135 results about "Hexadecyltrimethylammonium bromide" patented technology

The present invention relates to the technical field of antibacterial materials, and in particular to an antibacterial material comprising black talc and manganese oxide, and a preparation method thereof. The antibacterial material comprising black talc and manganese oxide loaded on its surface, wherein the manganese oxide comprises Mn3O4 and MnOOH. The antibacterial material is obtained by loading manganese oxide on the surface of the black talc using potassium permanganate, urea, and hexadecyltrimethylammonium bromide as raw materials and employing a hydrothermal reaction in-situ synthesis method. The present invention utilizes the unique layered structure of black talc and synthesizes manganese oxide on the surface of the black talc using a liquid phase in-situ synthesis method. The crystal phase and morphology of the manganese oxide are controlled by adding black talc and regulating the synthesis temperature. This material not only improves the stability of the manganese oxide, reduces aggregation, and exhibits high antibacterial properties, but also enhances its biocompatibility, exhibits low cytotoxicity and low hemolytic properties, and is suitable for various biomedical applications.

The invention relates to the technical field of intermetallic compound catalysts, and particularly discloses a preparation method of a hexagonal layered Pt-Bi intermetallic compound nanocrystalline catalyst, which comprises the following steps: weighing octadecene and oleylamine, and mixing to obtain a solution A; platinum acetylacetonate, bismuth acetate, ascorbic acid and hexadecyl trimethyl ammonium bromide are weighed and sequentially poured into the solution A, and a solution B is obtained through mixing and ultrasonic treatment; heating and preserving heat of the solution B, and naturally cooling to room temperature to obtain a turbid liquid C; and measuring cyclohexane and ethanol, sequentially pouring into the turbid liquid C, carrying out ultrasonic treatment at room temperature for 3 minutes, then pouring out supernate, repeating for 2-3 times, collecting a product, and drying to obtain the nanocrystalline catalyst. According to the invention, the electron interaction between bimetallic components is utilized, the electron structure of a catalytic active center is optimized, the interaction between the active structure and reaction active species is enhanced, the evolution kinetics of a plurality of reaction intermediates such as * O and * OOH in the electrocatalytic oxygen reduction reaction can be obviously accelerated, and the kinetics rate of the four-electron oxygen reduction reaction is improved.

The invention relates to the technical field of photocatalysts, in particular to a bismuth-defect bismuth oxybromide-sulfur-defect bismuth sulfide bromide heterojunction and a preparation method and application thereof in photocatalytic CO2 reduction, Bi (NO3) 3.5 H2O, thiourea, cetyltrimethylammonium bromide (CTAB) and the like are used as raw materials, and the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction is prepared through a two-step hydrothermal method. According to the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction, bismuth vacancies and sulfur vacancies are introduced, the visible light absorption range of the material is expanded through a proper amount of double vacancies, more electron capture centers are provided, and the separation efficiency of photo-induced electrons and the vacancies is improved, so that the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction has excellent performance of photocatalytic reduction of CO2, and the preparation method of the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction is suitable for large-scale production and application of the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction. CO2 can be reduced into a single product CO, and the photoreduction efficiency of the carbon dioxide can be improved.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an adsorption particle electrode for wastewater and waste liquid treatment and a preparation method thereof. The preparation method comprises the following steps: adding a zinc salt, a vanadium salt, a scandium salt and cetyltrimethylammonium bromide into water, stirring, adjusting the pH value at 70-80 DEG C, continuously stirring, filtering, drying and calcining to obtain modified mesoporous zinc oxide; and dispersing the modified mesoporous zinc oxide in water, adding the composite aerogel, soaking, filtering, washing, drying and grinding to obtain the adsorption particle electrode. The adsorption particle electrode prepared by the invention can be used for degrading printing and dyeing wastewater, and has the excellent performances of high degradation rate, high degradation speed, reusability and the like.

The invention relates to the technical field of fibers, in particular to a PHBV-containing bio-based high-strength antibacterial fiber and a preparation method thereof.The fiber is obtained by conducting blending and electrostatic spinning on environment-friendly materials including silk fibroin, polyoxyethylene, PHBV and a composite natural antibacterial agent; 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide, a composite natural antibacterial agent and carboxymethyl chitosan are used as raw materials to prepare a cross-linking steeping liquor, and the electrostatic spinning fibers are subjected to cross-linking modification treatment in the cross-linking steeping liquor; lignin and hexadecyl trimethyl ammonium bromide are combined for electrostatic assembly to coat a natural antibacterial agent to serve as a pretreatment natural antibacterial agent, 3-chloropropyl-trimethoxysilane serves as a coupling agent, ethylenediamine serves as an amination modification reagent, an amination natural antibacterial agent is obtained, and then a bio-based bacterial adhesion prevention flame-retardant polymer is grafted.

The invention discloses a zinc oxide composite sunscreen material based on mesoporous silica, and preparation and application thereof, and belongs to the technical field of sunscreen of cosmetics. In order to solve the technical problem that the sunscreen efficiency is reduced due to the fact that nano-zinc oxide synthesized by an existing method is easy to aggregate and poor in dispersion stability, the technical scheme is characterized in that triethanolamine, sodium salicylate, tetraethoxysilane and cetyltrimethylammonium bromide are used as raw materials to prepare a carrier mesoporous silica microsphere; mSN (NH2) is obtained through amination treatment of mesoporous silica microspheres, zinc acetate dihydrate and anhydrous sodium carbonate are adopted as raw materials, nano-zinc oxide is successfully loaded on the surface of the MSN (NH2) through secondary deposition, and the sunscreen material MSN (NH2) (at) ZnO which is high in sunscreen performance, good in dispersion stability, high in oil absorption value and good in carrier function is prepared.

This invention provides a photocatalytic composite nanoenzyme self-cleaning coating, its preparation method, and its application. Specifically, it includes: preparing solution A with Ca(NO3)2·4H2O and nano-cerium oxide; preparing solution B with (NH4)2HPO4 and hexadecyltrimethylammonium bromide; mixing solutions A and B, and reacting at high temperature to obtain cerium oxide nanoenzyme / hydroxyapatite microspheres; and using (NH4)6Mo7O... 24 Solution M is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solution N is prepared by dissolving Fe(NO3)3·9H2O in deionized water; solutions M and N are mixed to obtain a precursor; the precursor is reacted with cobalt oxide at high temperature to obtain Co / Fe2(MoO4)3; tetraethyl orthosilicate, anhydrous ethanol, deionized water, and ammonia are mixed and sealed for aging; after adding a modifier, it is mixed with cerium oxide nanoenzyme / hydroxyapatite microspheres and Co / Fe2(MoO4)3, sprayed onto the obtained composite coating, and cured at high temperature to obtain a self-cleaning coating. This invention, by loading a photocatalyst and nanoenzyme / hydroxyapatite microspheres onto the surface of a modified SiO2 gel, effectively improves the photocatalytic activity and self-cleaning performance of the coating while maintaining good optical transmittance.

The present invention relates to the field of coating materials and provides a carbon fiber-based anti-skid coating and a preparation method thereof. The coating consists of two components, A and B. Component A comprises KH-570 silane coupling agent surface-modified carbon fiber, dog-bone-shaped nano-silica, epoxy-modified hydroxyl acrylic resin, quartz sand anti-skid aggregate, propylene glycol methyl ether acetate, iron oxide pigment and other additives, and component B is an HDI trimer curing agent. The surface-modified carbon fiber is prepared by cleaning and activation, silane coupling agent impregnation, drying and curing, and the like. The dog-bone-shaped nano-silica is prepared by a sol-gel method using hexadecyltrimethylammonium bromide and polyvinylpyrrolidone as morphology directing agents. The preparation method includes the steps of preparing iron oxide color paste, dispersing functional components, adding quartz sand, aging treatment and two-component mixing and curing. The coating has excellent dry anti-skid properties, wet anti-skid properties, wear resistance and durability, and is suitable for the field of anti-skid coating on the ground.

This invention discloses a crack-resistant rheologically modified functional material for steel-concrete composite cable towers, its preparation method, and its application. The crack-resistant rheologically modified functional material of this invention comprises 1-10 μm ultrafine light-burned magnesia expandable material, 15-30 μm medium-fine light-burned magnesia expandable material, 30-100 μm medium-coarse calcareous expandable material, 0.1-2 μm fly ash microspheres, 0.02-0.05 μm nano-silica, and an anti-agglomeration regulating material. The anti-agglomeration regulating material is composed of a zirconium aluminate coupling agent and hexadecyltrimethylammonium bromide. This crack-resistant rheologically modified functional material is applied to the concrete of ultra-high strength steel-concrete composite cable tower structures. Concrete prepared using the crack-resistant rheologically modified functional material of this invention exhibits low viscosity, good anti-segregation properties, and volume stability, achieving a synergistic unity of rheological modification and crack-resistant expansion in the concrete of ultra-high strength steel-concrete composite cable tower structures.

This invention discloses a method for preparing a highly coordinated sulfur-doped single-atom catalyst and its application, comprising the following steps: S1, mixing and stirring zinc nitrate hexahydrate, dimethylimidazole, hexadecyltrimethylammonium bromide, a metal source, and deionized water to obtain metal-doped ZIF-8; S2, heating the metal-doped ZIF-8 under an argon atmosphere to obtain an undoped metal single-atom catalyst; S3, preparing the undoped metal single-atom catalyst into a highly coordinated sulfur-doped metal single-atom catalyst; S4, adding the highly coordinated sulfur-doped single-atom catalyst to antibiotic wastewater for treatment; This invention avoids coordination in the first shell of the metal atom by mixing the single-atom catalyst and thiourea and performing a second pyrolysis, thereby forming a sulfur-doped highly coordinated single-atom catalyst.

This invention belongs to the interdisciplinary field of biomedical engineering, materials science, and tissue engineering, and discloses a multifunctional hydrogel with switchable mechanical and adhesive properties based on temperature triggering, its preparation method, and applications. The invention consists of acrylic acid, gelatin, hexadecyltrimethylammonium bromide, polydopamine nanoparticles loaded with silver nanoparticles, and water. This invention not only exhibits excellent adhesion and mechanical properties to skin tissue but also possesses switchable mechanical and adhesive properties, achieving durable and repeatable adhesion. The temperature-triggered hydrogel prepared by this invention is simple to process, low in cost, and introduces no toxic chemicals. It can achieve a close fit at body temperature and natural detachment at low temperatures, driven by temperature, and maintains excellent adhesion properties even in complex environments, thus promoting the development of intelligent medical multifunctional wound dressings.

The invention discloses a close-packed hexagonal-phase triangular-sheet-shaped nano-palladium catalyst and a preparation method thereof, and belongs to the technical field of nano-material preparation. According to the preparation method, palladium acetylacetonate is taken as a reactant, N, N-dimethylformamide is taken as a reaction solvent, hexadecyl trimethyl ammonium bromide is taken as a reducing agent and a crystal phase structure control agent, molybdenum hexacarbonyl is taken as a morphology control agent, and the close-packed hexagonal-phase triangular-sheet-shaped nano-palladium catalyst with regular morphology and controllable size is prepared through a simple liquid-phase thermochemical reduction method. The specific surface area of the two-dimensional sheet structure is large, the number of unsaturated atoms on the surface is large, interface charge transfer is fast, and improvement of the electro-catalytic performance is facilitated; and the triangular structure can provide more edge active sites, so that the catalytic activity can be further improved.

The present invention discloses a modified vermiculite-loaded cubic cobalt-manganese spinel material and a preparation method thereof, belonging to the technical field of environmental remediation functional materials. The present invention first synthesizes cubic cobalt-manganese spinel by in-situ coprecipitation on the surface and interlayers of vermiculite. The vermiculite-loaded cubic cobalt-manganese spinel material is then modified using hexadecyltrimethylammonium bromide to prepare the modified vermiculite-loaded cubic cobalt-manganese spinel material. The reaction conditions are mild, and no toxic or hazardous raw materials are involved. The prepared catalyst is stable, efficient, and environmentally friendly, effectively reducing the activation energy of oxidants such as peroxymonosulfate, thereby achieving efficient removal of perfluorooctanoic acid.

The invention provides a nano rare earth oxide as well as a preparation process and application thereof, and relates to the technical field of nano materials. The nano rare earth oxide is prepared from the following raw materials: rare earth ions, chitosan-hexadecyl trimethyl ammonium bromide, tea saponin, nano cellulose and a hydroxyapatite nano rod; the rare earth ions are selected from at least one of cerium ions Ce < 3 + >, yttrium ions Y < 3 + >, samarium ions Sm < 3 + >, terbium ions Tb < 3 + >, lanthanum ions La < 3 + >, praseodymium ions Pr < 3 + > and neodymium ions Nd < 3 + >. The prepared nano rare earth oxide can be used as an independent antibacterial agent, can also be used as a functional filler to be compounded with a polymer, and has application potential in the fields of medical instrument coatings, food packaging and the like.

This invention provides a nitrogen-doped carbon composite cobalt-nickel diselenide nanocubic material, its preparation method, and its application in batteries. The invention involves dispersing cobalt salt, nickel salt, and hexadecyltrimethylammonium bromide in a solvent and mixing to obtain solution A; dispersing an organic ligand in the solvent and mixing to obtain solution B; pouring solution A into solution B and aging at room temperature to obtain a nanocubic precursor; then mixing with selenium powder and calcining under a protective atmosphere to obtain the CoNiSe2 / NC composite material. Compared with existing technologies, the synergistic effect of Co and Ni in this invention provides more active sites for the reaction and improves conductivity, resulting in a significant improvement in sodium-ion battery performance. Furthermore, the synthesis in this invention is performed at room temperature, simplifying the process; the porous structure design greatly improves the battery's cycle stability, extends its lifespan, and increases and stabilizes its capacity.

The invention discloses a Fe-modified TiO2 hollow microsphere photo-Fenton catalyst as well as a preparation method and application thereof, and relates to the technical field of catalyst preparation, and the preparation method comprises the following steps: preparing TiO2 microspheres with hollow structures from hexadecyl trimethyl ammonium bromide, absolute methanol, deionized water and tetrabutyl titanate; the method comprises the following steps: mixing ferrocene and 0.25 C-TiO2 powder, putting the mixture into a quartz tube, putting the quartz tube into a muffle furnace, heating and pyrolyzing according to a two-stage program, alternately washing black powder with absolute ethyl alcohol and deionized water after the pyrolysis is finished, and drying to obtain a sample CT-5Fe; the preparation method comprises the following steps: dispersing CT-5Fe in an H2O2 solution, carrying out a water bath reaction, collecting a gray product, carrying out centrifugal operation, washing, and drying to obtain the Fe-modified TiO2 hollow microsphere photo-Fenton catalyst, namely CT-5Fe-HO. According to the invention, a photocatalysis-Fenton-like coupling system for phenol degradation is constructed, the PMS adsorption and activation capability is enhanced, high activity and good cycle stability are maintained in a wide pH range and in a complex water body, and a solution is provided for water body pollution treatment.

The invention relates to a [BMIM] Cl (at) MCM-41 catalyst and a method for synthesizing methyl trichlorosilane, the preparation method of the catalyst comprises the following steps: a) preparing an MCM-41 mesoporous molecular sieve by adopting a hydrothermal synthesis method, the specific method for preparing the MCM-41 mesoporous molecular sieve is as follows: taking cetyltrimethylammonium bromide (CTAB) as a template agent, taking tetraethyl orthosilicate (TEOS) as a silicon source, and adopting a hydrothermal synthesis method for preparing the MCM-41 mesoporous molecular sieve; the preparation method comprises the following steps of: mixing and stirring the MCM-41 molecular sieve serving as a raw material and tetramethylammonium hydroxide (TMAOH) serving as an alkali solution to form gel, dealcoholizing, crystallizing, washing, drying and calcining to obtain the MCM-41 mesoporous molecular sieve. The [BMIM] Cl (at) MCM-41 is used as the catalyst for synthesizing methyl trichlorosilane by a Grignard reagent method, the mesoporous structure of the MCM-41 improves the diffusion efficiency of reactants, and the structure is matched with the molecular size of the ionic liquid to form a uniformly dispersed active center and shorten the contact path of the reactants.

This invention discloses a platinum-cobalt phosphate catalyst for the selective electrooxidation of ethylene glycol to glycolic acid, its preparation method, and its application. The preparation method includes: S1, pretreating nickel foam (NF); S2, dissolving disodium hydrogen phosphate dodecahydrate and hexadecyltrimethylammonium bromide in a mixture of water and ethylene glycol, adding cobalt nitrate and stirring to obtain a precursor; S3, immersing the nickel foam in the precursor solution and refrigerating it overnight at low temperature; S4, transferring it to a reaction vessel and hydrothermally heating it at 160 °C for 10 hours to obtain cobalt phosphate (CoPO / NF); S5, using CoPO / NF as the working electrode, electrochemically depositing platinum in an H2PtCl6 and KOH electrolyte using cyclic voltammetry; S6, washing and vacuum drying to obtain the final product. This invention is the first to prepare a platinum-cobalt phosphate catalyst for the selective electrooxidation of ethylene glycol to glycolic acid at 100 mA cm⁻¹. ‑2 With a working potential of only 0.67 V at current density (relative to RHE) and a Faraday efficiency of 100% for glycolic acid, it has significant advantages and application potential in the highly selective production of glycolic acid in the electro-oxidation reaction of ethylene glycol.

This invention discloses an indium phosphide quantum dot-bismuth tungstate composite material, its preparation method, and its application, relating to the field of photocatalytic materials technology. The preparation method includes the following steps: Indium precursor is added to oleylamine and mixed; the mixture is gradually heated and kept at a constant temperature under nitrogen protection; then, tris(diphenylphosphine) is added at 170-190°C to react and obtain indium phosphide quantum dots; bismuth nitrate is dispersed in water, and hexadecyltrimethylammonium bromide and sodium tungstate are added sequentially, followed by a hydrothermal reaction to obtain bismuth tungstate microflowers; indium phosphide quantum dots and bismuth tungstate microflowers are added to deionized water, mixed evenly, heated to react, cooled to room temperature, washed, and dried to obtain the indium phosphide quantum dot-bismuth tungstate composite material. This invention also discloses the indium phosphide quantum dot-bismuth tungstate composite material prepared by the above method and its application. This composite material has the function of photocatalytic H2O2 production and has significant application value in the treatment of coking wastewater.

The present invention relates to the technical field of biodegradable materials, and specifically discloses a biodegradable material for adding BBM bamboo powder and its application in beer bottles. The raw materials of the above-mentioned biodegradable material for adding BBM bamboo powder include by mass: 10-20 parts of polybutylene succinate, 10-30 parts of polybutylene adipate terephthalate, 10-20 parts of bamboo powder, 1-3 parts of dopamine hydrochloride, 0.1-0.5 parts of n-butylamine, 1-2 parts of hexadecyltrimethylammonium bromide, 1-5 parts of tetraethyl orthosilicate, 1-2 parts of tetrabutyl titanate, 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of antioxidant, and 1-2 parts of plasticizer. The BBM obtained by the present invention has excellent mechanical properties, while improving the anti-ultraviolet strength of degradable materials to a certain extent, and has good biodegradability.

The invention discloses an antibacterial wear-resistant composite nylon yarn and a preparation process thereof, and relates to the technical field of textile materials. The invention discloses an antibacterial wear-resistant composite nylon yarn. The nylon 66 composite material is prepared from the following raw materials in parts by weight: 45 to 65 parts of nylon 66 slices, 2 to 5 parts of nano silicon carbide, 3 to 7 parts of nano zinc oxide, 4 to 8 parts of micron-sized zirconium dioxide, 6 to 10 parts of modified sepiolite fiber, 5 to 9 parts of polyvinyl butyral, 7 to 12 parts of butyl acrylate-styrene copolymer, 4 to 8 parts of polyethersulfone, 1 to 3 parts of hexadecyl trimethyl ammonium bromide and 0.5 to 2 parts of hindered amine light stabilizer 944. The self-repairing coating is prepared from the following components in parts by weight: 0.3 to 1 part of dicumyl peroxide, 2 to 4 parts of adipic dihydrazide, 3 to 6 parts of nanoscale anatase type titanium dioxide, 5 to 10 parts of self-repairing microcapsules and 8 to 15 parts of modified cellulose nanowhiskers. According to the invention, various functional raw materials are cooperated, so that the nylon yarn has antibacterial and wear-resistant properties and the like. The performance of the raw materials is improved through the modified cellulose nanowhiskers and the sepiolite fibers. And the product quality and performance are ensured through accurate technological parameters, the requirement for high-performance materials is met, and the application prospect is achieved.

A carbon-supported elemental bismuth / bismuth oxycarbonate composite photocatalyst, its preparation method, and application relate to the field of photocatalytic materials. A bismuth complex is first prepared by ultrasonically heating hexadecyltrimethylammonium bromide, thiourea, and bismuth nitrate pentahydrate. The bismuth complex is then physically mixed with chitosan and annealed under vacuum conditions to produce a carbon-supported elemental bismuth / bismuth oxycarbonate composite photocatalyst. This carbon-supported elemental bismuth / bismuth oxycarbonate composite photocatalyst consists of hollow elemental bismuth / bismuth oxycarbonate nanoshells anchored on the surface of an amorphous carbon bed. The nanoshells have an outer diameter of 100-200 nm and a thickness of approximately 20-30 nm. This composite photocatalyst has abundant active sites, significantly enhances visible light absorption, promotes the separation and transport of photogenerated carriers, and exhibits excellent catalytic activity in visible light photocatalytic reduction of CO2.

The invention discloses a coating type catalytic electrode and a preparation method and application thereof.The preparation method comprises the steps that copper chloride dihydrate, cobalt nitrate, hexadecyl trimethyl ammonium bromide and foamy copper serve as raw materials, and three catalysts of CuOx, CoOx and CoOx / CuOx are firstly prepared through a hydrothermal method and an annealing calcination method; and preparing the catalyst into slurry, and coating the slurry on a foamy copper substrate subjected to acid treatment and roasting independently or uniformly mixed to obtain a coating type CoOx electrode, a CoOx / CuOx electrode and a CoOx + CuOx electrode. The coating type catalytic electrode is applied to a reaction for electro-catalytic synthesis of 6-aminocapronitrile, a three-electrode system is adopted, 0.1 M cyclohexanone and 500 ppm ammonium chloride are used as electrolyte, and the reaction is carried out within the RHE potential range of-0.6 V vs to-1.1 V vs. The preparation process is simple and easy to control, green and environment-friendly, the raw materials are cheap and rich in resources, the problems of high energy consumption, low selectivity and dependence on precious metal catalysts in the traditional 6-aminocapronitrile synthesis are effectively solved, and the industrial production requirements are met.

This invention provides a kit for the detection of interleukin-23, its method of use, and its application, relating to the field of in vitro detection. The kit for interleukin-23 detection provided by this invention comprises a pre-activation solution and an activation solution; the pre-activation solution comprises 0.03-0.15 mol / L hydrogen peroxide and 0.01-0.05 mol / L benzoic acid; the activation solution comprises 0.5-1.5 mol / L sodium hydroxide and 3-8 g / L hexadecyltrimethylammonium bromide; this kit can be used to determine interleukin-23 in serum, exhibiting high accuracy, high signal-to-noise ratio, and strong stability.

The invention belongs to the technical field of intelligent wearable electronics, and particularly relates to a preparation method of an MXene / CNTs / TPU fiber membrane flame-retardant flexible strain sensor with a bimodal fold structure. The preparation method comprises the following steps: washing and drying a TPU fiber membrane, soaking the TPU fiber membrane in chloroform (CHCl3) for swelling, and fixing and drying the TPU fiber membrane by using a mold; the pretreated fiber membrane is soaked in a cetyl trimethyl ammonium bromide (CTAB) solution to be subjected to modification treatment; then the TPU fiber is put into an MXene / CNTs mixed solution for ultrasonic treatment, so that MXene / CNTs are evenly attached to the surface of the TPU fiber, demolding is conducted after deswelling, and a fiber membrane retracts; and repeating the steps of CTAB (Cetyltrimethyl Ammonium Bromide) modification and MXene / CNTs attachment, so as to prepare the MXene / CNTs bimodal folded conductive fiber membrane with different buckling. Phytic acid (PA) is attached to the surface of the fiber through a repeated impregnation method, then a copper electrode is assembled and packaged with PDMS, and the flame-retardant flexible strain sensor with the bimodal folded conductive structure is obtained.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

The invention relates to double transition metal doped manganese sulfide-cyclodextrin (MnM1M2S3-CD) as well as a preparation method and an application of the double transition metal doped manganese sulfide-cyclodextrin (MnM1M2S3-CD). The preparation method comprises the following steps: suspending cyclodextrin in an ethanol solution containing Mn < 2 + >, transition metal M < 12 + > and transition metal M < 2 + >, and stirring and reacting for 2.0-24.0 hours at 0-60 DEG C in an N2 atmosphere; after stirring is completed, a reaction mixture is subjected to suction filtration and ethyl alcohol washing, and cyclodextrin solids adsorbing Mn < 2 + >, transition metal M < 12 + > and transition metal M < 2 + > are obtained. The method comprises the following steps: putting a cyclodextrin solid adsorbed with metal ions, thiourea and hexadecyl trimethyl ammonium bromide into a hydrothermal kettle, and carrying out hydrothermal reaction at 100-200 DEG C for 8.0-48.0 hours; and washing the obtained solid with ethanol and deionized water, and carrying out vacuum drying at 80 DEG C to obtain the double transition metal doped manganese sulfide-cyclodextrin (MnM1M2S3-CD). The invention discloses a method for preparing ethanol by reducing CO2 under driving of visible light. The method is carried out at room temperature, uses visible light as an energy source and water as a solvent and a hydrogen source, and has the characteristics of environmental protection, energy conservation and emission reduction.

This invention discloses a method for preparing EBSD analysis samples of nickel-based resistance alloy foil, comprising: using stainless steel as the cathode and nickel-based resistance alloy foil as the anode, connected to the negative and positive terminals of a constant current and voltage regulated power supply, respectively; immersing the anode and cathode in an electrolytic polishing solution for electrolytic polishing; the raw materials of the electrolytic polishing solution include phosphoric acid, sulfuric acid, hydrochloric acid, hexadecyltrimethylammonium bromide, and water; after completion, removing the nickel-based resistance alloy foil, washing, and drying. The electrolytic polishing solution used in this invention can effectively remove the stress layer on the surface of the foil, resulting in a smooth and clean surface without continuous corrosion pits. It has advantages such as wide availability of materials, simple preparation, low price, and high calibration rate. The electrolytic polishing method of this invention is easy to operate, requires short sample preparation time, has low cost, and stable results, effectively reducing the hardware requirements for foil EBSD sample preparation and facilitating widespread application.

The invention provides a novel urchin-shaped ordered carbon-iron composite material as well as a preparation method and application thereof, and belongs to the technical field of carbon nanomaterials. The preparation method comprises the following steps: by taking triethanolamine, cetyltrimethylammonium bromide, sodium salicylate and tetraethyl silicate as raw materials, mixing and stirring, carrying out hydrothermal reaction, washing and centrifuging, drying and calcining in an air atmosphere to obtain an urchin-shaped silicon template; then compounding the silicon template and dopamine in a Tris solution, and carrying out stirring ultrasonic treatment, standing in a dark place and centrifugal drying to obtain mesoporous silicon filled with polydopamine; and mixing the product with ferrocene in acetone, adding a hydrogen peroxide solution, carrying out oil bath stirring until the solvent is volatilized, drying, calcining in an inert atmosphere, and finally, carrying out alkaline solution reflux and centrifugal drying treatment to obtain the novel urchin-shaped ordered carbon-iron composite material. The obtained novel urchin-shaped ordered carbon-iron composite material has excellent catalytic activity, and has a good application prospect in the fields of electro-catalysis, engineering materials, energy storage and conversion and the like.

This invention discloses a preparation process for a composite defluorinating agent, belonging to the field of water treatment technology. The process involves dissolving polyethylene glycol in water, adding nano-hydroxyapatite, and stirring to obtain polyethylene glycol-modified nano-hydroxyapatite; hydrolyzing a silane coupling agent in an ethanol-water solution, adding the polyethylene glycol-modified nano-hydroxyapatite, and reacting to obtain silane coupling agent-polyethylene glycol-modified nano-hydroxyapatite; adding the silane coupling agent-polyethylene glycol-modified nano-hydroxyapatite to a hexadecyltrimethylammonium bromide solution and stirring to obtain composite-modified nano-hydroxyapatite; adding the composite-modified nano-hydroxyapatite and β-cyclodextrin to a sodium hydroxide solution, adding a crosslinking agent and an emulsifier, and reacting to obtain composite sustained-release microspheres; adding Fe3O4 powder to an ethanol-water solution, adding the composite sustained-release microspheres, and adding NaOH solution dropwise in a constant-temperature water bath until the pH reaches 9; aging the resulting precipitate, washing with water, and drying to obtain the composite defluorinating agent.