1204 results about "Straight chain" patented technology

The invention belongs to the technical field of polymer insulating materials, and particularly discloses a high-toughness and high-insulating-strength epoxy insulating material and a preparation method thereof. Single-end amine-terminated straight-chain alkyl groups with different chain lengths in a specific molar ratio are grafted to fluorine-containing epoxy resin to construct a side chain structure, and then a step curing process is adopted to form a three-dimensional cross-linked network with a curing agent under the action of an accelerant. The fracture toughness is remarkably improved by utilizing an epoxy body chain extension effect in a side chain grafting process and a uniform microphase separation structure formed by self-assembly of a long alkyl side chain in a curing process; meanwhile, through the synergistic effect of steric hindrance of a short alkyl side chain and a fluorine atom charge trap, delocalized electron transmission of a benzene ring conjugated structure is inhibited, and the insulating property is synchronously enhanced. Compared with a traditional toughening technology, insulation deterioration caused by toughening modification is effectively avoided, and an epoxy resin material with mechanical reliability and insulation stability is provided for high-voltage electrical equipment.

A rubber coating for a radiofrequency identification device for a tyre characterized in that it comprises: (a) 100 phr of at least one diene-based elastomer; (b) at least one chemical according to formula (1) wherein the chemical comprises in its structure at least the structure of the 2,2′-methylenediphenol, and wherein the 2,2′-methylenediphenol may be substituted in ortho, para, meta position or any combination thereof with an aliphatic, linear or branched, hydrocarbon chain comprising from 1 to 10 C atoms, or may be polymerized in ortho, para, meta position or any combination thereof with one or more additional alkylphenol units. A radiofrequency identification (RFID) module for a tyre comprising a radiofrequency identification device surrounded by a rubber coating, a tyre or a tyre retread comprising such radiofrequency identification module, and use of a rubber coating for surrounding a radiofrequency identification device.

A photosensitive surface treating agent containing a compound represented by the following Formula (M1). In Formula (M1), R1 is a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms, Y1 is a linear or branched alkylene group having 1 to 4 carbon atoms or a single bond, and the terminal carbon atom of the alkyl group for R1 may be bonded to a carbon atom constituting the alkylene group for Y1, and R1 and Y1 may form a ring. R2 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R3 and R4 are each independently an alkyl group having 1 to 3 carbon atoms, n0 is an integer of 0 or more, and X is a halogen atom or an alkoxy group.

The invention relates to coating agents containing A) at least one polyol component, B) at least one crosslinking component which is obtained by reacting at least one polyisocyanate with at least one amino functional alkoxy silane and which comprises free and / or blocked isocyanate groups, optionally (C) at least one catalyst for crosslinking silane groups, and D) optionally additional auxiliary agents and additives. The invention is characterized in that the polyol component A) comprises at least one polyester polyol A1) that has been produced using a 2,2,4,4-tetraalkylcyclobutane-1,3-diol (TACD) of the general formula (I), in which independently of one another the groups R1, R2, R3, and R4 represent linear or branched alkyl groups with up to 8 carbon atoms. The invention additionally relates to the use of the coating agents and to substrates which are coated with the coating agents according to the invention.

The present invention discloses a method for preparing a hydroxy-deuterated linear alcohol. The method uses a carbonate as a substrate and heavy water as a deuterium source to carry out a deuteration reaction in the presence of a base catalyst to obtain the hydroxy-deuterated linear alcohol. The method achieves a high degree of deuteration, a high yield, and produces only CO2 as a byproduct.

An organometallic complex is represented by general formula (1).M is Pd or Pt. B-A-B is a tetradentate ligand formed by bonding a ring A to rings B. The ring A is a hydrocarbon aromatic ring or heteroaromatic ring that may have a substituent, and is selected from a benzene ring, etc. The substituent that the ring A may have is selected from a linear or branched C1 to C6 alkyl group, etc. Each of the rings B is a monocyclic heteroaromatic ring that may have a substituent, and is selected from a pyridine ring, etc. The substituent that the ring B may have is selected from a linear or branched C1 to C6 alkyl group, etc. Each X-Y is a bidentate ligand, and atoms bonded to M are selected from C, N, and O atoms. The two bidentate ligands do not bond together.

The invention provides an organic compound and application thereof, the boron-containing organic compound has a structure as shown in formula (1), Z1, Z2, Z3, Z4 and Z5 are respectively and independently CR01 or N, ring A and ring D respectively represent ring structures in fused connection, and a dotted line represents a position of an optional fused bond; ring B is fused through positions Z3 and Z4 or Z4 and Z5; the ring A, the ring B and the ring D are respectively and independently selected from one of an unsubstituted or R ''substituted C6-C60 aromatic ring and an unsubstituted or R'' substituted C3-C60 heteroaromatic ring; the ring A and the ring D are not connected or are connected through a chemical bond; r1 and R2 are respectively and independently one of hydrogen, unsubstituted or R ''substituted C1-C20 straight chain or branched chain alkyl, unsubstituted or R'' substituted C3-C20 cycloalkyl, unsubstituted or R ''substituted C4-C20 alkylsilyl, unsubstituted or R'' substituted C1-C20 alkoxy, unsubstituted or R ''substituted C6-C60 aryl, and unsubstituted or R'' substituted C3-C60 heteroaryl; r1 and R2 are not connected into a ring through a chemical bond, and at least one of R1 and R2 is selected from one of unsubstituted or R ''substituted C6-C60 aryl and unsubstituted or R'' substituted C3-C60 heteroaryl; and X is selected from the group consisting of CR11R12, SiR13R14 or N-Ar1. The compound disclosed by the invention has the properties of multiple resonance molecules and conjugated molecules, namely has a narrow fluorescence emission spectrum and high quantum efficiency, and can effectively improve the luminous efficiency and prolong the service life of an organic electroluminescent device when being applied to the organic electroluminescent device. # imgabs0 #

The invention relates to the technical field of lubricating oil, and discloses a low-temperature-resistant lubricating oil composition and a preparation method thereof. Mineral oil, modified polymethacrylate, a dispersing agent, an antioxidant and an oil defoaming agent are stirred and mixed and then filtered, and the low-temperature-resistant lubricating oil composition is obtained. The cross-linking agent enables polymethacrylate to form a light cross-linked structure, and stress can be dispersed during shearing; nitrogen atoms in triazinyl, pyridyl, pyrrolidone and Mannich base structures serve as hydrogen bond receptors, the hydrogen bond interaction with hydroxyl on a polymethacrylate molecular chain is enhanced, a physical cross-linked network is formed, and the shear resistance is further improved; in the modified low-temperature-resistant monomer, the glass-transition temperature can be remarkably reduced by high flexibility of silicon oxygen bonds in long straight-chain alkyl and silane groups, so that a molecular chain can still move at a low temperature, and the low-temperature fluidity of the lubricating oil is improved; the cyclic structure of cyclohexyl can effectively interfere with the ordered arrangement of wax crystals, reduce the pour point of the lubricating oil and improve the low-temperature fluidity.

The invention provides a fluorosilane modified gemini surfactant and a preparation method thereof, a resistance reducing agent and a preparation method thereof, and a polymer fracturing fluid. The fluorosilane modified gemini surfactant has a structure as shown in a formula I, wherein R1 is selected from one or a combination of more than two of saturated alkyl, alkylaryl, alkylalkyloxy, alkylacyl and unsaturated alkyl with 1-8 carbons, and R2 is selected from one or a combination of more than two of alkyl, alkylaryl, alkylalkyloxy, alkylacyl and unsaturated alkyl with 1-8 carbons; (CF2) the number of n in n is 1 to 18; x <-> is Br <-> and / or I <->; and R2 is selected from one or a combination of more than two of straight-chain saturated alkyl, branched-chain saturated alkyl, alkylaryl, alkylalkoxy, alkyl ester group and unsaturated alkyl with 1-8 carbons. According to the invention, the fluorosilane modified gemini surfactant is used as a hydrophobic monomer of the resistance reducing agent, so that the synthesized resistance reducing agent has a single-head and double-tail gemini surfactant structure, the tackifying and sand-carrying capabilities are improved, and the surface and interface tension of a gel breaking solution and reservoir rocks is reduced.

The invention provides an ultra-thin glass UTG (Untranslated Glass) protective coating and flexible electronic product glass containing the protective coating. The protective coating comprises a network polymer with the following structural formula (I), the network polymer is provided with a plurality of acrylate modified polyurethane chains and a plurality of carbon chains, the acrylate modified polyurethane chains and the carbon chains are alternately connected to form a network, the carbon chains are straight chains or branched chains, and the lengths of the carbon chains are the same or different. According to the protective coating, the impact resistance of the ultrathin glass can be improved by more than 200%, and the ultrathin glass has excellent visible light transmittance (greater than or equal to 91.5%), low haze (less than 1%), high pencil hardness (greater than 2H) and good adhesive force and wear resistance. In the structural formula (I), m is an integer from 1 to 10000, and each group is defined in the specification.

The present invention relates to a method for exchanging heat with an object said method comprising using a heat transfer fluid wherein said heat transfer fluid comprises one or more chemical compounds having the general formula (I) wherein: —Rf can be any C1-C10 fluorinated linear or branched carbon chain which can be partially or fully fluorinated, and can comprise O or S atoms, —X, Y and Z can be independently selected from halogens or hydrogen, with the provision that at least one of X, Y or Z is a halogen.

The present invention provides an electronic or electrical device or component thereof comprising a cross-linked polymeric coating on a surface of the electronic or electrical device or component thereof; wherein the cross-linked polymeric coating is obtainable by exposing the electronic or electrical device or component thereof to a plasma comprising a monomer compound and a crosslinking reagent for a period of time sufficient to allow formation of the cross-linked polymeric coating on a surface thereof,wherein the monomer compound has the following formula:where R1, R2 and R4 are each independently selected from hydrogen, optionally substituted branched or straight chain C1-C6 alkyl or halo alkyl or aryl optionally substituted by halo, and R3 is selected from:where each X is independently selected from hydrogen, a halogen, optionally substituted branched or straight chain C1-C6 alkyl, halo alkyl or aryl optionally substituted by halo; and n1 is an integer from 1 to 27; and wherein the crosslinking reagent comprises two or more unsaturated bonds attached by means of one or more linker moieties and has a boiling point at standard pressure of less than 500° C.

This invention relates to a polyurethane microcapsule emulsion, its preparation method, and its application. The raw materials for preparing the polyurethane microcapsule emulsion, by weight, include: 30-50 parts of unsaturated polyester polyol, 10-25 parts of isocyanate monomer, 3-6 parts of hydrophilic monomer, 2-5 parts of small molecule alcohol chain extender, 1.5-5 parts of neutralizing agent, 0.1-0.5 parts of organometallic catalyst, 20-50 parts of organic solvent, 5-15 parts of pesticide active ingredient, 3-10 parts of C6-C15 straight-chain or branched-chain olefin monomer, 0.1-0.5 parts of initiator, and 100-160 parts of water. The polyurethane microcapsule emulsion provided by this invention solves the problems of low crosslinking density, simple structural topology, insufficient hydrophobicity, and poor encapsulation stability of existing pesticide microcapsules, improving the controlled-release performance, capsule wall density, and emulsion system stability of the polyurethane microcapsule emulsion.

The invention relates to a straight-chain olefin skeleton isomerization method, which is characterized in that under isomerization conditions, a catalyst containing a BUCT-10 molecular sieve and straight-chain olefin are subjected to a contact reaction to realize conversion to isoolefin rich in methyl branched chains, the BUCT-10 molecular sieve has a one-dimensional ten-membered ring straight pore channel, the pore opening is in an oval shape, and the BUCT-10 molecular sieve is provided with a one-dimensional ten-membered ring straight pore channel. The characteristic size of the pore diameter is about # imgabs 0 # imgabs 1 #; and the skeleton consists of phosphorus and aluminum elements isometrically substituted by heteroatoms, and has moderate-strength Bronsted acidity. The method provided by the invention has the following remarkable advantages: (1) the initial selectivity of isoolefin is high; (2) the isoolefin yield is high; and (3) the catalyst is long in service life.

The present invention discloses an organic electron acceptor containing a carbazole side chain and its application in solar cells. The organic electron acceptor containing a carbazole side chain has a structure shown in the following formula: #imgabs0# wherein R1 and R2 are independently a linear or branched alkyl group containing 1-18 carbon atoms, and A is an electron-withdrawing functional group. The present invention uses a non-fully fused ring structure based on trithiophene as the central conjugated skeleton of the organic electron acceptor, introduces a carbazole group as a side chain, prevents excessive elevation of the molecular HOMO energy level, and inhibits the internal rotation between the trithiophene rings connected by single bonds through its rigid large steric effect, thereby ensuring the planarity of the acceptor molecule, regulating the stacking between molecules, and simultaneously inhibiting the aromatic amine group from inducing the molecular skeleton to form a quinone structure, thereby improving the molecule's resistance to photooxidation.

This nonspecific reaction inhibitor is a copolymer containing a first repeating unit represented by formula (1) and a second repeating unit represented by formula (2). In formula (1), R1, R2, and R3 are each independently a hydrogen atom or a methyl group, X is NH or an oxygen atom, Y is SO3 - or COO-, and Yn and m are each independently an integer from 1 to 5. In formula (2), R4 is a hydrogen atom or a methyl group, Z is NH or an oxygen atom, and A is a linear or branched alkyl group with 12 to 40 carbon atoms.

The invention belongs to the field of petrochemical engineering, and discloses a bimetallic Ni-Pt / RFE hydroisomerization catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving a nickel precursor in water, stirring until clarification, and dropwise adding ammonia water to obtain a mixed solution 1; rFE is added into the mixed solution 1, the pH value is adjusted to be 9-11.5, suction filtration, washing and drying are conducted after stirring, and Ni / RFE is obtained; dissolving a platinum precursor in water, stirring until the solution is clear, and dropwise adding ammonia water to obtain a mixed solution 2; and adding the Ni / RFE into the mixed solution 2, adjusting the pH value to 9-11.5, stirring, and carrying out suction filtration, washing, drying and roasting to obtain the Ni-Pt / RFE. The method is simple and convenient to operate and mild in condition, the catalyst activity and the isomerization efficiency are remarkably improved through the synergistic effect of Ni and Pt, the catalyst preparation cost is greatly reduced while the use amount of precious metal is reduced, efficient conversion of long straight-chain alkane can be achieved, and the isomerization conversion rate of n-dodecane within 60 minutes can reach nearly 90%.

Disclosed is a block copolymer which is an AB diblock copolymer having a first block A of structure (I) and a second block B of structure (II) wherein R and Ri are independently selected from C-1 to C-4 alkyl groups wherein the mol% range of the repeating units of structure (I) is about 35 mol% to about 94 mol% and the mol% range of the repeating units of structure (II) is about 6 mol% to about 65 mol%, r2 is selected from C-1 to C-11 alkyl groups, L is C-5 to C-12 linear alkylene groups, and R3 is selected from C-3 to C-8 linear alkyl groups, R'is H or C-3 to C-8 linear alkyl groups, where the block copolymer has a polydispersity of from 1 to about 1.31. Also described are compositions of such block copolymers in solvents and their use in DSA treatments. # imgabs0 #

The invention provides an aqueous zinc ion battery electrolyte, a preparation method thereof and a zinc ion battery, and belongs to the technical field of aqueous zinc ion batteries. The aqueous zinc ion battery electrolyte comprises an additive, an inorganic zinc salt and a solvent, the additive comprises at least one of trimethylamine substituted by 1-3 substituent groups, benzene and C3-C10 straight-chain alkane, and the substituent groups comprise phosphonic acid groups or phosphinic acid groups; the solvent comprises a sodium chloride aqueous solution. By adopting the additive with a specific structure and the solvent containing the sodium chloride aqueous solution, the cycle performance of the zinc negative electrode in the water-based zinc ion battery can be remarkably improved, and the service life of the water-based zinc ion battery is prolonged.

The invention discloses a preparation method of fluoroether, an electrolyte, a battery and a power utilization device. The invention relates to the technical field of batteries, in particular to a preparation method of fluoroether, an electrolyte, a battery and a power utilization device. The preparation method of the fluoro-ether comprises the following steps: reacting a metal fluoride solution with a carbonyl compound and an alkyl compound to obtain the fluoro-ether, wherein the fluoroether has a simple structural formula as shown in a formula (I), and R1 is straight-chain or branched-chain alkane; r2 is fluoroalkane, wherein the number of fluorine atoms is 4. The invention provides a novel fluoro-ether synthesis route which can be carried out in a normal pressure environment, the process is simple, the post-treatment is simple, the yield of fluoro-ether is improved, side reactions are reduced, and the product is easy to separate.

The invention discloses a synthesis method of low-molecular-weight perfluoropolyether acyl fluoride, which comprises the following steps: hexafluoropropylene, oxygen, a catalyst and a fluorine-containing solvent are subjected to an oxidative polymerization reaction, the reaction liquid is subjected to light component removal and solvent removal to obtain the low-molecular-weight perfluoropolyether acyl fluoride, and the temperature of the oxidative polymerization reaction is 130-300 DEG C. According to the invention, hexafluoropropylene is used as a raw material and is oxidized by oxygen in a fluorine-containing solvent, so that low-component perfluoropolyether acyl fluoride is synthesized in one step. In the presence of a catalyst, formyl fluoride, trifluoroacetyl fluoride and hexafluoropropylene oxide continue to be added into an oligomer, and the oligomer is mainly perfluoropolyether acyl fluoride with a straight-chain structure. And when the reaction temperature is within the range, the smooth proceeding of the oxidative polymerization reaction can be ensured, the sharp rise of the reaction pressure caused by the overhigh reaction temperature can be avoided, and the model selection of reaction equipment is convenient.

The present invention provides a wax formulation that includes about 5 weight percent (wt %) to about 85 wt % of a natural oil-based petrolatum composition based on total weight of the wax formulation; and about 1 wt % to about 95 wt % of a wax material based on total weight of the wax formulation; wherein the natural oil-based petrolatum composition a triglyceride component containing a plurality of hydroxyl containing fatty acid chains and wherein a plurality of the hydroxyl containing fatty acid chains are esterified with a C8-C22 branched or straight chain fatty acid and wherein the natural oil-based petrolatum composition has a drop melting point measured by AOCS Standard Procedure Cc 18-80 of between 35 and 70° C.

A polyester polyol comprising structural units derived from: (a) a polyacid; and (b) a polyol mixture comprising: (i) a diol having a linear or branched hydrocarbon chain between two hydroxyl groups wherein the hydrocarbon chain has an odd number of carbon atoms from 3 to 19; (ii) a polyol having a cyclic structure; and (iii) 2, 2, 4, 4-tetraalkyl-1, 3-cyclobutanediol (TACD), and a process for producing the same.

The invention discloses high-elongation self-repairing polyurethane and a preparation method thereof, and the preparation method comprises the following steps: step 1, in an inert gas atmosphere, carrying out catalytic reaction on polyol and isocyanate in a solvent to prepare a polyurethane prepolymer; step 2, adding an imine chain extender and a trihydroxy cross-linking agent into the reaction solution, and carrying out chain extension reaction to obtain self-repairing polyurethane; according to the invention, a chain extender containing dynamic reversible imine bonds is adopted to carry out chain extension on a polyurethane prepolymer, and meanwhile, a trihydroxy cross-linking agent is adopted to construct a three-dimensional network structure, so that cross-linked polyurethane containing imine dynamic bonds is prepared. The imine bond can be quickly exchanged at room temperature, and after the imine bond is broken, the imine bond is different from a traditional straight-chain molecule but a branched molecule, so that the flow processing is better, the molecular chain collision probability is higher, the tensile elongation is better, and the self-repairing property is excellent at room temperature; and the prepared cross-linked polyurethane can have excellent self-repairing performance at room temperature.

The embodiment of the invention relates to the technical field of insulating adhesives, and discloses an insulating sealing coating adhesive which comprises 60-80 parts of a modified styrene-butadiene-styrene block copolymer, 0.3-1 part of a ketimine curing agent, 2-8 parts of an aromatic amine curing agent, 3-8 parts of methyl silicone oil and 12-26 parts of petroleum ether, wherein the modified styrene-butadiene-styrene block copolymer is obtained by epoxidation of a styrene-butadiene-styrene block copolymer (SBS), the molecular weight of the styrene-butadiene-styrene block copolymer is 7000-11000, the substance amount fraction of a PB end (polybutadiene chain segment) is 70-85%, and the ratio of a branched chain structure to a straight chain structure in the PB end is 1: 2-1: 3. The insulation sealing coating adhesive has the characteristics of high reliability and uniform coating in multiple axial directions, especially in the vertical direction (namely the z-axis direction) through the structural characteristics of the insulation sealing coating adhesive and the compounding of the insulation sealing coating adhesive and a multi-element curing agent, is convenient to spray and is beneficial to application to precise components.

Provided is a curable silicone composition and applications thereof. The curable silicone composition has hot-melt properties, excellent workability, and curing characteristics such as overmolding, and a cured product obtained therefrom does not become hard or brittle, even if left at a temperature of 150° C. or higher for a long time. The curable silicone composition comprises: an organopolysiloxane resin component which is non-hot-meltable, comprises a siloxane unit represented by SiO4 / 2 making up at least 20 mol % or more of the total siloxane units, and has a mass loss of 2.0 mass % or less when exposed to 200° C. for 1 hour; a liquid straight-chain or branched chain organopolysiloxane; and a curing agent.

The invention discloses a preparation method of a monocyclopentadienyl trialkoxy titanium precursor, and belongs to the technical field of synthesis of metal organic compounds. The method comprises the following steps: S1, reacting a deprotonation product of RnCp, (R0) mSiXz and an accelerant to obtain an intermediate I; s2, reacting the intermediate I with TiX4 to obtain an intermediate II; s3, the intermediate II and R1OM are subjected to a reaction, and a monocyclopentadienyl trialkoxy titanium precursor is prepared; r and R1 are independently selected from C1-C5 straight-chain or branched-chain alkyl groups, Cp is cyclopentadienyl, R0 is C1-C3 alkyl groups, X is halogen and is selected from any one of F, Cl, Br and I, n is an integer of 0-5, m + z is equal to 4 and 1 < = z < = 2, and M is alkali metal. The synthesis route has good safety and economical efficiency, the yield of the industrial synthesis route is remarkably improved, the reaction time is short, the synthesis efficiency is high, and the industrial application value is high.

The invention provides a method for preparing electrolyte-based homo-polyester based on a waste electrolyte, and belongs to the field of polymer synthesis and high-value utilization of resources, a high-boiling-point organic solvent in the waste lithium battery electrolyte and straight-chain dihydric alcohol are subjected to transesterification under the action of a catalyst to be converted into straight-chain carbonate dihydric alcohol ester; then, the straight-chain carbonic acid diol ester is used as a rigid monomer to be copolymerized with bio-based dibasic acid, and a high-performance homopolyester material with high thermal stability, excellent mechanical property and good biodegradability is prepared; the method not only solves the problem of innocent treatment of the waste electrolyte, but also realizes effective reutilization of resources, reduces the production cost of the polyester, and remarkably improves the comprehensive performance of the polyester; in addition, compared with traditional petroleum-based polyester, the novel material provided by the invention has better environmental protection characteristic, reduces dependence on non-renewable resources, and promotes green circulation and sustainable development.

The invention relates to the technical field of aluminum electrolytic capacitor electrolyte processing, in particular to a high-performance aluminum electrolytic capacitor electrolyte and a preparation method thereof. The invention discloses a water-soluble conductive agent, which is prepared from the following raw materials in percentage by weight: 5 to 10 percent of conductive salt, 0.1 to 2 percent of corrosion inhibitor, 3 to 5 percent of butyl-terminated fatty alcohol-polyoxyethylene ether, 2 to 5 percent of polyacrylic acid-polyacrylamide diblock copolymer, 0.5 to 2 percent of additive, 0.5 to 2 percent of straight-chain polycarboxylic acid, 6 to 10 percent of ionic liquid and the balance of solvent, the butyl-terminated fatty alcohol-polyoxyethylene ether has the structural formula of R-O-(CH2CH2O) xCH2CH2OBu, r represents a fatty alcohol group, is C12-18 alkyl, and is a straight chain or a branched chain; n is the addition number of ethylene oxide, and x is equal to 10-50; through the synergistic effect of the components in the formula, a stable and efficient electrolyte system is formed, the performance and reliability of the aluminum electrolytic capacitor in severe environments such as high temperature and low temperature are remarkably improved, the service life of the aluminum electrolytic capacitor is prolonged, and the requirements of modern electronic equipment for high-performance capacitors are met.

The invention provides a vanadium-based metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of metal organic framework materials. The vanadium-based metal organic framework material is of a three-dimensional framework structure formed by connecting a one-dimensional vanadium oxygen chain and a squaric acid ligand through coordinate bonds. The preparation method of the vanadium-based metal organic framework material comprises the following steps: adding a vanadium source and an organic ligand into an acidic aqueous solution for solvothermal reaction to obtain the vanadium-based metal organic framework material, and the organic ligand is squaric acid. The vanadium-based metal organic framework material provided by the invention can be used for separating straight-chain alkane and isomers thereof.