158 results about "Tetramethylethylenediamine" patented technology

The invention discloses photocuring conductive hydrogel as well as a preparation method and application thereof. According to the invention, methacryloylethyl sulfobetaine (SBMA), acrylic acid (AA) and hydroxyethyl methylacrylate (HEMA) are used as comonomers, deionized water is used as a solvent, N, N '-methylenebisacrylamide (MBAA) is used as a cross-linking agent, ammonium persulfate (APS) is used as an initiator, tetramethylethylenediamine (TEMED) is used as an accelerator, and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methyl propiophenone (Irgacure2959) is used as a photoinitiator; the conductivity is improved by adding an ionic compound potassium chloride (KCl), and the photocuring conductive hydrogel is prepared in a free radical polymerization manner by adopting an LED-UV curing box. The conductive hydrogel disclosed by the invention has the characteristics of good adhesion property, conductivity, mechanical property and the like, and has wide application in the fields of wearable strain sensors and other flexible electronics.

The invention provides a gel composite adsorbent with a foaming structure as well as a preparation method and application thereof, and the preparation method comprises the following steps: S1, dissolving acrylamide powder in deionized water, and stirring to obtain a solution A; s2, dissolving sodium alginate in the solution A for thickening to obtain a solution B; s3, transferring the solution B into an ice-water bath; s4, adding N, N-methylene bisacrylamide into the solution B, stirring until the N, N-methylene bisacrylamide is completely dissolved, then adding N, N, N ', N'-tetramethylethylenediamine, and stirring until the N, N, N ', N'-tetramethylethylenediamine is uniform to obtain a solution C; s5, adding ammonium persulfate into the solution C, and stirring until the ammonium persulfate is completely dissolved to obtain a solution D; s6, the solution D is poured into a mold and then vacuumized to form gel, and a hydrogel sample is obtained after gel forming; s7, drying the hydrogel sample, and then soaking the dried hydrogel sample in a salt solution to obtain a soaked gel material; and S8, drying the soaked gel material to obtain the finished product composite adsorbent.

The invention discloses a photonic crystal hydrogel-based thermochromic intelligent window material as well as a preparation method and application thereof. The photonic crystal hydrogel-based thermochromic intelligent window material is obtained by filling a three-dimensional photonic crystal structure with a temperature-sensitive hydrogel prepolymerization solution and then curing the three-dimensional photonic crystal structure; the preparation method comprises the following steps: adding a temperature-sensitive monomer, modified cellulose and a cross-linking agent into deionized water, carrying out ultrasonic dispersion, stirring under an ice bath condition until the materials are completely dissolved, adding an initiator, stirring until the materials are dissolved, adding N, N, N ', N'-tetramethylethylenediamine, and uniformly stirring to obtain the temperature-sensitive hydrogel prepolymer. The photonic crystal hydrogel-based thermochromic intelligent window material prepared by the invention can regulate and control the window transmittance in real time according to the environment temperature, and has a sensitive thermochromic effect and excellent infrared shielding performance.

The invention belongs to the technical field of textile dyeing and finishing, and particularly relates to a long-acting hydrophilic, soft, fluffy and washable silicone oil composition as well as a preparation method and application thereof. The silicone oil composition is prepared from the following raw materials in parts by mass: 20 parts of modified silicone oil, 0.5 to 2.5 parts of anionic surfactant, 0.5 to 2 parts of nonionic surfactant, 0.1 to 1 part of polyhexamethylene biguanide hydrochloride, 0.2 to 0.5 part of glacial acetic acid and 76 to 79 parts of water, the modified silicone oil is prepared from the following raw materials: octamethylcyclotetrasiloxane, tetramethylethylenediamine, secondary aminated polyether amine, allyl epoxy polyether, polyether amine, allyl glycidyl ether, isopropanol, diethylene glycol butyl ether, an end-capping reagent and a catalyst. The silicone oil composition provided by the invention can endow a fabric with a long-acting hydrophilic effect, excellent hand feeling, low yellowing and washability; and the dye has excellent stability, is safe and stable to use, and does not influence the colored light of the dyed fabric.

The invention discloses a self-adaptive hydrogel coupling agent as well as a preparation method and application thereof, belongs to the field of medical instruments, and particularly relates to a preparation method of the self-adaptive hydrogel coupling agent. The preparation method comprises the following steps: dissolving a main monomer, a functional monomer, a molecular weight regulator and a reinforcing filler in sterilized deionized water under dark and sterile conditions, carrying out a free radical polymerization reaction under the action of a persulfate solution and tetramethylethylenediamine, and carrying out dialysis and sterilization treatment to obtain the self-adaptive hydrogel coupling agent. The self-adaptive hydrogel coupling agent prepared by the invention eliminates tissue deformation caused by probe pressurization, significantly improves the accuracy of measurement of the actual distance of a target by ultrasound in an operation, and meanwhile, the self-adaptive hydrogel coupling agent is good in biocompatibility, can be sterile, is convenient to operate, and is suitable for open or endoscopic surgical wounds.

The invention relates to an intelligent composite material diaphragm as well as a preparation method and application thereof. The intelligent composite material diaphragm comprises a shape memory polymer foam skeleton and a gel electrolyte filled in the shape memory polymer foam skeleton, the shape memory polymer foam skeleton is prepared from the following raw materials: epoxy resin and a D-230 curing agent; the gel electrolyte is prepared from the following raw materials: N-isopropylacrylamide, acrylamide, N, N '-methylene bisacrylamide, ammonium persulfate, tetramethylethylenediamine and a lithium salt solution. The intelligent composite material diaphragm can perform real-time response according to the temperature change in the working process of the battery, adjust the ionic conductivity to control the output power of the battery, provide over-temperature protection, have an automatic thermal protection function, further have a function of inhibiting the growth of lithium dendrites, can prolong the service life of the battery, and is suitable for popularization and application. And the battery is especially suitable for battery application scenes with high energy density and high safety requirements.

The invention provides a preparation method of an insecticide synergistic responsive release delivery system, and belongs to the technical field of insecticides. Chlorantraniliprole insecticide is dissolved in an acetone solvent containing Tween 80 to form a drug-carrier complex; then polymerizing the N-isopropylacrylamide temperature-sensitive monomer under the action of an ammonium persulfate and tetramethylethylenediamine initiation system to form a temperature-responsive hydrogel matrix; four key parameters including the optimal molar ratio, the optimal embedding temperature, the optimal embedding time and the optimal phase change temperature control precision of an amido hydrophilic group and an isopropyl hydrophobic group are calculated by applying a double-layer game model, and a drug-carrier complex is embedded into a hydrogel matrix through a physical embedding effect to construct a three-layer nested delivery structure; the technical problem that the pesticide effect utilization rate is low due to the fact that the pesticide lacks an accurate temperature-responsive release control mechanism in environmental application is solved.

The invention relates to the technical field of gel material preparation, in particular to a bio-based gel material for dangerous chemical leakage disposal and a preparation method thereof.The preparation method comprises the steps that gelatin and deionized water are added into a reaction container, a gelatin solution is obtained under the preset dissolution condition, alkaline protease is added into the gelatin solution for an enzymolysis reaction, and a gelatin solution is obtained; a modified gelatin solution is obtained; the preparation method comprises the following steps: adding a phytic acid-chitosan compound and magnesium-aluminum layered double hydroxide into dispersion equipment, and obtaining a composite inorganic matter dispersion liquid under a preset dispersion condition; adding the modified gelatin solution, the composite inorganic substance dispersion liquid, polyethylene glycol and phase change microcapsules into a mixing reactor, and obtaining a premixed solution under a preset mixing condition; sequentially adding an initiator, a cross-linking agent and tetramethylethylenediamine into the premixed liquid, and performing cross-linking reaction under preset cross-linking conditions to obtain a bio-based gel initial product. The plugging efficiency of the bio-based gel material on dangerous chemical leakage is improved.

The invention discloses preparation and application of natural biomass water retention gel for water collection and retention of arid soil, and the preparation method comprises the following steps: dissolving sodium alginate and carboxymethyl cellulose in deionized water, and then adding lithium chloride, an N-isopropylacrylamide monomer and N, N '-dimethyl diacrylamide to obtain a mixture; foaming the mixture with Ar gas, then adding N, N, N ', N'-tetramethylethylenediamine, a polymerization accelerator and ammonium peroxide as initiators, and polymerizing to obtain mixed gel; dropwise adding the mixed gel into a calcium chloride aqueous solution through a microfluidic method to obtain hydrogel beads, washing and drying to obtain the natural biomass water-retaining gel. The natural biomass water retention gel contains a three-dimensional porous structure, enhances adsorption-desorption kinetics, and effectively inhibits aggregation of hygroscopic salt-LiCl particles in a hydration process, so that good water absorption performance and cycling stability are realized, water vapor can be extracted from arid climate, and water can be effectively captured from atmosphere.

The invention discloses SDS-PAGE polyacrylamide gel prepared by a one-step method, the SDS-PAGE polyacrylamide gel comprises a separation gel and a concentration gel, the separation gel comprises the following components: a Tris-HCl buffer solution, acrylamide, N, N '-methylene bisacrylamide, a trihalide compound, lauryl sodium sulfate, an ammonium persulfate solution, a glycerin aqueous solution, tetramethylethylenediamine and water; the concentrated gel is prepared from the following components: a Tris-HCl buffer solution, acrylamide, N, N '-methylene bisacrylamide, lauryl sodium sulfate, an ammonium persulfate solution, tetramethylethylenediamine and ultrapure water. The polyacrylamide gel provided by the invention can be used for preparing gel by a one-step method, so that a sample loading hole is clearer and more visible, and a clear protein band can be presented by irradiating for 60-90 seconds under 300 nm ultraviolet after electrophoresis.

The invention relates to the technical field of high polymer chemical polymerization, in particular to sodium alginate-based polyacrylamide hydrogel and a preparation method thereof. The sodium alginate-based polyacrylamide hydrogel is prepared from the following components in parts by mass: 10 to 20 parts of acrylamide, 10 to 15 parts of sodium alginate, 3 to 7 parts of modified montmorillonite, 1 to 3 parts of nano titanium dioxide, 0.3 to 0.9 part of anhydrous calcium chloride, 0.1 to 0.5 part of a cross-linking agent, a photoinitiator and tetramethylethylenediamine. The invention provides a sodium alginate-based polyacrylamide hydrogel and a preparation method thereof, and aims to solve the problems of poor mechanical properties and poor heat resistance of sodium alginate-acrylamide composite gel in related technologies.

The invention relates to the technical field of oilfield chemistry, in particular to a clay stabilizer containing dihydroxyl quaternary ammonium salt and a preparation method thereof, and the preparation method of the clay stabilizer containing dihydroxyl quaternary ammonium salt comprises the following steps: mixing required amounts of tetramethylethylenediamine, 3-chloro-2-hydroxypropyl trimethyl ammonium chloride and a hydrogen bond donor for reaction to obtain the clay stabilizer containing dihydroxyl quaternary ammonium salt. And after the reaction is ended, obtaining the clay stabilizer containing the dihydroxyl quaternary ammonium salt. The clay stabilizer containing dihydroxyl quaternary ammonium salt is high in charge density and remarkable in clay expansion prevention effect; the fabric has the characteristic of multi-point adsorption and is high in washing resistance; the polymer is composed of small molecular weight compounds and can be used for transformation of low-permeability and ultra-low-permeability reservoirs. And meanwhile, the fracturing fluid has good compatibility with the fracturing fluid, the influence on the viscosity of the fracturing fluid is small, and the sand-carrying performance of the fracturing fluid can be guaranteed while reservoir protection is realized. The preparation method of the clay stabilizer containing the dihydroxyl quaternary ammonium salt is simple in process, easy to control and implement and suitable for industrial large-scale production.

The invention belongs to the technical field of underground engineering grouting materials, and discloses an anti-dispersion solid waste grouting filling material and a preparation method and application thereof. The slurry A is prepared from the following components in parts by mass: 400 to 1000 parts of fly ash, 500 to 1000 parts of blast furnace slag, 100 to 500 parts of Portland cement, 250 to 1200 parts of water, 5 to 50 parts of sodium hydroxide and 10 to 50 parts of PolyFure-I; the polyFure-I comprises acrylamide and N, N, N ', N'-tetramethylethylenediamine, and the polyFure-I comprises acrylamide and N, N, N ', N'-tetramethylethylenediamine; the slurry B is prepared from the following components in parts by mass: water glass and PolyFure-II; the PolyFure-II is prepared from water glass, an ammonium persulfate solution, xanthan gum and carboxymethyl cellulose. The flowing water dispersion resistance of the grouting material is effectively improved, the blocking effect of flowing water is enhanced, and the problem of insufficient blocking of a traditional grouting material is solved.

The invention provides a preparation method of a cyano chlorosilane compound, and the preparation method of the cyano chlorosilane compound comprises the following steps: reacting methyl dichlorosilane with a cyano-containing olefin compound under the action of a catalyst to obtain the cyano chlorosilane compound, the catalyst comprises a combination of cuprous salt, organic alkali and tetramethylethylenediamine. According to the method, methyl dichlorosilane and cyano-containing olefin are used as raw materials to react, and the cyano chlorosilane compound is prepared under the action of a specific catalyst; the preparation method is simple in reaction operation, the yield is 76% or above, the purity is 99.1% or above, and the preparation method is suitable for industrial production.

The invention discloses double-crosslinking personalized hydrogel for promoting wound healing and a preparation process thereof, and relates to the technical field of biomedical materials. The hydrogel comprises sodium alginate, modified chitosan, calcium carbonate, glucolactone, acrylamide, methylene diacrylamide, ammonium persulfate and tetramethylethylenediamine, and the hydrogel can also carry drugs in the preparation process, including but not limited to drugs with the functions of diminishing inflammation, resisting bacteria, stopping bleeding and the like. The hydrogel is prepared in a double-crosslinking mode of physical crosslinking and chemical crosslinking. The hydrogel provided by the invention has the advantages of high biocompatibility, adjustable viscosity, easy replacement, adjustable water absorbability and temperature responsiveness, has a loose porous structure, has better water content, cell proliferation and migration performance, swelling performance, drug sustained release performance and the like, can effectively promote wound healing, and has a good application prospect. The method has potential application prospects in skin wound treatment and repair.

The present invention relates to a medical hydrogel, and in particular to a hydrogel, a preparation method therefor and the use thereof. The preparation method comprises the steps of: completely dissolving polyvinyl alcohol in deionized water to obtain a component A in a clear state; dissolving acrylamide in deionized water, then adding N,N-methylene bisacrylamide and ammonium persulfate, and mixing same until uniform to obtain a component B; and mixing the component A and the component B at a volume ratio of 1:1 and stirring same until the mixture is completely clear and transparent, then adding Ag-ZnO nanoparticles, and finally dropwise adding a tetramethylethylenediamine solution to obtain a hydrogel prepolymer, and curing same to obtain the hydrogel. The hydrogel obtained in the present invention can be applied to an organ model for surgical training, so that the prepared organ model can more accurately simulate the properties of a biological soft tissue to make surgical training more realistic, has a better performance in terms of inhibiting bacteria, anti-fatigue, electric conduction, stretching, compression and the like, and can also be subjected to operations such as electrocoagulation and hemostasis, endoscopy, suturing and cutting.

The present invention discloses a preparation method of chrome-free tanned upper leather, comprising the following steps: Step 1: Re-wetting Add the prepared aqueous solution of sodium chloride and sodium bicarbonate into a drum machine, and then put in the raw hide, and rotate for 10 - 30 min; Step 2: Water washing Immerse the re-wetted raw hide in pure water and wash for 10 - 30 min; Step 3: Tanning Add water, a catalyst, and a modified tanning agent into the drum machine, and run the drum machine for tanning for 200 - 360 min; Step 4: Alkali raising Add sodium bicarbonate into the drum machine, adjust the pH to 8.0, raise the temperature to 35 °C, rotate for 4 h, stand for 5 - 20 h, and dry to obtain the upper leather; The modified tanning agent is formed by the reaction of starch, trimethylolethane triglycidyl ether, tetramethylethylenediamine, N-(2-hydroxyethyl)guanidine, and epoxypropionic acid. The purpose of the present invention is to provide a preparation method of chrome-free tanned upper leather.

This invention relates to a method for preparing a broadband absorption hydrogel. The method comprises the following steps: S1, mixing solvent A (N,N-dimethylformamide or acetonitrile) with deionized water to obtain a mixed solvent; S2, adding polyethylene glycol methyl ether acrylate-480 and acryloylmorpholine to the solvent in S1 and dissolving them to obtain a mixed solution; S3, removing dissolved oxygen from the mixed solution in S2, sealing the container, and stirring under ice bath conditions; S4, adding potassium persulfate and N,N,N',N'-tetramethylethylenediamine to the mixed solution after stirring in S3, and sealing the container again; S5, completing the polymerization reaction in the container at 60 °C to obtain the hydrogel. Compared with the prior art, the hydrogel material provided by this invention has improved reflection loss intensity and effective absorption bandwidth performance, thus providing a new perspective for developing highly flexible and efficient electromagnetic wave absorbers.

The invention relates to polyvinyl alcohol polynitrogen isoacrylamide cellulose hydrogel with an anisotropic structure as well as a preparation method and application of the polyvinyl alcohol polynitrogen isoacrylamide cellulose hydrogel, and belongs to the technical field of water catching materials. The preparation method of the hydrogel comprises the following steps: S1, adding polyvinyl alcohol, glutaraldehyde and lithium chloride into deionized water to obtain a mixed solution A; s2, adding the cellulose nanocrystal powder into deionized water to obtain a cellulose nanocrystal dispersion liquid; s3, adding N-isoacrylamide and N, N-methylene bisacrylamide into deionized water, so as to obtain a mixed solution B; s4, adding the mixed solution A and the cellulose nanocrystal dispersion solution into the mixed solution B, and reacting to obtain a mixed solution C; s5, ammonium persulfate, hydrochloric acid and tetramethylethylenediamine are added into the mixed solution C, freezing, low-temperature crosslinking and unfreezing are conducted, and then freezing-unfreezing circulation crosslinking is conducted; and finally, taking out, unfreezing and dialyzing. The hydrogel provided by the invention has a highly anisotropic structure and regular vertical pore channels.

The invention belongs to the field of intelligent materials, and discloses nanofiber-based shape memory aerogel as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: adding 4, 4-diaminodiphenyl ether and 1, 2, 4, 5-pyromellitic dianhydride into N, N-dimethylformamide to prepare a polyamide acid solution; carrying out electrostatic spinning by taking the polyamide acid solution as a spinning solution to obtain a polyamide acid nanofiber membrane; cutting the polyamide acid nanofiber membrane into fibers with micron lengths, and carrying out amidation treatment to obtain polyimide nanofibers; the preparation method comprises the following steps: adding polyimide nanofibers, high-molecular-weight polyethylene glycol diacrylate and low-molecular-weight polyethylene glycol diacrylate into water, uniformly dispersing, and then adding ammonium persulfate and tetramethylethylenediamine to obtain a first mixed solution; performing freeze polymerization reaction on the first mixed solution, and performing freeze drying after the reaction is finished to obtain the nanofiber-based shape memory aerogel. The aerogel has excellent mechanical properties and shape memory properties, and can be widely applied to the industry.

A sealing gel with delayed gelation for well cementation, its preparation method, and application are provided. The sealing gel with delayed gelation for well cementation includes 2-3 parts of anionic polyacrylamide, 3-4 parts of cationic acrylamide, 1 part of stabilizer, 1 part of cross-linking agent and 6 parts of distilled water; the stabilizer is obtained by the reaction of citric acid and ethylenediaminetetraacetic acid disodium under the action of initiator, the cross-linking agent is obtained by the reaction of chromium lactate and chromium nicotinate under the action of azo diisobutyl amidine hydrochloride and tetramethylethylenediamine. Based on the purpose of well cementation, the sealing gel has pH sensitivity, which prolongs the gelation time of the gel that is originally rapidly formed at a certain temperature, so that it can be added to the pre-liquid system.

This invention relates to the field of organic synthesis technology, specifically to a highly efficient and stable Grignard preparation and its green preparation method. By weight, it comprises 8-18 parts of a magnesium source, 40-92 parts of a halogenated hydrocarbon, 150-200 parts of a green solvent, 15-20 parts of ethylene glycol dimethyl ether, and 2.3-3.2 parts of a synergistic stabilizer. The green solvent is 2-methyltetrahydrofuran, or a composite solvent with a weight ratio of 2-methyltetrahydrofuran:methyl tert-butyl ether of 150-160:40-50. The synergistic stabilizer is composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 0.8-1.2 parts of butylated hydroxytoluene, or composed of 1.5-2.0 parts of N,N,N',N'-tetramethylethylenediamine and 1.0 part of phenothiazine. This invention uses a green solvent system to replace traditional toxic and harmful solvents, and combines it with a solvent recovery process to achieve solvent recycling, which greatly reduces waste emissions and makes the production process safer and more environmentally friendly, in line with the development direction of green chemical industry.

The invention relates to a hydrogel with both strength and electromagnetic wave absorption and a preparation method thereof. The preparation method of the hydrogel material comprises the following steps: S1, carrying out amination treatment on Fe3O4; s2, adding Fe3O4-NH2 and GO in the step S1 into deionized water, and carrying out ultrasonic dispersion; s3, adding polyethylene glycol methyl ether acrylate-480 and acryloyl morpholine into the dispersion liquid in the S2, and dissolving the polyethylene glycol methyl ether acrylate-480 and the acryloyl morpholine to obtain a mixed liquid; s4, removing dissolved oxygen in the mixed solution in S3, sealing the container, and stirring under an ice bath condition; s5, adding potassium persulfate and N, N, N ', N'-tetramethylethylenediamine into the mixed solution stirred in the step S4, and closing the container again; s6, the container is subjected to a polymerization reaction at the temperature of 60 DEG C, and hydrogel is obtained. Compared with the prior art, when the thickness of the hydrogel material is 2.07 mm, strong broadband microwave absorption is achieved, RLmin is-57.0 dB, EABmax is 6.4 GHz, meanwhile, excellent flexibility is kept, and the work provides a new view angle for developing a high-flexibility and efficient electromagnetic wave absorber.

The present invention relates to a composition comprising at least one amine selected from the group consisting of N,N,N',N'-tetramethylethylenediamine, N,N,N',N'- tetramethylpropylenediamine, 1,8-diazabicyclo[5.4.0]undec-7-ene, N,N- dimethylethylenediamine, 4-methylmorpholine, dimethyl-(2-azidoethyl)amine and mixtures thereof; at least one organic solvent selected from the group consisting of acetonitrile, dimethyl isosorbide, acetone, dimethylsulfoxide, and mixtures thereof; and at least one carboxylic, nitrate, or sulfate salt of a transition metal; wherein the transition metal is completely dissolved in the composition. The invention also relates to hypergolic compositions and uses thereof.

The application provides a fluorine-substituted graphdiyne-protected zinc ion secondary battery zinc negative electrode and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a reaction solution, wherein the reaction solution comprises 1,3,5-trifluoro-2,4,6-tri-alkynyl benzene, cuprous iodide, pyridine, tetrahydrofuran and N,N,N',N'-tetramethyl ethylenediamine; and (2) taking a zinc foil as a substrate, and preparing the fluorine-substituted graphdiyne-protected zinc ion secondary battery zinc negative electrode in situ on the surface of the zinc foil through a cross-coupling reaction of 1,3,5-trifluoro-2,4,6-tri-alkynyl benzene in the reaction solution. According to the preparation method, the fluorine-substituted graphdiyne can be controllably grown on the surface of the zinc foil through an in-situ preparation method, the preparation method has the advantages of mild conditions, simple operation and suitability for large-scale preparation. Moreover, the prepared fluorine-substituted graphdiyne-protected zinc ion secondary battery zinc negative electrode can be used as a new negative electrode material of the zinc ion secondary battery, can inhibit zinc dendrite growth and relieve hydrogen evolution, and can significantly improve the cycle life of the zinc ion secondary battery.

The application belongs to the technical field of adsorbents, and provides a composite adsorbent material for uremia and a preparation method thereof, and the preparation steps are as follows: S1. Acrylamide, N,N'-methylenebisacrylamide, glycerol and deionized water are mixed, stirred, sodium alginate is added, stirred and dissolved, ammonium persulfate, calcium sulfate and tetramethylethylenediamine are sequentially added, stirred, ultrasonically treated, and heated and reacted to obtain a sodium alginate derivative; S2. The sodium alginate derivative and deionized water are mixed, modified high-density polyethylene is added, stirred, and soaked in a CaCl2 solution for crosslinking to obtain a sodium alginate composite material; S3. CeO2 / MoS2 functional material, sodium alginate and deionized water are mixed, the sodium alginate composite material is added and stirred, shaped, soaked in a CaCl2 solution for crosslinking, washed, and dried to obtain the composite adsorbent material. The composite adsorbent material has a high adsorption rate and high adsorption capacity for uremia toxins, and has good biocompatibility and hemocompatibility.

The invention relates to a polynitrogen isoacrylamide graphene oxide cellulose hydrogel with an anisotropic structure as well as a preparation method and application of the polynitrogen isoacrylamide graphene oxide cellulose hydrogel, and belongs to the technical field of water treatment. The preparation method of the hydrogel comprises the following steps: S1, adding graphene oxide into deionized water to obtain a graphene oxide dispersion liquid; s2, adding the cellulose nanocrystal powder into deionized water to obtain a cellulose nanocrystal dispersion liquid; s3, nitrogen isoacrylamide and nitrogen nitrogen methylene bisacrylamide are added into deionized water, and a mixed solution is obtained; s4, adding a graphene oxide dispersion liquid and a cellulose nanocrystal dispersion liquid into the mixed liquid, and reacting to obtain a nanocrystal solution; s5, a catalyst and tetramethylethylenediamine are added into the nanocrystalline solution, freezing, low-temperature crosslinking and unfreezing are conducted, and then freezing-unfreezing circulation crosslinking is conducted; and finally, taking out, unfreezing and dialyzing. The hydrogel provided by the invention has excellent solar photo-thermal water evaporation performance.

This invention relates to DNA-functionalized thermosensitive phase transition polymers, their preparation methods, and applications, belonging to the interdisciplinary field of functional polymers and biomaterials. It aims to solve the technical problems of existing exosome separation methods, such as long processing time, low purity, high cost, and inability to specifically separate exosome subtypes. This invention provides a polymer prepared via free radical polymerization using N-isopropylacrylamide and acrylamide-modified DNA as monomers, and ammonium persulfate and tetramethylethylenediamine as initiators. This polymer exhibits reversible phase transition properties at physiological temperatures and is applied to the separation and detection of exosome subtypes. Specific capture and quantitative analysis are achieved through DNA recognition probes and fluorescently labeled antibodies. The polymer of this invention is simple to operate, quick to prepare, low in cost, and high in purity. It requires only a common centrifuge for non-destructive separation of exosomes and can integrate detection functions, providing technical support for diagnosis and detection.

The invention belongs to the field of organic solar cell acceptor material preparation, and discloses a preparation method of an organic non-fullerene acceptor intermediate, which comprises the following steps: taking dichloromethane as a solvent, mixing and stirring a compound 1 and a compound A, adding metal chloride in batches, reacting to obtain a compound 2, taking alpha as a solvent, and reacting to obtain the organic non-fullerene acceptor intermediate. Reacting the compound 2, the compound B and alkali liquor, and extracting to obtain a compound 3; taking monohydric alcohol as a solvent, reacting the compound 3 with sodium hydroxide, removing the solvent, adding water, adjusting the pH value to 1-2, stirring, filtering and drying to obtain a compound 4; taking beta as a solvent, reacting the compound 4, tetramethylethylenediamine and cuprous oxide to the end point, adding an acidifying agent, extracting with petroleum ether, filtering the obtained organic phase with diatomite, washing a filter cake with petroleum ether, removing the organic solvent under reduced pressure, and drying to obtain a compound 5; taking tetrahydrofuran as a solvent, reacting the compound 5, extracting with petroleum ether, and removing the organic solvent under reduced pressure to obtain a compound 6;

The present application relates to the technical field of biomedical materials, and particularly relates to a 3D-printed self-produced electricity hydrogel scaffold for promoting wound healing and a preparation method and application thereof, comprising an anode scaffold and a cathode scaffold, the anode scaffold is prepared from a zinc-containing hydrogel, and the cathode scaffold is prepared from an iron-containing hydrogel; the anode scaffold further comprises a prepolymerization solution prepared from dopamine, ammonium persulfate, N,N'-methylene bisacrylamide, acrylamide and tetramethylethylenediamine; the hydrogel scaffold can gradually degrade to release metal ions, play an anti-inflammatory and angiogenic role, can remove free radicals such as active oxygen and active nitrogen, and play an antioxidant role; the output voltage can be stabilized for more than 7 days, the expression of repair-related genes can be improved through physiological micro-current stimulation, the proliferation and migration of fibroblasts can be promoted, the wound can be accelerated to realize scarless healing within 16 days, and the hydrogel scaffold has a wide application prospect.