991 results about "Poly(benzimidazole)" patented technology

A semiconductor wafer support pin assembly. A susceptor has at least three support pins configured to raise a wafer above the top surface of the susceptor. Each support pin includes and upper pin and a lower pin, which lock together by means of a quick-release mechanism in the form of a bayonet mount. The upper pin is made of a non-metallic material, such as polybenzimidazole. The susceptor is driven up and down by a lifting mechanism, driven by an electric motor or pneumatic cylinder. The susceptor moves up and down, relative to the support pins.

Polymeric coating materials used to protect electrochromic devices from environmental and mechanical damage are provided. The protective polymeric coating materials are physically, chemically and optically compatible with the electrochromic cell layers of electrochromic devices. The polymeric coating materials are polymers having generic polymer back-bones selected from the group of polyimides, polybenzimidazoles, polybenzothiazoles, polybenzoxazoles, poly(phenylene ethers), polyquinolines, polycarbonates, and polysulfones.

A method for preparing polybenzimidazole or polybenzimidazole blend membranes and fabricating gas diffusion electrodes and membrane-electrode assemblies is provided for a high temperature polymer electrolyte membrane fuel cell. Blend polymer electrolyte membranes based on PBI and various thermoplastc polymers for high temperature polymer electrolyte fuel cells have also been developed. Miscible blends are used for solution casting of polymer membranes (solid electrolytes). High conductivity and enhanced mechanical strength were obtained for the blend polymer solid electrolytes. With the thermally resistant polymer, e.g., polybenzimidazole or a mixture of polybenzimidazole and other thermoplastics as binder, the carbon-supported noble metal catalyst is tape-cast onto a hydrophobic supporting substrate. When doped with an acid mixture, electrodes are assembled with an acid doped solid electrolyte membrane by hot-press. The fuel cell can operate at temperatures up to at least 200° C. with hydrogen-rich fuel containing high ratios of carbon monoxide such as 3 vol % carbon monoxide or more, compared to the carbon monoxide tolerance of 10-20 ppm level for Nafion®-based polymer electrolyte fuel cells.

The invention relates to a preparation method for aromatic series polybenzimidazole resin film, comprising: (1) under function of polyphosphoric acid / phosphorus pentoxide system, condensation polymerization reaction is carried out to aromatic series amine and aromatic series dicarboxylic acids mixed according to mol ratio of 1:1 in nitrogen atmosphere; (2) after cooling, polymer is poured into water and broken down into powder in a resin pulper and washed over and over again by distilled water and soaked for 48 hours in NaHCO3 solution and washed till pH value shows neutral and drawn and filtered for drying in vacuum; (3) the polymer dried is dissolved in even solution prepared by organic solvent with mass percent of 5 percent, and then is dried at temperature of 130 DEG C for 12 hours, and is soaked in hot water for boiling and striping, and is dried in vacuum at temperature of 100 DEG C for 5 hours and then is obtained. The polybenzimidazole prepared by the invention has the advantages of big molecule weight, stable thermal stability, fine solubility and film forming performance, etc. The preparation has simple technology, low cost, convenient operation and can be finished in common equipments through preparation procedure.

A process for producing a graphitic film comprising the steps of (a) mixing graphene platelets with a carbon precursor polymer and a liquid to form a slurry and forming the slurry into a wet film under the influence of an orientation-inducing stress field to align the graphene platelets on a solid substrate; (b) removing the liquid to form a precursor polymer composite film wherein the graphene platelets occupy a weight fraction of 1% to 99%; (c) carbonizing the precursor polymer composite film at a carbonization temperature of at least 300° C. to obtain a carbonized composite film; and (d) thermally treating the carbonized composite film at a final graphitization temperature higher than 1,500° C. to obtain the graphitic film. Preferably, the carbon precursor polymer is selected from the group consisting of polyimide, polyamide, polyoxadiazole, polybenzoxazole, polybenzobisoxazole, polythiazole, polybenzothiazole, polybenzobisthiazole, poly(p-phenylene vinylene), polybenzimidazole, polybenzobisimidazole, and combinations thereof.

A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by layering a solution of polybenzimidazole (PBI) and α,α′dibromo-p-xylene onto a porous support and evaporating solvent. A supported membrane of cross-linked poly-2,2′-(m-phenylene)-5,5′-bibenzimidazole unexpectedly exhibits an enhanced gas permeability compared to the non-cross linked analog at temperatures over 265° C.

The present invention relates to a binder composition for a fuel cell including a proton conductor and one or more binders selected from the group consisting of poly[2,2′-(m-phenylene)-5,5′-bibenzimidazole] (PBI), poly[2,5-benzimidazole] (ABPBI), polybenzoxazole (PBO), and polybenzothiazole (PBT).

Synthesis and use of a new class of polymeric materials with favorable separation characteristics for the dehydration of ethanol and other organic solvents is described herein. The thermally rearranged (TR) polybenzoxazole (PBO), polybenzimidazole (PBI) and polybenzothiazole (PBT) membranes of the present invention can be used for the dehydration of ethanol during processing to fuel grade biodiesel by either pervaporation or vapor permeation. The unique microstructure of the membranes provides excellent separation characteristics, and this, coupled with their inherent thermal and chemical stability, enables their usage in other separations, such as the dehydration of other organic solvents.

The invention relates to a preparation method of a polybenzimidazole crosslinking membrane that is crosslinked with bihalohydrocarbon or polyhalohydrocarbon, which takes amino dibasic acid and aromatic tetraamine as monomer raw material and polyphosphoric acid as reaction medium and reaction is carried out for 5-30 hours at 150-220 DEG C under the nitrogen protection condition so as to obtain homopolymer containing amino polybenzimidazole, and takes the amino dibasic acid, nonaminonic dibasic acid and the aromatic tetraamine as the monomer raw materials to prepare copolymer containing amino polyphosphoric under the same conditions. The prepared homopolymer and the copolymer of the polybenzimidazole have good dissolvability in solvents of dimethyl sulphoxide, N, N-dimethylacetamide, phosphate, vitriol and methane-sulforic acid, etc. Both the structures of the homopolymer and the copolymer of the polybenzimidazole contain amino that can be used for crosslinking. The bihalohydrocarbon or the polyhalohydrocarbon is used as cross linking agent. The polybenzimidazole crosslinking membrane with good property can be prepared through crosslinking reaction of the amino contained in the polybenzimidazole and the bihalohydrocarbon or the polyhalohydrocarbon.

The invention relates to high-temperature-resistant heat-insulation paint and a preparation method thereof and belongs to the technical field of materials. The paint is used for heat-insulation protection of spacecrafts. The paint comprises, by weight, 25-35 parts of epoxide resin modified organic silicon resin containing nano particles, 10-20 parts of polybenzimidazole, 5-10 parts of high-temperature-resistant inorganic nonmetal compounds, 20-30 parts of high-temperature-resistant fillers, 1-3 parts of curing agents and 5-27 parts of solvents. The paint is high-temperature resistant, low in thermal conduction, high in shock resistance, low in density, good in bonding capacity, good in comprehensive performance index and capable of guaranteeing strength and rigidity of structural materials under the high temperature condition and meeting harsh requirements of aviation and space fields.

Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.

The present invention relates to a polymer blend proton exchange membrane comprising a soluble polymer and a sulfonated polymer, wherein the soluble polymer is at least one polymer selected from the group consisting of polysulfone, polyethersulfone and polyvinylidene fluoride, the sulfonated polymer is at least one polymer selected from the group consisting of sulfonated poly(ether-ether-ketone), sulfonated poly(ether-ketone-ether-ketone-ketone), sulfonated poly(phthalazinone ether keton), sulfonated phenolphthalein poly(ether sulfone), sulfonated polyimides, sulfonated polyphosphazene and sulfonated polybenzimidazole, and wherein the degree of sulfonation of the sulfonated polymer is in the range of 96% to 118%. The present invention further relates to a method for manufacturing the polymer blend proton exchange membrane.

Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polybenzimidazoles by phase inversion and are then crosslinked by addition of crosslinking agents. These stabilise the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase inversion, and in strongly acidic and strongly basic solvents.

Resin compositions, which contain: (a) a heat-resistant resin which is soluble in organic solvents wherein the heat-resistant resin is one or more heat-resistant resin(s) selected from the group consisting of a polyimide resin, a polyamide-imide resin, a polyamide resin, a polyether imide resin, a polybenzoxazol resin, a polybenzimidazole resin, copolymers thereof, and mixtures thereof; (b) a thermosetting resin; (c) a filler; and (d) resin having a polybutadiene structure and / or a polysiloxane structure, wherein: the heat-resistant resin (a) and the thermosetting resin (b) are present in a weight ratio of heat-resistant resin (a) to thermosetting resin (b) of from 100:1 to 1:1; the heat-resistant resin (a), thermosetting resin (b), and filler (c) are present in relative amounts such that weight ratio of the total amount of heat-resistant resin (a) and thermosetting resin (b) to filler (c) by weight is from 100:1 to 3:2; the resin having a polybutadiene structure and / or a polysiloxane structure (d) is present in an amount of 0.1 to 15 parts by weight based on 100 parts by weight of the heat-resistant resin (a); and the heat-resistant resin (a), thermosetting resin (b), filler (c), and resin having a polybutadiene structure and / or a polysiloxane structure (d) are present in a total amount of not less than 70% by weight, based on the total weight of the resin composition, are useful for preparing adhesive films, which are, in turn, useful for forming interlayer insulation layers for multi-layered printed wiring boards having an excellent mechanical strength and capable of being roughened by an oxidizing agent.

The invention relates to a high temperature high pressure bulking dyeing method which comprises dyeing and after treatment. By adoption of the dyeing method of the invention, fibers or textile fabrics like aramid fibers, polysulfonamide fibers, polyphenylene sulfides, polybenzimidazole, poly-p-phenylene benzobisoxazole fibers, phenol formaldehyde resins, fibrilia and so on which have high crystallinity and high orientation degree or high glass transformation temperature can be dyed, and fibers after dyeing have the advantages of evenness, bright colors, high dyefastness, improvement of light fastness and little impact on physical properties.

The invention belongs to the technical field of functional high molecular materials and electrochemical electrochemistrytechniques, in particular to an enhanced compound proton exchange membrane based on the semi-interpenetrating net, and a preparation method thereof. The method comprises synthesizing the linear polybenzimidazole polymer containing crosslinkable groups, blending the linear polybenzimidazole polymer and perflurinated sulfonic acid resin, using the specific method to crosslink polybenzimidazole polymer during membrane forming process, and forming the compound membrane with the semi-interpenetrating net structure. , thus The the compound membrane is attached withhas good mechanical property and high proton conductivity. The method disclosed by the invention is characterized in by good preparation controllability. Compared with the traditional perflurinated sulfonic acid membrane, the enhanced compound proton exchange membrane based on the semi-interpenetrating net is characterized in by high mechanical strength and good size stability, and has a wide application future in polymer electrolyte membrane fuel cells.

The invention relates to a method for preparing a polybenzimidazole crosslinking membrane by using epoxy compounds, which takes amino dibasic acid and aromatic tetraamine as monomer raw material and polyphosphoric acid as reaction medium and reaction is carried out for 5-30 hours at 150-220 DEG C under the nitrogen protection condition so as to obtain homopolymer containing amino polybenzimidazole, and takes the amino dibasic acid, nonaminonic dibasic acid and the aromatic tetraamine as the monomer raw materials to prepare copolymer containing amino polyphosphoric under the same conditions. The prepared homopolymer and the copolymer of the polybenzimidazole have good dissolvability in solvents of dimethyl sulphoxide, N, N- dimethylacetamide, phosphate, vitriol and methane-sulforic acid, etc. The bifunctionality or polyfunctional epoxy compounds are used as cross linking agent. The polybenzimidazole crosslinking membrane that has good property can be prepared through crosslinking reaction of the amido contained in the polybenzimidazole and epoxy functional groups contained in the bifunctionality or polyfunctional epoxy compounds.

The invention provides quaternized polybenzimidazole and a preparation method thereof. Polyanions are formed by polybenzimidazole and derivatives thereof (PBIs) under the function of a dehydrogenized reagent and a solvent, small molecules such as tertiary amine halide, methyl iodide and the like are inoculated to the side chain of the polybenzimidazole molecule and ion exchange is carried out in an alkaline solution, therefore, the quaternized polybenzimidazole with good thermal stability, solubility and membrane forming performance can be prepared. The quaternized polybenzimidazole can be used as an OH<->ion-exchange membrane in alkali fuel cells and has broad application prospect.

The invention relates to an electrolyte membrane and application of a composite membrane thereof in a liquid-flow energy storage battery with acidic electrolyte. The electrolyte membrane uses polybenzimidazole or other aromatic heterocyclic polymers as a base membrane or is doped with a strong-acidity solution through composite techniques comprising an organic / inorganic technique, an organic / organic technique, a blending technique, a crosslinking technique, a strengthening technique and the like so that the acid content, the proton conductivity and the mechanical strength of the composite membrane are improved. Different from the traditional electrolyte membrane containing functional groups, the novel electrolyte membrane does not contain iron conduction groups, but utilizes acid in the electrolyte as the electrolyte to conduct protons. Due to the adoption of a Hopping conduction mechanism, the membrane reduces the iron permeation and the water migration of the liquid-flow energy storage battery, greatly reduces the crossing of anode and cathode electrolyte and prolongs the service life of the electrolyte. The preparation process is simple, and the prepared electrolyte membrane can effectively satisfy the requirements on the performance and the stability of the liquid-flow energy storage battery.

The present invention provides high temperature compositions comprising blends of a first polymer, poly(aryl ether ketone phthalazinone)s, and a second polymer, selected from poly(aryl ether ketone)s, poly(aryl ketone)s, poly(ether ether ketone)s, poly(ether ketone ketone)s, or polybenzimidazoles, thermoplastic polyimides, polyetherimides, poly(aryl ether sulfone)s, poly(phenylene sulfide)s, and mixtures thereof. The compositions have improved high temperature characteristics, e.g., improved high temperature load capability and improved high temperature melt processibility.

The invention relates to a synthesis method for a block-type sulfonated polyimides-polybenzimidazole proton conductive material. The solution polycondensation method is adopted, wherein tetramine and diacid are used as monomers, and are mixed with a sealing terminal agent to prepare polybenzimidazole with the end sealed by an amino group; dianhydride, non-sulfonated diamine and sulfonated diamine are adopted as monomers to prepare sulfonated polyimide with the end sealed by an anhydride; the saturated sodium chloride solution substitution method is adopted to convert the sulphonic-acid-type sulfonated polyimide into sodium-type sulfonated polyimide; polybenzimidazole with the end sealed by the amino group and the polyimide with the end sealed by anhydride are further polymerized to prepare block-type polybenzimidazole-sulfonated polyimides; the segment of polybenzimidazole has a certain high temperature proton transference function and has no dependency on water, can increase the conductivity of a membrane material at a high-temperature and low-humidity condition; compared with the conventional sulfonated polyimide membrane, the hydrolytic stability, the dimensional stability and the mechanical property are remarkably increased; the block-type sulfonated polyimides-polybenzimidazole proton conductive material has a wide application prospect in the field of polymer electrolyte membrane fuel cells.

The invention relates to a proton exchange membrane, particularly relates to a preparation method for a compound proton exchange membrane for a high-temperature-resisting fuel cell, and belongs to the field of fuel cells. According to the preparation method, a precursor containing an imidazole ring is put into a polybenzimidazole solution to be directly subjected to a sol-gel method to be crossly linked into a membrane and the membrane is adsorbed with phosphoric acid to be prepared into a phosphoric acid doped proton exchange membrane. Compared with the prior art, the preparation method for the compound proton exchange membrane for the high-temperature-resisting fuel cell has the following advantages that the precursor containing the imidazole ring is put into the polybenzimidazole solution to be directly subjected to the sol-gel method to be crossly linked into the membrane; the preparation method is simple and controllable; an imidazole structure contained in a silicon nano particle can react with the phosphoric acid to generate an imidazolium salt; one part of the phosphoric acid is fixed and the generated imidazolium salt has a certain adsorption effect on the free phosphoric acid, so that the adsorption capability to the phosphoric acid by a PBI (Polybenzimidazole) compound membrane is improved greatly and the leakage and loss of the phosphoric acid are inhibited; therefore, the proton conductivity of the proton exchange membrane is improved.

A sliding bearing includes a bearing alloy layer having a sliding surface and a resin surface layer formed on the sliding surface of the bearing alloy layer and containing polybenzimidazole and a solid lubricant. In manufacturing the sliding bearing, a resin surface layer composition is applied to a roughened surface of a bearing alloy layer. The resin surface layer composition contains polybenzimidazole and a solid lubricant. The resin surface layer composition is heated so as to be hardened to be formed into a resin surface layer.

The invention provides a manufacturing method of photosensitive resin composition capable of forming a solidifying film causing no color change even on copper or copper alloy. The invention also provides a manufacturing method of a solidified embossing pattern by adopting the photosensitive resin composition to form pattern, and a semiconductor device. The photosensitive resin composition includes by mass: (A) 100 parts of at least one resin selected from a group formed by polyamide acid and polyamide acid esters as polyimide precursor, and poly oxyamide, poly amino acid amide, polyamide, polyamide imide, polyimide, polybenzoxazole, imidite and polybenzothiazole as poly oxazole precursor; (B) 0.01 to 10 parts of purine derivatives; and (C) 1 to 50 parts of sensitizer.

A polybenzimidazole-base complex includes a polybenzimidazole-based material and a base, wherein a peak corresponding to NH of an imidazole ring of the polybenzimidazole-based material does not appear at a chemical shift of 12 to 15 ppm in a 1H nuclear magnetic resonance (1H-NMR) spectrum of the polybenzimidazole-base complex. A crosslinked material may be formed as a polymerization product of a polybenzimidazole-base complex and a benzoxazine-based monomer. The crosslinked material may be used an electrolyte membrane for a fuel cell comprising the crosslinked material, and a fuel cell may include the electrolyte membrane.

The present invention presents a mixed-matrix composite material comprising a continuous phase and zeolitic imidazolate framework (ZIF) particles dispersed in the continuous phase, wherein the continuous phase is polybenzimidazole (PBI), methods for making the mixed-matrix composite material, and methods for separating gas or vapor from a mixture of gases or vapors using the mixed-matrix composite material.

The invention relates to application of a heat-resistant porous diaphragm to a lithium ion battery. The porous diaphragm is prepared from one or more than two of heat-resistant high-molecular polymers such as polysulfone, polyketone, polyimide, polybenzimidazole and polyetherimide; the pore diameter of the porous diaphragm is 5-500 nm, and the porosity rate is 30-70%. The porous diaphragm is high in porosity rate, the pore structure of porous diaphragm is easy to regulate, and obtained pores have a certain degree of curvature, so that when the porous diaphragm is applied to the lithium ion battery, micro short circuit and self-discharge phenomena can be effectively avoided, and meanwhile, higher electrolyte affinity and cycling stability are realized. A preparation method for the diaphragm is simple, environment-friendly, and easy to popularize; the porous diaphragm has a relatively good application prospect in the field of lithium ion batteries.

The invention relates to use of a crosslinking type polybenzimidazole porous separating membrane in a liquid flow battery, and the porous membrane material is a crosslinking type polybenzimidazole polymer material. The porous membrane prepared by the invention is used in the liquid flow battery, by use of a cross-linking method and controlling of the crosslinking reaction, the membrane material oxidation stability and ion selectivity can be improved, the function of an ion exchange membrane in the liquid flow battery can be realized, the problem of capacity attenuation of a porous diaphragm can be effectively solved, the aperture of the porous membrane can be further regulated by change of variety of the polymer and the crosslinking agent of the composite membrane, ion selectivity of the porous membrane can be effectively improved, and the membrane material has the advantages of simple preparation method, controllable pore size, low cost, and easy implementation of large batch production.