550 results about "Isophthalic acid" patented technology

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention relates to the technical field of high-performance polyester, in particular to a high-strength low-shrinkage polyester fiber and a preparation method thereof. The defects that existing polyester fibers are poor in strength and shrinkage resistance are overcome. The preparation method comprises the following steps: mixing the modified resin, the modified nano silicon dioxide, the composite antioxidant, the composite nucleating agent and the composite lubricant, and carrying out melt spinning. Wherein the modified resin is prepared from the following raw materials: dimethyl terephthalate, isophthalic acid, ethylene glycol and isosorbide; the modified nano silicon dioxide comprises nano silicon dioxide, KH570 and silver nitrate; the composite antioxidant comprises an antioxidant 1010, an antioxidant 168 and an antioxidant 1222; the composite nucleating agent comprises sodium benzoate and nano montmorillonite; the composite lubricant is prepared from ethylene bis stearamide and pentaerythritol stearate. The prepared polyester fiber is high in strength, high in shrinkage resistance and suitable for manufacturing of outdoor equipment.

The invention relates to the technical field of heat-conducting graphite materials, in particular to a POD precursor film, a POD-based graphite film and a preparation method of the POD precursor film, the POD-based graphite film and the preparation method of the POD precursor film. After the reaction is finished, obtaining an antioxidant modified aromatic polyoxadiazole polymer solution; the preparation method comprises the following steps: coating an antioxidant modified aromatic polyoxadiazole polymer solution with a wiped film, then carrying out solidification forming in a multi-stage coagulation bath, and finally neutralizing, washing and drying to obtain a POD precursor film; the coagulating bath is an aqueous solution of sulfuric acid and boron compounds and an aqueous solution of sulfuric acid. And carrying out carbonization treatment and graphitization treatment on the POD precursor film to obtain the POD-based graphite film. According to the preparation method, the boron element is cooperatively introduced into and out of the POD precursor film, so that the oxidation resistance of the graphite film is remarkably improved while the high thermal conductivity is maintained.

The invention relates to a high-temperature proton exchange membrane, in particular to a high-temperature proton exchange membrane based on silica cross-linked polybenzimidazole and a preparation method of the high-temperature proton exchange membrane. The preparation method comprises the following steps: polymerizing 3, 3 '-diaminobenzidine, 4, 4'-diphenyl ether dicarboxylic acid and 5-hydroxyisophthalic acid to form a polybenzimidazole main chain containing an ether bond and a phenolic hydroxyl group, grafting a silane coupling agent on the polybenzimidazole main chain, and finally carrying out membrane formation and acid catalysis treatment to obtain the high-temperature proton exchange membrane based on silica crosslinked polybenzimidazole. A silicon-oxygen network structure is introduced into a polybenzimidazole main chain, so that the phosphoric acid retention rate and the oxidation resistance of the polymer film can be effectively improved, and the service life of the polymer film is prolonged.

A toner includes toner particles each containing a binder resin. The binder resin contains 50% or more by mass of a polyester A containing 60 mol % or more of a unit derived from isophthalic acid as an acid component. The toner includes agglomerates on surfaces of the toner particles, each of the agglomerates containing silica and a resin. The toner has a CI (% by number) of 1% or more by number and 15% or less by number, CI being the percentage by number of the toner particles including the agglomerates. The percentage by number of the toner particles including the agglomerates satisfies predetermined requirements.

The invention belongs to the technical field of plastic processing, and particularly relates to a hydrophobic solvent-resistant biodegradable polyester material as well as a preparation method and application thereof in plastic bottles. The preparation method of the hydrophobic solvent-resistant biodegradable polyester material comprises the following steps: reacting polyol glycidyl ether with acrylic acid to prepare polyol glycidyl ether acrylate; the preparation method comprises the following steps: reacting isophthalic dihydrazide with polyol glycidyl ether acrylate to prepare a modifier; pBAT reacts with a modifier and an acrylic acid fluorine monomer to obtain the hydrophobic solvent-resistant biodegradable polyester material. The hydrophobic solvent-resistant biodegradable polyester material adopts PBAT as matrix resin, has biodegradability, has good hydrophobicity and solvent resistance through modification treatment of the modifier and the acrylic acid fluorine monomer, and can be applied to manufacturing of plastic bottles.

The invention discloses unsaturated polyester resin for an optical cable reinforcing core and a preparation method thereof, and belongs to the technical field of unsaturated polyester resin. The composition is composed of the following components: PG, IPA, a catalyst, maleic anhydride, AA, styrene, an antioxidant, a first polymerization inhibitor, a second polymerization inhibitor and a third polymerization inhibitor. The ratio of alcohol to acid is (1.08-1.12): 1; the activity is (3.4-3.8): 1; the molar ratio of AA to IPA is 1: (12-16); the preparation method comprises the following steps: 1) uniformly mixing propylene glycol, a catalyst and isophthalic acid; 2) raising the temperature, preserving the heat and raising the temperature again; cooling, sequentially adding a first polymerization inhibitor, maleic anhydride and adipic acid, heating, keeping the temperature, and heating again; 3) cooling and adding a second polymerization inhibitor, and 4) cooling and adding styrene, a third polymerization inhibitor and an antioxidant, uniformly mixing, and cooling to less than or equal to 60 DEG C to obtain the unsaturated polyester resin for the optical cable reinforcing core. The unsaturated polyester resin for the optical cable reinforcing core has the characteristics of high bending strength and high temperature resistance.

The invention relates to a preparation method and application of a polyamide surface functionalized polyvinyl alcohol fiber, and belongs to the technical field of biodegradable fibers. According to the method, polyamide is grafted to polyvinyl alcohol fibers through a two-step method. The preparation method comprises the following steps: grafting carboxyl onto the surface of the polyvinyl alcohol fiber through succinic anhydride grafting modification, and further grafting 5-aminoisophthalic acid onto the surface of the polyvinyl alcohol fiber through amidation reaction. The polyamide surface-functionalized polyvinyl alcohol fiber prepared by the method has excellent performance, and the maximum pull-out load and the corresponding pull-out strength of the polyamide surface-functionalized polyvinyl alcohol fiber in a biodegradable plastic film are obviously superior to those of unmodified polyvinyl alcohol fiber or polyvinyl alcohol fiber subjected to surface modification by using succinic anhydride alone; particularly, the maximum pull-out load and the corresponding pull-out strength of the modified fiber in the biodegradable plastic film after the modified fiber reacts at 40 DEG C for 1.5 h reach the maximum value, and the whole biodegradable plastic after fiber reinforcement still keeps the biodegradable performance. As a method for regulating and controlling the interface bonding force between the polyvinyl alcohol fiber and a biodegradable plastic matrix, the method is expected to be applied to preparation of biodegradable efficient reinforced fiber, and the application prospect of the polyvinyl alcohol fiber is improved.

This invention discloses a one-piece molded all-plastic flexible hose sheet and its composite hose, belonging to the field of polymer material technology. The one-piece molded all-plastic flexible hose sheet of this invention has a three-layer structure: an outer PE film, an intermediate layer, and an inner PE film. The intermediate layer is selected from one of the following: an intermediate polymer layer, a three-layer composite layer formed by an intermediate polymer layer, a polyethylene layer, and an intermediate polymer layer, or a three-layer composite layer formed by an intermediate polymer layer, an ethylene-vinyl alcohol copolymer layer, and an intermediate polymer layer; the intermediate layer may have a double-sided coated or uncoated adhesive layer; the intermediate polymer layer is polymerized from 2,6-dihydroxyisophthalic acid, diaminoalkane, and 4,4'-tetraphenylsilane. The all-plastic flexible hose sheet provided by this invention is formed in one piece using a five-layer co-extrusion machine, possessing excellent gas barrier properties, water vapor barrier properties, high mechanical strength, and good interlayer peel strength.

The invention discloses an epoxy powder coating and a preparation method thereof, and belongs to the technical field of powder coating production, firstly, the epoxy powder coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy resin, 15-20 parts of modified phenolic resin, 12-15 parts of carboxyl-terminated polyester resin, 4-8 parts of nano cerium oxide coated mica, 1.5-2.0 parts of a flatting agent and 0.5-1.0 part of benzoin; the modified phenolic resin is prepared by carrying out addition on bisphenol A phenolic resin and DOPO, neutralizing and carrying out reduced pressure distillation; the carboxyl-terminated polyester resin is prepared by carrying out esterification polycondensation on terephthalic acid, isophthalic acid, neopentyl glycol and trimethylolpropane, and then modifying by trimellitic anhydride; the nano cerium oxide coated mica is prepared by coating white mica powder with cerium oxide precipitate, and then carrying out surface treatment and crushing.

The invention relates to a preparation device of isophthalic acid-5-sodium sulfonate, and belongs to the technical field of preparation of isophthalic acid-5-sodium sulfonate. Comprising a reaction kettle body, a top cover is arranged at the top of the reaction kettle body, a jacket is arranged in the reaction kettle body, a discharging pipe and a heat-carrying medium inlet pipe are arranged at the bottom of the reaction kettle body, and the discharging pipe is communicated with the interior of the reaction kettle body; the invention also discloses a preparation method. Through rotation of the stirring shaft, the mixing and stirring effects can be achieved, the annular discharging base can be driven to rotate, multiple manual operations are not needed in the whole process, and the effects of automatic material distribution and batch discharging can be achieved only by putting all the needed isophthalic acid into the reaction kettle body at a time; the device is simple to operate, improves the working efficiency, is safe in operation process, is not liable to cause harm to a human body, can meet the requirement of automatic feeding, and can enable the whole production process to be more precise.

The invention relates to the technical field of powdered ink, and discloses a plant-based environment-friendly powdered ink composition which comprises the following components: resin, a coloring agent, a charge control agent, wax / a release agent and an additive. The resin comprises polyester resin and bio-based resin. The polyester resin comprises polyhydric alcohol and polybasic acid. The polyol comprises ethylene glycol, neopentyl glycol and a bisphenol A derivative. The polybasic acid comprises terephthalic acid, isophthalic acid and oxalic acid. Compared with the prior art, the plant-based environment-friendly powdered ink composition provided by the invention has the advantages that the plant-based environment-friendly powdered ink composition is based on a plant-oil-based biodegradable material and is prepared from plant oil, polyhydric alcohols and polybasic acid compounds, so that the excellent biodegradability and moisture resistance of the plant oil are kept; and when the resin is used for preparing the biological powdered ink, the biodegradability and moisture resistance of the powdered ink can be effectively improved, and the biological powdered ink prepared from the resin has excellent biodegradability, moisture resistance, performance retentivity and fixing strength.

The invention relates to rosin modified resin and a preparation process thereof and low-odor printing ink, the rosin modified resin is prepared from maleic anhydride, sulfonate alkyd resin, rosin and a metal organic framework, and the sulfonate alkyd resin is prepared from neopentyl glycol, dibutyltin dilaurate, m-phthalic acid-5-sodium sulfonate, phthalic anhydride and pentaerythritol. The printing ink has the effect of improving the strength and smell of the printing ink.

The invention discloses Pseudomonas putida, a bacterial agent thereof and an application of the Pseudomonas putida in chemical wastewater treatment, the Pseudomonas putida is named as PH-20 and preserved in the China General Microbiological Culture Collection Center on March 17, 2025, and the preservation number of the strain is CGMCC No. 33831. The invention further discloses a preparation method of the Pseudomonas putida. The pseudomonas putida disclosed by the invention can be used for rapidly degrading polybenzoic acid such as terephthalic acid, phthalic acid, isophthalic acid, trimellitic acid, trimellitic acid and pyromellitic acid in wastewater under the conditions of high salt and low temperature, and the degradation effect is still excellent under the condition that various pollutants coexist.

The invention discloses a simple preparation method of a barium-based metal organic framework (Ba-H2Sip) and proton conduction application of the barium-based metal organic framework (Ba-H2Sip), belongs to the field of functional material synthesis and energy application, and is characterized in that functional differentiation design of a 5-sulfoisophthalic acid ligand: a sulfonic group forms a two-dimensional layered structure by chelating Ba < 2 + >; the carboxyl groups are differentiated into'anchoring carboxyl groups' for constructing a three-dimensional supramolecular skeleton and'proton supply carboxyl groups' for providing a proton source, and the design is reported for the first time in Ba-based MOFs; according to the present invention, the large-scale preparation can be achieved by stirring the low-cost raw material in 1 mol / L hydrochloric acid at the room temperature, the yield exceeds 70%, the product can resist 8 M acid and pH = 13 alkali liquid, the conductivity at 90 DEG C / 90% humidity can achieve 1.39 * 10 <-2 > Scm <-1 >, the high-temperature process is not required, the raw material is low in cost and easy to obtain, and the feasible scheme is provided for the high-efficiency proton conductor industrialization.

A desulfurizing agent according to the present disclosure is a desulfurizing agent for removing a sulfur compound from a fluid containing moisture and the sulfur compound, the desulfurizing agent comprising: at least one metal ion selected from the group consisting of aluminum ions, iron ions, and copper ions; and an organic ligand coordinated to a metal ion, the organic ligand containing isophthalic acid optionally having a substituent group at the 5-position of a benzene ring, and diffraction peaks respectively present in the range of diffraction angles of 10.9 DEG + / -0.3 DEG and the range of diffraction angles of 18.1 DEG + / -0.3 DEG in an X-ray diffraction pattern of the desulfurizing agent measured using Cu-K alpha rays.

The invention relates to an amorphous low-temperature-resistant polyester composition and a preparation method thereof. The amorphous low-temperature-resistant composition consists of the following raw materials: a rigid structural unit of copolyester consisting of purified terephthalic acid and phenyl glycol; purified terephthalic acid, isophthalic acid and 1, 4-butanediol form an amorphous flexible structure unit; different linear molecular chains are reasonably connected through a branching agent, the acting force between the molecular chains is increased, the defect that the acting force between linear high molecular molecules is low is overcome, and finally the amorphous low-temperature-resistant polyester composition with soft / hard blocks and a branched structure is formed.

The invention relates to the technical field of layered materials, in particular to an antibacterial layered composite elastic fabric and a preparation method thereof. The defects that an existing layered fabric is poor in antibacterial property and elasticity are overcome. The preparation method comprises the following steps: preparing modified spandex fiber yarns by taking polytetrahydrofuran ether glycol, diphenylmethane diisocyanate and modified microcrystalline cellulose as raw materials; preparing modified polyester fiber yarns by taking terephthalic acid, ethylene glycol, 1, 4-butanediol, isophthalic acid and nano silicon dioxide as raw materials; plying the modified polyester fiber yarns and the modified spandex fiber yarns, and weaving to obtain an outer-layer fabric; performing pretreatment, dipping and heat treatment on the outer layer fabric to obtain an outer layer finished fabric; performing dipping and heat treatment on the inner-layer fabric to obtain an inner-layer finished fabric; the antibacterial layered composite elastic fabric obtained by laminating and compounding the outer-layer finishing fabric and the inner-layer finishing fabric has strong antibacterial property and strong elasticity, and is suitable for manufacturing outdoor textiles.

Provided is a toner that includes a toner particle containing a binder resin; and an external additive, wherein the binder resin contains a polyester resin A; when a content of the polyester resin A in the binder resin is taken as Wp (mass %), Wp is 50 mass % or more; when a content ratio of the monomer unit Uiso corresponding to isophthalic acid to all monomer units corresponding to polycarboxylic acids in the polyester resin A is taken as MIPA (mol %), MIPA is 40 mol % or more; the external additive contains inorganic fine powder; and the inorganic fine powder contains a silica fine particle having aluminum hydroxide on the surface thereof.

The invention provides a Zn-MOF material, a preparation method thereof and application of the Zn-MOF material in Congo red dye adsorption, and relates to the technical field of metal organic framework materials. The preparation method provided by the invention comprises the following steps: reacting 2-methylimidazole with 3, 6-dichloropyridazine in an alkaline solvent environment to generate 3, 6-bis (2-methylimidazole) pyridazine; the preparation method comprises the following steps: mixing and coordinating 3, 6-bis (2-methylimidazole) pyridazine, isophthalic acid and a zinc source to prepare a Zn-MOF material; the Zn-MOF material prepared by the preparation method disclosed by the invention can be used for effectively adsorbing Congo red.

The application discloses an indium-based oxide catalyst, which is prepared by the following method: step one, adding indium nitrate, isophthalic acid, DMF, acetonitrile, imidazole and nitric acid into a reaction kettle, reacting at 80 DEG C for 12 hours, then heating to 100 DEG C and reacting for 24 hours, washing with DMF and anhydrous ethanol respectively, and vacuum drying for 12 hours to obtain an In-MOF precursor; step two, keeping the In-MOF precursor under the condition of nitrogen atmosphere and 200-600 DEG C for 4 hours, and naturally cooling to room temperature to obtain the indium-based oxide catalyst. Most of the prepared indium-based oxide catalysts still retain the corresponding three-dimensional hierarchical porous framework structure of the original MOF; the indium-based oxide catalyst contains highly dispersed metal active sites inside, effectively reduces the aggregation of metal oxides or metal elements, and thus exhibits more excellent catalytic activity; the organic ligand isophthalic acid generates a large amount of carbon material through pyrolysis under an inert atmosphere, greatly improving the conductivity of the indium-based oxide catalyst.

The invention provides a covalent organic framework proton exchange membrane, a preparation method thereof and a high-temperature proton exchange membrane fuel cell. The preparation method comprises the following steps: dispersing 5-bromomethyl-dimethyl isophthalate and trimethylamine in alcohol to obtain a reaction solution, and performing water bath and rotary evaporation to obtain a first intermediate; dispersing the first intermediate in a hydrazine hydrate / ethanol mixed solution, reacting at 80-100 DEG C for 24-48 hours, and recrystallizing to obtain a second intermediate; dispersing the second intermediate and silver chloride in water, and carrying out inert gas reaction at 80-100 DEG C for 10 hours to obtain a quaternary ammonium type amine monomer; dissolving a quaternary ammonium type amine monomer and glacial acetic acid in water to obtain an amine monomer solution; the preparation method comprises the following steps: dissolving 1, 3, 5-benzenetricarboxaldehyde and 1, 4-dioxane in mesitylene to obtain an aldehyde monomer solution; adding the aldehyde monomer solution above the amine monomer solution to obtain an interfacial polymerization reaction system, reacting at 16-40 DEG C for 7 days, and filtering to obtain a nanosheet dispersion liquid; dropwise adding the dispersion liquid into a suction filtration container, performing vacuum suction filtration to form a membrane, and then adding a phosphoric acid solution to enable phosphoric acid molecules to enter the membrane to obtain the covalent organic framework proton exchange membrane.

The invention discloses an anti-fouling curtain structure for water dredging engineering, and belongs to the technical field of environment protection of dredging engineering, the anti-fouling curtain structure for water dredging engineering comprises a floating body, an anti-fouling curtain and a vertical body, the floating body is arranged at the top end of the anti-fouling curtain, the vertical body is arranged at the bottom end of the anti-fouling curtain, and the anti-fouling curtain is geotechnical cloth; the geotechnical cloth is prepared from the following components in parts by weight: 100 to 150 parts of polyester, 20 to 50 parts of copolyester and 5 to 30 parts of inorganic filler, the copolyester is a copolymer of terephthalic acid, 5-sulfoisophthalic acid sodium salt, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole, and the geotechnical cloth is further prepared by a post-treatment step. According to the invention, the copolyester composed of terephthalic acid, sodium 5-sulfoisophthalic acid, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole and the inorganic filler are added into the polyester fiber, and the polyester fiber is modified through a post-treatment step, so that the alkali resistance and the antifouling property of the antifouling curtain are improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant control cable and a preparation method thereof. The corrosion-resistant control cable sequentially comprises a conductor, an insulating layer, a shielding layer and a sheath layer from inside to outside, wherein the sheath layer comprises the following components in parts by weight: 50-70 parts of polyvinyl chloride, 15-25 parts of ethylene propylene diene monomer, 10-20 parts of modified graphene oxide, 0.5-1.5 parts of an antioxidant, 3-5 parts of a plasticizer, 15-20 parts of a flame retardant, 2-4 parts of a compatilizer, 4-5 parts of an active agent, 1-3 parts of an assistant crosslinking agent and 1-3 parts of a crosslinking agent; wherein the modified graphene oxide is obtained by modifying graphene oxide with dimethyl 5-hydroxyisophthalate and N-hydroxymethyl acrylamide. According to the technical scheme, the problem of insufficient corrosion resistance of the control cable in the prior art is solved.

The invention relates to the technical field of tackifiers, and discloses a preparation method and application of an organic silicon tackifier. Vinyl isophthalic acid and epoxy chloropropane are subjected to an esterification reaction under catalysis of tetraethylammonium bromide to obtain vinyl epoxypropyl isophthalate; and carrying out polymerization reaction on the modified rosin, allyl propionate modified rosin and alkenyl silicone oil under the initiation of azodiisobutyronitrile to obtain the organic silicon tackifier. And adding the organic silicon tackifier into the base material, and uniformly mixing to obtain the silicone rubber adhesive. The organic silicon tackifier prepared by the invention contains ester groups, carboxyl groups and epoxy groups with relatively strong polarity, and is easy to chemically react with a base material or form secondary valence bonds, so that the adhesion of a silicon rubber adhesive is enhanced, and the organic silicon tackifier is easy to tangle with each other after being added into silicon rubber to form a network structure, so that the mechanical property of the silicon rubber is enhanced. The tackifier prepared by the invention has excellent mechanical property and adhesive property when being applied to silicone rubber.

The invention relates to a laundry gel bead with multi-effect cleaning power and a preparation method thereof, the laundry gel bead with multi-effect cleaning power comprises the following components: an amphiphilic polymer, isomeric alcohol polyoxyethylene ether, ethoxylated propoxylated fatty alcohol, fatty acid, a surfactant, protease, cellulase, a neutralizer, an auxiliary agent and a solvent, the amphiphilic polymer is obtained by further carrying out condensation polymerization on a reaction product of 5-bromomethyl dimethyl isophthalate and dimethylaminoethyl methacrylate, terephthalic acid, ethylene glycol and polyethylene glycol. The components such as the amphiphilic polymer, the isomeric alcohol polyoxyethylene ether, the surfactant and the enzyme are compounded, the compatibility among the various components is good, the stability of the laundry gel beads is effectively improved, the components can form a strong synergistic effect, the cleaning capacity of the product is further improved, and the laundry gel beads have good application prospects.

A polyester-based woven hook-and-loop fastener including: a woven-fabric and engaging elements, in which the woven-fabric in which a polyethylene terephthalate-based multifilament yarn is a warp yarn and a polyester-based heat-fusible multifilament yarn is a weft yarn is a woven base fabric, a yarn for the engaging elements made of at least one kind selected from the group consisting of a polyethylene terephthalate-based monofilament yarn and a polyester-based multifilament yarn, is woven in parallel to the warp yarn into the woven base fabric, the engaging elements that are formed of the yarn for the engaging elements, that are made of at least one kind selected from the group consisting of a large number of hook shapes and loop shapes, and that rise up from a front face of the woven base fabric, exist on the front face of the woven base fabric, bases of the engaging elements are fixed to the woven base fabric by a melt-solidified material of a heat-fusible component of the the polyester-based heat-fusible multifilament yarn, and the polyethylene terephthalate-based multifilament yarn is made of a copolymerized polyethylene terephthalate containing, as copolymerization components, 1.0 to 2.0 mol % of isophthalic acid with respect to a total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol with respect to a total amount of diols.

The invention belongs to the technical field of fuel cell proton exchange membranes, and discloses a hydroxyl-containing modified polybenzimidazole proton exchange membrane and a preparation method thereof. According to the modified polybenzimidazole, a monomer (5-hydroxyisophthalic acid) containing a hydroxyl structure is added during polymerization of a raw material monomer, and the novel hydroxyl-containing modified polybenzimidazole is obtained through an imidazole forming reaction. The hydroxyl-containing modified polybenzimidazole can be prepared into the modified polybenzimidazole proton exchange membrane by using a solution casting method. According to the modified polybenzimidazole disclosed by the invention, stable doping of phosphoric acid in the membrane is facilitated by introducing hydroxyl and ether bonds, so that more proton carriers are kept under an anhydrous condition, the phosphoric acid doping rate of the prepared proton exchange membrane is further improved, and construction of a proton transmission channel is facilitated. The novel hydroxyl-containing modified polybenzimidazole proton exchange membrane has a good application prospect in the aspect of proton exchange membrane fuel cells.

The invention relates to a fluoro-ligand regulated metal organic framework material and a preparation method and application thereof, the fluoro-ligand regulated metal organic framework material is prepared and synthesized by using zirconium oxychloride as a metal node and trimesic acid / 5-fluoroisophthalic acid as an organic ligand through a reflux method; the unit structural formula of the fluorinated ligand metal organic framework material is [Zr6O4 (OH) 4 (BTC) 2-x (F-BTC) x (AA) y (H2O) z], according to the preparation method, trimesic acid and part of 5-fluoroisophthalic acid are co-coordinated, a C-F bond is introduced to regulate and control the electronic environment around a Zr node through deletion of a connecting site, uniform nucleation of crystals is promoted, the grain size of the obtained material is remarkably reduced, and the dispersity is higher.