33 results about "Poly(benzimidazole)" patented technology

This invention discloses a low-functionality photocurable resin and its preparation method, comprising: dissolving polybenzimidazole in a polar aprotic solvent in an inert gas atmosphere to obtain a polybenzimidazole solution; adding sodium hydride in a molar amount equal to 0.8–1.2 times the molar amount of the polybenzimidazole resin to the polybenzimidazole solution, reacting the mixture, then adding allyl bromide in a molar amount equal to 0.8–1.2 times the molar amount of the polybenzimidazole resin, reacting again to obtain a polybenzimidazole prepolymer; dissolving the polybenzimidazole prepolymer in a polar aprotic solvent, adding a crosslinking agent and a photoinitiator, and mixing to obtain a photocurable resin solution; irradiating the photocurable resin solution with ultraviolet light, and drying to obtain a photocurable resin with a functionality of 20%–44%. This invention features a low allyl content, allowing for the curing of aromatic resins with less crosslinking agent, and the cured resin exhibits excellent heat resistance and ultra-high mechanical strength.

The present invention provides an ion exchange membrane that has excellent electrolyte resistance and battery characteristics, and facilitates the manufacture of electrochemical cells. [Solution] An ion exchange membrane comprising a polybenzimidazole or a derivative thereof represented by formula (1), wherein the ion exchange membrane comprises a dense layer and a porous layer, the dense layer is provided at either end of the porous layer, and the thickness of the dense layer is 0.1 to 10 μm. JPEG2026104048000009.jpg46146 (In general formula (1), R 1 R is a tetravalent aromatic unit that can form an imidazole ring. 2 (where X represents a divalent aromatic group, and Y represents a group containing an anionic functional group, and Y represents a group containing a hydrogen atom or a cationic functional group.)

This invention relates to a high-temperature resistant industrial coating and its preparation method. The method includes: amylating Fe3O4 nanoparticles; grafting the amylated Fe3O4 nanoparticles with polybenzimidazole to obtain PBI-g-Fe3O4 composite particles; in-situ growing MOF to form polyMOF; and surface modification with a hydrophilic silane coupling agent to obtain a hydrophilic modified polyMOF; simultaneously, co-grafting silica nanoparticles with an aminosilane coupling agent and a long-chain alkylsilane coupling agent to obtain a synergist; finally, dispersing all components in an aqueous polyester resin varnish to prepare a composite coating. This invention achieves stable dispersion and strong interfacial bonding of polyMOF in aqueous polyester through a multi-level chemical bonding structure. The synergist synergistically provides curing and defoaming effects. The resulting coating exhibits grade 0 adhesion, excellent defoaming performance, a pencil hardness of 3H, and a temperature resistance limit of 640℃, showing broad application prospects in the field of high-temperature protection.

This invention proposes a polybenzimidazole microporous ion-conducting membrane and its one-step electrospray preparation method. Polybenzimidazole electrospray solutions are prepared using organic solvents with different boiling points. Electrospray parameters are adjusted under a high-voltage electrostatic field, and the polybenzimidazole electrospray solution is dispersed into nanodroplets using this field. A receiving roller rotates to spread and layer the droplets, followed by rapid drying and solidification, directly preparing the polybenzimidazole microporous membrane. This invention can directly prepare microporous membranes using non-ionic polymer materials, and the membrane preparation process is simple and easily scaled up. It overcomes the problem of high mass transfer resistance of non-ionic polymers, enabling highly selective proton conduction. Simultaneously, the high stability of non-ionic polymers improves the oxidative stability and mechanical strength of the ion-conducting membrane, showing broad application prospects in the field of new energy storage flow batteries.

The application discloses a kind of TGIC crosslinking regulation amino-silica distribution composite high-temperature proton exchange membrane and preparation method thereof, the composite high-temperature proton exchange membrane includes polybenzimidazole (OPBI), polyvinylpyrrolidone (PVP), amino-silica (NH2-SiO2), isocyanuric acid triglycidyl ester (TGIC). By TGIC crosslinking, NH2-SiO2 is uniformly anchored in OPBI polymer network, effectively prevent its agglomeration.PVP as a compatibilizer, improve organic / inorganic interface.The composite high-temperature proton exchange membrane has high mechanical strength, excellent phosphoric acid retention capacity, high proton conductivity and low swelling property.The preparation method of the application includes the preparation of amino-silica, solution blending, casting film and crosslinking and the like steps, simple process, suitable for large-scale production.The prepared composite high-temperature proton exchange membrane is suitable for high-temperature proton exchange membrane fuel cell, can significantly improve cell performance and life.

The present application relates to the technical field of polymer preparation, and provides a polybenzimidazole and a preparation method and application thereof.The present application forms a mixed solvent system by compounding PPA and MSA, improves the viscosity problem of a traditional single solvent system by the synergistic effect of a phosphorus pentoxide cosolvent, improves the solubility and mass transfer efficiency of the reaction system to diamine and diacid monomers, and lays a foundation for the full performance of polycondensation reaction; the mixed solvent system formed by compounding PPA and MSA not only solves the inherent defects of the pure PPA system, such as high viscosity, high reaction temperature and limited monomer diffusion, but also makes up for the short board of the pure MSA system, such as insufficient catalytic activity, realizes the synergistic balance of catalytic activity and mass transfer efficiency, completes the polycondensation under relatively low temperature conditions, significantly reduces the process energy consumption, greatly improves the product molecular weight and batch consistency, and the obtained polybenzimidazole can be used in the fields of proton exchange membranes, diaphragms and the like.

This invention relates to the field of polymer materials technology, specifically to a high-temperature and humid heat-resistant water-based ink, its preparation method, and its application. The steps are as follows: S1, polybenzimidazole (PBI) powder is cryogenically ground to obtain nano-sized PBI powder; S2, deionized water, emulsifier, coupling agent, initiator, and defoamer are mixed and dispersed with the nano-sized PBI powder to prepare a PBI pre-dispersion; S3, deionized water, emulsifier, at least one of acrylic monomers and acrylate monomers, a functional amine, and a pH buffer are mixed to prepare a seed emulsion; S4, the PBI pre-dispersion is added dropwise to the seed emulsion, and in-situ polymerization is carried out in an emulsion polymerization apparatus to obtain a PBI-functional amine hybrid emulsion; S5, the PBI-functional amine hybrid emulsion is mixed and dispersed evenly with a defoamer, leveling agent, anti-abrasion agent, and water-based colorant to obtain a high-temperature and humid heat-resistant water-based ink. This invention improves the water resistance, heat resistance, and adhesion performance of the ink film under conditions of boiling, high-temperature sterilization, and high-temperature and humid heat.

The application relates to the technical field of lithium ion batteries, in particular to a high-temperature-resistant polybenzimidazole diaphragm with an imidazole group-rich semi-interpenetrating structure, a preparation method of the diaphragm and a lithium ion battery. The diaphragm is rich in imidazole groups, acyloxy groups or amide groups, has strong affinity to electrolyte, and has good electrolyte wettability and liquid retention; the above groups can promote lithium salt dissociation, and the lithium ion Li + coordinating; the semi-interpenetrating network structure has a large number of uniformly distributed mesopores, improves porosity, expands lithium ion Li + transport channels; the polybenzimidazole OPBI and polyvinylimidazole PVIm have good heat resistance, and the crosslinked structure further enhances the heat resistance and mechanical strength of the diaphragm. The diaphragm has regular finger-shaped pores and sponge-shaped pores, has high conductivity, good electrochemical stability, and can effectively inhibit the disorderly growth of lithium dendrites. The battery assembled by the diaphragm has excellent safety, discharge specific capacity, cycle stability (at normal temperature and high temperature), rate performance, and low electrode polarization.

The application relates to the technical field of high polymer material modification, in particular to a modified polybenzimidazole alloy and a preparation method thereof, which comprises the following materials in parts by weight: 15-40 parts of polybenzimidazole, 50-70 parts of low-melting-point polyaryletherketone, 0.1-8 parts of a compatilizer, 0-1.5 parts of an antioxidant, and 0-0.8 parts of a lubricant; the polybenzimidazole, the low-melting-point polyaryletherketone and the compatilizer are melt-blended, extruded and granulated respectively, then the remaining materials are mixed, melt-blended, extruded and granulated again to obtain the modified alloy; the low-melting-point polyaryletherketone with good processing fluidity is mixed in the polybenzimidazole to solve the problem that the polybenzimidazole is difficult to be hot-plastic processed and formed, and the obtained modified alloy has good mechanical properties and thermal stability.

The application relates to the technical field of all-vanadium redox flow batteries, in particular to a high-oxidation-resistance polybenzimidazole proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane is prepared by mixing different high-oxidation-resistance polymer monomers in a reaction process to prepare polybenzimidazole block copolymers, and the membrane formed by the copolymers can realize rapid and selective proton conduction after being soaked in a high-concentration acid solution. In the application process of poly(2,2'-(p-oxydiphenyl)-5,5'-benzimidazole) in an all-vanadium redox flow battery, the polymer skeleton is easily oxidized by VO2 + , thereby causing the problems of battery capacity attenuation and continuous reduction of energy conversion efficiency, the application can effectively improve the microphase separation structure of the polybenzimidazole block copolymer membrane by synthesizing a high-oxidation-resistance polybenzimidazole block copolymer main chain, construct a rapid ion channel in the polybenzimidazole block copolymer membrane, and improve the utilization rate of an acid solution.

The application belongs to the technical field of electrochemical energy storage, and relates to a high-acid-retention polybenzimidazole composite proton exchange membrane for a flow battery and a preparation method thereof. The composite membrane takes polybenzimidazole as a matrix, and sulfonated nanofillers and quaternized nanofillers are uniformly dispersed in the matrix; and the high-acid-retention polybenzimidazole composite proton exchange membrane is obtained through acid doping and activation treatment. The composite membrane realizes the dual functions of high proton conduction sites and high acid retention, and the two functions cooperatively construct a nanostructure for efficient proton transmission and acid locking in the membrane, thereby improving the efficiency and cycle life of the flow battery. The application has simple process, is easy to industrialize, and has mild and controllable process conditions, and provides a feasible solution for solving the problem of acid loss of the PBI membrane.

The application discloses a composite battery diaphragm, a preparation method thereof and a battery. The composite battery diaphragm comprises a diaphragm body and a filling material. The diaphragm body comprises polybenzimidazole. The filling material is combined on the diaphragm body, and the filling material comprises aromatic polyamide. The diaphragm body comprising polybenzimidazole can improve the thermal stability of the composite battery diaphragm. The aromatic polyamide as the filling material can improve the puncture resistance of the composite battery diaphragm and effectively resist lithium dendrites. The two are synergistic, so that the safety performance of the composite battery diaphragm is improved, and the safety performance of the battery is improved.

The application discloses a composite anion exchange membrane for hydrogen production of an AEM electrolytic cell and a preparation method thereof, and relates to the technical field of water electrolysis hydrogen production membrane materials of hydrogen energy. The composite anion exchange membrane is prepared by superacid catalytic polymerization to prepare a polytriphenyl polymer without ether bond skeleton, the ratio of triphenyl and m-triphenyl is regulated to form an ionomer containing ultramicro-pores, a piperidine ring ion conduction group away from the polymer main chain is matched, and polybenzimidazole (PBI) is blended to form a homogeneous membrane. The application solves the technical problems of the existing anion exchange membrane (AEM), such as the contradiction between ion conductivity and dimensional stability, the lack of chemical stability, the lack of mechanical strength and the like, has the technical effects of high ion conduction efficiency, good dimensional stability, long alkali-resistant service life, excellent mechanical strength and the like, and can meet the long service life use demand of the AEM electrolytic cell for hydrogen production under pressure.

This invention belongs to the field of polymer electrolyte membranes, specifically relating to a cross-linked hydrophilic-hydrophobic dual-comb sulfonated polybenzimidazole proton exchange membrane for water electrolysis and its preparation method. First, polybenzimidazole OPBI containing ether bonds is synthesized. Then, OPBI is reacted with bromoalkane and 1,3-propanesulfonate lactone to synthesize hydrophilic-hydrophobic dual-comb sulfonated polybenzimidazole OPBI-PS-C. Next, a small-molecule cross-linking agent sBI for sulfonated benzimidazole is designed and prepared. Finally, sBI is reacted with OPBI-PS-C to obtain the cross-linked hydrophilic-hydrophobic dual-comb sulfonated polybenzimidazole proton exchange membrane. The introduction of long alkyl side chains can form a microphase separation structure within the membrane, constructing continuous ion transport channels, thereby reducing ion migration impedance and increasing proton conductivity. The introduction of the cross-linked structure improves the membrane's oxidative stability, suppresses swelling under high humidity conditions, and improves the durability of the electrolyzed water.

The present invention relates to a method for manufacturing a nanofiltration membrane, in which cellulose is used as a support to manufacture a polybenzimidazole filtration, thus improving flexibility such that organic solvent permeability and a nanomaterial rejection rate are maintained constant before and after bending.

The application relates to the technical field of high polymer materials, in particular to a high-temperature and high-humidity resistant water-based ink and a preparation method and application thereof. Steps: S1, polybenzimidazole (PBI) powder is frozen and ground to prepare nanoscale PBI powder; S2, deionized water, an emulsifier, a coupling agent, an initiator, a defoaming agent and the nanoscale PBI powder are mixed and dispersed to prepare a PBI pre-dispersed solution; S3, deionized water, an emulsifier, at least one of an acrylic monomer and an acrylic ester monomer, a functional amine and a pH buffer are mixed to prepare a seed emulsion; S4, the PBI pre-dispersed solution is added dropwise into the seed emulsion, and in-situ polymerization reaction is carried out in an emulsion polymerization device to prepare a PBI-functional amine hybrid emulsion; and S5, the PBI-functional amine hybrid emulsion is mixed and uniformly dispersed with a defoaming agent, a leveling agent, an anti-wear agent and a water-based color paste to prepare the high-temperature and high-humidity resistant water-based ink. The ink film has improved water resistance, heat resistance and adhesion in the conditions of cooking, high-temperature sterilization and high-temperature and high-humidity environment.

This invention relates to the field of thermochromic materials, and discloses the application of polybenzimidazole in thermochromic materials. This invention provides a material with thermochromic properties—polybenzimidazole—thus broadening the application fields of polybenzimidazole materials. The thermochromic material provided by this invention has good heat resistance and can be widely used in high-temperature environments.

The present disclosure provides a polybenzimidazole (PBI) gel film exhibiting both high proton conductivity and high tensile strength at fracture. The polybenzimidazole (PBI) gel film of the present disclosure is manufactured using a polybenzimidazole-forming monomer containing high proportions of tetraaminobiphenyl monomer and naphthalenedicarboxylic acid monomer.

The present invention relates to a crosslinkable polybenzimidazole composition, a method for manufacturing a membrane using the same, and uses thereof. More specifically, the invention relates to a crosslinkable polybenzimidazole composition characterized by comprising: a polybenzimidazole in which a protecting group is introduced to an amine group of 25 to 100 mol% of repeating units of the main chain; and a crosslinking agent comprising two or more halogen groups in its molecular structure, and to a crosslinkable polymer electrolyte membrane that can be used in a fuel cell or a redox flow battery for the purpose of a crosslinked polybenzimidazole membrane manufactured using the same.

A method for preparing an antioxidant-enhanced cross-linked polybenzimidazole electrolyte membrane material, specifically involving a method for preparing a cross-linked membrane. The method involves dissolving 3,3'-diaminobenzidine and 4,4'-diphenyl ether dicarboxylic acid in PPA to prepare OPBI; then adding different amounts of 4,4'-dichlorodiphenyl disulfide for cross-linking; the cross-linked membrane is then immersed in a PA solution to obtain the final product. The membrane prepared in this invention achieves proton transfer, thereby exhibiting excellent proton conductivity and improving membrane stability. The covalent bond interaction between 4,4'-dichlorodiphenyl disulfide and the OPBI framework increases the mechanical properties of the membrane. The cross-linked membrane of this invention exhibits high mechanical properties, thermal stability, proton conductivity, and antioxidant properties under high-temperature anhydrous conditions. This invention has applications in high-temperature fuel cells.

This invention proposes a method for preparing an ultra-high strength photocurable resin based on an interpenetrating network structure. The specific steps are as follows: polybenzimidazole and polybenzimidazole prepolymer are mixed, wherein the mass ratio of polybenzimidazole to the total mass of polybenzimidazole and polybenzimidazole prepolymer is 30% to 70%. A polar aprotic solvent is added, and the mixture is stirred to form a mixed solution. A crosslinking agent and a photoinitiator are added to the above solution, and the mixture is stirred and centrifuged to obtain a photocurable resin stock solution. The photocurable resin stock solution is then irradiated with ultraviolet light to obtain a gel elastomer. The gel elastomer is baked to remove the solvent and then a photocurable resin with excellent mechanical properties is obtained.

This invention relates to the field of polybenzimidazole and discloses a method for the continuous production of polybenzimidazole using solution polymerization. The method includes the following steps: (1) under solution polymerization conditions, an aromatic component containing at least four amino groups and an aromatic or aliphatic component containing at least two carboxyl groups are polymerized in a reactor to obtain a viscous reaction solution; (2) the viscous reaction solution is discharged from the reactor, and then the reactor is rinsed using a rinsing medium, wherein the rinsing medium is a polar solvent; steps (1) and (2) are repeated in this manner, alternating between the polymerization and rinsing processes. The method of this invention can avoid pipeline blockage problems, improve yield, increase polymer solubility, and improve the uniformity of product quality across batches.

This invention discloses a hybrid hydrogen separation membrane with a titanium foam framework and an organic polymer filling, along with its preparation method and applications. It relates to the field of hydrogen separation membrane preparation technology and specifically includes the following steps: S1: pretreatment of the titanium foam material; S2: preparation of a homogeneous polybenzimidazole solution as the filling material; S3: preparation of titanium foam internally filled with polybenzimidazole; S4: preparation of a titanium foam hybrid membrane internally filled with polybenzimidazole and phosphoric acid crosslinked; S5: loading Pt particle catalysts onto both sides of the titanium foam hybrid membrane internally filled with polybenzimidazole and phosphoric acid crosslinked by ion sputtering. The titanium foam-organic polymer hybrid membrane of this invention exhibits high hydrogen selectivity, significantly improving the hydrogen permeation flux.

The application provides a method for continuously preparing polybenzimidazole by using a tubular reactor and belongs to the technical field of polymerization. The method comprises the following steps: continuously inputting a prepolymer prepared by subjecting diphenyltetramine to a melt reaction with diphenyl isophthalate into a tubular reactor, and performing a high-temperature polymerization reaction under a protective atmosphere to obtain a polybenzimidazole polymer. Compared with a traditional kettle process, the method significantly improves the reaction efficiency and product quality, has the advantages of safety, environmental protection and low cost, and has a good industrial application prospect.

The application relates to the technical field of polybenzimidazole, and discloses a polybenzimidazole copolymer, a novel proton exchange membrane and a preparation method and application thereof; the proton exchange membrane comprises a matrix and a proton active component; the matrix is a polybenzimidazole homopolymer; the proton active component is a polybenzimidazole copolymer; and the polybenzimidazole copolymer comprises a first structural unit and a second structural unit. The proton exchange membrane of the application adopts a polybenzimidazole homopolymer as the matrix, and simultaneously adopts a polybenzimidazole copolymer containing a nitrogen-containing heterocyclic structural unit as the proton active component, so that the proton exchange membrane of the application has higher acid loading capacity (especially phosphoric acid loading capacity) and proton conductivity, and simultaneously has good mechanical properties and dimensional stability.

Provided are methods of preparing carbon molecular sieve (CMS) hollow fiber membranes derived from polybenzimidazole (PBI) hollow fiber membranes, obtained by contacting a PBI hollow fiber membrane with a cross-linking or acid solution prior to carbonization. CMS hollow fiber membranes obtained by these methods, and methods of using said CMS hollow fiber membranes for fluid separation and purification, are also provided.

The invention relates to the technical field of polybenzimidazole, and discloses an application of polybenzimidazole in preparation of a high-transparency low-haze force-induced discoloration film, the polybenzimidazole comprises a structural unit A and a structural unit B, the structural unit A has a structure as shown in a formula (1), and the structural unit B has a structure as shown in a formula (2); wherein X1 is fluorine-containing alkylene,-O-,-SO2-or-CO-, X2 is a connecting bond,-O-,-SO2-or-CO-, and X1 is different from X2; r1 and R2 are the same or different, and are independently selected from any one of arylene, cycloalkylene, alkenylene, heteroalkylene and fluorine-containing alkylene. The polybenzimidazole provided by the invention has a mechanochromic property, and the polybenzimidazole provided by the invention can be used for preparing a polybenzimidazole film with light color, high transparency and extremely low haze.

The application relates to the technical field of battery separators, and discloses a PE-PBI composite battery separator as well as a preparation method and application thereof. The PE-PBI composite battery separator comprises the following raw materials in parts by weight: 58-70 parts of a separator base material, 5-10 parts of an ionic liquid, 5-10 parts of a carbonate, and 3-6 parts of lithium bis-trifluoromethanesulfonimide; the separator base material comprises polyethylene and polybenzimidazole; the ionic liquid comprises 1-butyl-3-methylimidazolium hexafluorophosphate and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide; and the carbonate comprises ethylene carbonate and / or vinylene carbonate. The application effectively improves the ionic conductivity of the separator through the synergistic cooperation between the two specific ionic liquids, ethylene carbonate and LiTFSI, and the two ionic liquids [BMIM][PF6] and [P 13 ][TFSI].

This invention discloses a polyimide-polybenzimidazole intermolecular composite profile and its preparation method. The preparation method is as follows: First, polybenzimidazole is pre-dissolved to form a homogeneous solution to allow its polymer chains to unfold. Then, aromatic diammonium is added to the system. After the diammonium is completely dissolved, aromatic dianhydride is added to generate polyamic acid in situ in the system. Then, thermal imidization is performed to form a polyimide / polybenzimidazole composite material with entangled polymer chains. This preparation method can achieve full mixing between the polyimide and polybenzimidazole polymer chains. The polyimide-polybenzimidazole intermolecular composite material prepared by this method has advantages such as easy molding and easy processing. The molded profile has good strength and toughness and can be widely used in high-end fields such as aerospace high-temperature structural parts, high-end sealing components, high-temperature wear-resistant parts for new energy equipment, and chemical corrosion-resistant structural profiles.

The application belongs to the technical field of proton exchange membranes, and discloses a high-chemical-stability non-charged proton exchange membrane for acid recovery by diffusion dialysis, a preparation method and application thereof. A strong electron-attracting C-F bond, a sulfonyl unit [-SO2-] and a nitrogen-containing heterocycle capable of being protonated are introduced into a polybenzimidazole main chain, and two copolymerization modes are adopted, namely, copolymerization of a carboxylic acid monomer containing a strong electron-attracting group and a tetramine monomer containing a heterocyclic nitrogen, and copolymerization of a carboxylic acid monomer containing a heterocyclic nitrogen and a tetramine monomer containing a strong electron-attracting group; or a multi-monomer copolymerization strategy such as a two-monomer copolymerization strategy and a three-monomer copolymerization strategy can be simultaneously adopted, and then a solution is coated by a film coater to form a film. The non-charged proton exchange membrane prepared by the method has excellent acid recovery performance and chemical stability.