14 results about "Phthalaldehyde" patented technology

The invention relates to the technical field of carbon material preparation, in particular to phenolic resin-based porous carbon and a preparation method thereof. The core of the preparation method of the phenolic resin-based porous carbon is that the mass ratio of phenolic aldehyde to phenolic aldehyde is optimized (1: (1-1.2)) to ensure sufficient crosslinking, and an amine catalyst is selected to reduce metal residues; meanwhile, terephthalaldehyde is introduced as a cross-linking accelerant, so that the bridging density and thermal stability of a resin network are effectively enhanced, and structural collapse is inhibited in subsequent carbonization; a sectional type carbonization process is further adopted, and the carbon skeleton is preserved by controlling the heating rate. According to the method, the carbonization yield is finally and successfully improved to 58% or above (improved by 15%-20% compared with that of a traditional method), the ash content is remarkably reduced (smaller than or equal to 0.2%), and an excellent material with a small mesoporous structure (the average pore diameter ranges from 2 nm to 10 nm) and a high specific surface area (larger than or equal to 1500 m < 2 > / g) is obtained.

The application discloses a synthesis method of o-phthalaldehyde. O-xylene, a halogenated reagent and an organic solvent are mixed, and under ultraviolet light irradiation, a bromination product with different bromination degrees is generated by reaction; water is added into the reaction liquid, and the reaction is continuously carried out; after the reaction is completed, the organic solvent and water are removed by evaporation, and a crude ɑ, ɑ, ɑ', ɑ'-tetra-brominated o-xylene product is obtained; the crude product is recrystallized to obtain ɑ, ɑ, ɑ', ɑ'-tetra-brominated o-xylene product; and the ɑ, ɑ, ɑ', ɑ'-tetra-brominated o-xylene is hydrolyzed to obtain o-phthalaldehyde. The synthesis method optimizes the bromination and hydrolysis process, and by adding appropriate water in the o-xylene bromination process, the yield of the final product o-phthalaldehyde is improved.

The application provides a high-dispersibility water-based covalent organic framework soil modifier and application thereof in saline-alkali soil treatment. 2 The porous covalent organic framework material is synthesized from p-phthalaldehyde and sulfonated modified tri(4-aminophenyl)amine monomers; and a surfactant and / or a stabilizer are further added. The porous covalent organic framework material is synthesized from p-phthalaldehyde and sulfonated modified tri(4-aminophenyl)amine monomers, in-situ condensation is performed, and sulfonic acid groups are uniformly introduced, so that the hydrophilicity is improved, good adsorption capacity can be maintained in subsequent drip irrigation, and the nanoscale water dispersion liquid is prepared through subsequent high-pressure homogenization process.

The invention relates to a metal organic framework siloxane self-repairing antifouling composite material and a preparation method and application thereof.The preparation method comprises the steps that multiple kinds of siloxane containing amino are mixed to obtain mixed amino silane, terephthalaldehyde, absolute ethyl alcohol and diluted hydrochloric acid are added into the mixed amino silane, and heating is conducted to obtain a siloxane prepolymer solution; dropwise adding a silver nitrate solution into a trimesic acid solution to react to generate a silver ion organic framework material; and finally, adding the silver ion organic framework material into the siloxane prepolymer solution, uniformly dispersing, heating and curing to obtain the metal organic framework siloxane self-repairing antifouling composite material. The material has excellent self-repairing capability, when the material is broken, the self-healing of a damaged area can be realized under a mild condition, and the original mechanical property and barrier function of the material can be recovered; the introduction of the silver ion organic framework material not only plays a reinforcing role, but also endows the composite material with potential antibacterial performance, and widens the application prospect of the composite material in the antifouling field.

The invention discloses a lithium ion battery diaphragm, a preparation method and a battery thereof, the lithium ion battery diaphragm comprises a base membrane and a coating layer coated on the single side surface of the base membrane, the coating layer comprises the following raw materials by mass: 0.6%-2% of polymer particles, 38%-39.4% of a binder, 42%-54% of a solvent, and 6%-18% of a dispersant; the polymer particles are prepared by polymerizing 2, 4-diamino-6-chloropyrimidine or 2, 4-diamino-6-fluoropyrimidine and terephthalaldehyde, so that collaborative optimization of thermal stability and wettability of the diaphragm is realized, and meanwhile, the cycling stability and rate discharge performance of a battery are improved.

The application discloses a sub-micron Py-TPA COF monocrystal wafer and a preparation method thereof, and belongs to the material field. The preparation method of the Py-TPA COF monocrystal wafer comprises the following steps: mixing tetra-(4-aminophenyl)pyrene, p-phthalaldehyde, mesitylene and an acetic acid solution, and performing a solvothermal reaction to obtain the Py-TPA COF monocrystal wafer. The preparation method has the advantages of short reaction time and high reaction yield, and the prepared sub-micron Py-TPA COF monocrystal wafer has uniform morphology and size.

The present invention relates to polysaccharide-based polymeric crosslinkers, polysaccharide-based biomaterials, preparation methods, and uses. In the present invention, the polysaccharide-based polymeric crosslinker is a polysaccharide-based polymeric crosslinker modified with ortho-phthalaldehyde groups, which does not rely on a synthetic hydrophilic polymer backbone or complex chemical synthesis processes. The polysaccharide-based polymeric crosslinker provided by the present invention, together with water-soluble small molecules or polymers containing one or more groups selected from the group consisting of primary amine, hydrazine, hydrazide, hydroxylamine, and mercapto groups, forms a two-component polysaccharide-based hydrogel material in an aqueous medium. This two-component polysaccharide-based hydrogel material has the advantages of being injectable, having low swelling, and having high tissue adhesion. Furthermore, the two-component polysaccharide-based hydrogel material provided by the present invention can be further fabricated into polysaccharide-based biomaterials in the form of membranes, powders, sponges, and other forms, and can be used as tissue adhesives, sealants, hemostats, tissue engineering materials, and other applications, demonstrating its potential for a wide range of biomedical applications.

The invention belongs to the field of protein hydrogel materials, and particularly relates to elastin-like and a preparation method and application of elastin-like hydrogel. According to the present invention, the two elastin-like proteins A and B having different amino acid sequences are utilized to form the cross-linked network through the isopeptide bond, such that the mechanical strength of the polymer hydrogel composed of the four-arm polyethylene glycol amine, 4-arm PEG-NH2 and the o-phthalaldehyde modified four-arm polyethylene glycol, 4-arm PEG-OPA can be effectively improved, the adhesion can be improved, and the cross-linked network can be used for the preparation of the polymer hydrogel, such that the cross-linked network can be formed through the cross-linked network, such that the cross-linked network can be used for the preparation of the polymer hydrogel, and the use amount of the polymer hydrogel can be reduced. The obtained elastin-like hydrogel has the advantages of strong wet tissue adhesion capacity, good biocompatibility, injectable use and the like, and is beneficial to application in the biomedical fields of hemostasis, tissue repair and the like.

This invention discloses an amino acid assay kit based on the o-phthalaldehyde (OPA) method, its preparation method, and its application. Belonging to the field of amino acid detection and analysis technology, it is used for rapid and accurate quantitative detection of amino acids in samples. The amino acid assay kit can not only measure the total amino acid content but also analyze specific amino acids and dipeptides such as alanine glutamine, meeting diverse analytical needs. This amino acid assay kit is suitable for batch testing and supports high-throughput laboratory applications. By optimizing the reagent formulation and operating procedures, this invention effectively simplifies the detection steps, improves detection sensitivity and specificity, and fills the gap in the market for OPA-based assay kits. This invention can be widely applied in nutrition, medicine, clinical diagnostics, and drug development, providing a convenient and efficient amino acid analysis tool for life science and medical research.

The invention discloses a conjugated microporous polymer based on terephthalaldehyde, a preparation method and application, relates to the related technical field of seawater desalination materials and sewage purification materials, and aims to overcome the technical problem of low photothermal conversion efficiency in the prior art. According to the invention, an efficient, stable and low-cost solution can be provided for seawater desalination and sewage purification.

The invention discloses a preparation method of a self-repairing conductive composite material and a homogeneous integrated flexible capacitive pressure sensor, and a flexible robot, and relates to the technical field of self-repairing materials. Amino groups of amino-terminated polydimethylsiloxane and aldehyde groups from 4, 4 '-dithiodiacyldibenzaldehyde and 1, 4-phthalaldehyde are subjected to a Schiff base reaction to form imine bonds, and meanwhile, disulfide bonds are introduced through the 4, 4'-dithiodiacyldibenzaldehyde, so that a dynamic cross-linked network is established on the basis of the synergistic effect of the imine bonds and the disulfide bonds; according to the self-repairing conductive composite material disclosed by the invention, the self-repairing capability of the material is promoted, and effective self-repairing in various complex environments such as room temperature, freezing environment, heating environment, water and salt solution is realized; the problem of low signal repairing efficiency caused by the problem that healing kinetics of all layers of materials of a multi-layer heterostructure sensor are not matched can be solved.

The invention discloses a preparation method and application of an imine covalent organic framework material containing DBU-based ionic liquid. An aniline compound and a phthalaldehyde compound are used as raw materials for condensation reaction to obtain an imine bond covalent organic framework, and then DBU-based ionic liquid is connected to the covalent organic framework through a covalent bond to prepare the material. The material obtained by the invention has the advantages of uniformly distributed active sites, better stability, easiness in recovery and the like, and can show excellent catalytic performance when being applied to two different reactions of catalyzing cycloaddition of carbon dioxide and epoxypropane to synthesize propylene carbonate and catalyzing ester exchange of propylene carbonate and methanol to synthesize dimethyl carbonate.

Disclosed are methods for constructing conjugates. An amine-containing component and a thiol-containing component, in comparable mole ratios, react with an ortho-phthalaldehyde in one step, to generate a conjugate bearing a substituted or an unsubstituted 1-thio-isoindole structure in the presence of an additive. The method provides a platform for the efficient and practical constructions of bioactive modular motifs.

The invention belongs to the technical field of biochemical engineering and enzyme engineering, and particularly relates to a graded porous spherical organic polymer immobilized enzyme nanoreactor and a preparation method thereof.The preparation method comprises the following steps that S1, paraphthaldehyde and m-phenylenediamine are weighed to serve as comonomers, and the comonomers and a structure-directing agent Pluronic F127 are jointly dissolved in methylbenzene to form an organic phase; s2, the organic phase is slowly added into a water phase composed of water and ethyl alcohol through stirring, and F127-methylbenzene-monomer composite micelles are formed; s3, adding acetic acid, and guiding the polymer to form spherical particles with a macroporous-mesoporous hierarchical structure by using the F127-toluene-monomer composite micelle as a soft template; s4, centrifuging, washing and drying to obtain a graded porous spherical polymer carrier; and S5, dispersing the graded porous spherical polymer carrier into a phosphate buffer solution of specific protease to obtain the graded porous spherical organic polymer immobilized enzyme nanoreactor.