1449 results about "Dimethyl sulfoxide" patented technology

The present invention discloses a CMO / SO / BVO photoanode and a preparation method and application thereof, and relates to the field of photoelectrochemical technology. The method comprises the following steps in sequence: electrodepositing a BiOI film on a substrate material, and then dripping a dimethyl sulfoxide solution containing vanadium acetylacetonate to obtain a BVO electrode; placing in a NaOH solution containing tetraethyl orthosilicate to obtain a SO / BVO electrode; placing in a CoMoO4 precursor solution, hydrothermally reacting, calcining, and obtaining a CMO / SO / BVO photoanode. The CMO / SO / BVO of the present invention exhibits superior photocurrent and charge separation efficiency compared to the CMO / BVO photoanode under 1.23V vs.RHE conditions. The present invention solves the problem of poor photoelectrochemical performance of the photoanode in the prior art.

The invention discloses nano-porous aerogel based on carboxymethyl chitosan as well as a preparation method and application of the nano-porous aerogel, and belongs to the technical field of biomass-based aerogel. The aerogel is prepared from the following raw materials in parts by weight: 2.5 parts of deionized water, 0.075 part of carboxymethyl chitosan (CMC), 0.0075 to 0.0225 part of carboxylated multi-walled carbon nanotubes (C-CNT), 0.01125 part of glutaraldehyde (GA), 0.01 part of poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonic acid) (PEDOT: PSS) and 10 parts of dimethyl sulfoxide (DMSO). According to the preparation method, CM C is used as a matrix, C-CNT is used as an internal conductive material and a strength enhancing material, hydrogel is formed under the action of a cross-linking agent GA, and CMC / C-CNT aerogel is prepared through directional freeze drying; cMC / C-CNT is taken as a substrate, then PEDOT: PSS is dip-coated to obtain CMC / C-CNT / PEDOT: PSS, the CMC / C-CNT / PEDOT: PSS is taken as an external conductive substance, the CMC / C-CNT / PEDOT: PSS and internal C-CNT form a double-conductive network, aerogel with excellent conductive performance and mechanical performance is prepared, the prepared aerogel is used for preparing an aerogel sensor, and the prepared sensor has high mechanical performance and high electrical performance.

The invention discloses a corrosion-resistant polysilsesquioxane modified polyurethane emulsion and a preparation method thereof, and belongs to the technical field of emulsions.The preparation method comprises the steps that gamma-aminopropyltriethoxysilane, namely APTES, is subjected to hydrolytic condensation under the catalysis of tetraethylammonium hydroxide, and POSS is prepared; the preparation method comprises the following steps: carrying out hydrolytic condensation reaction on APTES, synchronously adding phenyltrimethoxysilane in the hydrolytic condensation reaction, forming phenyl-amino difunctional POSS (Polyhedral Oligomeric Silsesquioxane) according to a molar ratio of phenyltrimethoxysilane to APTES of 1: 4, and grafting POSS and graphene oxide GO in dimethyl sulfoxide through amidation reaction to prepare a POSS / GO composite material; dispersing POSS / GO / Zn in the polyurethane prepolymer, adding a curing agent and a solvent, and stirring to form a homogeneous emulsion; through phenyl trapezoid polysilsesquioxane modification and dynamic reversible self-repairing network design, the wear resistance of the coating is improved, microcracks can be closed at the temperature of 60 DEG C, and the maintenance requirement is reduced; laser micro-nano structured base material treatment is combined, the adhesive force is increased to be larger than or equal to 20 MPa, and meanwhile a gamma-butyrolactone low-VOC solvent is adopted.

The present invention relates to increasing and / or maintaining nitrogen content in soil by administration of nitrogen sources particles coated with urease inhibitors. In one embodiment, urease inhibitors are dispersed in an improved organo liquid delivery system at concentration levels of 60-95%. In another embodiment, urease inhibitors were applied in a non-aqueous, organo liquid delivery system coating nitrogen sources particles utilizing simple blending equipment at temperatures of 20°-70° C. Another embodiment discloses dry, flowable nitrogen sources coated with a urease inhibitor which can be administered directly to the soil, to a dry natural and / or a manmade fertilizer or to a liquid fertilizer which provides for the reduction of nitrogen loss from the soil. In another embodiment, a composition of urea and <0.2% dimethyl sulfoxide improves the crush resistance of the urea particles.

The invention discloses a perovskite active layer film, a preparation method thereof and a perovskite solar cell, and belongs to the field of photovoltaic technology. The preparation method of the perovskite active layer film comprises the following steps: S1, mixing a perovskite active material and a solvent to obtain a perovskite precursor solution; the solvent comprises a first solvent which is a mixed solvent of N-methyl-2-pyrrolidone, dimethyl sulfoxide and N, N-dimethylformamide, and the first solvent, the dimethyl sulfoxide and the N, N-dimethylformamide are sequentially mixed according to the volume ratio of (1-10): (1-8): 100; and S2, coating the perovskite precursor solution on the surface of a substrate, carrying out vacuum flash evaporation, and then carrying out heating treatment to obtain the perovskite active layer film. The DMSO solvent in a specific proportion is introduced into the precursor solvent, and the proportion of the three solvents is controlled, so that growth of crystal grains in the perovskite active layer thin film can be obviously promoted, the perovskite crystal grain size and the crystal grain quality are improved, and the photoelectric conversion efficiency of the perovskite solar cell is further improved.

The invention relates to the technical field of biochemical engineering, in particular to a method for preparing chiral alpha-trifluoromethyl alcohol by using imine reductase AtRedAm, trifluoromethyl ketone is reduced into corresponding chiral trifluoromethyl alcohol at an excellent conversion rate by using the imine reductase AtRedAm, and enantioselectivity is high. The reaction depends on an NADPH (Nicotinamide Adenine Dinucleotide Phosphate) coenzyme circulation system, 10% dimethyl sulfoxide is used as a reaction cosolvent, the reaction is carried out in a 100mM (pH = 7.5) phosphate buffer solution for 16 hours, the highest molar conversion rate reaches 99%, and the highest optical purity reaches 95%.

The present invention provides a carbon fiber reinforced silicon carbide ceramic and a preparation method thereof, belonging to the technical field of silicon carbide ceramics; the preparation method includes steps of preparing functional carbon fibers, preparing modified silicon carbide microspheres, preparing a mixture, forming and calcining; the step of preparing modified silicon carbide microspheres is as follows: placing silicon carbide in an ethanol solution, adding sodium dodecyl aminopropionate for ball milling treatment, after the ball milling ends, filtering and drying to obtain ball milled silicon carbide; placing the ball milled silicon carbide in dimethyl sulfoxide, stirring evenly, adding modified sodium alginate and hydroxyethyl cellulose, heating to 70 - 74 °C, adding tetrabutylammonium bromide, carrying out a heat preservation reaction for 10.0 - 11.5 h, after the reaction ends, filtering, washing and drying to obtain modified silicon carbide microspheres; the ceramic product prepared by the present invention has high strength performance and toughness, a low thermal expansion coefficient, and excellent high temperature oxidation resistance.

The invention belongs to the field of preparation of medical intermediates, and particularly relates to a preparation method of an On-DNA sulfinic acid structure compound. The method for preparing the On-DNA sulfinic acid structure compound comprises a step of oxidizing On-DNA thiol (phenol) into the On-DNA sulfinic acid structure compound under alkaline and heating or illumination conditions, a solvent used in the reaction step is a mixed solution of water, dimethyl sulfoxide, N, N-dimethylformamide, acetonitrile, ethanol or tetrahydrofuran, the reaction temperature is not more than 80 DEG C, and the reaction time is not more than 2 hours. And the illumination wavelength ranges from 365 nanometers to 535 nanometers. The On-DNA sulfinic acid structure compound obtained in the invention can be directly used for constructing a structure compound with a sulfonyl group, the reaction condition is mild and convenient, a new method and a new idea are provided for construction of a DNA coding compound library, and the On-DNA sulfinic acid structure compound has a very good application prospect in lead drug development.

The invention provides a preparation method of a liner-free all-composite pressure vessel. The preparation method comprises the following steps: compounding polyvinyl alcohol, dimethyl sulfoxide and polyvinylpyrrolidone into a core mold adhesive according to a preset proportion; the preparation method comprises the following steps: grading a filler by adopting various glass beads with different mesh numbers and chopped glass fibers according to a specific proportion, and then blending with a core mold adhesive according to a specific proportion to prepare a sand core material; a sand core material is pressed into the pretreated core mold, the surface of the sand core material is scraped to be flat after the sand core material is tamped, and core mold adhesive is coated for mold closing; the closed core mold is placed in a curing oven for curing operation, after curing is completed, natural cooling is conducted, demolding is conducted, and a core mold is obtained; uniformly winding a layer of carbon fibers on the surface of the core mold, and dissolving the core mold in a normal-temperature water area after curing; and continuously winding the carbon fibers by using the carbon fiber body as rigidity attachment until the carbon fibers are completely wound to obtain the liner-free pressure vessel. According to the method, the mechanical behavior requirement of an original core mold is greatly reduced, the dead weight of the core mold can be effectively reduced, and good manufacturability is achieved.

The invention discloses a bag-pasting-preventing self-cleaning dust-removing filtering material and a preparation technology thereof, and relates to the technical field of dust-removing filtering materials.The preparation technology comprises the following steps that fluorine-containing alkenyl monomers, allyl monomers, fibers and an initiator are mixed in dimethyl sulfoxide, and dispersion liquid is obtained; and coating the surface of a needled felt with the dispersion liquid, and baking to obtain the dust removal filtering material. The preparation method comprises the following steps: mixing an alkenyl fluorine-containing monomer, a propenyl monomer and fibers to prepare a dispersion liquid, coating the dispersion liquid on the surface of a needled felt, and carrying out a baking reaction to form the dust removal filtering material deposited with a fluorine-containing coating, so that the surface energy of the filtering material is remarkably reduced, and the filtering material is endowed with good surface moisture condensation resistance and dust stripping resistance; bag pasting caused by the effects of smoke humidity, dust humidity and the like is effectively avoided, the self-cleaning capacity is achieved, and the service life is prolonged. And the loading of the high-strength fibers on the surface of the needled felt is beneficial to improving the mechanical strength and stability of the prepared filtering material.

The invention relates to the technical field of stem cell injections, in particular to a human umbilical cord mesenchymal stem cell injection and a preparation method thereof. The cell cryoprotectant comprises the following components: a cell cryoprotectant and P6-generation human umbilical cord mesenchymal stem cells. By selecting P6-generation human umbilical cord mesenchymal stem cells, the capacity of secreting hepatocyte growth factors (HGF) can be improved; the cell cryoprotectant contains 6-9wt% of dimethyl sulfoxide and a certain amount of human serum albumin, can better protect cells and maintain the motility rate and biological functions of the cells, and is more beneficial to preparation of cryopreserved human umbilical cord mesenchymal stem cell injection. The P6-generation human umbilical cord mesenchymal stem cells are obtained by culturing a culture medium containing fetal calf serum, and the ability of the injection to repair liver injury can be improved.

The invention discloses a preparation method of polyvinyl alcohol-based electromagnetic shielding conductive hydrogel. The preparation method comprises the following steps: (1) preparing a high-concentration dimethyl sulfoxide aqueous solution; adding polyvinyl alcohol into the dimethyl sulfoxide aqueous solution, heating and stirring to completely dissolve the polyvinyl alcohol to obtain a mixed solution; (2) putting the mixed solution after standing into a mold, and freezing at low temperature to obtain PVA gel; (3) an electrolyte salt solution is prepared, and the electrolyte salt solution contains low-concentration dimethyl sulfoxide; and placing the PVA gel in an electrolyte salt solution, and carrying out ion exchange to obtain the polyvinyl alcohol-based electromagnetic shielding conductive hydrogel. The polyvinyl alcohol-based electromagnetic shielding conductive hydrogel prepared by the method has high transparency, strength and ionic conductivity, the light transmittance reaches up to 75.2%, and the compressive strength reaches up to 2.97 MPa when the strain is 80%; the ionic conductivity can reach 10.34 mS / cm; meanwhile, the effective electromagnetic shielding effectiveness (gt; gt) can still be kept at the low temperature of-60 DEG C for more than 60 hours; 30 dB).

The invention discloses a preparation method of a raspberry-derived exosome loaded with neroli essential oil. The preparation method comprises the following steps: preparing raspberry fruits into homogenate; centrifuging, collecting supernate, adjusting the pH value to 4.07.5, standing, and centrifuging again; taking supernate, adjusting the pH value to 7.2-7.4, adding polyethylene glycol, standing, centrifuging, collecting precipitate, and carrying out resuspension dispersion; performing microfiltration to obtain supernate, and combining electrophoresis dialysis and ultrafiltration concentration to obtain the high-purity raspberry exosome. And diluting the exosome, adding the diluted exosome into a dimethyl sulfoxide solution containing neroli essential oil, carrying out water bath stirring, carrying out ultrafiltration centrifugation, and taking a clear liquid to obtain the exosome loaded with the neroli essential oil. Efficient separation and purification of the raspberry exosome are achieved by applying an isoelectric precipitation technology, then the neroli essential oil is wrapped in the exosome, the stability of the essential oil is improved, the action time is prolonged, meanwhile, the neroli essential oil and active ingredients of the exosome generate a synergistic effect, and the antioxidant activity is jointly enhanced.

The invention discloses a liquid metal-hydrogel composite radiation protection material and a preparation method and application thereof.The preparation method comprises the steps that indium, tin and bismuth are sequentially put into a flask from low melting point to high melting point to be mixed, and glycerin is added for immersion; placing the mixture in an argon atmosphere, and stirring by using a heating type magnetic stirrer; taking out the spherical liquid metal particles from the glycerol, and finally washing and drying to obtain liquid metal alloy particles; preparing a PVA (polyvinyl alcohol)-H2O solution with the mass fraction of 15% and a PVA-DMSO (dimethyl sulfoxide) solution with the mass fraction of 15%; and a PVA-H2O solution, a PVA-DMSO solution and the liquid metal alloy particles are stirred and mixed according to the mass ratio, the mixed solution is subjected to ultrasonic treatment and then poured into a mold to be frozen into gel, and the liquid metal-hydrogel composite material is obtained. By combining the advantages of the liquid metal and the hydrogel, excellent biocompatibility, adjustable mechanical property and efficient radiation shielding capability are realized, and the hydrogel can be used as a novel lead-free radiation protection material.

The present invention generally relates to a process for synthesizing a graphene oxide quantum dots-iron phthalocyanine (FePc-GOQDs) nanocomposite with enhanced electrochemical properties, particularly for oxygen reduction reactions (ORR). The process begins by dispersing 500 mg of graphene oxide (GO) in a hydrogen peroxide and deionized water solution in a 1:10 volume ratio, followed by hydrothermal treatment at 180° C. for 8 hours to produce GO quantum dots (GOQDs). The resulting material is freeze-dried to obtain GOQDs powder. Subsequently, 60 mg of GOQDs are combined with 10 mg of iron phthalocyanine (FePc) and 20 mL of dimethyl sulfoxide (DMSO), and the mixture is subjected to microwave irradiation at 500 W and 150° C. for 30 minutes. The resulting composite is rinsed repeatedly with deionized water and ethanol, then dried at 120° C. to yield the FePc-GOQDs nanocomposite. This composite demonstrates superior ORR performance due to strong Fe—O bonding and optimized electronic interactions.

An improved solvent system for the formulation and application of N-alkyl thiophosphoric triamide urease inhibitors. These formulations provide safety and performance benefits relative to existing alternatives and enable storage, transport and subsequent coating or blending with urea based or organic based fertilizers. These formulations are comprised primarily of environmentally friendly aprotic and protic solvents (particularly dimethyl sulfoxide and alcohols / polyols) to stabilize the urease inhibitor.

The invention provides a method for alcoholysis of polyethylene glycol terephthalate, and relates to the technical field of PET degradation. The PET alcoholysis method provided by the invention comprises the following steps: mixing PET, ethylene glycol, a cosolvent and a composite catalyst, and carrying out alcoholysis reaction to obtain bis (hydroxyethyl) terephthalate (BHET). According to the invention, dimethyl sulfoxide is taken as a cosolvent, zinc acetate and 1, 8-diazabicyclo [5.4. 0] undec-7-ene are taken as a composite catalyst, catalysis and solvent effect driving are combined, and ethylene glycol alcoholysis of PET is carried out under the synergistic effect of the composite catalyst and the cosolvent. According to the method, effective decomposition of PET can be achieved at the low temperature (140-155 DEG C) and within the short reaction time (60-100 min), and the yield of BHET is high (66% or above and can reach 80% or above). The method provided by the invention can realize high-efficiency alcoholysis of PET with ethylene glycol.

The invention discloses a perovskite precursor solution, a perovskite solar cell and a preparation method of the perovskite solar cell. The perovskite precursor solution provided by the invention contains a perovskite precursor solute, a perovskite precursor solvent and an additive, the perovskite precursor solute contains lead halide, and further contains at least one of tin halide, formamidine halide, methylamine halide, cesium halide, dimethylamine halide and guanidine halide; the perovskite precursor solvent contains at least one of N, N-dimethyl formamide, dimethyl sulfoxide, N-methyl pyrrolidone, 2-methoxyethanol, valerolactone and acetonitrile, and the perovskite precursor solvent contains at least one of N, N-dimethyl formamide, dimethyl sulfoxide, N-methyl pyrrolidone, 2-methoxyethanol, valerolactone and acetonitrile; the additive contains an organic salt of trifluoromethyl acid. The opening voltage loss is reduced, the filling factor and the photoelectric conversion efficiency of the battery are improved, the precipitation of lead iodide is reduced in the crystallization annealing process, the volatilization of organic cations is inhibited, the non-uniform crystallization is improved, and the stability of the battery is improved.

The invention discloses a tannic acid modified titanium carbide / silver nanowire / aramid nanofiber electromagnetic shielding composite film and a preparation method and application thereof.The preparation method comprises the steps that titanium aluminum carbide powder is added into a mixed solution of lithium fluoride and hydrochloric acid, stirring reaction is performed, ultrasonic treatment is performed to prepare an MXene aqueous dispersion, tannic acid is added into the MXene aqueous dispersion, stirring reaction is performed, and the tannic acid modified titanium carbide / silver nanowire / aramid nanofiber electromagnetic shielding composite film is obtained. Stirring and reacting at room temperature to prepare an MXene-TA dispersion liquid; the preparation method comprises the following steps: dissolving potassium hydroxide and para-aramid chopped fibers in dimethyl sulfoxide, and stirring to obtain an aramid nanofiber dispersion liquid; and the tannic acid modified titanium carbide / silver nanowire composite electromagnetic shielding composite film is prepared from the MXene-TA dispersion liquid, the AgNWs dispersion liquid and the aramid nanofiber. The electromagnetic shielding composite film prepared through the method is not prone to oxidation and good in mechanical performance, and the use stability of an electromagnetic shielding material is effectively improved.

The invention discloses an insulating material with corrosion resistance and a production process thereof, and relates to the technical field of insulating materials. The invention discloses an insulating material with corrosion resistance. The invention discloses a flame-retardant coating which is prepared from the following raw materials in parts by weight: 60 to 80 parts of bisphenol A epoxy resin, 20 to 30 parts of polyether-ether-ketone, 10 to 15 parts of nano aluminum nitride, 5 to 10 parts of boron fiber, 4 to 8 parts of molybdenum disulfide, 3 to 6 parts of poly (p-phenylene benzobisoxazole), 2 to 5 parts of vinyl trimethoxy silane, 20 to 30 parts of dimethyl sulfoxide, 8 to 12 parts of melamine cyanurate, 6 to 10 parts of magnesium aluminum hydroxide, 1 to 3 parts of Chimassorb 944 and 10 to 20 parts of modified polyvinyl alcohol. The coating is prepared from the following components in parts by weight: 20-30 parts of modified cellulose, 8-15 parts of modified cellulose, 3-7 parts of nano-zirconia, 5-10 parts of polysiloxane elastomer and 7-12 parts of fluorine-containing acrylate copolymer. The raw materials of the insulating material have a synergistic effect, and the prepared insulating material not only has conventional electrical insulation, but also has excellent heat resistance, corrosion resistance and the like, integrates hardness, flexibility, flame retardance and self-repairing performance, greatly expands the application range of the insulating material, and provides powerful support for industry development.

The invention provides a dimethyl sulfoxide production parameter control method and system based on reinforcement learning, and relates to the technical field of production parameter control, and the method comprises the steps: obtaining historical process operation data in a dimethyl sulfoxide production process; performing correlation analysis on the historical process operation data, and screening key control variables influencing the yield and the energy consumption; based on the historical process operation data and the key control variables, constructing a digital twinborn simulation model for providing an interaction environment for reinforcement learning; defining a state space, an action space and a reward function, and constructing a dimethyl sulfoxide production parameter control model based on reinforcement learning; based on the reward function and the digital twinborn simulation model, training and optimizing the dimethyl sulfoxide production parameter control model through a PPO algorithm, and outputting an optimal control strategy; and controlling the production parameters of dimethyl sulfoxide according to the optimal control strategy.

The invention relates to a 3D printing preparation method of a high-absorption electromagnetic shielding composite material with a gradient structure. The 3D printing preparation method comprises the following steps: adding Fe3O4 and CNT into a dimethyl sulfoxide solution, fully shaking up, carrying out ultrasonic dispersion treatment, continuously adding TPU particles, continuously mechanically stirring at room temperature, and adding different CNT contents as required to prepare various Fe3O4 / CNT / PU composite ink; sequentially inputting various Fe3O4 / CNT / PU composite inks into a 3D printer, performing extrusion printing in a coagulating bath to obtain a composite frame, soaking and washing the composite frame with deionized water, and performing constant-temperature drying to obtain a composite frame with a porous structure; the composite frame and the high-conductivity flexible MXene film are bonded and cured through a polyurethane solution, and the composite material is obtained. Therefore, the problem of serious secondary electromagnetic radiation pollution caused by the electromagnetic wave (EMW) reflection characteristic of the existing conductive electromagnetic interference shielding composite material is solved.

The invention discloses a method for removing nitrogen dioxide in dimethyl sulfoxide, and particularly relates to a method for removing nitrogen dioxide in a dimethyl sulfoxide crude product in the process of producing dimethyl sulfoxide from dimethyl sulfide, oxygen and nitrogen dioxide. A dimethyl sulfoxide crude product is introduced into the reactor, and the high-purity dimethyl sulfoxide can be separated and recovered from the crude product by circularly and repeatedly blowing off the dimethyl sulfoxide crude product in a closed device through nitrogen. The production method is suitable for a technology for producing dimethyl sulfoxide through nitrogen dioxide liquid phase oxidation, nitrogen dioxide in the crude product dimethyl sulfoxide is removed, the loss amount of nitrogen dioxide in the air stripping treatment process is greatly reduced, the operation process is easy and convenient to control, and the production method is suitable for modification and upgrading of an existing similar dimethyl sulfoxide production technology.

The invention provides a lithium battery diaphragm and a preparation method thereof, and the preparation method comprises the following steps: carrying out a reaction on melamine and terephthalaldehyde in dimethyl sulfoxide to obtain SNW-1COF; the preparation method comprises the following steps: enabling SNW-1COF to react with allyl-1, 3-sultone in acetonitrile, so as to obtain allyl SCOF; the polyarylether benzimidazole, the 2-sulfydryl-5-fluorobenzimidazole, triethylamine and allyl SCOF are subjected to a reaction in a third solvent, and a membrane casting solution is obtained; and applying the membrane casting solution to a base material, and removing the solvent in the membrane casting solution to obtain the lithium battery diaphragm. According to the invention, the OPBI matrix and the propenyl SCOF react to form a covalent cross-linked network, so that the mechanical properties of the diaphragm in the aspects of thermal shrinkage rate, tensile strength, puncture strength and the like and the electrical properties in the aspects of wettability and ionic conductivity are improved.

The invention discloses a composition for resisting porcine viral diarrhea and application of the composition. The composition for resisting porcine viral diarrhea is prepared from the following components in parts by mass: 2 parts of phloretin, 1 part of N-acetyl-D-galactosamine and 100 parts of proline. The composition can further comprise one or more auxiliary materials of absolute ethyl alcohol, propylene glycol, dimethyl sulfoxide, edible oil, water, tween-80, lactose, defatted rice bran, corncob powder, soluble starch, bran, silicon dioxide, montmorillonite, vermiculite, medical stone, zeolite powder, white carbon black and the like. The composition can significantly inhibit the proliferation of PEDV, TGEV and PoRV, and inhibit the infection of PEDV, TGEV and PoRV on cells, and further, the composition can be used for preparing drugs or feed additives for resisting porcine diarrhea diseases caused by viruses such as PEDV, TGEV and PoRV.

The invention relates to a preparation method of propargyl alcohol, and belongs to the technical field of organic chemistry. The reaction formula is as follows: # imgabs0 #; comprising the following steps: (1) taking Z-1, 3-dichloropropene as a raw material, adding dimethyl sulfoxide and solid alkali into an organic solvent, heating, carrying out heat preservation reaction until the content of the Z-1, 3-dichloropropene is less than or equal to 1%, and cooling to room temperature; (2) adding a phase transfer catalyst and water into the reaction liquid obtained in the step (1), heating, and carrying out a heat preservation reaction until an intermediate 3-chloropropyl-2-ene-1-ol is less than or equal to 0.5%; cooling to room temperature; (3) filtering, separating liquid, and adding an extracting agent into a water phase for extraction; and rectifying the extracted organic phase to obtain propargyl alcohol. By controlling the alkaline strength and reaction parameters in the reaction, the production of organic impurity ether compounds can be effectively controlled, the purity and yield of the product are improved, and meanwhile, the reaction time is shortened.

The invention relates to natural dye and green chemical industry, and particularly discloses water-soluble biological indigo blue and a preparation method thereof. The water-soluble biological indigo comprises the following raw material components in parts by weight: 80-90 parts of a biological-based indigo concentrated solution; 0.5 to 1 part of dimethyl sulfoxide; 10 to 15 parts of a solubilizer A; 5-10 parts of a solubilizer B; and 10 to 15 parts of deionized water. According to the invention, the bio-based indigo concentrated solution synthesized by a biological method is used as a raw material, the water-soluble compound is innovatively formed through beta-cyclodextrin inclusion and povidone compounding, and the water-soluble compound has relatively high water solubility; the water solubility of the product is greater than or equal to 50g / L, the stability is excellent, the obtained indigo dye is natural in source, environment-friendly and high in water solubility, secondary pollution of the traditional dye to the environment is avoided, and the indigo dye is suitable for sustainable chemical industry and green dyeing and finishing industries and can be widely applied to the fields of textile dyeing, water-based ink, cosmetic color developing agents, medicines and the like.

The invention relates to a preparation method of an oxygen vacancy-rich bismuth molybdate / bismuth vanadate composite photo-anode and a product and application thereof, and belongs to the technical field of photoelectrocatalysis. The invention discloses a preparation method of an oxygen vacancy-rich bismuth molybdate / bismuth vanadate (Bi2Mo2O9 / BiVO4) composite photo-anode, which mainly comprises the following steps: immersing a fluorine ion-doped tin dioxide (FTO) conductive glass substrate into a Bi < 3 + > ion solution and an I <-> ion solution to form a bismuth oxyiodide (BiOI) film, dropwise adding a dimethyl sulfoxide solution of vanadyl acetylacetonate (VO (acac) 2), and putting into a muffle furnace to prepare the BiVO4 photo-anode. And then vertically immersing into a Bi < 3 + > ion solution and a Mo < 6 + > ion solution, and carrying out annealing treatment in an argon atmosphere to prepare the Bi2Mo2O9 / BiVO4 composite photoanode rich in oxygen vacancies. The Bi2Mo2O9 / BiVO4 material rich in oxygen vacancies is a metal oxide composite photo-anode, the photoelectrocatalysis efficiency can be improved, and hydrogen peroxide (H2O2) can be continuously generated in natural seawater through photoelectrocatalytic oxidation of water for a long time.

The invention belongs to the technical field of thermoelectric materials and functional polymer materials, and particularly relates to thermoelectric hydrogel based on synergistic enhancement of zwitterions and a polar solvent as well as a method and application of the thermoelectric hydrogel. The thermoelectric hydrogel is obtained through the steps that a precursor solution is subjected to a polymerization reaction to form a gel matrix, then the gel matrix is soaked in a soaking solution, potassium ferricyanide / potassium ferrocyanide redox couple is introduced, and the thermoelectric hydrogel is obtained, and the precursor solution is prepared from acrylamide, N-isopropylacrylamide, dimethyl sulfoxide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide and N, N-dimethylformamide. The photoinitiator is prepared by mixing N, N-dimethylformamide, 1-ethyl-3-methylimidazolium tetrafluoroborate, a zwitterionic monomer [2-(methylacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, a cross-linking agent N, N '-methylene bisacrylamide, a photoinitiator and deionized water. The thermoelectric hydrogel prepared by the invention has high mechanical strength, high ductility and high Seebeck coefficient, and has better temperature resistance.

The invention provides a method for separating boron isotopes by using ferroferric oxide / resin microspheres, which comprises the following steps: in a chromatographic column, taking a boric acid-monosodium borate aqueous solution with the pH value of 6-7 as an adsorption solution, and taking a sodium hydroxide aqueous solution with the pH value of 10-11 as a desorption solution to obtain a 10B-rich boric acid aqueous solution; the preparation method of the microspheres comprises the following steps: (1) adding dimethyl sulfoxide to swell polystyrene-divinylbenzene resin microspheres, adding concentrated sulfuric acid to treat until the sulfonation rate is 0.3-0.4 mmol / g, washing with water, treating with an ammonium chloride aqueous solution, washing with water, drying in vacuum, spraying with a ferric chloride-ferrous chloride aqueous solution, evaporating in vacuum to remove part of water, and introducing ammonia-containing nitrogen flow to treat to obtain polystyrene-divinylbenzene resin microspheres; and washing with water, grinding the surface, treating with a sodium hydroxide aqueous solution and washing with water. The method is simple in separation operation, easy to implement and high in efficiency, and has a certain application prospect; the chromatographic column is relatively stable in performance, reproducible and relatively long in service life.