3002 results about "Dicarboxylic acid" patented technology

This invention discloses a fluorene-based organic small molecule hole transport material and its applications. The general structural formula of the fluorene-based organic small molecule hole transport material is as follows: where n = 1-4, and R represents the hole transport capacity. This fluorene-based organic small molecule hole transport material is used as an undoped hole transport material in perovskite solar cell devices. By introducing dicarboxylic acid groups onto the fluorene-based organic small molecule hole transport material, when used in an inverted perovskite solar cell device, it can form chemical bonds with the hydroxyl groups of the glass conductive substrate, forming a directionally aligned self-assembled layer on the surface of the glass conductive substrate. This effectively improves the charge transport capability at the interface and increases the photoelectric conversion efficiency of the perovskite solar cell device. Furthermore, since this perovskite solar cell device does not contain lithium salts, it exhibits high water and oxygen stability. In addition, the synthesis process of this fluorene-based organic small molecule hole transport material is simple, and the raw materials are inexpensive and readily available, making it highly valuable for practical applications.

The invention discloses a colorimetric and fluorescent dual-mode nano-enzyme sensor. The colorimetric and fluorescent dual-mode nano-enzyme sensor comprises nano-enzyme, hydrogen peroxide and a colorimetric probe, wherein the nano-enzyme is prepared from ZrCl4, 2-aminobiphenyl dicarboxylic acid and Cu (NO3) 2 by a one-pot method; the colorimetric probe is TMB, can oxidize colorless TMB into blue oxTMB, generates an ultraviolet absorption peak at 652 nm, and has a strong fluorescence emission peak at 405 + / -5 nm. The zirconium-based metal organic framework UiO-67-NH2 with high stability is used as a carrier, Zr < 4 + > sites are replaced by part of Cu < 2 + >, the fluorescent nano-enzyme with peroxidase activity is formed, and the problems that free enzyme is difficult to recover, the stability is low and the like are solved.

The invention discloses construction and application of an L-malic acid producing issatchenkia orientalis strain, and belongs to the technical field of microorganisms and the technical field of microbial fermentation and metabolic engineering. Through a metabolic engineering means, a cytoplasm metabolic pathway of an issatchenkia orientalis strain is transformed, and a pyruvate decarboxylase coding gene, glycerol dehydrogenase and lactic dehydrogenase are knocked out; a pyruvate carboxylase gene derived from aspergillus flavus, a malate dehydrogenase gene derived from corynebacterium glutamicum and phosphoenolpyruvate carboxylase derived from escherichia coli are screened and integrated, so that a cytoplasm rTCA cycle synthesis pathway is enhanced; inserting a dicarboxylic acid external transporter gene from schizosaccharomyces cerevisiae at a neutral site GD21, and knocking out endogenous dicarboxylic acid internal transporter; the L-malic acid yield of the modified yeast strain in the fermentation process is remarkably increased and reaches 140.16 g / L. The engineering strain provided by the invention has good industrial application potential in efficient L-malic acid production.

The invention discloses a waterproof anticorrosive coating and a preparation method and application thereof, and relates to the technical field of coatings, and the waterproof anticorrosive coating is prepared from the following raw materials in parts by weight: 30-40 parts of carboxyl-terminated hyperbranched polyester resin, 20-30 parts of carboxyl-terminated functional polyamide, 10-15 parts of hyperbranched polyurethane containing epoxy groups, 15-20 parts of filler, 1-3 parts of (3, 6-diamino acridine-9-yl) boric acid, 1-3 parts of 1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- the component A is prepared from the following components in parts by weight: 3-5 parts of 2, 3, 5-triglycidyl-S-triazinetrione, 1-2 parts of a coupling agent, 0.8-1.2 parts of a flatting agent and 0.6-1.3 parts of a defoaming agent; the carboxyl-terminated functional polyamide comprises a structural unit introduced by the following monomers: N-(4H-1, 2, 4-triazole-4-yl) diphenylamine-4, 4 '-dicarboxylic acid, and 3, 3'-diamino-4, 4 '-difluorodiphenyl sulfone. The coating is good in waterproof and anti-corrosion performance, high in adhesive force with a base material, sufficient in solvent resistance and aging resistance and long in service life.

The invention discloses a preparation method of antistatic modified chinlon filaments, and relates to the field of chinlon filaments. When the antistatic modified chinlon filament is prepared, (formylmethyl) diethyl phosphate and 1-aminopyrrole react to prepare pyrrole diethyl phosphate; reacting the hydroxylated multi-walled carbon nanotube with pyrrole diethyl phosphate to obtain a modified multi-walled carbon nanotube; the preparation method comprises the following steps: reacting 2, 2 '-bipyridine-5, 5'-dicarboxylic acid with 2-amino-5-nitrophenol, and then reducing to obtain a benzoxazole diamine monomer; then, adipic acid, 1, 5-diaminopentane and a benzoxazole diamine monomer are subjected to a reaction, and modified polyamide is prepared; uniformly mixing the modified polyamide, the modified multi-walled carbon nanotubes, pyrrole, ferric trichloride and copper chloride, and performing melt spinning to obtain the antistatic modified polyamide filament. The antistatic modified chinlon filament prepared by the invention has excellent antistatic, flame-retardant, anti-aging and mechanical properties.

To provide a perfluoropolyether compound expressing excellent surface tension reduction performance, and expressing excellent foamability and foam stability not only during diluting fresh water but also during diluting sea water, and a fluorine-based surface active agent including the compound.SOLUTION: A perfluoropolyether dicarboxylic acid compound or a salt thereof is expressed by the following formula (1). In the formula, Rf1 represents a 1-4C perfluoroalkyl group. R1 represents a substituted or unsubstituted 1-10C hydrocarbon group. R2 represents a substituted or unsubstituted 1-6C hydrocarbon group. R3 and R4 are same or different and each represent a substituted or unsubstituted 1-4C hydrocarbon group. n is an integer of 0-5.SELECTED DRAWING: None

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.

The invention discloses a super-hydrophobic anti-icing coating for a power transmission line and a preparation method, and belongs to the technical field of preparation of anti-icing coatings. The super-hydrophobic anti-icing coating for the power transmission line is composed of a coating wrapping the surface of the power transmission line, and the coating is composed of the following components in parts by weight: 34-45 parts of composite resin, 8-14 parts of a composite ice melting agent, 10-18 parts of deionized water, 1-3 parts of hexadecyl trimethoxy silane and 50-58 parts of tetrahydrofuran, the composite resin is prepared from carboxyl multi-walled carbon nanotubes, isopropanol, tetraethoxysilane, a silane coupling agent KH-550, perfluorodecyl trimethoxysilane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate, and the composite ice melting agent is prepared from pyridine-2, 6-dicarboxylic acid, thionyl chloride and nicotinic acid hydrazide. The coating prepared by the method has excellent hydrophobicity, wear resistance and anti-icing effect.

A process produces aliphatic monocarboxylic acids and α,ω-dicarboxylic acids or α,ω-dicarboxylic monoesters by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated fatty acids or fatty acid esters in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.

To provide an electrophotographic photoreceptor that reduces the difference in electric characteristics between the early stage and the final stage of repeated image formation and reduces the occurrence of burn-in ghost on an image, wherein these operations are achieved over a relatively large setting area related to the intensities of charging and exposure.SOLUTION: An electrophotographic photoreceptor comprises a conductive substrate, an undercoat layer, and a photosensitive layer. The undercoat layer contains a binder resin and a perinone compound. The photosensitive layer contains polyester resin (1) having at least one dicarboxylic acid unit (A) selected from the group consisting of a dicarboxylic acid unit (A2), a dicarboxylic acid unit (A3), and a dicarboxylic acid unit (A4), and a diol unit (B). The mass ratio of the polyester resin (1) in the photosensitive layer is 15 mass% or more.SELECTED DRAWING: None

The invention discloses an environment-friendly flame-retardant polyester yarn and a preparation method thereof, and relates to the technical field of textile, and the environment-friendly flame-retardant polyester yarn is prepared from the following raw materials in parts by weight: 100 parts of polyester chips, 10-15 parts of a flame-retardant polymer containing an organic salt structure, 1-3 parts of an antioxidant, 0.8-2 parts of a lubricant, 1-2 parts of benzotriazole sodium and 0.8-1.2 parts of quinoline yellow. The flame-retardant polymer containing the organic salt structure comprises a structural unit introduced by the following monomers: bis (3-aminophenyl) (3, 5-bis (trifluoromethyl) phenyl) phosphine oxide, 3, 7-diamino-5-phenylphenazine chloride and 3, 5-isoxazole dicarboxylic acid. The environment-friendly flame-retardant polyester yarn is good in ultraviolet aging resistance and flame retardance, high in strength and sufficient in softness.

The invention belongs to the technical field of high polymer materials, and particularly relates to spinning-grade all-aryl polynaphthyl ester resin and a preparation method thereof. According to the invention, p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, aromatic dicarboxylic acid and ethylene glycol monomer are adopted as raw materials, polymerization reaction is carried out under the action of the catalyst, spinning-grade all-aryl polynaphthyl ester resin is successfully obtained under specific reaction conditions, and the spinning-grade all-aryl polynaphthyl ester resin has high molecular weight, low impurity content and good heat resistance, and can be used for preparing the spinning-grade all-aryl polynaphthyl ester resin. The melt fluidity is good, the shear thinning phenomenon is more obvious, and the method can be directly used for preparing the polynaphthalene ester fiber.

The invention relates to the field of polyester materials, and particularly discloses modified polyester with low yellowness value and high glass transition temperature characteristics and a preparation method thereof, and the modified polyester is prepared by taking terephthalic acid, diphenyldicarboxylic acid and fluorenyl aromatic dicarboxylic acid as carboxylic acid monomers, respectively esterifying with ethylene glycol, and carrying out co-polycondensation on corresponding esterification products. According to the present invention, the biphenyldicarboxylic acid with the conjugated aromatic ring structure and the fluorenyl aromatic dicarboxylic acid monomer are selectively introduced to modify the PET, such that the regularity of the polyester chain segment is broken so as to ensure the optical performance of the polyester; the movement of a polyester chain segment is limited so as to improve the Tg value of polyester; and by matching with a novel preparation method, the yellowness value of the polyester material is reduced.

The invention provides an acid-resistant COFs material capable of rapidly and efficiently adsorbing thorium ions and a preparation method thereof, the COFs material is prepared by reacting an aldehyde monomer trialdehyde phloroglucinol and an amine monomer, and the amine monomer is 2, 5-diamino terephthalic acid or 4, 4 '-diamino-[1, 1'-biphenyl]-3, 3 '-dicarboxylic acid. The functionalized COFs material prepared by regulating and controlling the grafted carboxyl has excellent thorium ion adsorption performance, has high adsorption capacity under the condition of strong acid (pH = 1-3), reaches the maximum adsorption capacity of 696 mg / g within 10 hours under the conditions that the initial concentration C0 is 400 ppm and the pH = 3, reaches the maximum adsorption capacity of 225 mg / g within 10 hours under the conditions that the initial concentration C0 is 400 ppm and the pH = 1, and has excellent thorium ion adsorption performance. And meanwhile, the catalyst has high stability in a strong acid environment and shows excellent regeneration cycle performance.

The present invention relates to a composition containing A) 60 to 93 wt. % of at least one aromatic polycarbonate, polyester carbonate or mixtures thereof, B) 2 to 20 wt. % of a polyester on the basis of an aromatic or cycloaliphatic dicarboxylic acid or mixtures thereof and cyclohexane dimethanol and optionally an additional aliphatic diol, and C) 1 to 20 wt. % of at least one phosphorus-containing flame retardant. The invention also relates to a component that contains the composition and to the use of components B and C in the indicated quantities in order to improve CTI and flame retardancy of polycarbonate compositions.

The invention relates to a method for synthesizing tetrasubstituted-1, 3-allene dicarboxylic acid, and discloses a method for synthesizing tetrasubstituted-1, 3-allene dicarboxylic acid by taking 1, 3-enyne and iodide as raw materials, potassium formate as a formate source, DABCO as a hydrogen transfer catalyst, Ir (bpy) 2 (dtbpy) PF6 as a photocatalyst and cesium carbonate as alkali through the following steps: introducing CO2 at normal pressure; the allene dicarboxylic acid compound can be obtained at excellent to good yield under the irradiation of visible light at room temperature for 24 hours, the reaction condition is mild, the regioselectivity is good, the functional group tolerance is good, and many defects in the prior art are overcome.

To provide a resin composition which enables provision of a film that is excellent in transparency, is low in a YI value (Yellow Index) and is excellent in impact resistance, and a film, a polarization sheet and sunglasses.SOLUTION: A resin composition contains a polyamide resin containing an alicyclic diamine unit and an aliphatic dicarboxylic acid unit having 7 to 20 carbon atoms, and a polyetheramide elastomer.SELECTED DRAWING: None

The invention discloses a water body heavy metal ion pollution treatment adsorption filtering membrane and a preparation method thereof, and relates to the technical field of water treatment. When the water body heavy metal ion pollution treatment adsorption filtering membrane is prepared, graphene oxide sequentially reacts with 3-diethylaminopropylamine, tetrabromophenyl porphyrin and N, N-diethyl allylamine, and functionalized graphene oxide is prepared; the preparation method comprises the following steps: reacting cellulose with 4 '-bromo-2, 2': 6 ', 2' '-terpyridyl and maleic anhydride in sequence to prepare modified cellulose; the preparation method comprises the following steps: reacting sodium alginate with propylene oxide to prepare modified sodium alginate; the modified sodium alginate, the modified cellulose, the functionalized graphene oxide, trans, trans-1, 3-butadiene-1, 4-dicarboxylic acid and a photoinitiator are subjected to a reaction, a membrane is prepared, and the water body heavy metal ion pollution treatment adsorption filtering membrane is prepared. The water body heavy metal ion pollution treatment adsorption filtering membrane prepared by the invention has good antibacterial and photocatalytic organic matter degradation capabilities.

A process produces unsubstituted or at least monosubstituted α,ω-dicarboxylic acids and ketocarboxylic acids by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated cycloalkenes by electrochemical oxidation in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.

The invention provides a method for producing long-chain dicarboxylic acid and a long-chain dicarboxylic acid product. The method comprises the following steps: inoculating a seed solution of a fermentation strain into a fermentation tank, wherein a fermentation substrate comprises any one or more of fatty acid and derivatives thereof, and alkane; according to the method, green raw materials such as fatty acid and derivatives thereof, plant-based alkane and the like are adopted as substrates to partially or completely replace fossil energy such as petroleum alkane and the like, the product is green long-chain binary acid, and the bio-based content can be regulated and controlled. And the fermentation method provided by the invention can still maintain relatively high yield and conversion rate.

The invention relates to the technical field of foaming agents, and discloses a foaming agent and a preparation method and application thereof.The preparation method comprises the steps that polyethylene glycol and 4, 4 '-N-benzylaniline dicarboxylic acid are subjected to a reaction, then the reaction product and 2-bromoethyl sodium sulfonate are subjected to a reaction, and the foaming agent is obtained. According to the foaming agent, a polyether chain segment of polyethylene glycol serves as a main chain, a large number of sulfonate groups are introduced into a side chain, and the foaming agent shows very high surface activity performance, has very high foam volume and half-life period at different mass concentrations and is very good in foaming performance. And in oil field well water with different mineralization degrees, the foam volume and the half-life period are very high, the salt resistance is excellent, and the high temperature resistance is good.

The invention discloses a water-soluble phosphonated polybenzimidazole polymer and a preparation method thereof, and particularly, under the protection of nitrogen flow, 3, 3 '-diaminobenzidine and diphosphonic acid substituted aromatic dicarboxylic acid react for 6-30 hours at 180-250 DEG C by taking polyphosphoric acid as a medium, and the phosphonated polybenzimidazole polymer is obtained through polycondensation. The phosphonated polybenzimidazole polymer disclosed by the invention has good solubility in water under an alkaline condition, can be used as a solvent in subsequent processing, has the characteristics of no pollution and environmental protection, is easy to recover and has a wide application prospect.

The invention belongs to the technical field of polyester polyol, and particularly relates to high-functionality low-viscosity polyester polyol and a step-by-step synthesis method thereof. Comprising the following steps: (1) adding dihydric alcohol, dicarboxylic acid, a catalyst and an antioxidant into a reaction kettle, heating and vacuumizing, and carrying out esterification and ester exchange reaction to prepare a polyester polyol intermediate; and (2) cooling the polyester polyol intermediate prepared in the step (1), adding polyol into the reaction kettle, and continuously carrying out ester exchange reaction to obtain the high-functionality low-viscosity polyester polyol after the reaction is finished. According to the step-by-step synthesis method, the problems that in the prior art, high-functionality polyester polyol is large in viscosity and low-viscosity products are difficult to prepare are solved, the viscosity of the high-functionality polyester polyol can be effectively reduced under the same raw material system and hydroxyl value conditions through specific raw material selection and process control, and the method is simple in process and easy to implement. The industrial production is convenient.

The invention relates to the field of high polymer materials, and discloses a preparation method and application of high-temperature-resistant transparent modified polyester. The preparation method comprises the following steps: 1) blending 9, 9-di-[(4-phenylphenoxy) dibenzoic acid] fluorene with diacid and dihydric alcohol, and carrying out esterification reaction; and 2) carrying out condensation polymerization on the esterification product to obtain the high-temperature-resistant transparent modified polyester with the glass transition temperature of more than 70 DEG C. According to the invention, 9, 9-di-[(4-phenylphenoxy) dibenzoic acid] fluorene is used as a modification monomer, and is copolymerized with other dibasic acids and dihydric alcohols to synthesize the modified polyester, and the modified polyester has high transparency and still has good mechanical properties and dimensional stability at high temperature. Therefore, the high-temperature-resistant transparent modified polyester is applicable to the application fields of optical films, optical lenses, reflective protective films, optical fibers or liquid crystal displays and the like.

The invention discloses a method for catalyzing the alternating copolymerization reaction of epoxide and cyclic anhydride, which utilizes a composite dicarboxylic acid zinc catalyst to catalyze the alternating copolymerization reaction of epoxide and cyclic anhydride, and comprises the following components in molar ratio: a) a zinc compound; and b) the ratio of the metal hydrogen compound is 1: (0.1-12). The zinc compound is a compound with a general formula of Zn-R (COO) 2, wherein R is C1-C8 alkyl; the metal hydrogen compound is a compound with a general formula of XHY, X is Li, Na, Mg, K, Ca, Be, Sr, Ba, Ra, Fr, Rb or Cs, and Y is 1, 2 or 3. The composite catalyst prepared by the invention is simple in preparation method, is applied to catalysis of alternate copolymerization of epoxide and cyclic anhydride, and has the characteristics of high catalytic activity and low polyether content.

The invention discloses preparation and application of a manganese hydroxylate modified zirconium-based metal organic framework, and belongs to the technical field of wastewater treatment. According to the preparation method, firstly, Mn oxide serves as a dopant, naphthalic acid serves as a frame connector, a zirconium-manganese bimetal organic frame is prepared through a hydrothermal method, and hydroxylation treatment is conducted through an alkali solution; mn replaces Zr atoms on a zirconium cluster to form high charge density with Zr, Mn and Zr can jointly participate in an electron transfer process and an active oxygen generation process to form double active centers, and the catalytic activity of a Fenton-like system is enhanced, so that the oxidative adsorption removal rate of As is remarkably improved. Experimental results show that the As removal rate can still reach 95.1% after five cycles, the targets of oxidative adsorption of As and reutilization are achieved, and the application of the zirconium-based metal organic framework in the field of catalytic adsorption of As is expanded.

Mixed aliphatic-aromatic polyesters having suitable thermal properties and terminal acidity characterised by having a dicarboxylic component comprising at least three saturated aliphatic C4-C24 dicarboxylic acids, their C1-C24 alkyl esters, their salts and their mixtures, azelaic acid and succinic acid always being present.

The invention provides a thermoplastic polyester elastomer as well as a preparation method and application thereof. The thermoplastic polyester elastomer comprises aromatic dibasic acid residues and aliphatic polyol residues, on the basis that the total molar weight of the aliphatic polyol residues is 100 mol%, the aliphatic polyol residues comprise 66 to 95 mol% of micromolecular diol residues, 2 to 24 mol% of polymer polyol residues and 1.5 to 10 mol% of third polyol residues; the third polyhydric alcohol residues comprise residues derived from a benzotriazole compound and residues derived from a tetramethyl piperidine compound. The thermoplastic polyester elastomer is good in light aging resistance, the surface of a workpiece is not separated out in the processing process and after the thermoplastic polyester elastomer is placed for a long time, and the requirement of automobile interiors for color change of light-color materials after light aging is met.

An object of the invention is to provide a polyester resin with highly reduced gelation, in addition to high moldability, surface smoothness, transparency, mechanical properties, heat resistance, thermal oxidative degradation stability, and chemical resistance. A polyester resin comprising a constituent moiety derived from terephthalic acid as a dicarboxylic acid component and constituent moieties derived from each of ethylene glycol, 1,4-butanediol, and a compound represented by a given structure as an alcohol component, wherein the dicarboxylic acid component comprises from 85 mol % to 100 mol % of terephthalic acid, the alcohol component comprises from 85 mol % to 100 mol % of 1,4-butanediol based on a total amount of ethylene glycol and 1,4-butanediol, and the alcohol component comprises from 0.001 mass % to 5 mass % of the compound represented by the given structure in 100 mass % of the alcohol component.

The present invention discloses a method for upgrading polyester materials to dicarboxylic acid esters and ethylene carbonate, and relates to the comprehensive utilization of waste resources and the cascade utilization of raw materials. The method uses multiple types of green ionic liquid catalysts to catalyze the methanolysis reaction of PET, and then dimethyl carbonate captures the generated ethylene glycol in situ, forms a five-membered cyclic ethylene carbonate through nucleophilic cyclization, pulls the reaction equilibrium to move forward, and completely depolymerizes PET waste. The products of the method of the present invention are dimethyl terephthalate and five-membered cyclic ethylene carbonate. The present invention can be used for the depolymerization and upgrading of waste PET materials, and can also be used for other similar polyesters, such as polyethylene succinate, polyethylene adipate and polyethylene 2,5-furan dicarboxylate, which are also suitable for the recovery strategy of the present invention, and the products are the corresponding dimethyl succinate, dimethyl adipate and 2,5-furan dicarboxylate.