixing and grinding nano-haloysite with graphite; mixing the resulting halloysite-graphite mixture with saturated saline solution and polyacrylamide at low and high speeds, adjusting the pH of the resulting mixture to 6.5–7.5, and then subjecting it to ultrasonic treatment to obtain the electrolyte filling material. The electrolyte filling material obtained by this invention is a stable dispersion system. Compared with kaolinite fillers, its stability is significantly improved, and it does not exhibit stratification over a longer application period. The resulting electrode has a more stable potential difference.

The invention belongs to the technical field of protective coatings, and particularly relates to a special explosion-proof corrosion-resistant pressure vessel protective material and a preparation method thereof. The problem that high strength, high flame retardance and high corrosion resistance of a current protective material restrict one another at the same time is solved. Through an innovative functional complex design and a preparation process, synergistic improvement of the three is realized, firstly, tannic acid and borax are used for carrying out functional modification on halloysite nanotubes, and a TA-B-coated HNTs functional complex is prepared; then, mixing the complex with polyether diamine and diethyltoluenediamine, and carrying out vacuum defoaming to obtain mixed resin; and finally, respectively heating the isocyanate prepolymer and the mixed resin to specific temperatures, and carrying out high-pressure impact mixing and rapid reaction to form the protective material.

The application provides a monolithic adsorbent based on 3D printing technology. The application selects halloysite nanotubes and hydroxypropyl methyl cellulose as binders. The halloysite nanotubes have excellent high-temperature resistance, hardness and durability, and chemical stability, and can meet the application requirements of the catalyst under high-temperature complex working conditions, so that the catalyst structure remains mechanical stability. The hydroxypropyl methyl cellulose has processability and plasticity, and can help to print complex shapes and structures. The super strong bonding force and interlayer adhesion can effectively bond the printing materials, ensure the firmness and stability of the interlayer adhesion in the printing process, and help to reduce the distortion and deformation in the printing process. The monolithic passive NO x adsorbent provided by the application has a simple and feasible preparation method, is a non-noble metal adsorbent with economic benefits, and can be connected in series with a downstream SCR treatment unit to realize ultra-low emission in the NOx cold start stage.

The invention discloses a nano composite material which is prepared by taking halloysite nanotubes as a base material and has room-temperature phosphorescence performance and a preparation method of the nano composite material, and belongs to the technical field of fluorescent materials. The nano composite material with the room temperature phosphorescence performance is prepared from the following raw materials: a polyacrylamide grafted halloysite nanotube and 2, 4, 6-tri-(4-bromophenyl)-[1, 3, 5] triazine. Polyacrylamide grafted halloysite nanotubes and 2, 4, 6-tri-(4-bromophenyl)-[1, 3, 5] triazine are used as raw materials, the composite carbon dot material with room-temperature phosphorescence performance is successfully prepared through a thermal induction in-situ reaction, and the product structure is proved to accord with the expectation based on the characterization of the structure and the microstructure. The preparation method disclosed by the invention is simple and convenient, extremely short in time consumption and easy to prepare, does not need a solvent or high-temperature and high-pressure reaction conditions, and has a good application prospect. The prepared HNTs-TBPT can emit yellow light (the peak value is 500 nm), and the phosphorescence service life tau is 266.0 ms.

The invention discloses a high-strength XLPE insulating fireproof flame-retardant low-voltage power cable and a preparation method thereof, and relates to the technical field of cable preparation. The cable sequentially comprises a wire core, a supporting structure, a mica tape, a semi-conductive shielding layer, an inner sheath, a flame-retardant wrapping layer and an outer sheath from inside to outside. The supporting structure is a cross-linked polyethylene foaming structure, and the surface of the supporting structure is coated with a flame-retardant coating; the flame-retardant coating is prepared from the following raw materials: chlorosulfonated polyethylene emulsion, acrylic emulsion, ammonium polyphosphate, pentaerythritol, melamine, starch, chopped glass fibers, modified halloysite nanotubes, potassium silicate, zinc borate, a silane coupling agent, chlorinated paraffin, a wetting dispersant, a defoaming agent and water. By optimizing the cable structure and the raw materials of the flame-retardant coating, the mechanical property, fire resistance and flame retardance of the cable can be improved.

The invention belongs to the technical field of cement, and particularly relates to environment-friendly green cement as well as a preparation method and application thereof. The cement provided by the invention is prepared from the following components in parts by weight: 180 to 240 parts of cement; 120 to 160 parts of silica fume; 40 to 80 parts of quartz sand; 6 to 12 parts of a MgAl-LDH (at) CNTs composite material; 15 to 25 parts of a halloysite nanotube; 4 to 8 parts of acid modified silicon nitride nanofiber; 8-12 parts of a water reducing agent; 4-8 parts of a dispersant; and 160 to 200 parts of water. The MgAl-LDH is loaded on the surfaces of the CNTs in situ, agglomeration caused by excessive winding between the CNTs is reserved, dispersion of the MgAl-LDH and the CNTs in the cement is promoted, improvement of the mechanical property of the cement is promoted, meanwhile, the halloysite nanotubes and the acid-modified silicon nitride nanofibers are matched, the comprehensive performance of the cement is effectively improved, and the cement has the good application prospect. Therefore, the composite material can be widely applied to building exterior walls.

The present application belongs to the technical field of high polymer protective material, and particularly relates to a preparation method and application of a photo-thermal super-hydrophobic coating with self-repairing and anti-icing and de-icing performances. The present application first loads 1,10-phenanthroline into the lumen of halloysite nanotubes through vacuum-assisted adsorption, then forms a polydopamine coating layer on the surface of the halloysite nanotubes by in-situ self-polymerization of dopamine under alkaline conditions, and then modifies the composite particles by silanization and fluorination to endow the particles with low surface energy. Finally, the obtained composite filler is uniformly dispersed in epoxy resin, coated and cured to form a coating. The coating prepared by the method of the present application exhibits excellent super-hydrophobicity and self-repairing performance, and can accurately release corrosion inhibitor to restore its protective performance when damaged. In addition, the coating exhibits excellent icing delay and active de-icing performance. The photo-thermal self-repairing super-hydrophobic coating provides a promising solution to the corrosion and icing challenges in low-temperature marine environments.

This invention belongs to the field of anti-corrosion coating technology, and provides a self-healing anti-corrosion coating for overhead pipelines with color-responsive early warning function and its preparation method. Halloysite nanotubes loaded with corrosion-inhibiting components and drying oil are used as functional units. Combined with an iron tannate complex layer and silane coupling modification, functionalized fillers are prepared, and a light-colored contrast primer and a functional topcoat are constructed. A composite coating is formed through layered coating and curing. Under the action of corrosive media, the coating can provide a visual early warning of damaged areas through color changes. Simultaneously, it repairs microcracks and local defects through the release of corrosion-inhibiting components, filling with drying oil, and interfacial complexation. Furthermore, a sheet-like barrier structure extends the transmission path of corrosive media. The resulting coating combines anti-corrosion protection, damage indication, and self-healing functions, making it suitable for long-term protection of overhead pipeline surfaces.

The invention belongs to the technical field of high polymer materials, and provides a high-strength PBAT material and a preparation method and application thereof.The high-strength PBAT material is characterized by being prepared from, by weight, 92-100 parts of PBAT, 3-6 parts of modified halloysite nanotubes, 0.1-0.2 part of compatilizer, 0.5-2 parts of lubricant and 0.5-1 part of antioxidant. The preparation method comprises the following steps: weighing the raw materials in parts by weight, uniformly mixing the PBAT, the modified halloysite nanotubes, the compatilizer, the lubricant and the antioxidant to obtain a mixture, adding the mixture into a double-screw extruder for melt extrusion, and cooling and granulating to obtain the PBAT material with strong barrier ability, high mechanical property and high thermal stability. And when the film is applied to the field of food packaging films, the film has the advantages of high mechanical strength, strong water and gas barrier properties, easy degradation, no white pollution, environmental protection, no pollution and good application prospect.

The application discloses a kind of multiple confined catalytic ceramic nanofiber membranes and preparation method and application thereof, the multiple confined catalytic ceramic nanofiber membrane is asymmetric flat ceramic membrane, including porous ceramic membrane support, halloysite nanotube layer and catalyst with Fenton-like catalytic activity, the halloysite nanotube layer is attached to the surface of the porous ceramic membrane support, the catalyst is loaded on the surface and the pore of the porous ceramic membrane support, the catalyst is also loaded on the surface and the pore of halloysite nanotube in the halloysite nanotube layer.The multiple confined catalytic ceramic nanofiber membrane of the application is extremely strong in hydrophilicity, membrane flux is high, Fenton-like catalytic activity is high, can efficiently oxidize and remove new pollutants in water, and catalyst stability is strong, can be widely applied in medical wastewater and various water treatments.