7220 results about "Imide" patented technology

The invention belongs to the technical field of gel materials, and particularly relates to aerogel powder for polyolefin modification and a preparation method and application thereof. The preparation method of the aerogel powder comprises the following steps: (1) preparing aramid nanofiber dispersion liquid; (2) preparing a polypyrrole coated aramid nanofiber dispersion liquid; (3) mixing polyamide acid and the polypyrrole coated aramid nanofiber dispersion liquid, and then carrying out partial imidization and solvent exchange to prepare hydrogel; and (4) carrying out freeze drying, thermal imidization and crushing to obtain the aerogel powder for polyolefin modification. The aerogel powder is a porous solid material formed by forming one-dimensional composite fibers from aramid nanofibers and polypyrrole and combining the one-dimensional composite fibers with polyimide resin. The aerogel powder and polyolefin resin are compounded to obtain the polyolefin resin composite material with high strength and antistatic property, and the polyolefin resin composite material can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention provides a lithium manganese iron phosphate battery. The battery comprises a positive pole piece, a negative pole piece and a non-aqueous electrolyte, the positive pole piece comprises a positive active material and a positive active coating arranged on at least one surface of the positive active material; the positive electrode active material comprises lithium manganese iron phosphate LiMnxFe1-xPO4 coated with a carbon coating layer, and x is more than or equal to 0.5 and less than or equal to 0.8; the negative pole piece comprises a negative active material and a negative active coating arranged on at least one surface of the negative active material; the battery satisfies the following relational expressions: 4.5 < = (a / 20 + d) / (b + c) < = 12.8; a is a coated diaphragm resistor of the positive pole piece; b is the compaction density of the positive pole piece; c is the mass percentage content of vinylene carbonate in the positive electrode slurry; and d is the mass percentage content of the lithium bis (fluorosulfonyl) imide in the non-aqueous electrolyte. By optimizing the composition of the lithium ion battery, the low-temperature discharge performance of the battery is improved, and meanwhile, the high-temperature cycle performance is considered.

The invention relates to the technical field of environmental materials and water treatment, in particular to a graphene amino silica gel composite adsorbent for heavy metal wastewater treatment and a preparation method thereof.The graphene amino silica gel composite adsorbent is prepared from # imgabs0 nanoparticles, an amino-functionalized silicon dioxide coating layer, carboxylated reduced graphene oxide, a polydopamine modification layer and tetraethyl orthosilicate; the coating is prepared from the following raw materials: 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, N-((4-vinyl benzyl) amino) diacetic acid, chitosan, beta-cyclodextrin, hexadecyl trimethyl ammonium bromide, polyethylene glycol, L-ascorbic acid, 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide. The composite adsorbent shows excellent adsorption performance on various heavy metal ions, and the adsorption performance is far higher than that of traditional adsorption materials and existing composite adsorbents.

The invention relates to the technical field of catalysts, and discloses a preparation method and application of a copper-based metal-organic framework catalytic material.The preparation method comprises the following steps that S1, cuprous salt, N, N '-bis (5-aminonicotinyl) naphthalimide and a solvent are mixed, and a mixture is obtained; s2, heating the mixture to a reaction temperature, carrying out a constant-temperature reaction, and cooling to obtain a crystal; and S3, washing and drying the crystal to obtain the copper-based metal-organic framework catalytic material. According to the preparation method of the copper-based metal-organic framework catalytic material provided by the invention, N, N '-bis (5-aminonicotinyl) naphthalimide is used as an organic ligand to prepare the copper-based metal framework Cu-PTD with N / O co-coordination, and the copper-based metal framework Cu-PTD has relatively strong electrocatalytic carbon dioxide reduction and electron transfer capabilities; and the catalyst has relatively high selectivity on electrocatalytic carbon dioxide reduction products.

The invention relates to a charge accumulation characteristic analysis method for a polyimide material, and the method comprises the steps: applying a multi-stress synergistic effect to the polyimide material based on the multi-stress state of the polyimide material in the electric field, temperature, mechanical stress and irradiation in a deep space environment; a dynamic charge migration model of the polyimide material under the multi-stress synergistic effect is constructed, and the charge accumulation characteristic of the polyimide material is analyzed. According to the invention, based on the multi-stress state of electric field, temperature, mechanical stress and irradiation of the polyimide material in a deep space environment, a multi-stress synergistic effect is applied to the polyimide material, so that the problem of distortion of traditional single-stress or pairwise combined stress measurement is solved; through a dynamic charge migration model, charge accumulation characteristics of the polyimide material under the action of an electric field, temperature, mechanical stress and irradiation are analyzed, and accurate prediction, regulation and control for researching the electrical performance of the polyimide material are realized.

The invention discloses a lithium battery polymer solid electrolyte membrane capable of rapidly polymerizing at room temperature as well as a preparation method and application thereof, and belongs to the field of polymer electrolyte. The preparation method of the lithium battery polymer solid electrolyte membrane provided by the invention comprises the following steps: uniformly mixing polyethylene glycol methyl ether methacrylate and acrylonitrile according to a preset proportion to obtain a blended solution; sequentially adding lithium bis (trifluoromethanesulfonimide), divinylbenzene and benzoin diethyl ether into the blended solution, and uniformly mixing to obtain a precursor solution; and coating the precursor solution, and carrying out ultraviolet curing to obtain the lithium battery polymer solid electrolyte membrane. According to the lithium battery polymer solid electrolyte membrane provided by the invention, the voltage withstanding characteristic and the high ion conduction performance of the polymer electrolyte can be simultaneously improved, and the lithium battery polymer solid electrolyte membrane has a great gain on battery circulation and stability.

The invention relates to the technical field of all-solid-state lithium metal batteries, in particular to a cellulose paper-based polymer solid electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing N-methylacetamide and lithium bis (trifluoromethanesulfonyl) imide to obtain a eutectic solvent; the preparation method comprises the following steps: mixing a eutectic solvent, polyethylene glycol oxalate, acrylamide and a thermal initiator to obtain a eutectic polymer electrolyte precursor; and soaking cellulose paper in the eutectic polymer electrolyte precursor, and carrying out hot-pressing polymerization to obtain the cellulose paper-based polymer solid electrolyte. The cellulose paper-based polymer solid electrolyte prepared by the invention is soft in texture and can be better attached to an electrode, the problem of poor contact between the electrode and an electrolyte interface is solved, and the interface impedance is reduced by fusing the characteristics of low viscosity and high conductivity of the eutectic solvent and the supporting effect of the cellulose paper; the ion transmission efficiency is improved, and conditions are provided for long-term stable circulation of the battery.

The invention discloses a preparation method and application of a water-based polyamide acid sizing agent, and belongs to the technical field of sizing agents. The method comprises the following steps: synthesizing polyamic acid in an organic solvent by adopting dianhydride and diamine in a polymerization manner, after the reaction is finished, cooling a polyamic acid solution to room temperature, transferring into a dropping funnel, dropwise adding into a solvent of which the volume is 10-25 times that of the solution, separating, completely dropwise adding, collecting a precipitate, and drying to obtain solid polyamic acid; and adding a low-grade ester or low-grade ketone solvent into the deionized water, adding the polyamide acid powder into the mixed solvent according to the solid content of 1-20wt.%, stirring at room temperature until the solid disappears, and standing for liquid separation to obtain a lower layer which is the polyamide acid water-based sizing agent. The sizing agent disclosed by the invention shows excellent dispersity and long-term stability. After sizing, polyamide acid on the surface of the carbon fiber is converted into polyimide through a thermal imidization reaction, so that the carbon fiber has high thermal stability and excellent compatibility.

The invention provides a preparation method of an h-BN / PI high-temperature-resistant anticorrosive coating, and relates to the technical field of polymer composites.The preparation method of the h-BN / PI high-temperature-resistant anticorrosive coating comprises the steps that under the protection of inert atmosphere, aromatic diamine containing impurity element five-membered rings and aromatic dianhydride containing ether bonds are taken and subjected to a polymerization reaction in a polar aprotic solvent, and the h-BN / PI high-temperature-resistant anticorrosive coating is obtained. A polyamide acid solution is obtained; performing ultrasonic-assisted liquid phase stripping on the micron-sized hexagonal boron nitride to obtain single-layer hexagonal boron nitride; adding the single-layer hexagonal boron nitride into the polyamide acid solution for multiple times, and uniformly stirring to obtain a hexagonal boron nitride / polyimide composite solution; and coating the hexagonal boron nitride / polyimide composite liquid on a to-be-coated surface, and carrying out gradient heating curing to obtain the h-BN / PI high-temperature-resistant anticorrosive coating. The h-BN / PI high-temperature-resistant anticorrosive coating based on interaction of multiple hydrogen bonds has relatively good high temperature resistance, relatively good resistance mechanical property and excellent corrosion resistance.

Provided in the present invention is a polyester polymer containing a cyclic imide structure. A cyclic imide side group or side chain is introduced into a polyester polymer by means of a diacid monomer or a diol monomer, thereby overcoming the defects of the polyester polymer being hard and brittle, improving the comprehensive mechanical properties of toughness, etc., thereof, and improving the heat resistance of the polyester polymer.

The invention belongs to the technical field of high-temperature-resistant coatings, and particularly relates to a core-shell polyimide-based high-temperature-resistant water-based coating and a preparation method thereof. Comprising the following components in percentage by mass: 35-38% of a core-shell emulsion; the core layer is polyimide resin; the transition layer is an organic silicon emulsion modified by 5, 6-dimethyl benzimidazole and a silane coupling agent KH-550; the shell layer is made of polyamide-imide resin; 28%-32% of a modified high-temperature filler; 6%-7.5% of a functional auxiliary agent; and the balance of deionized water. Through core-shell emulsion gradient design, multi-scale filler cooperation and a low-temperature gradient curing process, the high temperature resistance, the adhesive force and the environmental protection property of the coating are improved.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The invention relates to the technical field of dielectric materials, and discloses polyimide, a polyimide film and a preparation method and application thereof, the polyimide is obtained by a polymerization reaction of a dianhydride monomer and a diamine monomer, the diamine monomer comprises a methylene bridging group and a phenyl group with a substituent group, and the methylene bridging group is a phenyl group with a substituent group. The substituent group at least comprises one methyl group. The molecular twisted conformation lock structure provided by the invention not only can improve the tolerance of polyimide, but also can doubly inhibit intrachain and inter-chain charge migration of the dielectric film, so that the dielectric film still has extremely high energy storage density and energy storage efficiency at a service temperature close to a glass-transition temperature.

The invention relates to a fluoride-free polyimide-based film and a preparation method thereof. The method comprises the following steps: S1, preparing a polyamide acid solution; s2, fluorine-free organic silicon serving as a modifier is added into the polyamide acid solution and dispersed, a blended spinning solution is formed, and the solubility parameter difference value of the fluorine-free organic silicon and polyamide acid is 2.0 (MPa) 1 / 2 or below; s3, carrying out electrostatic spinning on the blended spinning solution to form a polyamide acid-based nanofiber layer; and S4, carrying out thermal imidization on the polyamide acid-based nanofiber layer to obtain the fluoride-free polyimide-based film. The film has a structure formed by three-dimensional cross-linking and winding of polyimide-based nanofibers, and the polyimide-based nanofibers are composed of a polyimide base material and fluorine-free organic silicon dispersed in the polyimide base material. The method does not involve fluorine-containing raw materials, and is environment-friendly and high in process compatibility. The film provided by the invention has excellent waterproofness, air permeability and mechanical properties at the same time.

The invention relates to the technical field of PET geothermal films, and discloses a high-temperature-resistant geothermal film and a preparation method thereof.The high-temperature-resistant geothermal film is obtained through blending extrusion and blow molding of polyethylene glycol terephthalate, carboxyl polyetherimide and modified graphene. The carboxyl polyetherimide contains a benzoate structural unit similar to PET, the carboxyl polyetherimide and the benzoate structural unit form an alloy-like system with good compatibility, the modified graphene is good in dispersity and excellent in compatibility with PET, meanwhile, the modified graphene contains more carboxyl groups, and the carboxyl groups and carboxyl groups of side chains of the carboxyl polyetherimide interact with each other to form hydrogen bonds and the like; the graphene can be uniformly dispersed in a composite system of PET and carboxyl polyetherimide, so that a better reinforcing effect is achieved, and the tensile strength and the elongation at break of the PET composite geothermal film are remarkably improved. After high-temperature thermal aging, the geothermal film is high in retention rate of tensile strength and elongation at break and good in high-temperature resistance.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, the electrode assembly comprises a positive pole piece, the positive pole piece comprises a positive active material layer, and the positive active material layer comprises lithium-containing phosphate of an olivine structure; the electrolyte comprises, by mass, 8-30% of a carboxylic ester solvent, a lithium salt and an unsaturated ester additive, the lithium salt comprises lithium hexafluorophosphate and fluorine-containing lithium sulfimide, the mass content of the fluorine-containing lithium sulfimide in the lithium salt is 18-45%, the mass content of the unsaturated ester additive in the electrolyte is 0.05-5%, and the mass content of the unsaturated ester additive in the electrolyte is 0.05-5%. The unsaturated ester additive comprises one or more of vinylene carbonate, vinylethylene carbonate, allyl ethyl carbonate and a fluoro-carbonate additive; the amount of electrolyte in the battery cell is 2.8 g / Ah to 3.2 g / Ah. According to the invention, rapid charging and use reliability of the single battery can be considered.

The invention provides a preparation method and application of a wear-resistant polyimide material, and the preparation method comprises the following steps: S1, adding a polyimide material into an alkali solution for reaction, cleaning reactants with acid and ethanol, and drying to obtain an activated polyimide material; s2, adding the activated polyimide material into a silane coupling agent solution for reaction, cleaning reactants with ethanol and water, and drying to obtain a modified polyimide material with silicon-oxygen bond active sites on the surface; s3, adding the modified polyimide material with silicon-oxygen bond active sites on the surface into a modified epoxy resin solution, adjusting the pH value to be acidic, and reacting to obtain the wear-resistant modified polyimide material, wherein the modified epoxy resin solution is obtained by reacting a silane coupling agent with acrylate. According to the method, the wear resistance of the polyimide can be improved on the premise that other properties of the polyimide material are not influenced.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention discloses a preparation method of a high-temperature-resistant high-strength polyimide composite material, and relates to the technical field of polyimide composites.The preparation method comprises the following preparation steps that S1, a customized silane coupling agent is prepared; s2, preparing a bionic dynamic interface modified reinforcing filler, wherein the modified reinforcing filler is synergistically modified through a bionic coating and a customized silane coupling agent; and S3, preparing a polyimide precursor solution containing the dynamic network. According to the preparation method of the high-temperature-resistant high-strength polyimide composite material, through the integrated design of'customized silane coupling agent + bionic dynamic interface modification + dynamic network-containing polyimide precursor + gradient hot-pressing curing ', the glass-transition temperature of the prepared composite material is greater than or equal to 335 DEG C, the tensile strength is greater than or equal to 208 MPa, and meanwhile, the thermal repair efficiency at 180-250 DEG C is greater than or equal to 87%; the technical bottleneck that high temperature resistance, mechanical strength and repairing performance of the material are difficult to consider at the same time in the prior art is solved.

According to the aromatic polyester containing the cyclic imide structure, a cyclic imide side group or side chain is introduced into the aromatic polyester through a diacid monomer or a diol monomer, so that the defects that the aromatic polyester is low in mechanical strength and poor in film-forming supporting performance are overcome; by introducing an imide structure, the polarity of the polymer is improved, and the rear-end blending modification capability is improved, so that the comprehensive mechanical property of a polyester product is improved.

The invention belongs to the field of advanced materials, and particularly relates to polyimide resin with low curing temperature and high heat resistance and a preparation method thereof. According to the invention, pararosaniline is introduced into the molecular chain structure of the phenylacetylene-terminated polyimide resin, and the curing temperature of the phenylacetylene-terminated polyimide resin is reduced by changing the spatial distortion degree of the polyimide molecular chain and introducing free radicals to catalyze the curing process. The polyimide resin can be cured and molded at a relatively low temperature, and keeps excellent heat resistance and mechanical properties. The forming temperature of the high-performance polyimide and the composite material thereof is effectively reduced, so that the manufacturing difficulty and cost are reduced, and the preparation method has important application prospects.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention belongs to the technical field of lithium metal batteries, and relates to the technical field of artificial SEI layers, in particular to a dynamic self-adaptive polymer artificial SEI layer based on a DA bond and preparation and application thereof. Linear polyurethane serves as a framework, a dynamic DA bond is introduced into a polymer system, a topological network structure is formed through in-situ reaction of the linear polyurethane and bismaleimide on the surface of a lithium metal negative electrode, and therefore the artificial SEI layer based on the DA bond is prepared. The artificial SEI layer is a three-dimensional topological structure polymer material with a dynamic adaptive characteristic. A DA dynamic covalent bond and a hydrogen bond introduced into the structure endow the artificial protection layer with excellent mechanical properties and dynamic characteristics, so that the artificial protection layer can adapt to the volume change of a lithium metal negative electrode in a battery cycle process, thereby realizing long-term stability of the electrode, and remarkably improving the safety and electrochemical performance of the lithium metal battery. Therefore, the invention provides an innovative method for preparing the novel artificial SEI layer.

The invention provides a polyimide multilayer composite membrane material as well as a preparation method and application thereof, and belongs to the technical field of gas separation. According to the method, through collaborative design of a functional support layer, a gradient MOF layer and an ultrathin selection layer structure, the problems of support layer pore seepage, MOF agglomeration, weak interface bonding and the like in an existing composite membrane material are solved. The preparation method comprises the following steps: firstly, carrying out electrostatic spinning on a polyamide acid glue solution, and synchronously introducing dopamine by adopting a chemical imidization method to prepare a functionalized polyimide fiber membrane containing hydroxyl and amino on the surface, so that the mechanical property of a supporting layer and the MOF anchoring capability are remarkably improved; growing MOF layers with different particle sizes on the surface of the fiber membrane by regulating and controlling the concentration gradient of ligand / metal salt and the reaction time, and passivating through a silane coupling agent after each step of growth so as to avoid heterogeneous nucleation and construct a gradient structure; after the MOF gradient layer is subjected to Ar plasma pretreatment to introduce hydroxyl, the ultrathin polyamide selection layer is formed by utilizing interfacial polymerization of fluorine-containing acyl chloride and a macrocyclic amine monomer, and the ultrathin polyamide selection layer is suitable for gas separation work.

The present application relates to the technical field of polyimides and relates to a preparation method for a high-performance polyimide and an application thereof, aiming to solve the problems in the prior art such as numerous side reactions and severe impact on transparency caused by an excessively high imidization reaction temperature during the use of a high-temperature thermal imidization method for the preparation of polyimides. The preparation method comprises: (1) preparing a polyamic acid solution; (2) adding a chemical catalyst and a polyamic acid solution to partially complete an imidization reaction; (3) adding an end group auxiliary agent, performing coating with the solution, heating, and maintaining the heat to complete the imidization reaction; and (4) carrying out high-temperature treatment to obtain a high-performance polyimide. The present application can significantly reduce numerous side reactions present in a traditional imidization reaction, eliminate an adverse effect of high-temperature imidization on the optical performance, greatly improve the mechanical properties, heat resistance, optical performance, etc. of a material, and also achieve both high heat resistance and high transparency.

The invention relates to a foam material, in particular to a polyimide / ionic liquid composite foam material and a preparation method thereof. The polyimide (PI) polymer with a rigid molecular structure and high temperature resistance is successfully synthesized, meanwhile, high-compatibility ionic liquid (ILs) molecules are introduced into adjacent PI molecular chains, the polyimide / ionic liquid composite foam material is formed through supercritical foaming, the foaming capacity is remarkably improved, and the polyimide / ionic liquid composite foam material has excellent performance.

Provided is a liquid crystal alignment film which suppresses AC afterimage at a high level and which reduces charge accumulation and flicker due to backlight. The liquid crystal aligning agent contains the following polymer (A) and polymer (B). The polymer (A) is selected from the group consisting of polyimide precursors having formula (A1) and polyimides that are imides of the polyimide precursors. The polymer (B) is selected from the group consisting of polyimide precursors of formula (B1) and polyimides that are imides of the polyimide precursors, and the proportion of tetravalent organic groups represented by formula (X-10) is 40 mol% or more with respect to the total of 1 mol of tetracarboxylic acid residues of the polymer (B). # imgabs0 # (wherein the meaning of each symbol in the formula is as defined in the description. ) # imgabs1 # (* represents a bond).

The invention provides a crystalline supramolecular polymer based on snap ring aromatic hydrocarbon. The polymer is obtained by self-assembling snap ring aromatic hydrocarbon (CLP) and a naphthalimide derivative (NDI-8) through a subject and an object. The crystalline supramolecular polymer (NDI-8 (at) CLPalpha) can fully utilize the synergistic effect of a plurality of weak interactions, so that the charge transfer interaction between molecules can be remarkably enhanced very easily. The crystalline supramolecular polymer constructed based on charge transfer shows excellent gasochromic performance. The p-xylene in the NDI-8-coated CLPalpha p-xylene isomer has efficient identification and detection capability, the color is changed from purple to light pink, and a wide application prospect is provided for the development of stimuli-responsive materials.

The invention belongs to the technical field of new materials, and discloses a polyolefin dissolving agent as well as a preparation method and application thereof. The cleaning agent is composed of modified long-carbon-chain imidazole dinitrile amine salt, modified long-carbon-chain imidazole long-carbon-chain anion salt, betaine salt, imidazole acetate, imidazole long-carbon-chain anion salt, quaternary ammonium long-carbon-chain anion salt, imidazole bis (fluorosulfonyl) imide salt, imidazole hexafluorophosphate and long-carbon-chain anion and cation liquid. Under the condition of 180-210 DEG C, polyolefin (PP or PE) with the molecular weight of 50-8 million can be dissolved by adopting the polyolefin dissolving agent disclosed by the invention, and effective extrusion can be realized by adopting a twin-screw extruder after dissolution. After PP / PE powder is dissolved by adopting the polyolefin dissolving agent disclosed by the invention, sheet casting or spinning is carried out, casting sheets or PP / PE fibers are washed by using ethanol / dichloromethane / hydrocarbon / tetrachloroethylene to remove ionic liquid, and a polyolefin diaphragm or polyolefin fibers can be prepared.

The invention relates to the technical field of lithium batteries, in particular to a low-temperature electrolyte and a lithium battery containing the low-temperature electrolyte, the low-temperature electrolyte comprises the following components in percentage by mass: 75-85% of solvent, 11-18% of electrolyte salt and 0.5-2% of additive, the electrolyte salt comprises one or more of lithium hexafluorophosphate, lithium difluoro (oxalato) borate, lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethanesulfonyl) imide, and the additive comprises a film-forming agent, a low-temperature reinforcing agent and a dendritic crystal inhibitor. By optimizing the synergistic effect of the solvent system and the electrolyte salt, the freezing point and viscosity of the electrolyte are effectively reduced, the migration rate of lithium ions at low temperature is enhanced, and it is ensured that the battery can still be efficiently charged and discharged under the low-temperature condition.