146 results about "Phthalaldehyde" patented technology

The invention discloses a preparation method of an electrode based on a gold nanoparticle doped covalent organic framework composite material and relates to the technical field of electrochemical sensors. The preparation method comprises the following steps: firstly, dissolving 1,3,5-tri(4-aminophenyl benzene) and 2,5-dimethoxy p-phthalaldehyde into a solvent, reacting under the catalysis of acetic acid and obtaining TAPB-DMTP-COF; secondly, dispersing the TAPB-DMTP-COF into methanol, and then adding chloroauric acid and a sodium borohydride methanol solution in sequence for reacting to obtainAu@ TAPB-DMTP-COF; dispersing the Au@TAPB-DMTP-COF in water to obtain suspension, and then modifying the suspension on the surface of a glassy carbon electrode, thus obtaining the modified glassy carbon electrode based on a covalent organic framework material. The invention constructs an electrochemical sensor for detecting chlorogenic acid; current response of chlorogenic acid is improved by modifying the glassy carbon electrode with the Au@TAPB-DMTP-COF.

The invention provides a disinfectant with low corrosiveness. The disinfectant comprises the following components by weight percent: 0.2-2.0% of ortho-phthalaldehyde, 1-10% of a synergist, 10-50% of a cosolvent, 0.5-5% of a buffering agent, 1-10% of a penetrant, 0.2-2% of a corrosion inhibitor, 0.1-5% of a chelating agent, 0.1-3% of a stabilizing agent and 45-80% of purified water. After the disinfectant is used, intestinal tract pathogenic bacteria, pyogenic coccus, hepatitis virus, H7N9 avian influenza virus, black variant spores of bacillus subtilis and other pathogenic microorganisms can be killed within a short time. Furthermore, the disinfectant adopts a slow release technique, thus having extremely low corrosiveness on metal and being very suitable for disinfecting medical equipment.

The invention belongs to the technical field of preparation of self-repair materials, and particularly relates to a self-repair organosilicon material preparation method. The technological process comprises three steps of generation of ureido, generation of an imine bond and preparation of the material. An elastomeric material which can self-repair damage at room temperature is generated by three-system reaction the ureido and the imine bond are introduced in a PDMS crosslinking system, wherein the PDMS reacts with a diisocyanate to form the ureido, and an intermolecular hydrogen bond formed by the ureido can increase the crosslinking density of the material, enhance the mechanical properties of the material and improve the mechanical strength of the material; the stable imine bond generated by reaction of an aldehyde group and an amino can realize an excellent self-repairing function of the material; by controlling the use amounts of isocyanate and phthalaldehyde, the mechanical properties and the self-repairing performance of the material can be regulated and controlled, and the preparation method is simple and feasible; the manufacturing cost of the material is greatly reduced;the joint action of the hydrogen bond and the imine bond guarantees the mechanical strength of the material and considers the self-repairing performance of the material.

The invention discloses a test method of liquid spectrum finger diagram of melon, or melon injection, comprising that (1), preparing melon, or melon injection into a sample solution, (2), respectively absorbing citrulline water solution and the sample solution, to be filled into a liquid spectrometer, and using the solution of phthalaldehyde and the solution of chloride aminic acid fluorenes methyl ester to process derivatization, (3), testing liquid spetrum. The inventive test method first discloses a liquid spectrum finger diagram of melon or melon injection, with high accuracy, stability and repeatability, as one analysis test method which can control the product quality, used in product quality test. The inventive method first obtains the high-effect liquid spectrum contrast finger diagram of melon and melon injection, as diagram 1 and diagram 2.

The invention provides a preparation method for a multi-pore-passage hollow carbon nanosphere compound electrode material. The preparation method has a main technical scheme that a SiO2 porous micro-sphere is taken as a template, hydroquinone, 1, 4-phthalaldehyde and the like generate polyreaction to prepare the multi-pore-passage hollow carbon nanosphere compound electrode material, and through afusion diffusion method, the multi-pore-passage hollow carbon nanosphere compound material is subjected to sulfur filling compounding to obtain a porous hollow carbon sphere/ S compound electrode material. The hollow structure of the multi-pore-passage hollow carbon nanosphere compound electrode material prepared by the preparation method can provide a buffer space for volumetric strain of elemental sulfur in a lithium-sulfur battery in the charging and discharging process so as to be favorable for enhancing the electrical conductivity of the positive plate of the lithium-sulfur battery, andthe buffer space lowers an electrode structure change caused by the volume change of the elemental sulfur to a certain degree so as to be favorable for improving the capacity retention ratio of the lithium-sulfur battery.

The invention discloses a preparation method of an efficient phosphorus and nitrogen intumescent flame retardant and an application of the phosphorus and nitrogen intumescent flame retardant to polycaprocactam. The preparation method comprises the steps: carrying out condensation reaction on p-phthalaldehyde and 4,4'-methylenedianiline (DDM), and then, carrying out addition reaction on the product and DOPO to obtain solid nitrogen and phosphorus containing flame retardant molecules; and then, uniformly mixing the obtained flame retardant with polycaprolactam resin, and carrying out melt blending at 220-260 DEG C to obtain a halogen-free flame retardant polycaprolactam material. The method is capable of realizing synthesis at one step without separating intermediate products, simple in synthesis process, simple and convenient in aftertreatment, high in efficiency, safe, environment-friendly and convenient to realize industrial mass production; and the flame retardant belongs to a polymer-type flame retardant, contains a carbon source, an acid source and a nitrogen source, does not contain halogens and is nontoxic, pollution-free, green and environment-friendly, polycaprolactam reaches the UL94V-0 level when the addition amount of the flame retardant is 15%, and the mass percentage of residues is 37.8% at 700 DEG C.

The invention provides a preparation method of a high-efficiency flame retardant containing DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and aminopyrazine structures and application of the flame retardant and relates to the technical field of flame retardants. The preparation method of the high-efficiency flame retardant containing the DOPO and aminopyrazine structures comprises the following steps: (1) mixing aminopyrazine and p-phthalaldehyde in solvent, and carrying out a Schiff base reaction, wherein a reaction equation is shown in a formula of the description; (2) adding 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to generate a addition reaction with Schiff base so as to generate the flame retardant DTPA (Diethylenetriamine pentaacetic acid) containing an aminopyrazine structure, wherein a reaction equation is shown in the following formula of the description. According to the aminopyrazine-type flame retardant prepared by the invention, the flame-retarding efficiency is higher, the phosphorus content is 0.09-0.34%, the flame-retarding property of materials is improved, the oxygen index of cured epoxy resin can be increased to 32.5%, the vertical burning can reach UL-94 V-0 grade, and the use amount of the flame retardant under the same flame-retarding effect is less.

The invention provides a polyethylene glycol derivative, which comprises a repeating unit with a structure represented by a formula (I) and an end group with a structure represented by a formula (II).The polyethylene glycol derivative provided by the invention has good biocompatibility due to the repeating unit with the structure represented by the formula (I). Due to the fact that the o-phthalaldehyde terminal group with the structure represented by the formula (II) can react with various groups such as amino, (acyl) hydrazine, amido-oxy and the like, the reaction speed is high, and the reaction conditions are mild. The polyethylene glycol derivative provided by the invention and amino-terminated polyethylene glycol are mixed in an aqueous medium to quickly form a chemically cross-linkedhydrogel material, and the chemically cross-linked hydrogel material has the advantages of mild preparation conditions, high gelling speed, high mechanical strength and good stability. The polyethylene glycol hydrogel can be used as a drug sustained-release carrier or a tissue engineering scaffold and the like to be applied to the field of biomedical materials.

The invention relates to a Schiff base, as well as a preparation method and applications of the Schiff base as a steel pickling inhibitor for steel products. Particularly, the Schiff base is prepared through condensation of p-phthalaldehyde and sulfanilic acid under the action of the base, and the Schiff base can prevent corrosion of the steel products caused by the acid solution during the pickling process and unnecessary consumption of the acid solution. When the Schiff base concentration is 0.49-2.4g/L in the pickling solution with a hydrochloric acid concentration of 1.0mol/L, the inhibition effect on the steel products is obvious. The Schiff base provided by the invention has simple preparation precess and available and cheap raw materials, and is soluble in water. When used as the inhibitor, the Schiff base has the advantages of simple using method, low dosage, strong continuous-effect of inhibition and the like.

The invention discloses a preparation method for a montelukast sodium intermediate. The preparation method comprises the steps of reacting 7-chloroquinaldine with m-phthalaldehyde to generate a compound shown in formula II; reacting the compound shown in formula II with vinyl magnesium halide to generate a compound shown in formula III; reacting the compound shown in formula III with a compound shown in formula IV to generate a compound shown in formula V; carrying out a reduction reaction on the compound shown in formula V to generate a compound shown in formula VI; and reacting the compound shown in formula VI with methyl magnesium halide to generate a compound shown in formula I. According to the preparation method disclosed by the invention, production cost is further reduced, and a technological basis is laid for large-scale industrialized production for the intermediate.

The invention provides test paper for testing the concentration of an ortho-phthalaldehyde disinfectant. The test paper comprises a base plate and a reaction cushion pasted on the base plate, wherein the reaction cushion is obtained by drying filter paper which is dipped in a sulfite solution and a pH mixing indicating agent solution; when the content of ortho-phthalaldehyde is greater than the minimum effective concentration, the pH value of a reaction product completely exceeds the color change point of the mixing indicating agent, the test paper reaction cushion is completely changed into blue purple from yellow, and the higher the concentration of ortho-phthalaldehyde is, the darker the blue purple color on the test paper reaction cushion is. The test paper is rapid and flexible in reaction, is short in color developing time, can be taken out when being dipped into the ortho-phthalaldehyde disinfectant for one second, can analyze the testing result in one minute by referring to a color chart of an operation instruction, is simple, convenient and rapid to use, and is conveniently used for detecting medical instruments, such as an endoscope in the disinfection process any time by medical staff in a hospital.

Germicidal compositions including a phthalaldehyde and methods of using such compositions for killing bacteria, disinfection, or sterilization, are disclosed. In one aspect, a germicidal composition may include a diluent, a germicidal compound, such as phthalaldehyde, and an amount of isophthalaldehyde to enhance the germicidal efficacy of the germicidal compound. In the case of phthalaldehyde, the composition may have a staining property that is less than a staining property of a composition consisting essentially of phthalaldehyde diluted to the same concentration. In another aspect, the composition may further include an amount of terephthalaldehyde to enhance the germicidal efficacy of the phthalaldehyde. In yet another aspect, a germicidal composition may include a diluent, phthalaldehyde, and a material such as isophthalaldehyde, terephthalaldehyde, or a combination of isophthalaldehyde and terephthalaldehyde, in order to reduce a staining property of the phthalaldehyde.

The invention discloses a double-pillararene mercury ion fluorescence sensor. Ethanol is taken as a solvent, amidated pillar[5]arene and p-phthalaldehyde are taken as substrates, the solvent and the substrates are subjected to refluxing under the catalytic action of glacial acetic acid, suction filtration is performed, a product is washed with ethanol and subjected to vacuum drying, and light yellow solids are obtained. The sensor can emit stronger yellow green fluorescence in a DMSO-H2O amphiphilic solution on the basis of aggregation. 16 common cation solutions are respectively added to theDMSO-H2O solution of the mercury ion sensor, it is discovered that fluorescence quenching of the mercury ion sensor can be realized only when mercury ions are added, besides, the fluorescence quenching and recognition processes are not disturbed by other ions, fluorescence detection limit of QS for Hg<2+> is 4.3*10<-8> M, and higher sensitivity is achieved. Besides, the sensor has self-aggregationbehavior, and a gel film prepared from the sensor can be applied to a safe display material of Hg<2+>.

The invention discloses a preparation method of a porous covalent organic framework and application of the porous covalent organic framework in uranyl ion capture, belonging to the technical field of adsorption materials. The preparation method comprises the following step: carrying out an aldol condensation reaction on 2,5-dihydroxy-1,4-phthalaldehyde (DHBD) and 2,4,6-trimethyl-1,3,5-triazine (TMT) to prepare an olefinic bond porous covalent organic framework (DHBD-TMT). The DHBD-TMT prepared by the method disclosed by the invention has a large number of hydroxyl functional groups and a highly planar pi-conjugated structure, and can simultaneously realize multiple functions of selective adsorption, chemical reduction, photocatalytic reduction of uranium and the like, so the adsorption capacity of uranium is remarkably improved. Inductively coupled plasma mass spectrometry results show that DHBD-TMT has excellent adsorption performance on uranyl ions, and has the advantages of high adsorption capacity, good selectivity, excellent optical activity, high stability, good hydrophilicity and the like. Besides, the DHBD-TMT can reduce soluble uranium (VI) into insoluble uranium (IV) through chemical reduction and photocatalytic reduction under visible light irradiation, so uranium fixation is realized; and the DHBD-TMT is an efficient adsorbent for extracting uranyl ions.

The invention discloses an OPA (ortho-phthalaldehyde)-containing compound disinfectant as well as a preparation method and an application thereof. The compound disinfectant comprises the following effective components: OPA, double-chain quaternary ammonium salt, a cosolvent, a metal chelator, dihydric phosphate, salt phosphate dibasic and water, and the pH of the compound disinfectant ranges from 7.5 to 9.0. According to the invention, the defect that single-component OPA cannot kill bacterial spores effectively is overcome through compounding of OPA and double-chain quaternary ammonium salt, and the application range of the OPA disinfectant is broadened. The disinfectant is suitable for high-level disinfection and sterilization of moisture-proof medical equipment which is not resistant to heat; and the compound disinfectant can be used for manual immersion disinfection and sterilization for the medical equipment and automatic mechanical flushing disinfection and sterilization, and has the characteristics of high efficiency (high-level disinfection through immersion for 20 min and sterilization for 45 min), no corrosion or pungent smell, safety, low toxicity, stable property, convenience in use and the like.

Disclosed herein are methods of synthesizing a 4-substituted-benzene-1,2-carbaldehyde. In one aspect, a method may include reacting a 4-substituted-1,2-bis(dibromomethyl) benzene with sulfuric acid to form a reaction product, introducing a solid sodium bicarbonate into the reaction product, and hydrolyzing the reaction product to form a 4-substituted-benzene-1,2-carbaldehyde, after introducing the bicarbonate.

Disclosed herein are germicidal compositions, kits, methods for preparing the germicidal compositions, and methods of using the compositions for disinfection or sterilization. In one aspect, a solid composition may include a solid having water solubility greater than phthalaldehyde, and a germicide diluted in the solid. In another aspect, a kit for preparing a germicide solution may include a germicide, an enhancer for the germicide, and at least two compartments to contain the germicide and the enhancer. In yet another aspect, an apparatus may be used to prepare a germicidal solution. The apparatus may include a first port to receive a first composition including a germicidally effective compound, a second port to receive a second composition including an enhancer for the germicidally effective compound, a source of water, and germicidal solution preparation logic to control preparation of the germicidal solution from the first and the second compositions and the water.

The invention relates to a method for synthesizing planar chiral diferrocene phosphine diimide, and this ligand contains diimine and has a planar chiral diferrocene structure. This compound is condensed of planar chiral ferroceneprimary amide and various dialdehyde compounds under the existence of shrinking agent. The dialdehyde compounds can be p-phthalaldehyde, o-phthalaldehyde, m-phthalaldehyde, phenyl dialdehyde, butyl dialdehyde, glutaric dialdehyde, etc. and the method has the advantages of simple synthesizing route, simple operation, easy purification, and high yield. The invention is applied to the catalytic reactions such as aromatic ketone unsymmetrical hydrogen transfer reaction and can achieve very high yield and enantiotropic selectivity.

The invention discloses a double-colorimetric double-fluorescent phenanthroimidazole probe as well as a preparation method and application thereof, and relates to a phenanthroimidazole probe as well as a preparation method and application thereof. The technical problems that an existing colorimetric probe is single in response object and low in response speed, and quantitative detection cannot beachieved are solved. The preparation method of the double-colorimetric double-fluorescent phenanthroimidazole probe the structural formula of which is shown in the specification, comprises the following steps: adding 2-(4-aminophenyl) phenanthroimidazole and m-phthalaldehyde into an organic solvent I for reaction, and filtering, washing, drying and recrystallizing separated solids to obtain the double-colorimetric double-fluorescent phenanthroimidazole probe. The probe is used for detecting Cu<2+> and Ag<+> in a solution. Qualitative detection can be achieved through a colorimetric method or afluorescence method, and quantitative detection can be achieved through a fluorescence standard curve method. The detection response time is 2-3 min, the detection concentration reaches the nM level,and the method can be used in the field of industrial wastewater and drinking water detection.

We disclose methods and compositions for preparation of stimuli-responsive plastics that are capable of responding to chemical and/or physical signals in their environment. In one embodiment the plastics consist of patterned mixtures of poly(phthalaldehyde) polymers in which each polymer contains a different end-capping group (also called a “trigger”), responsive to a different signal. Other embodiments use different polymers and different triggers. The plastics may be homogeneous in composition, but each polymer within the plastic is capable of responding to a different signal and depolymerizing once this signal reacts with the trigger. This process of depolymerization enables the plastic to alter its physical features non-linearly to external signals: i.e., the degree of change in physical form is much larger than the intensity of the initial signal.

A cleaning composition comprising: a disinfectant; and an antimicrobial component including a silane quaternary ammonium ion or salt thereof. The disinfectant can include ortho-phthalaldehyde, peracetic acid, glutaraldehyde, a phenol, sodium hypochlorite, hydrogen peroxide, among other disinfectants. Such other disinfectants include two or more of octyldecyldimethyl ammonium chloride, dioctyldimethyl ammonium chloride, didecyldimethyl ammonium chloride, and n-alkyl (C14 to C16) dimethylbenzyl ammonium chloride. The silane quaternary ammonium ion or salt thereof can be one or more of: 3-(trimethoxysilyl)propyldimethyloctadecyl ammonium ion, 3-(trimethoxysilyl)propyldimethyloctadecyl ammonium chloride, 3-(trihydroxysilyl)propyldimethyloctadecyl ammonium ion, or 3-(trihydroxysilyl)propyldimethyloctadecyl ammonium chloride. The silane quaternary ammonium ion or salt thereof can constitute 0.05% to 5% by weight of the cleaning composition. The phenol can constitute 0.10% to 2.0% by weight of the cleaning composition. The cleaning composition can further include a propellant, and the cleaning composition can be contained in an aerosol can.