22 results about "Ionic liquid" patented technology

An electrically controlled propellant comprising an ionomer oxidizer polymer binder, an oxidizer mix including at least one oxidizer salt and at least one eutectic material, and a mobile phase comprising at least one ionic liquid is disclosed. The PVAN polymer in the present invention may be of medium (>100,000) to high molecular weight (<1,000,000). The present invention also may include the controlled cross-linking of the polymer using epoxy resins, the use of moisture barrier coating, the addition of an energetic combustion additives such as Chromium III and polyethylene glycol polymer.

The invention relates to a method for preparing an organic starch ester. The method comprises mixing a starch material with an ionic liquid solvent to dissolve the starch, and then treating the dissolved starch with an organic esterifying agent to form an organic starch ester, and subsequently separating the organic starch ester from the solution. Microwave irradiation and/or pressure can be applied to assist in dissolution and esterification.

The invention provides a method for separating aromatic hydrocarbon from alkane by ionic liquid and membrane process coupling technology. The method includes that a hollow fiber membrane component is used as an extraction and separation device, ionic liquid is filled in pores of a hollow fiber membrane to form extract, aromatic hydrocarbon and alkane mixed liquor and a back-extraction phase respectively flow in a tube pass and a shell pass of the hollow fiber membrane in parallel or reversely, aromatic hydrocarbon is preferentially transferred to the back-extraction phase via the extract owing to the difference between the solubility of the aromatic hydrocarbon and the solubility of alkane in the ionic liquid, and the purpose of separating the aromatic hydrocarbon from the alkane is achieved. The method has the advantages of good selectivity, high mass transfer efficiency, low dosage of extracting solvent, simplicity in technological process, high stability and the like.

A characterization method for the solubility of ionic liquid is applied under atmospheric pressure for testing the function among ionic liquid and gas/gas molecules of volatile organic solvent, which is characterized by comprising: using an object ionic liquid as the sensitive film coat material of a resonator induction zone of a mass sensitive piezoelectric crystal detector; coating an ionic liquid film on the surface of the resonator induction zone; detecting the frequency change of the detector before and after acting with researched gas molecules to represent the function between the researched ionic liquid and the gas. The ionic liquid characterization method can obtain the solubility of ionic liquid in gas/volatile organics, and thermodynamic parameters as enthalpy, entropy, free energy change and the like in dissolution; and can research the function approach between ionic liquid and gas molecules. The measurement method is simple, fast and reliable, which can accelerate the development and application of ionic liquid.

The invention discloses a preparation method of 2-amino-5-chloropyridine, and belongs to the field of organic chemical synthesis. The method comprises the following steps of using 2-amino-pyridine as a raw material and N-fluoro-N-chlorobenzene sulfonamide as a chlorinating agent, in an organic solvent, using imidazole ionic liquid as a catalyst, and carrying out a reaction, wherein a reaction temperature is 0 to 40 DEG C, and a reaction time is 0.2h to 24h. The method provided by the invention is simple and convenient in preparation process, mild in reaction condition, low in cost and high in product yield.

The invention provides an ionic liquid dehumidifying method and an ionic liquid dehumidifying system for regulating gas humidity. The ionic liquid dehumidifying method comprises the following steps: enabling gas with higher humidity to sufficiently contact with a gas dehumidifying agent barren liquor, thus at least enabling moisture in the gas to be absorbed by the gas dehumidifying agent barren liquor to obtain a gas with lower humidity and a gas dehumidifying agent rich liquor; the gas dehumidifying agent barren liquor contains ionic liquor at least capable of absorbing water. Preferably, ionic liquid is adopted as the gas dehumidifying agent barren liquor. Preferably, the ionic liquid can also absorb volatile organic compounds. Water in the gas can be efficiently and fast removed by adopting the ionic liquid as a dehumidifying agent, the needed equipment is simple, and the system can stably and reliably run, and is safe and environment-friendly. The ionic liquid dehumidifying method and system are especially applicable to manufacturing shops needing to control air humidity, such as lithium battery, medicament manufacturing shops, and dried warehouses; and also, the ionic liquid dehumidifying method and system can also be applied to dewatering and purification technology of natural gas, associated gas and the like.

The invention discloses a composite electrolyte material and a preparation method thereof and belongs to the technical field of lithium secondary ion battery electrolytes. Polymer fibers are prepared by an electrostatic spinning method, then silicon oxide/polymer composite fibers are prepared by a polycondensation method, and the silicon oxide/polymer composite fibers are soaked in an ionic liquid electrolyte for adsorption treatment to obtain the ionic liquid/silicon oxide/polymer fiber composite electrolyte material. A silicon oxide/polymer composite fiber material is used as a skeleton, has high adsorption space and adsorption efficiency, and can absorb a large amount of active ionic liquid components; the ionic liquid containing the lithium salt is used as an active liquid component for loading ionic conduction, has the characteristics of high ionic conductivity, non-volatility, non-flammability, chemical stability and the like, and is applied to a lithium battery system, so safety of the battery is effectively improved; the composite electrolyte material provided by the invention has high ionic conductivity and high thermal decomposition temperature, and meets the normal operation of the lithium secondary battery.

The invention discloses a pollution-resistant separation membrane containing an ionic liquid layer on the surface and a preparation method of the pollution-resistant separation membrane. The surface of the pollution-resistant separation membrane contains the same amount of anions and cations, and the surface of the membrane presents overall charge balance. According to the pollution-resistant separation membrane, anions and cations on the ionic liquid are independently or synchronously grafted on the surface of the separation membrane, so that the whole surface of the membrane is electrically neutral. According to the analysis of a zwitterionic anti-pollution mechanism, the excellent anti-pollution performance of the zwitterionic anti-pollution material mainly originates from the following two structural characteristics: 1, equivalent anionic and cationic groups contained in molecules can be tightly combined with water molecules through solvation, so that the material has excellent hydrophilic property; and secondly, equivalent anion and cation groups exist at the same time, so that the whole membrane surface is of an electrically neutral special structure, the preparation method is wide in raw material selection range, simple and mild in process, high in designability and easy to industrialize, and the prepared pollution-resistant separation membrane is remarkably improved in pollution-resistant effect and stable in structure.

The invention relates to a preparation method of nano-scale manganese lithium phosphate. The preparation method comprises the following steps: (S1) preparing manganese sesquioxide saturated choline chloride ionic liquid; (S2) preparing an aluminum-net-base lithium phosphate pole piece; and (S3) carrying out electro-depositionin the sesquioxide saturated choline chloride ionic liquid by taking the aluminum-net-base lithium phosphate pole piece as a cathode, so as to grow nano-scale manganese lithium phosphate on the cathode. The particle size of nano-scale manganese lithium phosphate prepared by virtue of the choline chloride ionic liquid is relatively uniform, the preparation process is environment-friendly, the technology is simple, and the preparation process is easily controlled.

The invention discloses a preparation method of a nanoporous material layer for a biosensor, and belongs to the field of preparation of nanoporous material layers. The preparation method comprises thefollowing steps: S1, preparing a fluorinated copolymer solution of a nanofiber matrix; S2, adding a small amount of conductive filler into the fluorinated copolymer solution prepared in the step S1,wherein the conductive filler adopts a structure of one-dimensional carbon nanotubes and a structure of two-dimensional graphene, and the mass fraction of the one-dimensional carbon nanotubes and thetwo-dimensional graphene is 0.1-0.2 wt% and 1-2 wt% respectively; S3, adding ionic liquid dispersant acryl into the solution prepared in the step S2; S4, performing electrospinning deposition on the solution prepared in the S3 for 2-5 min with an electrospinning method to prepare two to five layers of the nanoporous material layer separately. The invention relates to the method for rapidly preparing the nanoporous material with relatively low comprehensive modulus of elasticity suitable for biosensors.

The invention relates to a drying method of ionic liquid, and especially relates to a deep drying and dewatering method for the ionic liquid. The method comprises the following steps: mixing an ionicliquid to be dried with a water removal agent, and carrying out azeotropic water carrying, wherein the water removal agent is one of n-butyl acetate, isoamyl acetate, ethyl propionate and n-propyl propionate. By selecting the specific water removal agent and the specific water removal process, the purpose of reducing the water content of the ionic liquid is achieved, and the obtained low-water-content ionic liquid is high in purity and yield. According to the deep drying and dewatering method, the water content of the ionic liquid can be reduced to the maximum extent, residues of the water removal agent can be avoided to the maximum extent, and the purity of the ionic liquid is guaranteed; meanwhile, the yield of the obtained ionic liquid with low water content is extremely high. The deepdrying and dewatering method is simple and convenient in process, simple in equipment, high in drying efficiency and low in cost, and has a good application prospect.

The invention discloses a catalyst with precious metal nanoparticles carried by a ceramic precursor, and a preparation method and application of the catalyst, comprising influence of different receiving devices in an electrospray technology on particle reception, Si-H bond activity determination, carrying of precious metal nanoparticles and application of the catalyst in dye degradation. Dye degradation involves exploring influence of different influencing factors on degrading efficiency, including temperature, pH value, reaction time, ultra violet light and the like. According to the preparation method, the ceramic precursor is adopted as a catalyst carrier, the electrospray technology is used for preparing the catalyst carrier, an ionic liquid is used for reception, and microspheric particles having a particle size of about 2 to about 4 microns can be obtained while loss is reduced. The catalyst prepared by the preparation method has the advantages that the prepared the ceramic precursor polymeric microspheres can maintain Si-H reactive bond on polythene silazane and can carry platinum nanoparticles, and the catalyst has great degrading efficiency and reusability while being applied to rhodamine dye degradation.

The invention discloses a portable exothermic agent which is prepared from the following raw materials in parts by weight: 4-6 parts of expanded vermiculite powder, 3-4 parts of water, 10-12 parts ofactivated carbon, 73.9-89.9 parts of iron powder, 1 part of table salt and 1-5 parts of ionic liquid. In addition, the invention also provides a preparation method of the portable exothermic agent, which comprises the following steps: 1) mixing water, table salt and ionic liquid to form a mixed solution; and 2) adding expanded vermiculite powder, activated carbon and iron powder into the mixed solution, and uniformly mixing all the components to obtain the heat generating agent. The components of the heat generating agent provided by the invention contain less water, so that the heat generating temperature can reach 91 DEG C, and the heat generating time can reach more than 30 minutes.

The invention discloses a preparation method of a special-morphology micro nano structural lithium-rich manganese-based cathode material, and belongs to the technical field of novel energy material energy storage material preparation processes. The method comprises the following steps: dissolving a manganese salt and a nickel salt into distilled water according to a ratio to obtain an A liquid; dissolving a homogeneous precipitant weighed according to a ratio into distilled water to obtain a B liquid, introducing a certain ratio of an ionic liquid into the B liquid, performing full stirring, and performing uniform mixing; mixing the A liquid and the mixed B liquid, and performing full stirring; transferring the mixed liquid to a hydrothermal reaction kettle, performing a hydrothermal reaction, performing cooling to room temperature, performing centrifugal separation, performing washing, and performing drying to obtain a manganese-based precursor material; and finally grinding the precursor and a certain ratio of lithium carbonate, performing uniform mixing, performing pre-sintering, and performing calcination to obtain the lithium-rich manganese-based cathode material. The method provided by the invention solves the problems of high energy consumption, long consumed time and difficulty in control of product topography characteristics in the preparation process in the prior art.

The invention belongs to the technical field of lithium battery material preparation, and particularly relates to a silicon-based negative electrode material and a preparation method and application thereof. The silicon-based negative electrode material comprises the following raw materials: a non-metal silicon-containing material, a lithium source and an ionic liquid, the melting point of the ionic liquid is lower than that of the metal lithium. Lithium in the silicon-based negative electrode material exists in at least one structural form of a Li2SiO3 phase, a Li2Si2O5 phase and a Li4SiO4 phase, and the silicon-based negative electrode material is a pre-lithiated negative electrode material, has relatively high initial coulombic efficiency and reversible capacity, and is long in cycle life and stable in processing performance. The ionic liquid has the effects of a dispersing agent and a grinding aid, so that the problems that metal lithium with relatively high viscosity and ductility is agglomerated in the ball milling process to form powder blocks and is adhered to the wall of a ball milling tank and the like are effectively avoided, the pre-lithiation of the silicon-based negative electrode material is more uniform, and the first coulombic efficiency and long cycle stability of the silicon-based negative electrode material are ensured.

The invention provides a preparation method of a graphene functionalized silicon-based probe. According to the graphene functionalized silicon-based probe provided by the invention, the ionic liquid is adopted to perform carbonization pretreatment on the probe sample, and the carbon layer plated on the surface of the probe in advance is utilized to protect the silicon-based probe tip, so that the reaction between the metal coating and the silicon-based probe is effectively avoided in the high-temperature quenching process of graphene growth; therefore, graphene successfully grows on the surface of the probe, the appearance of the tip of the probe is maintained, the surface of the tip is flat, and the diameter of the tip is nano-sized. The graphene functionalized silicon-based probe prepared by the method has excellent tip sharpness, conductivity and oxidation resistance.