211 results about "Tris hydroxymethylaminomethane" patented technology

The invention discloses self-adhesion-crosslinking double modified bamboo powder, a preparation method and application, and relates to the technical field of composites.The preparation method of the modified bamboo powder comprises the following steps that S1, bamboo powder, 2, 5-dihydroxyterephthalic acid, 4-aminobenzoyl hydrazine, N, N '-diisopropylcarbodiimide and tris (hydroxymethyl) aminomethane are mixed for a reaction; and S2, trimesic acid is added into the solution obtained after the reaction in the S1 for a reaction, filtering, washing and drying are conducted, and the self-adhesion-crosslinking double modified bamboo powder is obtained. The prepared modified bamboo powder is green and environmentally friendly, through a self-adhesion mechanism, a cross-linking mechanism, a branched-chain phenyl heterogeneous nucleation mechanism and the like, the interfacial compatibility of PBAT and the bamboo powder and the crystallinity of PBAT are improved, and therefore the mechanical property of PBAT / bamboo powder is enhanced.

The invention belongs to the technical field of sodium ion negative electrode material preparation, and particularly relates to a double-layer carbon-coated sodium ion battery hard carbon negative electrode material as well as a preparation method and application thereof. The method comprises the following steps: firstly, dispersing activated carbon powder into a tris (hydroxymethyl) aminomethane hydrochloride buffer solution, and then adding dopamine hydrochloride to carry out self-polymerization reaction, so as to obtain activated carbon powder coated with a first layer of polydopamine; then putting the activated carbon powder into a second layer of carbon source precursor solution, and heating in a water bath to obtain double-layer carbon-coated activated carbon powder; and finally, carrying out heat treatment. The preparation method comprises the following steps: firstly, coating the surface of activated carbon with a first layer of polydopamine by an in-situ polymerization method, then promoting uniform coating of a second layer of carbon source precursor by utilizing strong adhesion of the polydopamine, and carrying out heat treatment to obtain the double-layer carbon-coated hard carbon negative electrode material. The hard carbon negative electrode material can improve the energy density of the current sodium ion battery and accelerate the industrial application of the sodium ion battery.

The invention relates to the technical field of biological detection, and discloses a mycoplasma pneumoniae nucleic acid rapid detection method, which comprises the following steps: mixing a sample to be detected with a multifunctional pretreatment buffer solution containing tris (hydroxymethyl) aminomethane, potassium acetate, polyethylene glycol, saponin, spermine tetrahydrochloride and tris (2-carboxyethyl) phosphine hydrochloride, and carrying out cracking treatment; a cracking mixed solution is obtained; redissolving the enzymatic isothermal amplification basic reagent, the specific primer and the probe to obtain a redissolving amplification system; sucking the supernatant of the cracking mixed solution, adding the supernatant into a redissolving amplification system, and adding a magnesium acetate solution to obtain a reaction mixed solution to be detected; and carrying out isothermal amplification and signal acquisition to obtain a detection conclusion. The multifunctional pretreatment buffer solution is used for cracking the to-be-detected sample, sample liquefaction, cracking and nucleic acid release are completed in a single system, the nucleic acid extraction and purification step of centrifugal column adsorption or magnetic bead elution is avoided, and the operation process is simplified.

The invention relates to the technical field of bioanalytical chemistry, in particular to a method for simultaneously enriching and separating glycopeptides and phosphopeptides by using a bionic hydrophilic adsorbent, which specifically comprises the following steps: step 1, preparing a polyether-ether-ketone (PEEK) framework by using a fused deposition modeling method (FDM); 2, soaking the obtained PEEK framework in an aqueous solution containing dopamine hydrochloride and tris (hydroxymethyl) aminomethane, and carrying out a reaction; step 3, then, adding a mixed solution containing hyaluronic acid methacrylate, vinyl phosphoric acid, N, N-dimethyl bisacrylamide and phenyl-2, 4, 6-trimethylbenzoyl lithium phosphate into the PEEK framework; in the invention, in the aspect of material preparation, a fused deposition modeling method (FDM) is adopted to prepare a polyether-ether-ketone (PEEK) frame, and the material has good mechanical properties and chemical stability and can bear a series of subsequent complex treatment processes without being damaged.

The invention discloses a polydopamine modified metatitanic acid type lithium ion sieve and a preparation method thereof, and belongs to the technical field of lithium ion sieves, the preparation method comprises the following steps: grinding and uniformly mixing lithium acetate dihydrate and titanium dioxide in an organic solvent, and calcining the mixture at 650-800 DEG C for 3-5 hours to prepare a Li2TiO3 precursor; the preparation method comprises the following steps: putting dopamine hydrochloride, aminated crown ether and a Li2TiO3 precursor into a tris (hydroxymethyl) aminomethane solution with the pH value of 8-9, carrying out a constant-temperature oscillation reaction, carrying out suction filtration, and drying at low temperature, so as to obtain the polydopamine modified metatitanic acid type lithium ion sieve. According to the lithium ion sieve, the adsorption effect on lithium ions can be improved, the lithium extraction efficiency is improved, and the problem of low adsorption capacity of a lithium ion sieve in the prior art is solved.

The invention relates to a composite nanofiber membrane and a preparation method and application thereof, and belongs to the technical field of wearable electromagnetic shielding materials. The preparation method comprises the following steps: dissolving polyacrylonitrile in a solvent, and spinning to obtain a polyacrylonitrile nanofiber membrane; then, the polyacrylonitrile nanofiber membrane is soaked in a trihydroxymethyl aminomethane hydrochloride solution containing dopamine; soaking the dopamine-coated fiber membrane in a mixed solution containing a copper salt or a silver salt, and then soaking the dopamine-coated fiber membrane in a reaction solution to obtain a modified nanofiber membrane; then spraying a dispersion liquid containing a conductive filler onto the modified nanofiber membrane to obtain a conductive filler modified nanofiber membrane; and finally, dissolving polyurethane into a solvent, and spinning by taking the conductive filler modified nanofiber membrane as a receiver to obtain the composite nanofiber membrane. The composite nanofiber membrane has excellent electromagnetic shielding performance, directional perspiration ability, air permeability, photothermal conversion ability, antibacterial property, mechanical strength and flexibility.

The invention relates to an anthrax virus protein nanopore buffer solution system and biomolecule detection application, and belongs to the field of nanopore electrochemistry. The invention aims to solve the problem that an anthrax virus protein nanopore is unstable in electrochemical detection, and provides an anthrax virus protein nanopore buffer solution system and application thereof. The buffer solution is composed of trihydroxymethyl aminomethane and a compound I composed of specific cations and anions, the compound I comprises the cations such as NH4 < + >, K < + >, Li < + > and Mg < 2 + > and the anions such as Cl <->, HCOO <-> and SO4 < 2->, and the stability of nanopores is achieved by optimizing the concentration and the pH value. The method is applied to high-sensitivity and high-selectivity detection of different charged small molecules. According to the technical scheme, the stability of the anthrax virus protein nanopore is remarkably improved, the application prospect of the anthrax virus protein nanopore in the field of single molecule detection is widened, and a new thought and method are provided for development of a nanopore sensing technology.

The invention discloses a protein extracting solution and a protein extracting method of polysaccharide and polyphenol plant tissues, and is characterized in that the protein extracting solution comprises the following components in molar ratio: 180-250 parts of trihydroxymethyl aminomethane hydrochloride buffer solution, 200-300 parts of sugar, 45-55 parts of chlorate, 10-70 parts of beta-mercaptoethanol and 0.5-2 parts of protease inhibitor. The browning condition of the total protein solution obtained by the protein extraction formula is obviously weakened, which indicates that the oxidation of polyphenol is obviously inhibited, the release of protein in a tissue sample is facilitated, and the extracted protein effect is better.

The present application relates to a kind of phosphine oxy group covalent modification composite adsorption material and its preparation method and purposes, the preparation method includes the following steps: (1) mixing dopamine hydrochloride, phosphine-containing substrate, tris-hydroxymethyl aminomethane hydrochloride and sodium hydroxide in solvent, to obtain mixed solution;(2) the mixed solution obtained in step (1) and solid phase material are mixed, then oscillation reaction is carried out, to obtain solid-liquid mixture;(3) the solid-liquid mixture obtained in step (2) is carried out solid-liquid separation, and the solid phase part obtained is sequentially washed and dried, to obtain phosphine oxy group covalent modification composite adsorption material.The phosphine oxy group covalent modification composite adsorption material provided by the present application has excellent adsorption selectivity and material stability, and can be used for the high-selectivity separation and recovery of rare metals indium and gallium.

The present teachings relate to liquid pharmaceutical formulations of furosemide, where the pharmaceutical formulations include a molar excess of tris(hydroxymethyl)aminomethane to furosemide, have a pH in the range of 7 to 8.5, and a concentration of tris(hydroxymethyl)aminomethane greater than or equal to about 50 mM. The present teachings can improve the stability of liquid pharmaceutical formulations including furosemide and the suitability of such pharmaceutical formulations for subcutaneous administration or delivery.

The invention discloses a reagent for nucleic acid extraction and amplification of porcine epidemic diarrhea virus and application, a nucleic acid rapid extraction technology part is a nucleic acid rapid extraction reagent, and the reagent mainly comprises tris (hydroxymethyl) aminomethane (Tris), TritonX-100 (TritonX-100) and chelating resin 100 (Chelex100). The PEDV on-site rapid detection technology comprises an RT-RAA reaction system and a colloidal gold test strip. The RT-RAA reaction system is composed of an RT-RAA nucleic acid amplification reagent, a pair of primers and a probe, and the primers and the probe are used for identifying an N gene conserved region of PEDV. The kit can complete virus nucleic acid extraction and nucleic acid in-vitro amplification and detection within 30 min, the specificity is good, and the detection sensitivity is 101 copies / microliter. The kit disclosed by the invention has the characteristics of simplicity in operation, rapidness and sensitivity, and is suitable for on-site extraction of a large batch of samples and on-site rapid diagnosis of PEDV (Porcine Epidemic Diarrhea Virus).

The invention discloses a urine microalbumin immunoturbidimetry kit and a detection method, and belongs to the technical field of biology. The invention relates to a urine microalbumin immunoturbidimetry kit, which comprises a reagent R1, a reagent R2, a reagent R3 and a reagent R4, wherein the reagent R1 comprises trihydroxymethyl aminomethane, a coagulant, a blocking agent, sodium chloride, bovine serum albumin, trehalose, a preservative and ultrapure water; the reagent R2 is prepared from hydroxyethyl piperazine ethanesulfonic acid, sodium chloride, bovine serum albumin, glycerol, trehalose, a preservative, a mALB monoclonal antibody and ultrapure water; the mALB monoclonal antibody is prepared by mixing a model number of UDA 9107-1, a model number of UDA 9107-2, a model number of UDA 9107-3 and a model number of UDA 9107-4 according to a mass ratio of (0.8 to 1.2): (0.8 to 1.2): (0.8 to 1.2): (0.8 to 1.2). A mixed antibody of four mALB monoclonal antibodies is specifically combined with a urine microalbumin antigen in a sample to form an antigen-antibody compound, and the antigen-antibody compound has high specificity and high sensitivity; the method has a relatively high detection range, can effectively avoid a hook effect of an ultrahigh-value sample, and can realize rapid and convenient automatic detection.

The invention belongs to the technical field of protein calibration, and particularly relates to an enhanced protein-free confining liquid for protein detection, which comprises the following components: trihydroxymethyl aminomethane, sodium chloride, Tween-20, polyvinyl alcohol, trehalose, EDTA (Ethylene Diamine Tetraacetic Acid) and a polyoxyethylene-polyoxypropylene block copolymer, and sodium chloride and trehalose are matched to provide ions and small molecular compounds to form a stable closed environment. Wherein the trehalose assists in filling and covering small pores of PVDF, the sodium chloride provides ion balance, the EDTA-Na is used for precipitating metal ions, and the Tween-20 assists in repairing the PVDF film. According to the invention, the polyvinyl alcohol and the polyoxyethylene-polyoxypropylene block copolymer are mixed for use, so that non-specific sites on the membrane are blocked while impurity proteins are prevented from being introduced, the sealing effect is achieved, and the problem of false positive or non-specific binding easily caused by the traditional sealing liquid is effectively solved.

The invention provides high-gloss gold-plated and silver-plated steel plate cold rolling lubricating oil and a preparation method thereof.The high-gloss gold-plated and silver-plated steel plate cold rolling lubricating oil is prepared from base oil, modified nanofiller, an extreme pressure agent, an antioxidant and an emulsifier, castor oil phosphate, ricinoleic acid and tris (hydroxymethyl) aminomethane react to obtain a surfactant, the surfactant is used for performing surface activation treatment on layered nano boron nitride and spherical nano aluminum oxide, and the modified nano filler and the extreme pressure agent have a synergistic interaction effect; when the finally obtained rolling lubricating oil is used for rolling a stainless steel plate, after the stainless steel plate is directly annealed without adopting a cleaning and degreasing process, the surface roughness Ra of the obtained stainless steel plate is less than or equal to 0.065 mu m, the glossiness is more than or equal to 500GU, the reflectivity is more than or equal to 90%, the stainless steel plate has excellent high glossiness and mirror surface effect, and the application of the rolling lubricating oil for cold rolling of the steel plate in the field of mirror surface steel is expanded.

The invention discloses a dual-circulation phase-change heat storage material for drilling fluid of a deep high-temperature oil and gas field and a preparation method of the dual-circulation phase-change heat storage material, and belongs to the technical field of petroleum drilling fluid. The preparation method comprises the following steps: (1) mixing and ball-milling expanded graphite and ferroferric oxide nanoparticles, and performing ultrasonic treatment in a solvent to obtain a suspension; and (2) mixing a mixed solution composed of trihydroxymethyl aminomethane and pentaerythritol with the suspension obtained in the step (1), then carrying out ultrasonic treatment and stirring, and finally drying to obtain the product. The preparation method is simple and high in preparation efficiency, and the prepared phase change heat storage material has an adjustable double-peak heat absorption characteristic and high heat conductivity, also has excellent recoverability and real-time monitoring performance, can be applied to cooling of drilling fluid in deep wells and ultra-deep wells, has double-circulation characteristics of heat energy circulation and phase change material circulation, and has wide application prospects. The drilling fluid can stably exist in an underground high-temperature environment, normal development of drilling work is ensured, and the drilling fluid has a wide application prospect.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a preparation method of an aramid fiber / epoxy resin electronic-grade molding compound. The preparation method comprises the following steps: carrying out plasma treatment on aramid fibers, immersing the aramid fibers into a mixed solution of dopamine hydrochloride and a trihydroxymethyl aminomethane hydrochloride buffer solution for oscillation treatment, and then immersing the aramid fibers into an ethanol solution of a silane coupling agent to obtain modified aramid fibers; adding the modified aramid fiber and epoxy resin into a three-roller grinder for grinding and mixing to obtain pre-dispersed aramid fiber; uniformly stirring and mixing aluminum nitride, zinc oxide, epoxy resin and a silane coupling agent to obtain an epoxy resin prepolymer; stirring the pre-dispersed aramid fiber, an epoxy resin prepolymer, a curing agent, an anti-hydrolysis agent and a toughening agent, performing vacuum defoaming, and performing extrusion granulation to obtain the aramid fiber / epoxy resin electronic-grade molding compound. The composite material prepared by the method has the advantages of low moisture absorption, high thermal conductivity and favorable mechanical strength.

This invention discloses a denitrification agent for low-temperature denitrification and its preparation method, belonging to the field of denitrification technology. The denitrification agent is prepared using diatomaceous earth as the matrix framework, compounded with calcium chloride, calcium bicarbonate, chitosan, sodium lignosulfonate, and TRIS (tris(hydroxymethyl)aminomethane). The components synergistically optimize the pore structure. Chitosan and sodium lignosulfonate achieve self-assembly through hydrogen bonding and electrostatic attraction. Nitrogen oxides are removed through a dual action of alkaline absorption and electrostatic adsorption. The TRIS can be regenerated and reused after alkali washing. This invention's denitrification agent solves the problems of high reaction temperature, poor low-temperature activity, low efficiency in removing low-concentration nitrogen oxides, and easy ammonia escape in traditional SCR denitrification technology, and can meet the requirements for NO removal in flue gas from power plants. x ≤15mg / m 3 It has ultra-low emission indicators, and features excellent low-temperature activity, high denitrification efficiency, and recyclability. It is suitable for denitrification treatment of low-temperature flue gas in power plants, etc.

The application discloses a kind of composite super-hydrophobic paper based on alkyl ketene dimer and metal polyphenol network and preparation method thereof, belong to functional paper-based material field.The method is first immersed in 0.25%~5% alkyl ketene dimer emulsion in cellulose paper, is dried at 90~110 DEG C and is cured 48-96h to prepare modified paper;Then, the pH is 8.0-9.0 of tris-hydroxymethyl aminomethane hydrochloride buffer solution, hydrochloric acid dopamine is dissolved in the buffer solution to form dopamine solution, and the concentration is 0.25~20mg / mL of metal ion solution;Finally, the modified paper is immersed in dopamine solution and metal ion solution in turn, and is dried to obtain composite super-hydrophobic paper.The obtained composite super-hydrophobic paper uses cellulose paper-based material as substrate, and hydrophobic layer and metal polyphenol network layer are formed on the surface in turn, the composite paper has super-hydrophobic performance, water barrier performance and photo-thermal response performance, the preparation process is simple, and is suitable for waterproof packaging, self-cleaning surface, anti-icing and deicing and photo-thermal antibacterial and other fields.

Chemical compositions and / or mixtures that allow nucleic acid to remain stable at ambient temperatures. The disclosed technology includes a solution and manufacturing methods thereof. The solution includes a chelating agent, a buffering agent, and a salt. The solution is configured to protect RNA and / or an RNA-based vaccine added to the solution and prevents or reduces degradation of the RNA and / or the RNA-based vaccine for a duration of 2 to 180 days over a temperature range of −20 degrees C. to +38 degrees C. The chelating agent can comprise ethylenediaminetetraacetic acid (EDTA). The buffering agent can comprise tris(hydroxymethyl)aminomethane (TRIS). The salt can comprise NaCl. The solution is configured to preserve an injectable mRNA vaccine added to the solution, and the solution is safe for injection into mammals.

The invention relates to the technical field of battery materials, and discloses a tin bismuth-nitrogen carbon composite material, a preparation method and application thereof, the preparation method comprises the following steps: S1, Bi2Sn2O7, dopamine hydrochloride and tris (hydroxymethyl) aminomethane are subjected to an oxidation self-polymerization reaction in an aqueous solution, and a solid precursor containing Bi2Sn2O7 (at) PDA is obtained after purification treatment; and S2, calcining the precursor containing the Bi2Sn2O7 (at) PDA in an inert reducing atmosphere to obtain the tin bismuth-nitrogen carbon composite material. The tin bismuth-nitrogen carbon composite material is good in sodium storage capacity and high in long-cycle stability.

The invention relates to a preparation method and application of nitric oxide gas release hydrogel for chronic wound repair of diabetes mellitus, and belongs to the technical field of biomedical materials. According to the invention, hyaluronic acid is modified by tris (hydroxymethyl) aminomethane with mechanical properties and structural stability, so that the stability of the hydrogel is improved, and the problem that traditional hydrogel is fragile and easy to collapse is solved; the epsilon-polylysine is introduced, so that the hydrogel has a sterilization effect, and infectious bacteria at chronic wounds can be efficiently sterilized; nitric oxide donor small molecules are introduced into hydrogel, and on-demand release in a pathological environment is realized by combining a high active oxygen response mechanism; through dynamic inclusion of the hollow meso-porous silicon-selenium hybrid nanostructure and cyclodextrin, the drug loading efficiency and release stability of the nanoparticles are further improved, and the nanoparticles are endowed with good responsiveness, controllability and synergistic function. The prepared nitric oxide gas release hydrogel can significantly accelerate healing of chronic wound surfaces of diabetes, the preparation process is mild, simple and convenient, and large-scale production is easy.

The application relates to a composite nanofiber membrane and a preparation method and application thereof, and belongs to the technical field of wearable electromagnetic shielding materials. The preparation method comprises the following steps: dissolving polyacrylonitrile in a solvent, spinning, and obtaining a polyacrylonitrile nanofiber membrane; then immersing the polyacrylonitrile nanofiber membrane in a tris-hydroxymethyl aminomethane hydrochloride solution containing dopamine; then immersing the dopamine-coated fiber membrane in a mixed solution containing a copper salt or a silver salt, and then immersing the dopamine-coated fiber membrane in a reaction solution, so as to obtain a modified nanofiber membrane; then spraying a dispersion liquid containing a conductive filler on the modified nanofiber membrane, so as to obtain a conductive filler modified nanofiber membrane; and finally dissolving polyurethane in a solvent, spinning the conductive filler modified nanofiber membrane as a receiver, and obtaining a composite nanofiber membrane. The composite nanofiber membrane has excellent electromagnetic shielding performance, directional sweat-removal capability, air permeability, light-heat conversion capability, antibacterial property, mechanical strength and flexibility.

The invention relates to a method for preparing a structural color pattern by using a melanin photon material, and belongs to the technical field of structural colors. The method comprises the following steps: S1, under an alkaline condition, carrying out a reaction on PS microspheres and dopamine hydrochloride in a tris (hydroxymethyl) aminomethane-hydrochloric acid buffer solution, and centrifuging to obtain PS (at) PDA microspheres; s2, the PS (at) PDA microspheres are prepared into PS (at) PDA microsphere dispersion liquid, the PS (at) PDA microsphere dispersion liquid is dropwise added to the surface of a silica gel plate, and PS (at) PDA structural color pellets are obtained through drying treatment; and S3, the PS-coated PDA structural color pellets are prepared into PS-coated PDA structural color pellet dispersion liquid, atomization deposition is conducted through a mask technology, and a structural color pattern is obtained. By regulating and controlling the particle size of the PS microspheres and the thickness of the PDA shell layer, the structural color material with uniform color and high color visibility and saturation can be prepared, and finally the preparation of the full-chromatographic structural color covering the whole visible spectrum area is realized.

A process for producing oxide particles coated with amino groups comprises the following steps: introducing a plurality of first LLZO particles and methanol into a wet mixer for mixing to form a first slurry; then introducing a tris(tris(hydroxymethyl)aminomethane) material and a tris(hydroxymethyl)aminomethane hydrochloride into the wet mixer for grinding and stirring to form a second slurry and to cause an outer surface of each of the first LLZO particles to be coated with a hydroxide ion layer; then introducing a dopamine hydrochloride into the wet mixer for mixing to form a third slurry and to cause a dopamine layer to be coated on an outer surface of the hydroxide ion layer on each of the first LLZO particles. A CTAB surfactant (cetyltrimethylammonium bromide) is added to the third slurry.

The invention provides a method for preparing trihydroxymethyl aminomethane by a trickle bed process. According to the method disclosed by the invention, Tris is prepared by hydrogenation of trihydroxymethyl nitromethane, continuous improvement of a trihydroxymethyl nitromethane hydrogenation process is realized by utilizing an adiabatic trickle bed process, and the process adopts a specific hydrogen-alcohol ratio (molar ratio of hydrogen to trihydroxymethyl nitromethane) and specific reaction pressure; the reaction temperature and the gas phase flow velocity in the reactor are controlled by internal gas phase heat extraction, the heat extraction efficiency is ensured, the good Tris yield is also ensured, the THNM conversion rate reaches 100%, the Tris selectivity reaches 90% or above, the product purity is high, and the industrial practicability is good.

The invention aims to provide a preparation method and application of a copper sulfide-reduced graphene oxide composite material. The preparation method comprises the following steps: mixing copper chloride and tris (hydroxymethyl) aminomethane to obtain a first mixture, adding a graphene oxide aqueous solution into the first mixture to obtain a second mixture, adding alkali liquor into the second mixture, and then adding thiourea for reaction to obtain a copper sulfide / graphene oxide composite material; and preparing a hydrazine hydrate aqueous solution, mixing the hydrazine hydrate aqueous solution and the copper sulfide / graphene oxide composite material, and carrying out a reduction reaction at a certain temperature. The copper sulphide-reduced graphene oxide composite material can effectively increase reversibility of a phase inversion reaction, and the cycle performance of the composite material can be remarkably improved while the capacity performance is improved.

The invention discloses a method for preparing a molybdenum dioxide-molybdenum carbide heterostructure material through an in-situ carbonization method and application of the molybdenum dioxide-molybdenum carbide heterostructure material. A molybdenum source and dopamine hydrochloride are self-assembled in a trihydroxymethyl aminomethane buffer solution with the pH being 8.5 to form a precursor, after centrifugation, cleaning and drying, gradient heating carbonization is conducted in an inert atmosphere, and the molybdenum dioxide-molybdenum carbide heterostructure material is obtained. Molybdenum dioxide and molybdenum carbide in the obtained material are tightly compounded in a nanocrystalline form to form a hierarchical porous structure, the material can be used as a multifunctional modification layer of a polypropylene (PP) diaphragm in a lithium-sulfur battery, and the specific structure and interface electron enhancement effect of the material are utilized to improve the performance of the lithium-sulfur battery. The adsorption and catalytic conversion kinetics of the lithium polysulfide intermediate can be effectively improved, so that the comprehensive electrochemical performance of the lithium-sulfur battery is improved. The method is simple in process and low in cost, and a new strategy is provided for design of a high-performance energy storage material.

The invention discloses a thermosetting insulating thin-coating encapsulating material for the electronic industry, and belongs to the technical field of insulating encapsulating materials, a modified curing agent in the raw materials of the encapsulating material is prepared from furan derivatives containing siloxy and maleic anhydride through Diels-Alder reaction; the accelerator is an isocyanate modified imidazole compound, the modified curing agent and the accelerator can be stably stored at normal temperature, acid anhydride and imidazole groups can be protected at normal temperature, the modified curing agent and the accelerator do not need to be prepared at present, the applicability is good, and the cost is low. Imidazole, isocyanate and anhydride compounds capable of participating in curing are formed through reverse reaction and decomposition in the high-temperature curing process and act together with tris (hydroxymethyl) aminomethane, multiple curing reactions are carried out synchronously, the curing process is promoted synergistically, and the curing speed is increased.

The invention discloses a preparation method of electronic-grade tris (hydroxymethyl) aminomethane, which comprises the following steps: tris (hydroxymethyl) aminomethane is prepared into an aqueous solution, the aqueous solution passes through a chromatographic column, the filler of the chromatographic column is chelate resin or cation exchange resin, and the chelate resin or cation exchange resin is subjected to transformation pretreatment by using ammonia water before being filled; the obtained tris (hydroxymethyl) aminomethane solution is subjected to circulating filtration through a three-stage membrane module filtration system; adding a chelating agent to carry out chelating concentration treatment, and then concentrating to remove part of water; carrying out gradient cooling crystallization on the sample; and sequentially centrifuging and drying the cooled and crystallized trihydroxymethyl aminomethane solution to obtain the electronic-grade trihydroxymethyl aminomethane. The metal ion content of the finally obtained trihydroxymethyl aminomethane is 10 ppb or below, after further treatment, the metal ion content can be controlled to 1 ppb or below, operation is easy, and industrial production is facilitated.

The invention relates to the technical field of polyurethane sponge, in particular to composite sponge for seawater desalination and a preparation method of the composite sponge. Comprising the following steps: S1, pretreating sponge; s2, putting the pretreated sponge, dopamine and lithium salt into a tris (hydroxymethyl) aminomethane hydrochloride buffer solution, and carrying out self-polymerization reaction; s3, soaking the sponge modified by polydopamine-lithium chloride in an ethanol solution of acidified carbon nanotubes for ultrasonic treatment; and S4, spraying the n-hexane mixed solution of polydimethylsiloxane on the peripheral area of the side surface of the acidified carbon nanotube modified sponge, and curing to obtain the multifunctional composite sponge. Through the bionic micro-nano structure design, the material is endowed with the dynamic salt-resistant characteristic, the problem of performance degradation caused by salt crystallization blockage of a traditional evaporator is solved, and the service life of equipment is remarkably prolonged.