44 results about "Dimethyl acetamide" patented technology

The invention discloses a superfine high-strength meta-position aramid fiber and a preparation method thereof, and the superfine high-strength meta-position aramid fiber is obtained by adjusting the type of a wet spinning coagulating bath and reducing the temperature of the coagulating bath to realize super-stretching. Ethyl acetate and dimethylacetamide are used as a coagulating bath, and meanwhile, the temperature of the coagulating bath is reduced, so that the coagulating speed of the fiber in the coagulating bath is slowed down, the intermolecular force of the fiber is stronger, a more stable network gel state is formed, and very excellent stretchability is achieved. The meta-position aramid fiber prepared by the method has the advantages that the diameter is as small as 1.43 mu m, the tensile rate can reach 8000 times, the breaking strength reaches 1332 MPa, and the elongation at break is more than 20%.

The invention relates to the technical field of nano-generators, in particular to a triboelectric material of nano-porous composite fibers and a preparation method and application of the triboelectric material of the nano-porous composite fibers, and the preparation method comprises the following steps: adding polyvinylidene fluoride and perfluoroethylene propylene copolymer nanoparticles into a mixed solvent of N, N-dimethylacetamide / acetone; uniformly mixing to obtain a polyvinylidene fluoride / perfluoroethylene propylene copolymer nanoparticle spinning emulsion; and carrying out electrostatic spinning on the polyvinylidene fluoride / perfluoroethylene propylene copolymer nanoparticle spinning emulsion to obtain the triboelectric material. The triboelectric material prepared through the method is a high-charge-density super-hydrophobic nano-generator material based on electrostatic spinning, the electrostatic spinning porous composite fiber material is used as a friction medium layer, high surface charge, hydrophobicity and fouling resistance are achieved, and the performance of a flexible solid-liquid interface nano-generator is improved.

The invention relates to the technical field of batteries, and discloses an electrolyte and application thereof, and a lithium carbon fluoride battery. The electrolyte comprises a lithium salt and an organic solvent; wherein the lithium salt is lithium bis (fluorosulfonyl) imide; the organic solvent is selected from one of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene carbonate, propylene carbonate, dimethyl carbonate, ethyl methyl carbonate, dimethylformamide, dimethylacetamide and dimethyl sulfoxide. The electrolyte can be applied to preparation of a lithium primary battery. The invention also relates to a lithium carbon fluoride battery comprising the electrolyte. The electrolyte system provides an optimized solution for the preparation of the high-energy-density lithium carbon fluoride battery, has a wide application prospect, can remarkably improve the performance of the battery, reduces the production cost, and promotes the further development of the lithium carbon fluoride battery technology.

The invention relates to a synthesis method of an allyl amine compound. According to the method, 2-methylquinoline or acetophenone derivatives are used as raw materials, a selective fluorine reagent Selectfluor is used as an accelerant, dimethyl sulfoxide and N 'N-dimethylacetamide are used as a mixed solvent, and the allyl amine series compounds are prepared with high yield. The preparation method has the advantages of being low in cost, easy to operate, green, free of pollution and the like, and has potential industrial application prospects. The method provides a green, cheap and convenient way for preparing the allyl amine derivative by using 2-methylquinoline or acetophenone compounds as initiators.

This invention discloses an organosilicon side-chain modified acrylate polymer antifouling coating and its preparation method. The antifouling coating consists of component A and component B. Component A is prepared by dissolving polytetrahydrofuran ether diol in N,N-dimethylacetamide and reacting it with diisocyanate. Component B is prepared by mixing methyl methacrylate, acrylic acid, hydroxyacrylate, acryloyloxypropylsilane, and ethyl acetate, adding a peroxide initiator, and then performing free radical polymerization. The antifouling coating prepared by this invention exhibits excellent substrate adhesion and antifouling properties, making it suitable for antifouling of marine vessels.

The invention discloses resin as well as a preparation method and application thereof, and belongs to the field of production of high polymer materials and semiconductors. The preparation method provided by the invention comprises the following steps: adding hexamethylenetetramine into a benzo-12-crown-4 solution, reacting with trifluoroacetic acid, and carrying out heating reflux, water addition, stirring and pH regulation to obtain 4 '-aldehyde benzo-12-crown-4; then, 4 '-aldehyde benzene-12-crown-4 and methylamine are subjected to a reaction in a tetrahydrofuran solution, acetic acid and sodium borohydride are added, and 4'-amine benzene-12-crown-4 is obtained; finally, 4 '-aminobenzene-12-crown-4 and acid anhydride are subjected to a reaction in dimethylacetamide, triethylamine is dropwise added, then heating is conducted, dialysis and freeze drying are conducted, and the 12-crown-4 functional resin is obtained. The prepared 12-crown-4 functional resin has a large specific surface area, and has the advantages of high adsorption efficiency, large adsorption capacity, easiness in regeneration and environmental friendliness on metal ions in NMP (N-Methyl Pyrrolidone).

The present invention relates to the technical field of wastewater treatment, and specifically relates to a combined treatment method of resin and electrooxidation for dimethylacetamide wastewater. Its preparation process includes the following steps: crosslinking of lignocellulose and styrene particles; preparation of lignocellulose / vinylpyridine modified resin; preparation of acetamide adsorption resin; combined treatment of resin and electrooxidation for dimethylacetamide wastewater. After the crosslinking of lignocellulose and styrene, further crosslinking is carried out with vinylpyridine monomer, and a multi-dimensional crosslinked network resin grafted with lignocellulose and styrene with vinylpyridine as the substrate is formed, thereby significantly improving the adsorption efficiency of dimethylacetamide. Moreover, the groups in vinylpyridine can be introduced into the resin as functional groups, and lignocellulose contains active groups, and these groups can cooperate with the pyridine ring after crosslinking to further enhance the adsorption capacity of dimethylacetamide.

The invention provides a polymer solid electrolyte and a preparation method thereof, a sodium ion battery and electric equipment, and relates to the field of solid electrolytes. The preparation method comprises the following steps: mixing dimethylacetamide, N-methyl pyrrolidone, a brominated flame retardant, a dianhydride monomer and a diamine monomer to obtain a first mixed solution; coating the surface of a glass plate with the first mixed solution to obtain a film; mixing the thin film, dimethylacetamide and ethanol, and performing first drying to obtain a porous film; carrying out thermosetting on the porous membrane to obtain an imidization porous membrane; polyoxyethylene, bis (trifluoromethylsulfonyl) imide sodium and acetonitrile are mixed, and a second mixed solution is obtained; and mixing the imidization porous membrane with the second mixed solution, heating in a vacuum environment, and carrying out second drying to obtain the polymer solid electrolyte. The flame retardant is added for coating to obtain the film, and then the film is subjected to pore forming and imidization, so that the film has high mechanical strength, and has incombustibility and high safety while potential sodium dendritic crystal permeation can be prevented.

The application provides a method for catalytic degradation of polyolefin plastic by using a eutectic solvent, comprising the following steps: placing polyolefin plastic particles, C4-C6 alkane, amide-AlCl3 eutectic solvent, initiator and polychloromethane in a reactor to perform a catalytic degradation reaction in a water-free and sealed environment to obtain a hydrocarbon product; wherein the C4-C6 alkane is added before the polyolefin plastic particles and the amide-AlCl3 eutectic solvent coexist in the reactor; the amide-AlCl3 eutectic solvent comprises an amide compound and AlCl3; the amide compound is selected from one or more of chloroacetamide, formamide, acetamide, N-methyl formamide, N-methyl acetamide, N,N-dimethyl acetamide, N,N-diethyl acetamide and N,N-dimethyl formamide; the application first applies the eutectic solvent to the catalytic degradation of the polyolefin plastic, and solves the problems of low efficiency and high cost of the traditional method at low temperature.

A process for producing cellulose ester fibers is provided, the process comprising dry spinning a cellulose ester dope through a spinneret to make the cellulose ester fibers, wherein the cellulose ester dope comprises dissolved and / or dispersed solids (hereinafter "solids" ) and solvent, at least 35 wt. % of the solids comprises cellulose ester, and the solvent comprises N, N-dimethylformamide, N,N-dimethylacetamide, or dimethyl sulfoxide, or mixtures thereof, provided that if the solvent comprises N, N-dimethylacetamide: (i) the cellulose ester dope comprises not more than 50% by weight acetone, based on the total weight of the cellulose ester dope; or (ii) the cellulose ester dope comprises 0% by weight cellulose nanocrystals based on the total weight of the cellulose ester dope; or (iii) both (i) and (ii), wherein the combined weight of a polyurethane, polyolefin, nylon, polyester, and / or polyurethaneurea, if present in the cellulose ester dope, is not more than 60% by weight, based on the total solids in the cellulose ester dope; and wherein there is a substantial absence of an organic acid.

A method for preparing polyacrylonitrile spinning solution by physical crosslinking and dissolving of different molecular weights belongs to the technical field of dry high molecular weight polyacrylonitrile. It comprises the following steps: pouring a ternary high molecular weight polyacrylonitrile powder with less mixing ratio into a dimethylacetamide solvent and stirring it fully, so that it is evenly dispersed in the solvent, heating it to 60°C, and after the stock solution is fully swollen to be transparent, adding a larger proportion of binary polyacrylonitrile powder in batches, stirring evenly, and gradually heating it to 90-100°C after swelling evenly at 60-80°C to dissolve, forming a uniform and transparent polyacrylonitrile solution. The method for preparing high-performance dry polyacrylonitrile spinning solution by physical crosslinking and dissolving of different molecular weights of the present invention is simple in process and easy to operate. Under the premise of ensuring the high solid content of the polyacrylonitrile spinning solution, it gives the polymer material stronger mechanical properties.

Provided are silica sols containing organic acids dispersed in nitrogen-containing organic solvents, and insulating resin compositions comprising the silica sol and nitrogen-containing polymers. The silica sol is a silica sol in which silica particles having an average primary particle size of 5-100 nm are dispersed in a nitrogen-containing organic solvent, and the silica sol contains a carboxylic acid with 1-3 carbon atoms in a proportion of 80-1500 ppm. The nitrogen-containing organic solvent is an amide-based silica sol. The nitrogen-containing organic solvent is a silica sol containing dimethylacetamide, dimethylformamide, or dimethylpropionamide. The carboxylic acid with 1-3 carbon atoms is a silica sol containing formic acid, acetic acid, or propionic acid. The insulating resin composition comprises a silica sol and a nitrogen-containing polymer.

The invention discloses a production process of polyacrylonitrile-based carbon fibers, and belongs to the related field of carbon fiber production. The production process comprises the following steps: preparing acetylene by adopting a natural gas partial oxidation method and by-producing acetylene tail gas; preparing hydrocyanic acid by adopting a natural gas ammoxidation method; acrylonitrile is synthesized through an acetylene-hydrocyanic acid method; preparing carbon fibers from acrylonitrile; the acetylene tail gas is divided into three parts, one part is used for extracting hydrogen and carbon monoxide; one part is used for synthesizing ammonia; the last part is used for producing methanol; hydrogen extracted from acetylene tail gas is used as hydrogen for carbon fiber synthesis; the ammonia part synthesized from the acetylene tail gas is used for synthesizing hydrocyanic acid; part of the mixed methylamine and methanol synthesized by acetylene tail gas are synthesized into mixed methylamine, dimethylamine separated from the mixed methylamine and carbon monoxide extracted from the acetylene tail gas are subjected to carbonylation reaction to generate dimethylacetamide, and the dimethylacetamide is used for preparing carbon fibers prepared from acrylonitrile. The whole-process industrial chain constructed by the method can realize closed-loop production, and the whole-cycle carbon emission is remarkably reduced while the resource utilization rate is increased.

The application belongs to the technical field of preparation of flame-retardant fibers, and discloses a preparation method of flame-retardant polyacrylonitrile fibers and the flame-retardant polyacrylonitrile fibers, the preparation method comprising the following steps: (1) adding a composite flame retardant powder and a polyacrylonitrile powder into dimethylacetamide, grinding and dispersing, and then filtering to obtain a flame-retardant slurry; (2) adding the polyacrylonitrile powder into dimethylacetamide, uniformly mixing, and heating to completely dissolve to obtain a polyacrylonitrile stock solution; (3) preparing a spinning stock solution: uniformly mixing the flame-retardant slurry and the polyacrylonitrile stock solution according to the mass ratio of the composite flame retardant to the polyacrylonitrile being 1:2.3-4.0 to obtain the spinning stock solution; and (4) spinning by using the spinning stock solution to prepare the flame-retardant polyacrylonitrile fibers. The application adds a certain amount of polyacrylonitrile in the flame-retardant slurry, which can more easily uniformly mix with the polyacrylonitrile stock solution, can increase the addition amount of the composite flame retardant in the fibers, and will not obviously affect the mechanical properties of the fibers.

The invention relates to a continuous preparation method of 2-chloro-N, N-dimethyl nicotinamide, and belongs to the technical field of organic synthesis. In a tubular reactor, 3-di-n-propylamino acrolein and 2-cyano-N, N-dimethylacetamide are used as raw materials to react, the obtained product reacts with hydrogen chloride, and 2-chloro-N, N-dimethyl nicotinamide is obtained. The tubular reactor is adopted for continuous production, so that the reaction period is greatly shortened, the process operation is reduced, and the reaction cost is reduced.

Provided are: a silica sol which contains an organic acid and is dispersed in a nitrogen-containing organic solvent; and an insulating resin composition which contains the silica sol and a nitrogen-containing polymer. A silica sol in which silica particles having an average primary particle diameter of 5-100 nm are dispersed in a nitrogen-containing organic solvent, the silica sol containing a carboxylic acid having 1-3 carbon atoms at a ratio of 80-1500 ppm. The nitrogen-containing organic solvent is a silica sol of an amide-based solvent. The nitrogen-containing organic solvent is silicon dioxide sol of dimethyl acetamide, dimethyl formamide or dimethyl propionamide. And a silica sol in which the carboxylic acid having 1-3 carbon atoms is formic acid, acetic acid, or propionic acid. An insulating resin composition includes a silica sol and a nitrogen-containing polymer.

The invention belongs to the technical field of oil-water well plug removal, and discloses a water injection well plug removal working solution and a plug removal method.The plug removal working solution comprises a plug removal agent A and a plug removal agent B. The plug removal agent A comprises, by weight, 20%-30% of sodium metaaluminate, 10%-15% of sodium citrate and / or sodium succinate, 5%-10% of urea, 10%-20% of ammonium chloride and / or ammonium bromide and the balance water. The blocking remover B comprises the following components in percentage by weight: 8-12% of ferrous chloride and / or ferrous sulfate, 5-10% of sodium thiosulfate, 10-20% of dioctadecyl methyl benzyl ammonium chloride and dihexadecyl dimethyl ammonium chloride and / or dioctadecyl dimethyl ammonium chloride, 10-15% of isobutanol and NN dimethyl formamide and / or NN dimethyl acetamide, and the balance of water. 5-8% of N-beta-hydroxyethyl ethylenediamine triacetic acid and the balance of water. The unblocking working solution has excellent dissolving and dispersing performance and strong agglutination performance, is high in safety, and can effectively prolong the unblocking validity period.

This invention discloses a fiber pretreatment method and the application of the pretreated fibers. The method involves dissolving the fibers in dimethylacetamide at room temperature to obtain dissolved fibers. These dissolved fibers are then treated in a LiCl / DMAc solution. After removing the reagents by squeezing, the fibers are washed, filtered, and dried to obtain pretreated fibers. These pretreated fibers are then used in the preparation of glue-free laminated fiberboard. The LiCl / DMAc solution treatment significantly increases the area of ​​the self-bonding interface of the fibers and enhances the surface hydroxyl activity. During the glue-free bonding process, not only do the degradation products of hemicellulose and lignin self-bond, but cellulose also melts and regenerates to form filaments, which then self-bond under hydrogen bonding, significantly improving the performance of the glue-free laminated board.

The invention discloses a heat-insulating porous micro-nano fiber membrane and a preparation method thereof. The method comprises the following steps: 1) adding an oil phase to a continuous phase under stirring, and stirring until completely emulsified to obtain a microemulsion, wherein the oil phase contains ethanol, acetic acid, hexadecyltrimethylammonium bromide and liquid paraffin, and the continuous phase contains polyimide, polysulfoneamide and N,N-dimethylacetamide; 2) electrostatic spinning the microemulsion to obtain a micro-nano fiber membrane; 3) calcining the micro-nano fiber membrane to obtain the heat-insulating porous micro-nano fiber membrane. The present invention first prepares a micro-nano fiber membrane by electrostatic spinning of a microemulsion, and then calcining it, volatilizing the organic solvent and the liquid paraffin components therein to form a porous structure, and the prepared porous micro-nano fiber membrane has a low thermal conductivity and excellent heat insulation effect.

The invention discloses an antibacterial fiber, a preparation method thereof and a fabric, relates to the technical field of functional fibers, and belongs to the patent publication number D01F6 / 54. The preparation method of the antibacterial fiber comprises the following steps: uniformly mixing an acrylonitrile monomer, vinyl acetate, methacryloyloxyethyl trimethyl ammonium chloride and absolute ethyl alcohol to obtain a mixed solution; adding polyvinyl alcohol into the mixed solution, heating, stirring and reacting to obtain polyacrylonitrile copolymer powder; polyvinylpyrrolidone and nano-zinc oxide are added into dimethylacetamide, and nano-antibacterial dispersed slurry is obtained; polyacrylonitrile copolymer powder is added into the nano-antibacterial dispersion slurry, and a composite nano-antibacterial spinning stock solution is obtained; and conveying the composite nano antibacterial spinning solution to a spinning machine for spinning to obtain the antibacterial fiber. The antibacterial fiber fabric prepared by the method disclosed by the invention has excellent antibacterial performance and antibacterial durability.

This invention relates to pharmaceutical formulations and formulation strategies of protides (phosphoramidate derivatives of nucleosides) and, in particular, protides useful in the treatment of cancer such as NUC-3373 (5-fluoro-2′-deoxyuridine-5′-O-[1-naphthyl (benzoxy-L-alaninyl)] phosphate) and NUC-7738 (3′-deoxyadenosine-5′-O-[phenyl (benzyloxy-L-alaninyl)] phosphate). In particular, the invention relates to formulations which comprise a polar aprotic solvent, for example dimethyl acetamide (DMA).

Provided are stable, concentrated, and palatable solutions suitable for sublingual and / or transurethral administration containing tadalafil, with or without other active ingredients to address comorbidities, in a liquid vehicle or solvent selected from propylene carbonate, 2-pyrrolidone, dimethyl isosorbide, dimethyl acetamide, n-methyl-2-pyrrolidone, ethanol, water, oleic acid, and isopropyl myristate. The solutions have low irritancy for sublingual tissues and a-are compatible with commercial atomizers. The invention is further directed to methods of treating male erectile dysfunction and / or comorbidities by administering an effective amount of the pharmaceutical formulations comprising tadalafil, with or without other active ingredients, to a patient in need of such treatments.

The invention discloses a preparation method of a polyacid-modified covalent organic skeleton modified diaphragm for a lithium-sulfur battery, a modified diaphragm and a lithium-sulfur battery, and belongs to the technical field of batteries. DTQ-COF solid powder is synthesized under the conditions that 2,6-diaminoanthraquinone and trialdehyde phloroglucinol are solutes, mesitylene and N,N-dimethylacetamide are mixed solvents, and acetic acid is used as a catalyst, and then Keggin-type phosphotungstic acid and phosphomolybdic acid are attached to the DTQ-COF skeleton by adsorption to obtain a composite material PW 12 / DTQ‑COF and PMo 12 / DTQ‑COF, and finally the two composite materials were mixed with PVDF and Super‑P in a defined ratio to prepare a modified diaphragm. 12 / DTQ‑COF and PMo 12 / DTQ‑COF has an ordered structure, which can increase the conductivity of lithium ions in the separator, thereby improving the charge and discharge efficiency of the battery.

The invention discloses a method for preparing ethanol and methanol through hydrogenation reduction of methyl acetate. The method comprises the following steps: taking a copper-loaded zinc oxide / carbon composite material as a catalyst, and introducing hydrogen into a reaction kettle to catalyze a hydrogenation reduction reaction of methyl acetate to prepare methanol and ethanol. The preparation method of the copper-loaded zinc oxide / carbon composite material comprises the following steps: S1, dissolving trimesic acid into N, N-dimethylacetamide, and then adding zinc nitrate for reaction; and S2, adding a product obtained after the reaction in the step S1 into a copper nitrate solution, stirring, standing, filtering and calcining to obtain the copper-loaded zinc oxide / carbon composite material. The copper-loaded zinc oxide / carbon composite material is used as a catalyst, so that the ethanol can be prepared by hydrogenation reduction of methyl acetate under low hydrogen pressure.

The invention relates to the technical field of in-vitro detection reagents, and particularly discloses a cholinesterase determination reagent and application thereof. The cholinesterase determination reagent comprises a reagent I containing potassium ferricyanide and a buffering agent and a reagent II containing butyryl thiocholine iodide and a buffering agent, wherein the reagent I further comprises a surfactant; the reagent II further comprises a surfactant and a stabilizer; the stabilizer is dimethyl sulfoxide or dimethyl acetamide; the surfactant is one or two of polyoxyethylene dodecyl ether, fatty alcohol containing eight EO ethylene oxide groups, polyethylene glycol monolaurate and 4-nonylphenyl-polyethylene glycol. The cholinesterase determination reagent provided by the invention is accurate in test result and improved in stability, the result of a determined sample can be continuously stable for 60 days in a bottle opening use state at 2-8 DEG C, the result of the determined sample can be continuously stable for 24 months in a closed dark storage process at 2-8 DEG C, and the reagent has no color change and is beneficial to storage and use.

The invention relates to a perovskite modification solution, a perovskite cell, a preparation method of the perovskite cell and a photovoltaic module. The perovskite modifying solution comprises a modifying agent, a passivating agent, a first solvent and a second solvent, the first solvent comprises at least one of dimethyl sulfoxide, dimethyl acetamide, N-methyl pyrrolidone, N-ethyl pyrrolidone, tetramethylene sulfoxide, methyl phenyl sulfoxide and butyrolactone, and the second solvent comprises at least one of dimethyl sulfoxide, dimethyl acetamide, N-methyl pyrrolidone, N-ethyl pyrrolidone, tetramethylene sulfoxide, methyl phenyl sulfoxide and butyrolactone; the second solvent comprises at least one of isopropanol, anisole, chlorobenzene, dichlorobenzene and ethyl acetate. According to the perovskite modification solution, the modification agent, the passivating agent and the specific type of the first solvent and the second solvent cooperate with each other to act together, so that the stability and the photoelectric conversion efficiency of the perovskite battery can be effectively improved.

The invention discloses an inert liquid synthesis method, which comprises the following steps: mixing N, N-dimethylformamide or N, N-dimethylacetamide and 1, 1, 2, 2, 3, 3, 4-heptafluorocyclopentane according to a molar ratio of 2: 1 to obtain a mixed solution; heating the mixed solution to a preset temperature, and stirring for 5-7 hours to obtain an inert liquid; wherein the temperature is raised to 160 DEG C if the mixed solution is N, N-dimethyl formamide and 1, 1, 2, 2, 3, 3, 4-heptafluorocyclopentane, and the temperature is raised to 170 DEG C if the mixed solution is N, N-dimethyl acetamide and 1, 1, 2, 2, 3, 3, 4-heptafluorocyclopentane. The invention also discloses a device and a method for collecting the inert liquid synthesized by using the inert liquid synthesis method and measuring gas produced by battery formation. According to the battery formation gas production measurement method, the inert liquid synthesized by the inert liquid synthesis method is used as a measurement medium, so that the battery formation gas production loss caused by reaction between the battery formation gas production and the medium or absorption of the battery formation gas production by the medium is avoided.

The invention discloses quaternary ammonium salt ionic liquid with antibacterial and biodegradable functions, a preparation method and application, and belongs to the field of ionic liquid organic compounds, and the preparation method comprises the following steps: adding small molecular carbohydrates and N, N-dimethylacetamide into a reaction kettle, stirring at 90 DEG C until the small molecular carbohydrates are completely dissolved, cooling to 0 DEG C, and adding an organic solvent; a first mixed solution is obtained; adding potassium carbonate, N, N-dimethylformamide and acyl chloride into the first mixed solution, uniformly mixing, and keeping the temperature at 0 DEG C to react for 12 hours to obtain a second mixed solution; adding potassium carbonate and an ammonia compound, and keeping the temperature at 80 DEG C to react for 24 hours to obtain first quaternary ammonium cation liquid; reducing the temperature to 0 DEG C, adding potassium carbonate and acyl chloride, uniformly stirring to obtain a third mixed solution, heating to 25-35 DEG C, preserving heat for 12 hours, heating to 65 DEG C, preserving heat for 4 hours, and drying in a vacuum drying oven to constant weight to prepare the glycosyl quaternary ammonium salt ionic liquid. The synthesis process is mild, and the synthesis steps are simple and environment-friendly.

This invention relates to pharmaceutical formulations and formulation strategies of protides (phosphoramidate derivatives of nucleosides) and, in particular, protides useful in the treatment of cancer such as NUC-3373 (5-fluoro-2′-deoxyuridine-5′-O-[1-naphthyl (benzoxy-L-alaninyl)] phosphate) and NUC-7738 (3′-deoxyadenosine-5′-O-[phenyl(benzyloxy-L-alaninyl)] phosphate). In particular, the invention relates to formulations which comprise a polar aprotic solvent, for example dimethyl acetamide (DMA).

This invention discloses a thermally conductive aramid insulating paper-based material, its preparation method, and its application. The preparation method of the thermally conductive aramid insulating paper-based material includes the following steps: (1) introducing amino groups onto the surface of boron nitride nanosheets to obtain aminated boron nitride nanosheets; (2) dissolving m-phenylenediamine in N,N-dimethylacetamide, then adding isophthaloyl chloride, and then adding aminated boron nitride nanosheets, and reacting to obtain a thermally conductive aramid polymer solution; (3) wet spinning the thermally conductive aramid polymer solution to obtain thermally conductive aramid fibers; (4) mixing the thermally conductive aramid fibers with precipitated fibers to form a thermally conductive aramid insulating paper-based material. This invention utilizes the amide group connection between aminated boron nitride nanosheets and aramid macromolecules to improve the interfacial compatibility between fillers and substrates in paper materials, thereby improving the strength and thermal conductivity of paper materials.