1639 results about "Biphenyl" patented technology

The invention relates to an anion exchange membrane based on isopropyl piperidone and biphenyl and a preparation method of a membrane electrode, the preparation method comprises the following steps: respectively dissolving an aromatic monomer and IPD in a first solvent, and mixing to obtain a mixed solution, the aromatic monomer being BP or TP; dropwise adding an acidic initiator into the mixed solution for reaction at the reaction temperature of-5 DEG C to 0 DEG C to obtain a nitrogen heterocyclic ring polymer intermediate; adding a quaternization reagent into the nitrogen-containing heterocyclic ring polymer intermediate to realize quaternization modification of nitrogen atoms to obtain a quaternization ionomer; and forming a film to obtain the AEM film. The preparation method of the membrane electrode comprises the following steps: respectively forming a cathode catalyst layer and an anode catalyst layer on two opposite sides of an AEM membrane through ultrasonic spraying to obtain the MEA. The AEM membrane and the MEA obtained according to the invention have the characteristics of excellent stability and high water electrolysis performance, can significantly improve the efficiency and durability of AEMWE, and are suitable for the fields of hydrogen production by water electrolysis and the like.

The invention relates to the technical field of preparation of organic photoelectric materials, in particular to an electron transport material, an OLED with the electron transport material and an organic light-emitting device with the electron transport material. According to the electron transport material disclosed by the invention, triazinyl is taken as a framework, phenyl and cyano-substituted biphenyl is taken as a specific substituent group, methyl, adamantyl, phenyl and pyridyl are limited to be matched, and the electron transport material is used as a material for forming an electron transport layer to manufacture an organic electroluminescent device, so that the evaporation process of the device can be smoothly carried out; and the light-emitting efficiency of the organic light-emitting device is effectively improved, and the application prospect is very good.

The invention is applicable to the technical field of intelligent response materials, and provides a three-dimensional azobenzene functionalized covalent organic framework intelligent response material and a preparation method thereof. The three-dimensional azobenzene functionalized covalent organic framework intelligent response material is prepared by uniformly grinding 3, 3 ', 5'-tetra [(3 ', 5'-diformylphenyl)]-hexamethyl biphenyl and azobenzene-4, 4 '-diaminotriphenylamine, adding an organic solvent, adding a catalyst acetic acid aqueous solution, quickly freezing, emptying air, sealing with flame, heating after recovering to room temperature, and obtaining the three-dimensional azobenzene functionalized covalent organic framework intelligent response material. According to the invention, the azobenzene functionalized covalent organic framework material with a bcu topological structure is synthesized; the material has excellent photostimulation response CO2 adsorption performance; reversible control of CO2 adsorption capacity can be realized through ultraviolet light and heating conditions, at least five times of circulation can be maintained, and good circulation stability is achieved.

The invention belongs to the technical field of pharmaceutical preparations, and relates to traditional Chinese medicine self-assembled nanoparticles for enhancing anti-inflammatory activity as well as a preparation method and application of the traditional Chinese medicine self-assembled nanoparticles. The traditional Chinese medicine self-assembled nanoparticles are prepared from biphenyl cyclooctene type lignan and an oleanane type pentacyclic triterpenoid compound, wherein the mass ratio of the biphenyl cyclooctene type lignan to the oleanane type pentacyclic triterpenoid compound is 1 to (0.125 to 8). Through an anti-solvent exchange method, the carrier-free nanoparticles based on self-assembly of the traditional Chinese medicine active ingredients are prepared by utilizing spontaneous non-covalent interaction between the biphenyl cyclooctene lignan and the oleanane pentacyclic triterpenoid, so that the cytotoxicity is remarkably reduced, the biocompatibility is enhanced, and the toxic and side effects are reduced; meanwhile, the traditional Chinese medicine self-assembled nano-particles have a remarkable cellular uptake effect, the absorption and utilization efficiency of the medicine is improved, and more efficient anti-inflammatory biological activity is shown.

The invention discloses a coated reflecting film based on an organic fluorescent coating and a preparation method of the coated reflecting film, tetra (4-aminophenyl) methane and tetra-(4-formyl-(1, 1-biphenyl)) ethylene are used as reaction monomers to prepare a novel topological structure [4 + 4] COF (3D-TPE-COF) with a tetraphenylethylene (TPE) unit, and the novel topological structure [4 + 4] COF (3D-TPE-COF) is used for preparing the reflective film based on the organic fluorescent coating. The covalent organic framework material 3D-TPE-COF is added into coating liquid as a fluorescent material to prepare a coating reflecting film based on an organic fluorescent coating, and the obtained reflecting film can convert high-energy blue light, so that the brightness of light emitted by a backlight module is higher and closer to white; meanwhile, the 3D-TPE-COF fluorescent material and the polymer particles can form hydrogen bonds in the coating liquid to avoid aggregation of the polymer particles, so that the wear resistance and scratch resistance of the coating reflecting film are improved.

The invention relates to the technical field of polyimide films, in particular to a PI film and a preparation method thereof. The PI film comprises the following raw materials in parts by mass: 100-150 parts of soluble polyimide resin, 5-15 parts of biphenyl epoxy resin, 5-10 parts of activated titanium dioxide, 1-5 parts of a curing agent and 1-3 parts of a curing accelerator, the soluble polyimide resin comprises the following raw materials in parts by mass: 5-10 parts of a first monomer, 25-30 parts of a second monomer, 50-60 parts of a third monomer, 20-30 parts of acetic anhydride and 5-15 parts of triethylamine. The size stability and heat resistance of the film can be remarkably improved, meanwhile, the outstanding transparency of the polyimide film can be guaranteed, and the application of the film in the field of flexible display is met.

The invention discloses an anti-fog automobile glass film and a preparation method thereof, and relates to the technical field of glass films. The anti-fog automobile glass film prepared by the invention is prepared from modified polyacrylate, modified silicon dioxide and pyrrole, the modified polyacrylate is obtained by reacting polyacrylate with 4-ethynyl acetophenone, and then reacting with 1H-pyrrole-3-formaldoxime; the modified silicon dioxide is obtained by formylating amino silicon dioxide coated with sodium alginate and then polymerizing the formylated amino silicon dioxide, 4, 4 '-diformyl-2, 2'-disulfonic acid biphenyl and pyrrole-3-formaldehyde. The anti-fog automobile glass film prepared by the invention has good antibacterial, anti-aging and photocatalytic properties.

The invention provides a sodium ion battery as well as a preparation method and application thereof, and belongs to the technical field of battery materials. The sodium ion battery comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode is a sodium-supplemented positive plate treated by a biphenyl sodium complex solution; the electrolyte comprises a NaPF6 basic electrolyte and an additive; and the additive is selected from at least one of 3-trimethylsilyl-2-oxazolidinone and N, N-dimethyl formamide. The resistance and capacity of the positive electrode are improved by supplementing sodium to the positive electrode, and the charge-discharge cycle life of the battery is prolonged by adding a polar reagent into the electrolyte to capture PF5 and remove trace water and harmful gas HF generated in charge and discharge.

The invention relates to application of a benzofuran terphenyl compound in medicines, belongs to the field of medicinal chemistry, and particularly relates to a terphenyl compound which comprises a stereoisomer, a geometric isomer, a tautomer, nitrogen oxide, hydrate, solvate, metabolite and ester of the terphenyl compound. The pharmaceutically acceptable salt or the prodrug thereof and the pharmaceutical composition containing the compound are used as medicines, especially used for treating and / or preventing related diseases caused by HIF.

To provide a resin composition capable of improving flowability of the resin composition and crack resistance of a cured product thereof.SOLUTION: A resin composition contains an epoxy compound (A), a liquid aromatic amine compound (B), and an inorganic filler (C). The epoxy compound (A) contains a liquid epoxy compound (A1) and a solid epoxy compound (A2). The solid epoxy compound (A2) contains a solid epoxy resin (a) which is at least one kind selected from a group consisting of an isocyanate modified epoxy resin, a naphthalene type epoxy resin, and a biphenyl type epoxy resin. The viscosity of the resin composition at 25°C is 400 Pa s or less.SELECTED DRAWING: Figure 1

The invention discloses a phenanthridine-6-formaldehyde derivative and a preparation method and application thereof.The preparation method comprises the steps that 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile serves as a photocatalyst, 1-azabicyclo [2.2. 2] octane serves as a hydrogen atom transfer catalyst, a biphenyl isocyanide compound, the photocatalyst, the hydrogen atom transfer catalyst and an alkali additive are jointly dissolved in 1, 3-dioxolane, the mixture is stirred to be uniform, and the phenanthridine-6-formaldehyde derivative is obtained. And carrying out free radical tandem cyclization and acid-catalyzed hydrolysis reaction to obtain the phenanthridine-6-formaldehyde derivative. The invention also provides a specific reaction equation. According to the developed synthesis method of the phenanthridine-6-formaldehyde derivative, the compound can be efficiently and conveniently prepared, the technical bottlenecks of harsh reaction conditions and tedious steps in a traditional process are successfully overcome, raw materials which are low in price and easy to obtain are adopted, operation is carried out under mild conditions, the synthesis method has the outstanding advantages of being high in yield, safe and simple to operate, environmentally friendly and the like, and the method is suitable for industrial production. Good industrial application potential is shown.

The present invention relates to a fluxapyroxad intermediate trifluoronitrobiphenyl synthesis method, and belongs to the technical field of organic synthesis, the method comprises the following steps: Step 1: under nitrogen protection, adding 3, 4, 5-bromotrifluorobenzene, o-nitrophenylboronic acid, a catalyst, a promoter, an alkali and a solvent into a reaction flask, and after addition, carrying out a heat preservation reaction; and Step 2: after the reaction is finished, carrying out phase splitting and organic phase concentration to obtain the 3 ', 4', 5 '-trifluoro-2-nitrobiphenyl. Compared with a traditional synthetic method of the trifluoro-nitrobiphenyl, the synthetic method of the trifluoro-nitrobiphenyl has the advantages that the 3, 4, 5-trifluoro-bromobenzene and the o-nitrophenylboronic acid are directly used as raw materials, the production step of preparing the 3, 4, 5-trifluoro-phenylboronic acid from the 3, 4, 5-trifluoro-bromobenzene through a multi-step reaction is avoided, the yield can be effectively improved, the utilization rate of the raw materials is high, and the method is suitable for industrial production. And the o-nitrophenylboronic acid preparation method is simple, the reaction cost can be effectively reduced, the reaction route is shorter, simpler and more efficient, the reaction conditions are mild, and the method has higher industrial application value.

The invention relates to a compound containing a thiophene group, a device and equipment. In the structural formula of the compound, R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are independently selected from hydrogen, halogen, cyano, trifluoromethyl, triphenylamine and derivatives thereof, methoxyl, aryl and derivatives thereof, cyanobiphenyl and naphthyl; the compound can be used for preparing a photovoltaic device and photovoltaic equipment and is used for improving the efficiency and stability of the photovoltaic device.

The invention discloses modified ink for improving the reflectivity of a substrate of a multi-primary-color LED illuminating lamp and a preparation method of the modified ink, and belongs to the technical field of ink. The modified ink is prepared from the following raw materials: 18 to 26 parts of reflective powder, 35 to 60 parts of organosilicone modified acrylic resin, 10 to 16 parts of biphenyl liquid crystal epoxy resin, 5 to 8 parts of a photoinitiator, 3 to 6 parts of a curing agent, 1.5 to 5 parts of an antioxidant, 0.5 to 1 part of a flatting agent and 30 to 40 parts of a solvent. The composite coated core-shell titanium dioxide is adopted as reflective powder and is matched with the organic silicon modified acrylic resin and the biphenyl liquid crystal epoxy resin to prepare the modified ink, the reflectivity can reach 96% or above under the thickness of 30 microns, the yellowing resistance is excellent, the luminous efficiency utilization rate can be increased, energy consumption is reduced, and the service life of the ink is prolonged. The method can be used for preparing high-quality LED lamps with high brightness and high stability.

A pyrazine thio-biphenyl compound and its application, specifically discloses the compound of formula (II) or a pharmaceutically acceptable salt thereof.

The invention relates to the technical field of negative-electrode-free solid-state batteries, and particularly discloses a construction method of a negative-electrode-free solid-state sodium battery interface, which specifically comprises the following steps: dropwise adding a biphenyl sodium solution to a three-dimensional porous skeleton constructed by a solid-state electrolyte to obtain a stable quasi-liquid-state interface layer. The solid electrolyte with the interface layer is applied to the negative-electrode-free solid sodium battery, and the interface layer is applied to a negative electrode side, so that the stability of a negative electrode interface of the negative-electrode-free solid sodium battery can be effectively improved, the nuclear potential of sodium can be effectively reduced, the electric field distribution can be adjusted, dendritic crystal generation can be inhibited, uniform sodium deposition can be promoted, and the cycling stability of the battery can be improved.

The invention relates to the technical field of coatings, in particular to a low-temperature curing type fluorocarbon coating for an aluminum alloy and a preparation method of the low-temperature curing type fluorocarbon coating. The preparation method comprises the following steps: adding eugenol, potassium carbonate and decafluorobiphenyl to obtain modified biphenyl; and adding m-chloroperoxybenzoic acid to prepare the reinforcing agent. And performing surface modification on the linear silicon dioxide filler, the flaky silicon dioxide filler and the dendritic silicon dioxide filler by using gamma-epoxypropoxy propyl trimethoxy silane to obtain the epoxy modified wear-resistant filler. The preparation method comprises the following steps: adding epoxy resin and the epoxy modified wear-resistant filler into xylene, ultrasonically stirring, adding fluorocarbon resin, a reinforcing agent and a curing agent, and continuously ultrasonically stirring to obtain the fluorocarbon coating. The fluorocarbon coating prepared by the invention has good adhesion performance, wear resistance and mechanical strength, so that the fluorocarbon coating has a wide application prospect in the technical field of coatings.

The invention provides a preparation method of a block poly (biphenyl-trifluoroacetophenone-piperidone) bicontinuous hollow fiber loose nanofiltration membrane, which comprises the following steps: adding acid into biphenyl and N-methyl-4-piperidone to react to obtain a first product; adding acid into biphenyl and 2, 2, 2-trifluoroacetophenone to react, so as to obtain a second product; adding the second product into the first product, and carrying out condensation polymerization to obtain a PBTbBP block polymer; dissolving the PBTbBP block polymer in a solvent, and defoaming to obtain a membrane casting solution; spinning the membrane casting solution and the core solution to obtain membrane filaments; and immersing the membrane filaments in a coagulating bath, and carrying out phase separation. According to the preparation method, biphenyl, a hydrophobic trifluoroacetophenone monomer and a hydrophilic N-methyl piperidone monomer are subjected to superacid catalysis Friedel-Crafts reaction and are subjected to step-by-step copolymerization to obtain the amphiphilic block polymer PBTbBP. The membrane has efficient mass transfer channels and excellent membrane surface hydrophilicity, and the separation capacity of dye molecules and salt ions and the water permeability are improved.

The invention discloses a preparation method and application of a controllable depolymerization and debonding high-performance epoxy adhesive. The preparation method comprises the following steps: S1, reacting an aldehyde monomer with an alcohol monomer to obtain a polyhydroxy intermediate containing an acetal structure; the aldehyde monomer has at least one hydroxyl functional group; the alcohol monomer has more than three hydroxyl functional groups; s2, carrying out ring-opening addition and alkaline environment ring-closing epoxidation reaction on epoxy chloropropane and the polyhydroxy intermediate to obtain an epoxy monomer containing an acetal dynamic bond; and S3, compounding the epoxy monomer obtained in the step S2 with a temperature-resistant epoxy monomer, and mixing and curing with an amine curing agent to obtain the controllable depolymerization debonding thermosetting adhesive under the acidic condition, the temperature-resistant epoxy monomer comprises at least one of an epoxy monomer containing a naphthalene ring structure and an epoxy monomer containing a biphenyl structure.

The invention relates to the technical field of oilfield exploitation, and discloses a polysaccharide-containing solid-free drilling fluid and a preparation method and application thereof.The drilling fluid is formed by mixing a plugging anti-collapse agent, a polysaccharide fluid loss agent, a tackifier and the like as raw materials, the functional monomer is prepared by carrying out emulsion cross-linking polymerization under the action of an initiator, the functional monomer structure contains a large number of quaternary ammonium cations and sulfonic acid groups and also contains a biphenyl structure, and the quaternary ammonium cations can generate a strong adsorption effect with shale and silt, so that the plugging effect and temperature resistance of the drilling fluid are improved; polysaccharide is adopted as the filtrate reducer of the drilling fluid, high-viscosity colloid can be formed after the polysaccharide is dissolved in water, stratum pores are effectively blocked, filtrate invasion is reduced, the filter loss is reduced, and the polysaccharide filtrate reducer can improve the viscosity of the drilling fluid, enhance the rock-carrying capacity of the drilling fluid and improve the cleaning effect of a well hole.

The invention relates to the technical field of flame-retardant PC, in particular to a flame-retardant insulating PC thin film material for a battery and a preparation method of the flame-retardant insulating PC thin film material. The preparation method comprises the following steps: mechanically mixing a phosphaphenanthrene modified silicon dioxide filler, a phosphamide modified silicon dioxide filler and a biphenyl modified silicon dioxide filler to obtain a flame-retardant silicon dioxide filler; and fully mixing the polycarbonate resin, the flame-retardant silicon dioxide filler, the carbon black, the anti-dripping agent, the antioxidant and the dispersing agent, and carrying out melt blending, extrusion granulation and extrusion film forming to obtain the PC film material. The PC thin film material prepared by the invention has good flame retardance and corrosion resistance, so that the PC thin film material has a wide application prospect in the technical field of flame-retardant PC.

The invention discloses a binder and a preparation method thereof, a negative pole piece, a lithium ion battery, a battery pack and an electric device. The binder comprises a first structural unit as shown in a formula (1), a second structural unit as shown in a formula (2) and a third structural unit as shown in a formula (3), when R2 is a hydrogen atom, R1 is selected from a hydrogen atom, methyl or ethyl, and when R2 is a # imgabs 1 #, R1 is a hydrogen atom; # imgabs2 is represented by formula (3), Ar is one or more of phenyl, biphenyl and naphthyl, and y is 20-1000. Therefore, the binding performance of the binding agent is improved, the binding strength between a negative active material layer and a current collector is improved when the binding agent is applied to the negative pole piece, the flexibility of the negative pole piece is improved, the negative pole piece is not prone to cracking or powder falling in the cyclic charging and discharging process, and therefore the cycle performance of the negative pole piece is improved.

The invention discloses an imidazole derivative molecule modified solar cell and a preparation method thereof, and belongs to the technical field of solar cells. The cell sequentially comprises an ITO (Indium Tin Oxide) conductive glass layer, a nickel oxide passivation layer, a [4-(3, 6-dimethoxy-9H-carbazole-9-yl) butyl] phosphonic acid hole transport layer, an ITO (Indium Tin Oxide) conductive glass layer and a nickel oxide passivation layer from bottom to top, the thin film solar cell is characterized in that the thin film solar cell comprises a substrate, a metal Ag electrode layer, a Cs0.05 (FA0. 95MA0. 05) 0. 95Pb (I0. 95Br0. 05) 3 narrow-band gap perovskite thin film PVSK modified by 2-(2 ', 6'-dichloroanilino)-2-imidazoline, a (6, 6)-phenyl-C61-butyric acid methyl ester electron transport layer, a 2, 9-dimethyl-4, 7-biphenyl-1, 10-phenanthroline hole blocking layer and a metal Ag electrode layer; according to the scheme, perovskite defects are passivated through imidazole derivative molecules, double-interface passivation and crystallization regulation are achieved, the film quality is improved, and the crystal quality of the perovskite film is remarkably improved; due to effective passivation of the double interfaces, ion migration is obviously inhibited, the carrier transmission efficiency is effectively improved, and the moisture resistance of the perovskite thin film and the device stability are improved.

The invention discloses a high-sensitivity ratio-type fluorescent probe for detecting hypochlorous acid as well as a preparation method and application of the high-sensitivity ratio-type fluorescent probe. The N '-(4'-(6, 6-dimethyl-4, 5, 6, 7-tetrahydro-1H-5, 7-bridge methylene indazole-3-yl)-[1, 1 '-biphenyl]-4-methylene) malononitrile prepared by using a natural renewable forest resource beta-pinene derivative nopinone as a raw material can selectively react with hypochlorous acid, and the fluorescent color of the N'-(4 '-(6, 6-dimethyl-4, 5, 6, 7-tetrahydro-1H-5, 7-bridge methylene indazole-3-yl)-[1, 1'-biphenyl]-4-methylene) malononitrile is changed from yellow to cyan, so that the effect of the N '-(4'-(6, 6-dimethyl-4, 5, 6, 7 the maximum fluorescence emission wavelength is changed from 460 nm to 375 nm, and the compound can be used as a specific ratio type fluorescent probe for detecting hypochlorous acid and has a good application prospect.

The invention discloses a wood-plastic composite material for a laboratory fume hood and a preparation method thereof, and relates to the technical field of composite materials, and the wood-plastic composite material is prepared from the following raw materials in parts by weight: 30-40 parts of plant fiber powder, 40-50 parts of functional polycondensate, 20-30 parts of PBT resin, 10-20 parts of aromatic hyperbranched polyester, 1-2 parts of a coupling agent, 0.3-0.8 part of an antioxidant, 0.8-1.5 parts of a lubricant, and 1-2 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. 1-2 parts of 2, 7-anthraquinone disulfonic acid and 1-3 parts of a catalyst A; the functional polycondensate comprises structural units introduced by the following monomers: 4, 6-hydroxy-2-cyanobenzothiazole, 2, 2-bis [4-(4-aminophenoxy) phenyl]-1, 1, 1, 3, 3, 3-hexafluoropropane and dimethyl biphenyl diisocyanate. The composite material is high in mechanical strength, sufficient in toughness and excellent in flame retardance and aging resistance.

The invention relates to the technical field of catalysis, in particular to a green preparation process for synthesizing 4 '-chloro-2-aminobiphenyl through a membrane method.A palladium-based catalytic membrane is prepared through an impregnation method, by means of the multi-pore-channel advantage of a ceramic membrane, active components can be well distributed on the surface and in the membrane, contact of a reaction substrate and active sites is promoted, and the catalytic activity of 4'-chloro-2-aminobiphenyl is improved. The reaction effect is enhanced, the reaction efficiency is improved, the preparation process is simple, the preparation environment is mild, and large-scale production can be realized; meanwhile, the 4 '-chloro-2-aminobiphenyl is prepared by adopting a method for carrying out Suzuki-Miyaura coupling reaction by adopting the catalytic membrane, tedious steps in the traditional industry are omitted, compared with a traditional heterogeneous catalyst, the trouble of recovery is avoided, the cost is saved, the harm to the environment is greatly reduced, and compared with the prior art, the 4'-chloro-2-aminobiphenyl has a wide application prospect.

The invention discloses a novel automobile back view mirror flexible printed circuit board prepared based on weldable silver paste, and belongs to the technical field of electronic materials and devices, conductor patterns in the flexible printed circuit board comprise a main circuit pattern and an auxiliary function structure formed by weldable low-temperature curing silver paste; the curing temperature of the weldable low-temperature silver paste is 125-135 DEG C, and the weldable low-temperature silver paste comprises conductive filler, a polymer resin system, a high-boiling-point ester solvent, a curing agent, a silane coupling agent, a polyamide wax thixotropic agent, a polysiloxane defoaming agent, modified carbon nanotubes, modified aluminum oxide powder, modified barium sulfate and a low-stress modifier. The polymer resin system comprises novolac epoxy resin, biphenyl epoxy resin and a polyacrylate-CTBN copolymer; through the synergistic effect of all the components and an innovative process, comprehensive improvement of mechanical reliability, environmental durability, conductive stability and power load capacity is achieved, and the strict requirement for high reliability of the automobile rearview mirror in an extreme environment is perfectly met.

The invention discloses a supramolecular polyurethane prepolymer, supramolecular polyurethane prepolymer ink, a supramolecular polyurethane elastomer as well as a preparation method and application of the supramolecular polyurethane prepolymer. The structural formula of the supramolecular polyurethane prepolymer is as follows: # imgabs0 #; wherein m is 5-35, n is 6-28, and R is 2-acetyl benzene, phenyl or biphenyl. The supramolecular polyurethane prepolymer has multiple strong hydrogen bonds formed by allophanate bonds and carbamate bonds, microphase separation of soft and hard segments of polyurethane is promoted, the tightness of chain segment spatial conformation is increased by utilizing a planar structure of boron atoms, hydrogen bonds between the carbamate bonds are enhanced, and the microphase separation of soft and hard segments of polyurethane is promoted. The tensile strength, the thermal stability and the toughness of a 3D printed product are improved by virtue of multi-reinforcement coupling due to the dynamic characteristics of the boric acid ester bond, and the 3D printed product has excellent bearing capacity.

A biphenyl derivative, its preparation method and its use in preparing drugs for treating related diseases, specifically relating to a compound represented by formula (I) and a pharmaceutically acceptable salt thereof.